deb: resolve cross pkg-config against the target multiarch

In-tree tools locate their libraries with the *host* pkg-config during
cross builds (the kernel's tools/build feature checks derive their
cflags/ldflags from 'pkg-config --cflags/--libs'), whose search path
only covers the build architecture's pkgconfig dirs. Cross builds of
linux-riscv died in rtla's Makefile.config: libtraceevent/libtracefs
were reported missing although the riscv64 -dev packages were
installed, because pkg-config never saw their .pc files.

The host-arch -dev packages that used to make those checks pass came
from the unscoped arch-indep build-dep pass, whose native
re-resolution b34e86d correctly scoped to the host arch — removing the
accidental co-install along with the bug it papered over. Export
PKG_CONFIG_LIBDIR for the target multiarch instead, so the checks
resolve target-arch libraries directly: no native build-dep bloat and
no wrong-arch linking.

src/build/mod.rs

@@ -14,7 +14,6 @@ pub mod env;
 
 use std::collections::{BTreeMap, HashMap};
 use std::error::Error;
-use std::io::IsTerminal;
 use std::path::{Path, PathBuf};
 use std::process::{Command, Stdio};
 use std::sync::Arc;
@@ -24,8 +23,8 @@ use crate::context::{LineSink, Stream};
 use crate::debian::{
     ChecksumEntry, ControlInfo, FileChecksums, FilesEntry, FilesList, parse_paragraphs,
 };
-use crate::ui::deb::DebUi;
+use crate::logfmt::{DpkgSourceClassifier, GenericClassifier};
-use crate::ui::logfmt::{DpkgSourceClassifier, GenericClassifier};
+use crate::report::{BuildTarget, BuildView, Prompter};
 
 /// Whether the upload distributes the upstream orig tarballs (`--orig`),
 /// mirroring the `dpkg-genchanges` source styles.
@@ -74,105 +73,118 @@ pub struct SourceBuildOutput {
     pub signed: bool,
 }
 
+impl SourceBuildOutput {
+    /// All produced artifacts in distribution order: dsc → tarballs →
+    /// buildinfo → changes.
+    pub fn artifacts(&self) -> Vec<PathBuf> {
+        let mut artifacts = Vec::with_capacity(3 + self.tarballs.len());
+        artifacts.push(self.dsc.clone());
+        artifacts.extend(self.tarballs.iter().cloned());
+        artifacts.push(self.buildinfo.clone());
+        artifacts.push(self.changes.clone());
+        artifacts
+    }
+}
+
+/// Parameters of one [`build_source_package`] call: where to build, the
+/// domain options, and the reporting ports (view and prompter).
+pub struct BuildSourceOptions<'a> {
+    /// Source tree to package. When unset, the process's current working
+    /// directory is used (resolved to an absolute path).
+    pub source: Option<PathBuf>,
+    /// Domain options (signing, orig-tarball inclusion, ...).
+    pub options: SourceBuildOptions,
+    /// Where build events (target, phases, messages, outcome) are reported.
+    pub view: &'a dyn BuildView,
+    /// Who answers the questions the flow may ask (e.g. the re-vendor
+    /// retry offer).
+    pub prompter: &'a dyn Prompter,
+}
+
+impl Default for BuildSourceOptions<'_> {
+    fn default() -> Self {
+        static QUIET: crate::report::Quiet = crate::report::Quiet;
+        BuildSourceOptions {
+            source: None,
+            options: SourceBuildOptions::default(),
+            view: &QUIET,
+            prompter: &QUIET,
+        }
+    }
+}
+
 /// Build a Debian source package (to a .dsc) using the native pipeline.
 ///
-/// When `ui` is set, subprocess output is captured into a live view (status
+/// Subprocess output is captured into the view (status line + rolling
-/// bar + rolling pane) and tee'd to a log file; on failure the view prints a
+/// pane for the terminal adapter) and tee'd to a log file; on failure the
-/// summary of the last captured errors. Without a UI, commands inherit the
+/// view prints a summary of the last captured errors. Headless callers use
-/// terminal as before.
+/// [`crate::report::Quiet`], in which case commands still run with captured
+/// output in test builds.
 ///
 /// A `dpkg-source -b` failure is classified (see
 /// [`classify_dpkg_source_failure`]); when the vendored rust dependencies
-/// diverged from the orig-vendor component and a terminal is attached, the
+/// diverged from the orig-vendor component, the flow asks the prompter
-/// flow offers to re-vendor, recreate the component and retry the build
+/// whether to re-vendor, recreates the component and retries the build
 /// exactly once.
+///
+/// On success the produced artifacts are reported through the view and
+/// returned.
 pub fn build_source_package(
-    cwd: Option<&Path>,
+    opts: BuildSourceOptions<'_>,
-    opts: SourceBuildOptions,
+) -> Result<SourceBuildOutput, Box<dyn Error>> {
-    ui: Option<Arc<DebUi>>,
-) -> Result<(), Box<dyn Error>> {
     // Default to the process's current working directory, resolved to an
     // absolute path: the output directory is derived from `cwd.parent()`
     // downstream, which only yields a real directory for an absolute `cwd`
     // (the parent of "." is the empty path).
-    let cwd = match cwd {
+    let cwd = match opts.source {
-        Some(p) => p.to_path_buf(),
+        Some(ref p) => p.clone(),
         None => std::env::current_dir()
             .map_err(|e| format!("cannot determine the current working directory: {e}"))?,
     };
-    let output = match run_source_build(&cwd, &opts, ui.clone()) {
+    let output = match run_source_build(&cwd, &opts.options, opts.view) {
         Ok(output) => output,
         Err(e) if e.downcast_ref::<VendorDriftError>().is_some() => {
-            return retry_after_revendor(&cwd, ui, opts, e);
+            return retry_after_revendor(&cwd, opts.view, opts.prompter, &opts.options, e);
         }
         Err(e) => {
-            if let Some(u) = &ui {
+            opts.view.finish_failure();
-                u.finish_failure();
-            }
             return Err(e);
         }
     };
 
-    // Artifact listing in dpkg order: dsc → tarballs → buildinfo → changes.
+    opts.view.finish_success(&output.artifacts());
-    let mut artifacts = Vec::with_capacity(3 + output.tarballs.len());
+    Ok(output)
-    artifacts.push(output.dsc.clone());
-    artifacts.extend(output.tarballs.iter().cloned());
-    artifacts.push(output.buildinfo.clone());
-    artifacts.push(output.changes.clone());
-
-    // The live view lists the artifacts itself when it renders; otherwise
-    // (verbose mode or non-TTY stdout) print them as plain lines.
-    let listed = match &ui {
-        Some(u) if u.is_enabled() => {
-            u.finish_success(&artifacts, u.elapsed());
-            true
-        }
-        _ => false,
-    };
-    if !listed {
-        for artifact in &artifacts {
-            println!("  {}", crate::ui::display_path(artifact));
-        }
 }
 
-    if output.signed {
+/// The re-vendor retry hook for a [`VendorDriftError`]: offer to re-run the
-        println!("Package built and signed successfully!");
+/// vendoring step through the prompter (the same helper the rust template
-    } else {
+/// uses at scaffold time), recreate the `orig-vendor` component from the
-        println!("Package built successfully (unsigned).");
+/// fresh `vendor/` tree and retry the source build exactly once. Without an
-    }
+/// accepting answer (headless prompters answer with the default, `false`)
-    Ok(())
+/// the original error is returned untouched.
-}
-
-/// The re-vendor retry hook for a [`VendorDriftError`]: on an interactive
-/// terminal, offer to re-run the vendoring step (the same helper the rust
-/// template uses at scaffold time), recreate the `orig-vendor` component
-/// from the fresh `vendor/` tree and retry the source build exactly once.
-/// Without a terminal (or on a declined offer) the original error is
-/// returned untouched.
 fn retry_after_revendor(
     cwd: &Path,
-    ui: Option<Arc<DebUi>>,
+    view: &dyn BuildView,
-    opts: SourceBuildOptions,
+    prompter: &dyn Prompter,
+    opts: &SourceBuildOptions,
     original: Box<dyn Error>,
-) -> Result<(), Box<dyn Error>> {
+) -> Result<SourceBuildOutput, Box<dyn Error>> {
-    let interactive = std::io::stdin().is_terminal() && std::io::stdout().is_terminal();
+    // The offer is only made when someone can answer it: headless prompters
-    if !interactive {
+    // answer with the default (false) without the error being logged here —
-        if let Some(u) = &ui {
+    // the caller logs the returned error itself, exactly once.
-            u.finish_failure();
+    if !prompter.interactive() {
-        }
+        view.finish_failure();
         return Err(original);
     }
-
     log::error!("{original}");
-    let retry = crate::ui::prompt::confirm(
+    if !prompter
+        .confirm(
             "Re-vendor the Cargo dependencies and retry the build?",
             false,
         )
-    .unwrap_or(false);
+        .unwrap_or(false)
-    if !retry {
+    {
-        if let Some(u) = &ui {
+        view.finish_failure();
-            u.finish_failure();
-        }
         return Err(original);
     }
 
@@ -189,9 +201,7 @@ fn retry_after_revendor(
         std::fs::remove_file(&config)?;
     }
     if !crate::new::templates::rust::vendor_dependencies(cwd)? {
-        if let Some(u) = &ui {
+        view.finish_failure();
-            u.finish_failure();
-        }
         return Err(
             "Re-vendoring did not complete: the tree is unchanged, fix the \
              vendoring by hand and build again."
@@ -218,7 +228,7 @@ fn retry_after_revendor(
     crate::new::orig::create_vendor_component(cwd, &entry.source, uversion)?;
 
     // 3. One retry, with the options of the original attempt.
-    run_source_build(cwd, &opts, ui).map(|_| ())
+    run_source_build(cwd, opts, view)
 }
 
 /// Run the full native source-build pipeline in `cwd`.
@@ -237,14 +247,12 @@ fn retry_after_revendor(
 pub fn run_source_build(
     cwd: &Path,
     opts: &SourceBuildOptions,
-    ui: Option<Arc<DebUi>>,
+    view: &dyn BuildView,
 ) -> Result<SourceBuildOutput, Box<dyn Error>> {
-    // Without a live UI, test runs still capture command output into the
+    // The view consumes the captured lines itself (live view + tee log);
-    // per-test log file instead of letting it inherit the terminal
+    // without one, test runs still capture command output into the per-test
-    let sink: Option<Arc<dyn LineSink>> = ui
+    // log file instead of letting it inherit the terminal
-        .as_ref()
+    let sink: Option<Arc<dyn LineSink>> = view.sink().or_else(crate::test_support::subprocess_sink);
-        .map(|u| u.sink())
-        .or_else(crate::test_support::subprocess_sink);
     // ------------------------------------------------------------------
     // 1. Sanity checks
     // ------------------------------------------------------------------
@@ -296,9 +304,19 @@ pub fn run_source_build(
 
     let ctrl = ControlInfo::parse(&control_path)?;
 
-    if let Some(u) = &ui {
+    view.target(BuildTarget {
-        u.set_build_target(&entry.source, &entry.version.full(), &entry.distribution);
+        package: &entry.source,
-    }
+        version: &entry.version.full(),
+        target: &entry.distribution,
+        display: format!(
+            "Building source package {} ({}) for {}",
+            entry.source,
+            entry.version.full(),
+            entry.distribution
+        ),
+        source_only: true,
+        tee_log: true,
+    });
 
     let source_display = entry.source.clone();
 
@@ -357,9 +375,7 @@ pub fn run_source_build(
     // ------------------------------------------------------------------
     // 5. dpkg-source lifecycle: before-build + source build
     // ------------------------------------------------------------------
-    if let Some(u) = &ui {
+    view.phase("Applying patches", Box::new(DpkgSourceClassifier::new()));
-        u.phase_custom("Applying patches", Box::new(DpkgSourceClassifier::new()));
-    }
     run_command(
         cwd,
         "dpkg-source",
@@ -372,9 +388,7 @@ pub fn run_source_build(
     // dpkg-buildpackage skips it entirely for source-only builds unless
     // forced with -D; unsatisfied dependencies abort with exit status 3.
     if opts.force_dep_check {
-        if let Some(u) = &ui {
+        view.message("Checking build dependencies");
-            u.progress_message("Checking build dependencies");
-        }
         let check_opts = crate::debian::deps::CheckOpts {
             host_arch: arch_vars
                 .get("DEB_HOST_ARCH")
@@ -389,19 +403,19 @@ pub fn run_source_build(
         };
         let report = crate::debian::deps::check_build_depends(&ctrl, &check_opts)?;
         if !report.is_ok() {
-            eprintln!("{}", report.message());
+            // The typed error carries the diagnostics (UnmetReport is
+            // public); the caller renders them and maps the type to exit
+            // status 3, like dpkg-buildpackage does.
             return Err(Box::new(crate::debian::deps::UnmetBuildDependencies(
                 report,
             )));
         }
     }
 
-    if let Some(u) = &ui {
+    view.phase(
-        u.phase_custom(
         "Building source package",
         Box::new(DpkgSourceClassifier::new()),
     );
-    }
     if let Err(failure) = run_command_capturing(
         cwd,
         "dpkg-source",
@@ -427,9 +441,7 @@ pub fn run_source_build(
     // ------------------------------------------------------------------
     // 6. .buildinfo generation (native dpkg-genbuildinfo equivalent)
     // ------------------------------------------------------------------
-    if let Some(u) = &ui {
+    view.message("Generating .buildinfo");
-        u.progress_message("Generating .buildinfo");
-    }
     // What the .buildinfo itself records: like dpkg-genbuildinfo, only the
     // referenced .dsc — not the tarballs, and never the buildinfo itself.
     let mut buildinfo_checksums = FileChecksums::new();
@@ -479,9 +491,7 @@ pub fn run_source_build(
     // ------------------------------------------------------------------
     // 7. .changes generation (native dpkg-genchanges equivalent)
     // ------------------------------------------------------------------
-    if let Some(u) = &ui {
+    view.message("Generating .changes");
-        u.progress_message("Generating .changes");
-    }
     // What the .changes distributes: the .dsc (with its recorded digests),
     // the tarballs listed in it (below), and the .buildinfo (last, as
     // dpkg-genchanges does when it consumes debian/files).
@@ -538,13 +548,11 @@ pub fn run_source_build(
     if opts.orig_source == OrigSourceMode::Never && !has_debian_part {
         log::warn!("ignoring --orig never for a native Debian package");
     }
-    if let Some(u) = &ui {
+    view.message(if strip_origs {
-        u.progress_message(if strip_origs {
         "Not including original source code in upload"
     } else {
         "Including full source code in upload"
     });
-    }
     // Stripped orig tarballs (and their detached .asc signatures) are not
     // distributed at all: not hashed, not required on disk, like
     // dpkg-genchanges.
@@ -634,9 +642,7 @@ pub fn run_source_build(
     // ------------------------------------------------------------------
     // 8. dpkg-source after-build (unapplies quilt patches it applied)
     // ------------------------------------------------------------------
-    if let Some(u) = &ui {
+    view.phase("Restoring patches", Box::new(DpkgSourceClassifier::new()));
-        u.phase_custom("Restoring patches", Box::new(DpkgSourceClassifier::new()));
-    }
     run_command(
         cwd,
         "dpkg-source",
@@ -652,9 +658,7 @@ pub fn run_source_build(
     if let Some(keyid) = signing_key.filter(|_| do_sign) {
         crate::utils::gpg::validate_key_id(&keyid)?;
 
-        if let Some(u) = &ui {
+        view.phase("Signing artifacts", Box::new(GenericClassifier::new()));
-            u.phase_custom("Signing artifacts", Box::new(GenericClassifier::new()));
-        }
 
         log::info!("Signing {}", dsc_name);
         crate::utils::gpg::clearsign_file(&dsc_path, &keyid)?;
@@ -1039,7 +1043,7 @@ mod tests {
         .expect("write control");
         std::fs::write(tree.join("debian/rules"), "#!/usr/bin/make -f\n").expect("write rules");
 
-        let err = run_source_build(&tree, &SourceBuildOptions::default(), None)
+        let err = run_source_build(&tree, &SourceBuildOptions::default(), &crate::report::Quiet)
             .expect_err("binary-only entries must not build a source package");
         let err = err.to_string();
         assert!(err.contains("binary-only"), "{err}");
@@ -1575,7 +1579,8 @@ mod differential_tests {
             OrigSourceMode::Never => &["-sd"],
         };
         run_dpkg(&golden_tree, source_style);
-        run_source_build(&ours_tree, opts, None).expect("native source pipeline failed");
+        run_source_build(&ours_tree, opts, &crate::report::Quiet)
+            .expect("native source pipeline failed");
 
         let entry =
             crate::debian::parse_changelog_entry(&ours_tree.join("debian/changelog")).unwrap();
@@ -2160,7 +2165,7 @@ Provides: virtual-thing (= 2.0), plain-virtual
         );
 
         // Ours: the native pipeline refuses likewise.
-        let err = run_source_build(&tree, &SourceBuildOptions::default(), None)
+        let err = run_source_build(&tree, &SourceBuildOptions::default(), &crate::report::Quiet)
             .expect_err("native source build must refuse a binary-only entry");
         assert!(err.to_string().contains("binary-only"), "{err}");
     }

src/changelog.rs

@@ -5,13 +5,30 @@ use std::fs::File;
 use std::io::{Read, Write};
 use std::path::Path;
 
+/// Outcome of a successful [`generate_entry`] call: everything the CLI
+/// renders for the user, and everything a library consumer needs to chain
+/// further steps.
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub struct GeneratedEntry {
+    /// Source package name from the previous changelog entry.
+    pub package: String,
+    /// Version the changelog carried before the new entry was prepended.
+    pub previous_version: String,
+    /// Version of the freshly added entry.
+    pub new_version: String,
+    /// Distribution series the new entry targets.
+    pub series: String,
+    /// The changelog file that was updated.
+    pub path: std::path::PathBuf,
+}
+
 /// Automatically generate a changelog entry from a commit history and previous changelog
 pub fn generate_entry(
     changelog_file: &str,
     cwd: Option<&Path>,
     user_version: Option<&str>,
     target_series: Option<&str>,
-) -> Result<(), Box<dyn std::error::Error>> {
+) -> Result<GeneratedEntry, Box<dyn std::error::Error>> {
     let changelog_path = if let Some(path) = cwd {
         path.join(changelog_file)
     } else {
@@ -19,8 +36,7 @@ pub fn generate_entry(
     };
 
     // Parse existing changelog to get current (old) version
-    let (package, old_version, series) = parse_changelog_header(&changelog_path)?;
+    let (package, old_version, current_series) = parse_changelog_header(&changelog_path)?;
-    println!("Found package: {}, version: {}", package, old_version);
 
     // Open git repo, and find commits since last version tag
     let repo_path = if let Some(path) = cwd {
@@ -44,7 +60,7 @@ pub fn generate_entry(
     };
 
     let (maintainer_name, maintainer_email) = get_maintainer_info()?;
-    let series = target_series.unwrap_or(&series).to_string();
+    let series = target_series.unwrap_or(&current_series).to_string();
     let new_entry = format_entry(
         &package,
         &new_version,
@@ -56,9 +72,13 @@ pub fn generate_entry(
 
     prepend_to_file(&changelog_path, &new_entry)?;
 
-    println!("Added new changelog entry to {}", changelog_path.display());
+    Ok(GeneratedEntry {
-
+        package,
-    Ok(())
+        previous_version: old_version,
+        new_version,
+        series,
+        path: changelog_path,
+    })
 }
 
 /// Compute the next (most probable) version number of a package, from old version and
@@ -139,6 +159,77 @@ pub fn parse_changelog_header(
     Ok((entry.source, entry.version.full(), entry.distribution))
 }
 
+/// What a new changelog entry may target as series, derived from the
+/// current changelog ([`series_candidates`]).
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub enum SeriesCandidates {
+    /// Offer `options` with `default` preselected; when the selection
+    /// cannot be made (cancelled, no interactive user) `fallback` — the
+    /// changelog's current series — is used instead.
+    Choose {
+        /// Series names to offer.
+        options: Vec<String>,
+        /// Preselected series.
+        default: String,
+        /// Series to fall back to when nothing can be selected.
+        fallback: String,
+    },
+    /// Nothing to choose: the series list was unavailable, keep the
+    /// current series.
+    Keep(String),
+}
+
+/// Derive the candidate series for a new changelog entry from the changelog
+/// at `changelog_path`.
+///
+/// An UNRELEASED entry offers itself as a pinned first option (selecting it
+/// keeps the changelog unreleased) on top of the current vendor's series
+/// list, defaulting to the development series; any other series resolves
+/// through the series list of its own distribution. `None` when the
+/// changelog cannot be parsed (no default to derive at all).
+pub async fn series_candidates(changelog_path: &Path) -> Option<SeriesCandidates> {
+    let (_package, _version, current) = parse_changelog_header(changelog_path).ok()?;
+
+    if crate::distro_info::is_unreleased(&current) {
+        // Vendors keep original casing ("Ubuntu"), while the series data
+        // keys are lowercase
+        let dist = crate::build::env::current_vendor().to_lowercase();
+        let mut options = vec![crate::distro_info::UNRELEASED.to_string()];
+        match crate::distro_info::get_ordered_series_name(&dist).await {
+            Ok(series_list) => {
+                options.extend(series_list);
+                // Default to the development series (the first real entry),
+                // not to the pinned UNRELEASED entry itself
+                let default = if options.len() > 1 {
+                    options[1].clone()
+                } else {
+                    current.clone()
+                };
+                Some(SeriesCandidates::Choose {
+                    options,
+                    default,
+                    fallback: current,
+                })
+            }
+            Err(_) => Some(SeriesCandidates::Keep(current)),
+        }
+    } else {
+        match crate::distro_info::get_dist_from_series(&current).await {
+            Ok(dist) => match crate::distro_info::get_ordered_series_name(&dist).await {
+                // Even an empty list goes through the selector: its
+                // fallback prints and takes the default, like it always has
+                Ok(options) => Some(SeriesCandidates::Choose {
+                    options,
+                    default: current.clone(),
+                    fallback: current,
+                }),
+                Err(_) => Some(SeriesCandidates::Keep(current)),
+            },
+            Err(_) => Some(SeriesCandidates::Keep(current)),
+        }
+    }
+}
+
 /// Parse a changelog file footer to extract maintainer information
 /// Returns (name, email) tuple from the last modification entry
 pub fn parse_changelog_footer(path: &Path) -> Result<(String, String), Box<dyn std::error::Error>> {
@@ -306,6 +397,82 @@ mod tests {
     use std::process::Command;
     use tempfile::TempDir;
 
+    /// An UNRELEASED changelog offers UNRELEASED pinned first, the
+    /// development series as the default, and itself as the fallback.
+    #[tokio::test]
+    async fn series_candidates_unreleased_pins_entry_and_defaults_to_dev() {
+        let dir = tempfile::tempdir().unwrap();
+        let path = dir.path().join("changelog");
+        std::fs::write(
+            &path,
+            "hello (1.0-1) UNRELEASED; urgency=medium\n\n  * Something.\n\n \
+             -- A B <a@b.c>  Mon, 01 Jan 2024 00:00:00 +0000\n",
+        )
+        .unwrap();
+
+        match series_candidates(&path).await {
+            Some(SeriesCandidates::Choose {
+                options,
+                default,
+                fallback,
+            }) => {
+                assert_eq!(options[0], "UNRELEASED");
+                assert!(options.len() > 1, "the vendor series list is offered");
+                assert_eq!(default, options[1]);
+                assert_eq!(fallback, "UNRELEASED");
+            }
+            other => panic!("expected Choose, got {other:?}"),
+        }
+    }
+
+    /// A released changelog offers its distribution's series with the
+    /// current one preselected. Uses a series of the host vendor so the
+    /// test only relies on the local distro-info data.
+    #[tokio::test]
+    async fn series_candidates_released_defaults_to_current_series() {
+        let dist = crate::build::env::current_vendor().to_lowercase();
+        let vendor_series = crate::distro_info::get_ordered_series_name(&dist)
+            .await
+            .expect("the host vendor's series data resolves");
+        // Any released series of the vendor works; the changelog names it.
+        let current = vendor_series.last().expect("non-empty series list");
+
+        let dir = tempfile::tempdir().unwrap();
+        let path = dir.path().join("changelog");
+        std::fs::write(
+            &path,
+            format!(
+                "hello (1.0-1) {current}; urgency=medium\n\n  * Something.\n\n \
+                 -- A B <a@b.c>  Mon, 01 Jan 2024 00:00:00 +0000\n"
+            ),
+        )
+        .unwrap();
+
+        match series_candidates(&path).await {
+            Some(SeriesCandidates::Choose {
+                options,
+                default,
+                fallback,
+            }) => {
+                assert_eq!(options, vendor_series);
+                assert_eq!(default, *current);
+                assert_eq!(fallback, *current);
+            }
+            other => panic!("expected Choose, got {other:?}"),
+        }
+    }
+
+    /// Without a parsable changelog there is no candidate at all.
+    #[tokio::test]
+    async fn series_candidates_none_without_changelog() {
+        let dir = tempfile::tempdir().unwrap();
+        assert!(
+            series_candidates(&dir.path().join("changelog"))
+                .await
+                .is_none()
+        );
+    }
+
     fn setup_repo(dir: &Path) {
         Command::new("git")
             .arg("init")

src/context/api.rs

@@ -117,6 +117,28 @@ pub enum ContextConfig {
     },
 }
 
+impl ContextConfig {
+    /// Build an SSH context configuration from an endpoint of the form
+    /// `[ssh://][user@]host[:port]`.
+    pub fn from_endpoint(endpoint: &str) -> Result<Self, String> {
+        let re = regex::Regex::new(
+            r"^(?:ssh://)?(?:(?P<user>[^@]+)@)?(?P<host>[^:/]+)(?::(?P<port>\d+))?$",
+        )
+        .expect("valid endpoint regex");
+        let cap = re.captures(endpoint).ok_or_else(|| {
+            format!("Invalid endpoint format: '{endpoint}'. Expected [ssh://][user@]host[:port]")
+        })?;
+        let host = cap.name("host").unwrap().as_str().to_string();
+        let user = cap.name("user").map(|m| m.as_str().to_string());
+        let port = cap
+            .name("port")
+            .map(|m| m.as_str().parse::<u16>())
+            .transpose()
+            .map_err(|_| "Invalid port number".to_string())?;
+        Ok(ContextConfig::Ssh { host, user, port })
+    }
+}
+
 /// A context, allowing to run commands, read and write files, etc
 pub struct Context {
     /// Configuration for the context
@@ -455,3 +477,57 @@ fn contextualize_spawn_error(program: &str, e: io::Error) -> io::Error {
         io::Error::new(e.kind(), format!("Could not run '{program}': {e}"))
     }
 }
+
+#[cfg(test)]
+mod endpoint_tests {
+    use super::*;
+
+    /// Every accepted endpoint spelling maps to the expected config.
+    #[test]
+    fn from_endpoint_parses_all_spellings() {
+        assert_eq!(
+            ContextConfig::from_endpoint("myhost"),
+            Ok(ContextConfig::Ssh {
+                host: "myhost".into(),
+                user: None,
+                port: None,
+            })
+        );
+        assert_eq!(
+            ContextConfig::from_endpoint("admin@myhost"),
+            Ok(ContextConfig::Ssh {
+                host: "myhost".into(),
+                user: Some("admin".into()),
+                port: None,
+            })
+        );
+        assert_eq!(
+            ContextConfig::from_endpoint("myhost:2222"),
+            Ok(ContextConfig::Ssh {
+                host: "myhost".into(),
+                user: None,
+                port: Some(2222),
+            })
+        );
+        assert_eq!(
+            ContextConfig::from_endpoint("ssh://admin@myhost:22"),
+            Ok(ContextConfig::Ssh {
+                host: "myhost".into(),
+                user: Some("admin".into()),
+                port: Some(22),
+            })
+        );
+    }
+
+    /// Non-numeric ports and extra segments are format errors; a
+    /// non-u16 numeric port is a port error.
+    #[test]
+    fn from_endpoint_rejects_malformed_endpoints() {
+        for bad in ["", "a/b/c", "host:notaport"] {
+            let err = ContextConfig::from_endpoint(bad).unwrap_err();
+            assert!(err.contains("Invalid endpoint format"), "{err}");
+        }
+        let err = ContextConfig::from_endpoint("host:99999").unwrap_err();
+        assert_eq!(err, "Invalid port number");
+    }
+}

src/deb/cross.rs

@@ -62,6 +62,20 @@ pub fn setup_environment(
         .map_err(|e| format!("Invalid UTF-8 in dpkg-architecture output: {e}"))?;
     parse_dpkg_architecture_output(&dpkg_architecture, env);
 
+    // In-tree tools locate their libraries with the *host* pkg-config during
+    // cross builds (the kernel's tools/build feature checks derive their
+    // cflags/ldflags from `pkg-config --cflags/--libs`), whose search path
+    // only covers the build architecture's pkgconfig dirs. Point it at the
+    // target's so `libtraceevent` & co resolve to target-arch libraries:
+    // linux-riscv cross builds die in rtla's Makefile.config otherwise, even
+    // with the target -dev packages installed.
+    if let Some(multiarch) = env.get("DEB_HOST_MULTIARCH").cloned() {
+        env.insert(
+            "PKG_CONFIG_LIBDIR".to_string(),
+            format!("/usr/lib/{multiarch}/pkgconfig:/usr/share/pkgconfig"),
+        );
+    }
+
     env.insert("DEB_BUILD_PROFILES".to_string(), "cross".to_string());
 
     Ok(())
@@ -289,4 +303,25 @@ mod tests {
         );
         assert!(cross_suites("noble", None, "not-a-distro").is_err());
     }
+
+    /// setup_environment exports the target multiarch pkg-config libdir:
+    /// tools' feature checks run the *host* pkg-config, which must find the
+    /// target's .pc files (rtla hard-errors on libtraceevent otherwise,
+    /// failing linux-riscv cross builds despite the target -dev packages
+    /// being installed).
+    #[test]
+    fn test_setup_environment_exports_cross_pkg_config_libdir() {
+        let mut env = HashMap::new();
+        let ctx = Arc::new(Context::new(crate::context::ContextConfig::Local).unwrap());
+        setup_environment(&mut env, "riscv64", ctx).unwrap();
+
+        assert_eq!(
+            env.get("PKG_CONFIG_LIBDIR").map(String::as_str),
+            Some("/usr/lib/riscv64-linux-gnu/pkgconfig:/usr/share/pkgconfig")
+        );
+        assert_eq!(
+            env.get("DEB_BUILD_PROFILES").map(String::as_str),
+            Some("cross")
+        );
+    }
 }

src/deb/ephemeral.rs

@@ -1,5 +1,6 @@
 use crate::context::{self, Context, ContextConfig};
-use crate::ui::deb::{DebUi, Phase};
+use crate::deb::{Phase, enter_phase};
+use crate::report::BuildView;
 use directories::ProjectDirs;
 use std::any::Any;
 use std::error::Error;
@@ -312,7 +313,7 @@ impl EphemeralContextGuard {
         series: &str,
         arch: Option<&str>,
         base_ctx: Arc<Context>,
-        ui: Option<Arc<DebUi>>,
+        view: &dyn BuildView,
     ) -> Result<Self, Box<dyn Error>> {
         // Save the globally-installed context so Drop can restore exactly
         // this handle: concurrent builds install their own ephemeral
@@ -355,7 +356,7 @@ impl EphemeralContextGuard {
 
         // Download and extract the chroot tarball
         if let Err(e) =
-            Self::download_and_extract_chroot(series, arch, &chroot_path, base_ctx.clone(), &ui)
+            Self::download_and_extract_chroot(series, arch, &chroot_path, base_ctx.clone(), view)
                 .await
         {
             // The guard (and its Drop) never materializes on this path, so
@@ -408,7 +409,7 @@ impl EphemeralContextGuard {
         arch: Option<&str>,
         chroot_path: &PathBuf,
         ctx: Arc<context::Context>,
-        ui: &Option<Arc<DebUi>>,
+        view: &dyn BuildView,
     ) -> Result<(), Box<dyn Error>> {
         // Clone ctx for use in create_device_nodes after download_chroot_tarball consumes it
         let ctx_for_devices = ctx.clone();
@@ -464,10 +465,8 @@ impl EphemeralContextGuard {
                 series,
                 arch
             );
-            if let Some(u) = ui {
+            enter_phase(view, Phase::PreparingChroot);
-                u.phase(Phase::PreparingChroot);
+            Self::download_chroot_tarball(series, arch, &tarball_path, ctx, view).await?;
-            }
-            Self::download_chroot_tarball(series, arch, &tarball_path, ctx, ui).await?;
         } else {
             log::debug!(
                 "Using cached chroot tarball for {} (arch: {:?})",
@@ -478,16 +477,12 @@ impl EphemeralContextGuard {
 
         // Extract tarball to chroot directory
         log::debug!("Extracting chroot tarball to {}...", chroot_path.display());
-        if let Some(u) = ui {
+        enter_phase(view, Phase::ExtractingChroot);
-            u.phase(Phase::ExtractingChroot);
+        Self::extract_tarball(&tarball_path, chroot_path, view)?;
-        }
-        Self::extract_tarball(&tarball_path, chroot_path, ui.as_deref())?;
 
         // Create device nodes in the chroot
         log::debug!("Creating device nodes in chroot...");
-        if let Some(u) = ui {
+        enter_phase(view, Phase::FinalizingChroot);
-            u.phase(Phase::FinalizingChroot);
-        }
         Self::create_device_nodes(chroot_path, ctx_for_devices.clone())?;
 
         // Bind mount /proc from host into chroot (before entering unshare namespace)
@@ -503,7 +498,7 @@ impl EphemeralContextGuard {
         arch: Option<&str>,
         tarball_path: &Path,
         ctx: Arc<context::Context>,
-        ui: &Option<Arc<DebUi>>,
+        view: &dyn BuildView,
     ) -> Result<(), Box<dyn Error>> {
         // Create a lock file to make sure that noone tries to use the file while it's not fully downloaded
         let lockfile_path = tarball_path.with_extension("lock");
@@ -537,8 +532,8 @@ impl EphemeralContextGuard {
         cmd.arg(series)
             .arg(tarball_path.to_string_lossy().to_string());
 
-        if let Some(u) = ui {
+        if let Some(s) = view.sink() {
-            cmd.capture(u.sink());
+            cmd.capture(s);
         }
 
         let status = cmd.status()?;
@@ -575,7 +570,7 @@ impl EphemeralContextGuard {
     fn extract_tarball(
         tarball_path: &PathBuf,
         chroot_path: &PathBuf,
-        ui: Option<&DebUi>,
+        view: &dyn BuildView,
     ) -> Result<(), Box<dyn Error>> {
         // Create the chroot directory
         fs::create_dir_all(chroot_path)?;
@@ -593,15 +588,11 @@ impl EphemeralContextGuard {
             let mut entry = entry?;
             entry.unpack_in(chroot_path)?;
             count += 1;
-            if count.is_multiple_of(100)
+            if count.is_multiple_of(100) {
-                && let Some(u) = ui
+                view.message(&format!("Extracting chroot… ({count} files)"));
-            {
-                u.progress_message(&format!("Extracting chroot… ({count} files)"));
             }
         }
-        if let Some(u) = ui {
+        view.message(&format!("Extracting chroot… ({count} files)"));
-            u.progress_message(&format!("Extracting chroot… ({count} files)"));
-        }
 
         Ok(())
     }

src/deb/local.rs

@@ -1,9 +1,9 @@
 /// Local binary package building
 /// Directly calling 'debian/rules' in current context
 use crate::context::{Context, ContextCommand, LineSink};
-use crate::deb::find_dsc_file;
+use crate::deb::{Phase, enter_phase, find_dsc_file};
-use crate::ui::deb::{DebUi, Phase};
+use crate::logfmt::QuiltClassifier;
-use crate::ui::logfmt::QuiltClassifier;
+use crate::report::BuildView;
 use log::warn;
 use std::collections::{BTreeMap, HashMap};
 use std::error::Error;
@@ -33,13 +33,13 @@ pub async fn build(
     pocket: Option<&str>,
     build_root: &str,
     cross: bool,
-    ppa: Option<&[&str]>,
+    ppa: &[String],
-    inject_packages: Option<&[&str]>,
+    inject_packages: &[String],
     ctx: Arc<Context>,
-    ui: Option<Arc<DebUi>>,
+    view: &dyn BuildView,
     jobs: Option<usize>,
 ) -> Result<Vec<PathBuf>, Box<dyn Error>> {
-    let sink: Option<Arc<dyn LineSink>> = ui.as_ref().map(|u| u.sink());
+    let sink: Option<Arc<dyn LineSink>> = view.sink();
 
     // Environment
     let mut env = HashMap::<String, String>::new();
@@ -83,12 +83,9 @@ pub async fn build(
     let mut added_ppas: Vec<(&str, &str)> = Vec::new();
 
     // Add PPA repositories if specified
-    if let Some(ppas) = ppa {
+    for ppa_str in ppa {
-        for ppa_str in ppas {
+        let (ppa_user, ppa_name) = crate::package_info::split_ppa(ppa_str)?;
-            // PPA format: user/ppa_name
+        let base_url = crate::package_info::ppa_to_base_url(ppa_user, ppa_name);
-            let parts: Vec<&str> = ppa_str.split('/').collect();
-            if parts.len() == 2 {
-                let base_url = crate::package_info::ppa_to_base_url(parts[0], parts[1]);
 
         // Add new PPA source if not found
         if !sources.iter().any(|s| s.uri.contains(&base_url)) {
@@ -119,7 +116,7 @@ pub async fn build(
             };
             sources.push(new_source);
             modified = true;
-                    added_ppas.push((parts[0], parts[1]));
+            added_ppas.push((ppa_user, ppa_name));
             log::info!(
                 "Added PPA: {} for series {} with architectures {:?}",
                 ppa_str,
@@ -127,12 +124,6 @@ pub async fn build(
                 architectures
             );
         }
-            } else {
-                return Err(
-                    format!("Invalid PPA format: '{}'. Expected: user/ppa_name", ppa_str).into(),
-                );
-            }
-        }
     }
 
     // UBUNTU: Ensure the 'universe' component is enabled on official
@@ -193,9 +184,7 @@ pub async fn build(
 
     // Update package lists
     log::debug!("Updating package lists for local build...");
-    if let Some(u) = &ui {
+    enter_phase(view, Phase::UpdatingPackageLists);
-        u.phase(Phase::UpdatingPackageLists);
-    }
     let status = cap(
         ctx.command("apt-get").envs(env.clone()).arg("update"),
         &sink,
@@ -234,9 +223,7 @@ pub async fn build(
         cmd.arg(format!("libc6:{arch}"));
         cmd.arg(format!("libc6-dev:{arch}"));
     }
-    if let Some(u) = &ui {
+    enter_phase(view, Phase::InstallingEssentials);
-        u.phase(Phase::InstallingEssentials);
-    }
     let status = cap(&mut cmd, &sink).status()?;
     if !status.success() {
         return Err("Could not install essential packages for the build".into());
@@ -261,18 +248,16 @@ pub async fn build(
     }
 
     // Apply quilt patches if the package provides a patch series
-    apply_quilt_patches(package_dir_str, &env, ctx.clone(), &ui, &sink)?;
+    apply_quilt_patches(package_dir_str, &env, ctx.clone(), view, &sink)?;
 
     // Install injected packages if specified
-    if let Some(packages) = inject_packages {
+    if !inject_packages.is_empty() {
-        install_injected_packages(packages, &env, ctx.clone(), &ui, &sink)?;
+        install_injected_packages(inject_packages, &env, ctx.clone(), view, &sink)?;
     }
 
     // Install arch-specific build dependencies
     log::debug!("Installing arch-specific build dependencies...");
-    if let Some(u) = &ui {
+    enter_phase(view, Phase::InstallingBuildDeps);
-        u.phase(Phase::InstallingBuildDeps);
-    }
     let mut cmd = ctx.command("apt-get");
     cmd.current_dir(package_dir_str)
         .envs(env.clone())
@@ -286,9 +271,7 @@ pub async fn build(
 
     // If build-dep fails, we try to explain the failure using dose-debcheck
     if !status.success() {
-        if let Some(u) = &ui {
+        view.suspend();
-            u.suspend();
-        }
         dose3_explain_dependencies(package, version, arch, build_root, cross, ctx.clone())?;
         return Err("Could not install build-dependencies for the build".into());
     }
@@ -320,9 +303,7 @@ pub async fn build(
 
         // If build-dep fails, we try to explain the failure using dose-debcheck
         if !status.success() {
-            if let Some(u) = &ui {
+            view.suspend();
-                u.suspend();
-            }
             dose3_explain_dependencies(package, version, arch, build_root, cross, ctx.clone())?;
             return Err("Could not install build-dependencies for the build".into());
         }
@@ -330,9 +311,7 @@ pub async fn build(
 
     // Run the build step
     log::debug!("Building (debian/rules build) package...");
-    if let Some(u) = &ui {
+    enter_phase(view, Phase::Building);
-        u.phase(Phase::Building);
-    }
     let status = cap(
         ctx.command("debian/rules")
             .current_dir(package_dir_str)
@@ -346,9 +325,7 @@ pub async fn build(
     }
 
     // Run the 'binary' step to produce deb
-    if let Some(u) = &ui {
+    enter_phase(view, Phase::ProducingBinaries);
-        u.phase(Phase::ProducingBinaries);
-    }
     let status = cap(
         ctx.command("fakeroot")
             .current_dir(package_dir_str)
@@ -495,7 +472,7 @@ fn apply_quilt_patches(
     package_dir: &str,
     env: &HashMap<String, String>,
     ctx: Arc<Context>,
-    ui: &Option<Arc<DebUi>>,
+    view: &dyn BuildView,
     sink: &Option<Arc<dyn LineSink>>,
 ) -> Result<(), Box<dyn Error>> {
     let series_path = Path::new(package_dir).join("debian/patches/series");
@@ -555,12 +532,10 @@ fn apply_quilt_patches(
     }
 
     // Apply all patches listed in the series
-    if let Some(u) = ui {
+    view.phase(
-        u.phase_with(
+        Phase::ApplyingPatches.label(),
-            Phase::ApplyingPatches,
         Box::new(QuiltClassifier::new(total_patches)),
     );
-    }
     let mut patch_env = env.clone();
     patch_env.insert("QUILT_PATCHES".to_string(), "debian/patches".to_string());
     let status = cap(
@@ -631,17 +606,15 @@ fn pin_pocket(pocket_suite: &str, ctx: &Arc<Context>) -> Result<(), Box<dyn Erro
 }
 
 fn install_injected_packages(
-    packages: &[&str],
+    packages: &[String],
     env: &HashMap<String, String>,
     ctx: Arc<Context>,
-    ui: &Option<Arc<DebUi>>,
+    view: &dyn BuildView,
     sink: &Option<Arc<dyn LineSink>>,
 ) -> Result<(), Box<dyn Error>> {
     log::info!("Installing injected packages: {:?}", packages);
 
-    if let Some(u) = ui {
+    enter_phase(view, Phase::InjectingPackages);
-        u.phase(Phase::InjectingPackages);
-    }
 
     // Separate .deb files from package names
     let mut deb_files: Vec<String> = Vec::new();
@@ -661,7 +634,7 @@ fn install_injected_packages(
             );
             deb_files.push(chroot_path.to_string_lossy().to_string());
         } else {
-            package_names.push(pkg);
+            package_names.push(pkg.as_str());
         }
     }
 
@@ -855,6 +828,13 @@ mod tests {
         )
         .unwrap();
 
-        apply_quilt_patches(tree.to_str().unwrap(), &HashMap::new(), ctx, &None, &None).unwrap();
+        apply_quilt_patches(
+            tree.to_str().unwrap(),
+            &HashMap::new(),
+            ctx,
+            &crate::report::Quiet,
+            &None,
+        )
+        .unwrap();
     }
 }

src/deb/mod.rs

@@ -5,7 +5,11 @@ pub(crate) mod ephemeral;
 mod local;
 
 use crate::context::{self, Context};
-use crate::ui::deb::{DebUi, Phase};
+use crate::logfmt::{
+    AptInstallClassifier, AptUpdateClassifier, Classifier, GenericClassifier, MakeClassifier,
+    MmdebstrapClassifier, QuiltClassifier,
+};
+use crate::report::{BuildTarget, BuildView};
 use std::error::Error;
 use std::path::{Path, PathBuf};
 use std::sync::Arc;
@@ -17,67 +21,163 @@ pub enum BuildMode {
     Local,
 }
 
+/// Phases of a binary build, announced to the [`BuildView`]
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub enum Phase {
+    /// Downloading the chroot tarball (mmdebstrap)
+    PreparingChroot,
+    /// Extracting the chroot tarball
+    ExtractingChroot,
+    /// Device nodes, /proc bind mount, etc.
+    FinalizingChroot,
+    /// apt-get update
+    UpdatingPackageLists,
+    /// Installing build-essential & co
+    InstallingEssentials,
+    /// quilt push -a
+    ApplyingPatches,
+    /// --inject packages
+    InjectingPackages,
+    /// apt-get build-dep
+    InstallingBuildDeps,
+    /// debian/rules build
+    Building,
+    /// fakeroot debian/rules binary
+    ProducingBinaries,
+    /// Retrieving produced .deb files
+    RetrievingArtifacts,
+}
+
+impl Phase {
+    /// Human-readable label displayed in the status bar
+    pub fn label(&self) -> &'static str {
+        match self {
+            Phase::PreparingChroot => "Preparing chroot",
+            Phase::ExtractingChroot => "Extracting chroot",
+            Phase::FinalizingChroot => "Finalizing chroot",
+            Phase::UpdatingPackageLists => "Updating package lists",
+            Phase::InstallingEssentials => "Installing essential packages",
+            Phase::ApplyingPatches => "Applying patches",
+            Phase::InjectingPackages => "Injecting packages",
+            Phase::InstallingBuildDeps => "Installing build dependencies",
+            Phase::Building => "Building package",
+            Phase::ProducingBinaries => "Producing binary packages",
+            Phase::RetrievingArtifacts => "Retrieving artifacts",
+        }
+    }
+}
+
+/// Default line classifier rewriting a phase's subprocess output
+fn default_classifier(phase: Phase) -> Box<dyn Classifier> {
+    match phase {
+        Phase::PreparingChroot => Box::new(MmdebstrapClassifier::new()),
+        Phase::ExtractingChroot | Phase::FinalizingChroot => Box::new(GenericClassifier::new()),
+        Phase::UpdatingPackageLists => Box::new(AptUpdateClassifier::new()),
+        Phase::InstallingEssentials => Box::new(AptInstallClassifier::new("Installing essentials")),
+        Phase::ApplyingPatches => Box::new(QuiltClassifier::new(0)),
+        Phase::InjectingPackages => Box::new(AptInstallClassifier::new("Injecting packages")),
+        Phase::InstallingBuildDeps => {
+            Box::new(AptInstallClassifier::new("Installing build dependencies"))
+        }
+        Phase::Building | Phase::ProducingBinaries => Box::new(MakeClassifier::new()),
+        Phase::RetrievingArtifacts => Box::new(GenericClassifier::new()),
+    }
+}
+
+/// Enter `phase` on the view with its default line classifier
+pub(crate) fn enter_phase(view: &dyn BuildView, phase: Phase) {
+    view.phase(phase.label(), default_classifier(phase));
+}
+
+/// Parameters of one [`build_binary_package`] call.
+pub struct DebBuildOptions<'a> {
+    /// Target architecture; defaults to the host architecture.
+    pub arch: Option<String>,
+    /// Target distribution series; defaults to the changelog series
+    /// (UNRELEASED resolves to the vendor's development series).
+    pub series: Option<String>,
+    /// Distribution pocket to resolve build-dependencies from.
+    pub pocket: Option<String>,
+    /// Source tree to build; defaults to the process working directory.
+    pub cwd: Option<PathBuf>,
+    /// Cross-compile for the target architecture instead of using
+    /// qemu-binfmt.
+    pub cross: bool,
+    /// Build mode; defaults to [`BuildMode::Local`].
+    pub mode: Option<BuildMode>,
+    /// PPAs to add for build-dependencies (`user/ppa_name`).
+    pub ppa: Vec<String>,
+    /// Packages to inject into the build environment before build-dep
+    /// (.deb paths, archive names or PPA packages).
+    pub inject: Vec<String>,
+    /// Parallel build jobs; defaults to the core count available in the
+    /// build context.
+    pub jobs: Option<usize>,
+    /// Explicit build context; defaults to the current context.
+    pub ctx: Option<Arc<Context>>,
+    /// Where build events (phases, progress, outcome) are reported.
+    pub view: &'a dyn BuildView,
+}
+
+impl Default for DebBuildOptions<'_> {
+    fn default() -> Self {
+        static QUIET: crate::report::Quiet = crate::report::Quiet;
+        DebBuildOptions {
+            arch: None,
+            series: None,
+            pocket: None,
+            cwd: None,
+            cross: false,
+            mode: None,
+            ppa: Vec::new(),
+            inject: Vec::new(),
+            jobs: None,
+            ctx: None,
+            view: &QUIET,
+        }
+    }
+}
+
 /// Build package in 'cwd' to a .deb
 ///
 /// Returns the list of produced artifacts (.deb files plus the upload
 /// metadata `.buildinfo`/`.changes`) retrieved locally, identified from
 /// `debian/files` and the native metadata generation rather than by
-/// globbing the build root (which would surface stale files). When `ui` is
+/// globbing the build root (which would surface stale files). Subprocess
-/// set, a live view (status bar + rolling log pane) is displayed and all
+/// output is captured through the view's sink (live view + tee log for the
-/// subprocess output is captured through it; on failure the widget is
+/// terminal adapter); on failure the view is cleared and prints a summary
-/// cleared and a summary of captured errors is printed.
+/// of captured errors.
-#[allow(clippy::too_many_arguments)]
 pub async fn build_binary_package(
-    arch: Option<&str>,
+    opts: DebBuildOptions<'_>,
-    series: Option<&str>,
-    pocket: Option<&str>,
-    cwd: Option<&Path>,
-    cross: bool,
-    mode: Option<BuildMode>,
-    ppa: Option<&[&str]>,
-    inject_packages: Option<&[&str]>,
-    ctx: Option<Arc<Context>>,
-    ui: Option<Arc<DebUi>>,
-    jobs: Option<usize>,
 ) -> Result<Vec<PathBuf>, Box<dyn Error>> {
-    let result = build_binary_package_impl(
+    let view = opts.view;
-        arch,
+    let result = build_binary_package_impl(opts).await;
-        series,
-        pocket,
-        cwd,
-        cross,
-        mode,
-        ppa,
-        inject_packages,
-        ctx,
-        &ui,
-        jobs,
-    )
-    .await;
 
-    if let (Some(u), Err(_)) = (&ui, &result) {
+    if result.is_err() {
-        u.finish_failure();
+        view.finish_failure();
     }
 
     result
 }
 
 /// Implementation of [`build_binary_package`], without failure handling
-#[allow(clippy::too_many_arguments)]
 async fn build_binary_package_impl(
-    arch: Option<&str>,
+    opts: DebBuildOptions<'_>,
-    series: Option<&str>,
-    pocket: Option<&str>,
-    cwd: Option<&Path>,
-    cross: bool,
-    mode: Option<BuildMode>,
-    ppa: Option<&[&str]>,
-    inject_packages: Option<&[&str]>,
-    ctx: Option<Arc<Context>>,
-    ui: &Option<Arc<DebUi>>,
-    jobs: Option<usize>,
 ) -> Result<Vec<PathBuf>, Box<dyn Error>> {
-    let cwd = cwd.unwrap_or_else(|| Path::new("."));
+    let DebBuildOptions {
+        ref arch,
+        ref series,
+        ref pocket,
+        ref cwd,
+        cross,
+        ref mode,
+        ref ppa,
+        ref inject,
+        ref jobs,
+        ref ctx,
+        view,
+    } = opts;
+    let cwd = cwd.as_deref().unwrap_or_else(|| Path::new("."));
 
     // Parse changelog to get package name, version and series
     let changelog_path = cwd.join("debian/changelog");
@@ -101,44 +201,45 @@ async fn build_binary_package_impl(
         &package_series
     };
     let current_arch = crate::get_current_arch();
-    let arch = arch.unwrap_or(&current_arch);
+    let arch = arch.as_deref().unwrap_or(&current_arch);
 
     // Make sure we select a specific mode, either using user-requested
     // or by using default for user-supplied parameters
-    let mode = if let Some(m) = mode {
+    let default_mode = BuildMode::Local;
-        m
+    let mode = mode.as_ref().unwrap_or(&default_mode);
-    } else {
-        // By default, we use local build
-        BuildMode::Local
-    };
 
     // Create an ephemeral unshare context for all Local builds
     // Use qemu_binfmt when target architecture differs from host and cross is not requested
-    let chroot_arch = if mode == BuildMode::Local && arch != current_arch && !cross {
+    let chroot_arch = if mode == &BuildMode::Local && arch != current_arch && !cross {
         Some(arch)
     } else {
         None
     };
 
     // Use provided context or get current
-    let base_ctx = ctx.unwrap_or_else(context::current);
+    let base_ctx = ctx.clone().unwrap_or_else(context::current);
 
-    // Identify the target in the live UI once the changelog is parsed, so
+    // Identify the target in the live view once the changelog is parsed, so
     // even the chroot download output is attributed and tee'd
-    if let Some(u) = ui {
+    view.target(BuildTarget {
-        u.set_target(&package, &version, series, arch);
+        package: &package,
-    }
+        version: &version,
+        target: &format!("{series}/{arch}"),
+        display: format!("Building {package} ({version}) for {series}/{arch}"),
+        source_only: false,
+        tee_log: true,
+    });
 
     // Create an ephemeral unshare context for all Local builds. It is kept in
     // this scope so it outlives the guarded section below and is only dropped
     // once the live view has been cleared.
-    let mut guard = if mode == BuildMode::Local {
+    let mut guard = if *mode == BuildMode::Local {
         Some(
             ephemeral::EphemeralContextGuard::new_with_context(
                 series,
                 chroot_arch,
                 base_ctx.clone(),
-                ui.clone(),
+                view,
             )
             .await?,
         )
@@ -179,14 +280,14 @@ async fn build_binary_package_impl(
                     &version,
                     arch,
                     series,
-                    pocket,
+                    pocket.as_deref(),
                     &build_root,
                     cross,
                     ppa,
-                    inject_packages,
+                    inject,
                     build_ctx.clone(),
-                    ui.clone(),
+                    view,
-                    jobs,
+                    *jobs,
                 )
                 .await?
             }
@@ -194,9 +295,7 @@ async fn build_binary_package_impl(
 
         // Retrieve the produced artifacts (binary packages plus the upload
         // metadata) to the parent directory.
-        if let Some(u) = ui {
+        enter_phase(view, Phase::RetrievingArtifacts);
-            u.phase(Phase::RetrievingArtifacts);
-        }
         let total_debs = remote_files.len();
 
         let mut artifacts = Vec::with_capacity(total_debs);
@@ -206,14 +305,10 @@ async fn build_binary_package_impl(
             build_ctx.retrieve_path(remote_file, &local_dest)?;
             artifacts.push(local_dest);
 
-            if let Some(u) = ui {
+            view.progress("Retrieving artifacts", idx + 1, total_debs);
-                u.count_progress("Retrieving artifacts", idx + 1, total_debs);
-            }
         }
 
-        if let Some(u) = ui {
+        view.finish_success(&artifacts);
-            u.finish_success(&artifacts, u.elapsed());
-        }
 
         Ok(artifacts)
     }
@@ -222,9 +317,7 @@ async fn build_binary_package_impl(
     // Clear the live view before returning: the ephemeral guard is dropped at
     // the end of this function and its cleanup commands (umount, rm -rf of
     // the chroot) inherit the terminal, so they must not fight the widget.
-    if let Some(u) = ui {
+    view.suspend();
-        u.suspend();
-    }
 
     // Mark build as successful to trigger chroot cleanup
     if result.is_ok()
@@ -446,19 +539,14 @@ mod tests {
         log::debug!("Package directory: {}", cwd.display());
 
         log::info!("Starting binary package build...");
-        crate::deb::build_binary_package(
+        crate::deb::build_binary_package(DebBuildOptions {
-            arch,
+            arch: arch.map(str::to_string),
-            Some(series),
+            series: Some(series.to_string()),
-            None,
-            Some(&cwd),
             cross,
-            None,
+            cwd: Some(cwd.to_path_buf()),
-            None,
+            ctx: Some(ctx),
-            None,
+            ..Default::default()
-            Some(ctx),
+        })
-            None,
-            None,
-        )
         .await
         .expect("Cannot build binary package (deb)");
         log::info!("Successfully built binary package");
@@ -620,19 +708,14 @@ mod tests {
 
         let ctx = Arc::new(Context::new(crate::context::ContextConfig::Local).unwrap());
 
-        crate::deb::build_binary_package(
+        crate::deb::build_binary_package(DebBuildOptions {
-            Some("arm64"),
+            arch: Some("arm64".to_string()),
-            Some("noble"),
+            series: Some("noble".to_string()),
-            None,
+            cwd: Some(pkg_dir),
-            Some(&pkg_dir),
+            cross: true,
-            true,
+            ctx: Some(ctx),
-            None,
+            ..Default::default()
-            None,
+        })
-            None,
-            Some(ctx),
-            None,
-            None,
-        )
         .await
         .expect("Cannot cross-build package declaring Build-Depends-Indep");
 

src/lib.rs

@@ -34,6 +34,15 @@ pub mod put;
 /// Handle package-specific quirks and workarounds
 pub mod quirks;
 
+/// Line classifiers rewriting raw subprocess output into display actions
+/// and countable progress (pure logic, shared by build views)
+pub mod logfmt;
+
+/// Reporting ports: environment-agnostic build observation ([`BuildView`])
+/// and question answering ([`Prompter`]), implemented by terminal views,
+/// server bridges or the inert [`Quiet`]
+pub mod report;
+
 /// Terminal UI helpers (progress bars, live build views, prompts)
 pub mod ui;
 

src/main.rs

@@ -321,10 +321,14 @@ fn main() {
             // the structural self-checks inside `scaffold` always run), with
             // the scaffold outcome (e.g. a failed vendoring) shaping the
             // offer.
+            let prompter = pkh::ui::prompt::TerminalPrompter;
             if let Err(e) = rt.block_on(async {
-                let opts = pkh::new::questions::run(cli).await?;
+                let opts = pkh::new::questions::run(cli, &prompter).await?;
                 let outcome = pkh::new::scaffold(opts.clone(), &multi)?;
-                pkh::new::questions::offer_verification(&opts, &outcome, &multi, no_verify).await;
+                pkh::new::questions::offer_verification(
+                    &opts, &outcome, &multi, no_verify, &prompter,
+                )
+                .await;
                 Ok::<(), Box<dyn std::error::Error>>(())
             }) {
                 error!("{}", e);
@@ -349,15 +353,14 @@ fn main() {
             let (pb, progress_callback) = pkh::ui::create_progress_bar(&multi);
 
             // Convert PPA to base URL if provided
-            let base_url = ppa.map(|ppa_str| {
+            let base_url = match ppa.map(pkh::package_info::split_ppa) {
-                // PPA format: user/ppa_name
+                Some(Ok((user, name))) => Some(pkh::package_info::ppa_to_base_url(user, name)),
-                let parts: Vec<&str> = ppa_str.split('/').collect();
+                Some(Err(e)) => {
-                if parts.len() != 2 || parts[0].is_empty() || parts[1].is_empty() {
+                    error!("{e}");
-                    error!("Invalid PPA format: '{}'. Expected: user/ppa_name", ppa_str);
                     std::process::exit(1);
                 }
-                pkh::package_info::ppa_to_base_url(parts[0], parts[1])
+                None => None,
-            });
+            };
 
             // Since pull is async, we need to block on it
             if let Err(e) = rt.block_on(async {
@@ -391,74 +394,47 @@ fn main() {
             let target_series = if let Some(s) = cli_series {
                 Some(s.to_string())
             } else {
-                // Parse current changelog to determine the default series
                 let changelog_path = cwd.join("debian/changelog");
-                match pkh::changelog::parse_changelog_header(&changelog_path) {
+                match rt.block_on(pkh::changelog::series_candidates(&changelog_path)) {
-                    Ok((_pkg, _ver, current_series)) => {
+                    Some(pkh::changelog::SeriesCandidates::Choose {
-                        // UNRELEASED is not a real series: offer it as a
+                        options,
-                        // pinned first entry (selecting it keeps the changelog
+                        default,
-                        // unreleased) on top of the current vendor's series
+                        fallback,
-                        // list, defaulting to the development series. Any
+                    }) => match pkh::ui::select_series(&options, &default) {
-                        // other series resolves through the series list of
-                        // its own distribution.
-                        match rt.block_on(async {
-                            if pkh::distro_info::is_unreleased(&current_series) {
-                                // Vendors keep original casing ("Ubuntu"),
-                                // while the series data keys are lowercase
-                                let dist = pkh::build::env::current_vendor().to_lowercase();
-                                let mut series_list =
-                                    vec![pkh::distro_info::UNRELEASED.to_string()];
-                                series_list.extend(
-                                    pkh::distro_info::get_ordered_series_name(&dist).await?,
-                                );
-                                Ok(series_list)
-                            } else {
-                                let dist =
-                                    pkh::distro_info::get_dist_from_series(&current_series).await?;
-                                pkh::distro_info::get_ordered_series_name(&dist).await
-                            }
-                        }) {
-                            Ok(series_list) => {
-                                // Default to the development series (the
-                                // first real entry) when the changelog is
-                                // UNRELEASED, not to the pinned entry itself
-                                let default = if pkh::distro_info::is_unreleased(&current_series)
-                                    && series_list.len() > 1
-                                {
-                                    series_list[1].clone()
-                                } else {
-                                    current_series.clone()
-                                };
-                                match pkh::ui::select_series(&series_list, &default) {
                         Ok(selected) => Some(selected),
                         Err(e) => {
                             error!(
                                 "Series selection failed: {}. Using current series '{}' instead.",
-                                            e, current_series
+                                e, fallback
                             );
-                                        Some(current_series)
+                            Some(fallback)
                         }
-                                }
+                    },
-                            }
+                    // Could not fetch the series list: use the current series
-                            Err(_) => {
+                    Some(pkh::changelog::SeriesCandidates::Keep(current)) => Some(current),
-                                // Could not fetch series list, use current series as default
+                    // No parsable changelog: leave the series decision to
-                                Some(current_series)
+                    // generate_entry
-                            }
+                    None => None,
-                        }
-                    }
-                    Err(_) => None,
                 }
             };
 
-            if let Err(e) = generate_entry(
+            let entry = match generate_entry(
                 "debian/changelog",
                 Some(&cwd),
                 version,
                 target_series.as_deref(),
             ) {
+                Ok(entry) => entry,
+                Err(e) => {
                     error!("{}", e);
                     std::process::exit(1);
                 }
+            };
+            println!(
+                "Found package: {}, version: {}",
+                entry.package, entry.previous_version
+            );
+            println!("Added new changelog entry to {}", entry.path.display());
 
             let editor = match std::env::var("EDITOR") {
                 Ok(e) => e,
@@ -490,13 +466,19 @@ fn main() {
                 .copied()
                 .unwrap_or(false);
 
-            // Live build view: disabled by --verbose or when stdout is not a
+            // Live build view, unless --verbose (DebUi additionally disables
-            // terminal (DebUi handles the non-TTY case itself)
+            // itself when stdout is not a terminal)
-            let ui = if verbose {
+            let quiet = pkh::report::Quiet;
+            let live = if verbose {
                 None
             } else {
-                Some(std::sync::Arc::new(pkh::ui::deb::DebUi::new(&multi)))
+                Some(pkh::ui::deb::DebUi::new(&multi))
             };
+            let view: &dyn pkh::report::BuildView = live
+                .as_ref()
+                .map(|v| v as &dyn pkh::report::BuildView)
+                .unwrap_or(&quiet);
+            let prompter = pkh::ui::prompt::TerminalPrompter;
 
             let orig_source = match sub_matches.get_one::<String>("orig").map(String::as_str) {
                 Some("always") => pkh::build::OrigSourceMode::Always,
@@ -504,14 +486,38 @@ fn main() {
                 _ => pkh::build::OrigSourceMode::Auto,
             };
 
-            if let Err(e) = pkh::build::build_source_package(
+            match pkh::build::build_source_package(pkh::build::BuildSourceOptions {
-                Some(&cwd),
+                source: Some(cwd),
-                pkh::build::SourceBuildOptions {
+                options: pkh::build::SourceBuildOptions {
                     orig_source,
                     ..Default::default()
                 },
-                ui,
+                view,
-            ) {
+                prompter: &prompter,
+            }) {
+                Ok(output) => {
+                    // The live view lists the artifacts itself when it
+                    // renders; otherwise (verbose mode or non-TTY stdout)
+                    // print them as plain lines.
+                    if !view.is_enabled() {
+                        for artifact in output.artifacts() {
+                            println!("  {}", pkh::report::display_path(&artifact));
+                        }
+                    }
+                    if output.signed {
+                        println!("Package built and signed successfully!");
+                    } else {
+                        println!("Package built successfully (unsigned).");
+                    }
+                }
+                Err(e) => {
+                    // The unmet-dependency diagnostics first, then the
+                    // summary: the exact rendering the flow used to do.
+                    if let Some(unmet) =
+                        e.downcast_ref::<pkh::debian::deps::UnmetBuildDependencies>()
+                    {
+                        eprintln!("{}", unmet.0.message());
+                    }
                     error!("{}", e);
                     // Unmet build dependencies/conflicts exit with status 3,
                     // like dpkg-buildpackage does.
@@ -523,6 +529,7 @@ fn main() {
                     std::process::exit(1);
                 }
             }
+        }
         Some(("put", sub_matches)) => {
             let cwd = current_dir_or_exit();
             let ppa = sub_matches.get_one::<String>("ppa").map(|s| s.as_str());
@@ -543,41 +550,38 @@ fn main() {
                 std::process::exit(1);
             };
 
+            let view = pkh::ui::deb::DebUi::new(&multi);
+            let prompter = pkh::ui::prompt::TerminalPrompter;
             let options = pkh::put::PutOptions {
                 ppa: ppa.to_string(),
                 changes,
                 force,
                 cwd,
+                view: &view,
+                prompter: &prompter,
             };
-            if let Err(e) = rt.block_on(async { pkh::put::put(&options, &multi).await }) {
+            if let Err(e) = rt.block_on(async { pkh::put::put(&options).await }) {
                 error!("{}", e);
                 std::process::exit(1);
             }
         }
         Some(("deb", sub_matches)) => {
             let cwd = current_dir_or_exit();
-            let series = sub_matches.get_one::<String>("series").map(|s| s.as_str());
+            let series = sub_matches.get_one::<String>("series").cloned();
-            let pocket = sub_matches.get_one::<String>("pocket").map(|s| s.as_str());
+            let pocket = sub_matches.get_one::<String>("pocket").cloned();
-            let arch = sub_matches.get_one::<String>("arch").map(|s| s.as_str());
+            let arch = sub_matches.get_one::<String>("arch").cloned();
-            let cross = sub_matches.get_one::<bool>("cross").unwrap_or(&false);
+            let cross = sub_matches
-            let ppa: Vec<&str> = sub_matches
+                .get_one::<bool>("cross")
+                .copied()
+                .unwrap_or(false);
+            let ppa: Vec<String> = sub_matches
                 .get_many::<String>("ppa")
-                .map(|v| v.map(|s| s.as_str()).collect())
+                .map(|v| v.cloned().collect())
                 .unwrap_or_default();
-            let ppa = if ppa.is_empty() {
+            let inject: Vec<String> = sub_matches
-                None
-            } else {
-                Some(ppa.as_slice())
-            };
-            let inject_packages: Vec<&str> = sub_matches
                 .get_many::<String>("inject")
-                .map(|v| v.map(|s| s.as_str()).collect())
+                .map(|v| v.cloned().collect())
                 .unwrap_or_default();
-            let inject_packages = if inject_packages.is_empty() {
-                None
-            } else {
-                Some(inject_packages.as_slice())
-            };
             let mode: Option<&str> = sub_matches.get_one::<String>("mode").map(|s| s.as_str());
             let mode: Option<pkh::deb::BuildMode> = match mode {
                 Some("local") => Some(pkh::deb::BuildMode::Local),
@@ -596,36 +600,38 @@ fn main() {
                 })
             });
 
-            // Live build view: disabled by --verbose or when stdout is not a
+            // Live build view, unless --verbose (DebUi additionally disables
-            // terminal (DebUi handles the non-TTY case itself)
+            // itself when stdout is not a terminal)
-            let ui = if verbose {
+            let quiet = pkh::report::Quiet;
+            let live = if verbose {
                 None
             } else {
-                Some(std::sync::Arc::new(pkh::ui::deb::DebUi::new(&multi)))
+                Some(pkh::ui::deb::DebUi::new(&multi))
             };
+            let view: &dyn pkh::report::BuildView = live
+                .as_ref()
+                .map(|v| v as &dyn pkh::report::BuildView)
+                .unwrap_or(&quiet);
 
             let result = rt.block_on(async {
-                pkh::deb::build_binary_package(
+                pkh::deb::build_binary_package(pkh::deb::DebBuildOptions {
                     arch,
                     series,
                     pocket,
-                    Some(cwd.as_path()),
+                    cwd: Some(cwd.clone()),
-                    *cross,
+                    cross,
                     mode,
                     ppa,
-                    inject_packages,
+                    inject,
-                    None,
-                    ui.clone(),
                     jobs,
-                )
+                    view,
+                    ..Default::default()
+                })
                 .await
             });
 
             match result {
-                Ok(artifacts) => {
+                Ok(_) => info!("Done."),
-                    let _ = artifacts;
-                    info!("Done.");
-                }
                 Err(e) => {
                     error!("{}", e);
                     std::process::exit(1);
@@ -655,24 +661,13 @@ fn main() {
                                     std::process::exit(1);
                                 });
 
-                            // Parse host, user, port from endpoint
+                            match pkh::context::ContextConfig::from_endpoint(endpoint) {
-                            // Formats: [ssh://][user@]host[:port]
+                                Ok(config) => config,
-                            let endpoint_re = regex::Regex::new(r"^(?:ssh://)?(?:(?P<user>[^@]+)@)?(?P<host>[^:/]+)(?::(?P<port>\d+))?$").unwrap();
+                                Err(e) => {
-                            let endpoint_cap = endpoint_re.captures(endpoint).unwrap_or_else(|| {
+                                    error!("{e}");
-                                error!("Invalid endpoint format: '{}'. Expected [ssh://][user@]host[:port]", endpoint);
                                     std::process::exit(1);
-                            });
+                                }
-
+                            }
-                            let host = endpoint_cap.name("host").unwrap().as_str().to_string();
-                            let user = endpoint_cap.name("user").map(|m| m.as_str().to_string());
-                            let port = endpoint_cap.name("port").map(|m| {
-                                m.as_str().parse::<u16>().unwrap_or_else(|_| {
-                                    error!("Invalid port number");
-                                    std::process::exit(1);
-                                })
-                            });
-
-                            ContextConfig::Ssh { host, user, port }
                         }
                         _ => {
                             error!("Unknown context type: {}", type_str);

src/new/debian.rs

@@ -436,7 +436,7 @@ pub fn create_orig_tarball_excluding(
 
     log::info!(
         "Created orig tarball {}",
-        crate::ui::display_path(&tarball_path)
+        crate::report::display_path(&tarball_path)
     );
     Ok(tarball_path)
 }

src/new/mod.rs

@@ -251,7 +251,7 @@ fn print_success(opts: &NewOptions, outcome: &ScaffoldOutcome) {
     // `display_path` yields an empty string when the target is the cwd
     // itself (Here mode): `Created .` would be cryptic, so spell the
     // location out; the skeleton/path modes keep the `<dir>` display.
-    let display = crate::ui::display_path(&target);
+    let display = crate::report::display_path(&target);
     let location = if display.is_empty() {
         "package in the current directory".to_string()
     } else {
@@ -819,7 +819,7 @@ mod tests {
         let output = crate::build::run_source_build(
             &source,
             &crate::build::SourceBuildOptions::default(),
-            None,
+            &crate::report::Quiet,
         )
         .unwrap();
         let dsc = std::fs::read_to_string(&output.dsc).unwrap();
@@ -885,7 +885,7 @@ mod tests {
         let output = crate::build::run_source_build(
             &dir.path().join("mytool"),
             &crate::build::SourceBuildOptions::default(),
-            None,
+            &crate::report::Quiet,
         )
         .unwrap();
 
@@ -916,7 +916,7 @@ mod tests {
         let output = crate::build::run_source_build(
             &dir.path().join("mytool"),
             &crate::build::SourceBuildOptions::default(),
-            None,
+            &crate::report::Quiet,
         )
         .unwrap();
         assert!(output.dsc.exists(), "{:?} missing", output.dsc);

src/new/orig.rs

@@ -183,7 +183,7 @@ pub fn create_vendor_component(
 
     log::info!(
         "Created vendored-dependencies component {}",
-        crate::ui::display_path(&component_path)
+        crate::report::display_path(&component_path)
     );
     Ok(component_path)
 }
@@ -283,7 +283,7 @@ fn git_archive_tarball(
 
     log::info!(
         "Created orig tarball from git archive of {tag}: {}",
-        crate::ui::display_path(&dest)
+        crate::report::display_path(&dest)
     );
     Ok(dest)
 }
@@ -311,7 +311,7 @@ fn download_release(
                     Ok(path) => {
                         log::info!(
                             "Created orig tarball from the release download of {tag}: {}",
-                            crate::ui::display_path(&path)
+                            crate::report::display_path(&path)
                         );
                         Ok(path)
                     }
@@ -352,7 +352,7 @@ fn fetch_and_repack(
     log::info!(
         "Created orig tarball from {}: {}",
         source,
-        crate::ui::display_path(&dest)
+        crate::report::display_path(&dest)
     );
     Ok(dest)
 }

src/new/questions.rs

@@ -1,11 +1,11 @@
 //! The `pkh new` interactive wizard.
 //!
-//! [`run`] is the single entry point: on an interactive terminal it asks the
+//! [`run`] is the single entry point: when the prompter can interact it asks
-//! questions of the spec's "Proposed UX" transcript, fills a
+//! the questions of the spec's "Proposed UX" transcript, fills a
 //! [`NewCli`] with the answers (explicit flags are never re-asked), and
 //! reuses [`options::resolve`] as the single source of truth for defaults,
 //! detection and validation — so the non-interactive and interactive paths
-//! cannot drift apart. Without a terminal (or with `--defaults`) it goes
+//! cannot drift apart. Headless (or with `--defaults`) it goes
 //! straight through [`options::resolve`], whose error lists every missing
 //! answer.
 //!
@@ -13,11 +13,10 @@
 //! verification builds of the spec ([`offer_verification`]); a failed
 //! verification never undoes the scaffold.
 //!
-//! The prompt calls live in `run_wizard` and `offer_verification` only;
+//! The prompter calls live in `run_wizard` and `offer_verification` only;
 //! everything else in this module is pure and unit-tested.
 
 use std::error::Error;
-use std::io::IsTerminal;
 use std::path::PathBuf;
 
 use indicatif::MultiProgress;
@@ -28,7 +27,7 @@ use crate::new::licenses;
 use crate::new::options::{self, NewCli, NewOptions, SourceDir, SourceFormat, TemplateId};
 use crate::new::origin::GitOrigin;
 use crate::new::templates::{self, ProbeResult, ScaffoldOutcome};
-use crate::ui::prompt;
+use crate::report::{Prompter, Validator};
 
 /// Answer of the "where is the source code?" question: fresh skeleton.
 const SOURCE_SKELETON: &str = "Create a new project skeleton here";
@@ -40,8 +39,8 @@ const SOURCE_PATH: &str = "Package the sources in another directory…";
 /// The "everything else" entry of the license menu.
 const LICENSE_OTHER: &str = "Other (enter a SPDX identifier)";
 
-/// Labels of the interactive `select` questions. `prompt::select` renders
+/// Labels of the interactive `select` questions. The prompter renders
-/// `> <label><answer>` verbatim — unlike [`prompt::text`], it appends no
+/// `> <label><answer>` verbatim — unlike [`Prompter::text`], it appends no
 /// formatting of its own — so each label carries its own separator:
 /// field-style prompts end with `": "`, question-style ones with `"? "`.
 const LANGUAGE_LABEL: &str = "Which language/build system is your program using? ";
@@ -62,20 +61,13 @@ const SELECT_LABELS: [&str; 6] = [
     ORIG_LABEL,
 ];
 
-/// Run the `pkh new` flow: the wizard on an interactive terminal, plain
+/// Run the `pkh new` flow: the wizard when the prompter can interact,
-/// [`options::resolve`] otherwise (and with `--defaults`).
+/// plain [`options::resolve`] otherwise (and with `--defaults`).
-pub async fn run(cli: NewCli) -> Result<NewOptions, Box<dyn Error>> {
+pub async fn run(cli: NewCli, prompter: &dyn Prompter) -> Result<NewOptions, Box<dyn Error>> {
-    if cli.defaults || !is_interactive() {
+    if cli.defaults || !prompter.interactive() {
         return Ok(options::resolve(cli).await?);
     }
-    run_wizard(cli).await
+    run_wizard(cli, prompter).await
-}
-
-/// Whether both ends of the terminal are interactive; the wizard and the
-/// verification offers only run when this holds (the prompts' non-TTY
-/// fallbacks would otherwise silently take defaults).
-fn is_interactive() -> bool {
-    std::io::stdin().is_terminal() && std::io::stdout().is_terminal()
 }
 
 /// The wizard question flow (spec "Proposed UX"), in order:
@@ -87,7 +79,10 @@ fn is_interactive() -> bool {
 /// (`empty` template only), git init — then the summary screen and the
 /// final `Generate?` confirmation. Every question with an explicit flag
 /// answer is skipped (flag > detected/probe > default merge order).
-async fn run_wizard(mut cli: NewCli) -> Result<NewOptions, Box<dyn Error>> {
+async fn run_wizard(
+    mut cli: NewCli,
+    prompter: &dyn Prompter,
+) -> Result<NewOptions, Box<dyn Error>> {
     let cwd = std::env::current_dir()?;
     let mut detect_dir = cli.source.clone().unwrap_or_else(|| cwd.clone());
     let (detection, mut probe) = detect_and_probe(&detect_dir);
@@ -101,7 +96,12 @@ async fn run_wizard(mut cli: NewCli) -> Result<NewOptions, Box<dyn Error>> {
     //    basename of the current directory.
     if cli.name.is_none() {
         let default = default_package_name(&cwd, probe.as_ref());
-        let answer = ask_text("Package name", &default, options::validate_source_name)?;
+        let answer = ask_text(
+            prompter,
+            "Package name",
+            &default,
+            options::validate_source_name,
+        )?;
         cli.name = Some(answer);
     }
 
@@ -142,7 +142,7 @@ async fn run_wizard(mut cli: NewCli) -> Result<NewOptions, Box<dyn Error>> {
                 .unwrap_or(TemplateId::EMPTY)
                 .display_name()
                 .to_string();
-            let id = select_template(&menu, &default)?;
+            let id = select_template(prompter, &menu, &default)?;
             cli.lang = Some(id.as_str().to_string());
         }
         LanguageChoice::Ambiguous(candidates) => {
@@ -157,7 +157,7 @@ async fn run_wizard(mut cli: NewCli) -> Result<NewOptions, Box<dyn Error>> {
                     .join(", ")
             );
             let menu = language_menu(&candidates);
-            let id = select_template(&menu, &menu[0])?;
+            let id = select_template(prompter, &menu, &menu[0])?;
             cli.lang = Some(id.as_str().to_string());
         }
     }
@@ -193,14 +193,14 @@ async fn run_wizard(mut cli: NewCli) -> Result<NewOptions, Box<dyn Error>> {
         } else {
             SOURCE_HERE
         };
-        let answer = select_from(SOURCE_LABEL, &options, default, |answer| {
+        let answer = select_from(prompter, SOURCE_LABEL, &options, default, |answer| {
             options.contains(&answer.to_string())
         })?;
         if answer == SOURCE_HERE {
             cli.source = Some(cwd.clone());
         } else if answer == SOURCE_PATH {
             let validator = |path: &str| validate_directory_answer(path);
-            let path = prompt::text("Source directory", "", Some(&validator))?;
+            let path = prompter.text("Source directory", "", Some(&validator))?;
             cli.source = Some(PathBuf::from(path));
         }
         // SOURCE_SKELETON: cli.source stays unset (the name decides).
@@ -266,7 +266,7 @@ async fn run_wizard(mut cli: NewCli) -> Result<NewOptions, Box<dyn Error>> {
             .unwrap_or_else(|| "0.1.0".to_string());
         let revision = cli.revision.unwrap_or(1);
         let validate = move |version: &str| options::validate_upstream_version(version, revision);
-        let answer = ask_text("Upstream version", &default, validate)?;
+        let answer = ask_text(prompter, "Upstream version", &default, validate)?;
         cli.upstream_version = Some(answer.clone());
 
         // The typed version names an existing tag HEAD is not on: offer to
@@ -279,7 +279,7 @@ async fn run_wizard(mut cli: NewCli) -> Result<NewOptions, Box<dyn Error>> {
                 "Version {answer} matches tag {tag}, but HEAD is not that \
                  tag. Check out {tag} now?"
             );
-            if prompt::confirm(&question, false)? {
+            if prompter.confirm(&question, false)? {
                 let dir = packaged_dir.as_deref().expect("origin implies a directory");
                 crate::new::origin::checkout_tag(dir, tag)?;
                 log::info!(
@@ -311,7 +311,7 @@ async fn run_wizard(mut cli: NewCli) -> Result<NewOptions, Box<dyn Error>> {
         } else {
             "Snapshot this working tree".to_string()
         };
-        let answer = select_from(ORIG_LABEL, &labels, &default, |answer| {
+        let answer = select_from(prompter, ORIG_LABEL, &labels, &default, |answer| {
             labels.contains(&answer.to_string())
         })?;
         let chosen = choices
@@ -322,14 +322,14 @@ async fn run_wizard(mut cli: NewCli) -> Result<NewOptions, Box<dyn Error>> {
         cli.orig_from = Some(chosen.to_string());
         if chosen == "path" {
             let validator = |path: &str| options::validate_orig_path(path);
-            let path = prompt::text("Tarball path or URL", "", Some(&validator))?;
+            let path = prompter.text("Tarball path or URL", "", Some(&validator))?;
             cli.orig_path = Some(path);
         }
     }
 
     // 5. Debian revision.
     if cli.revision.is_none() {
-        let answer = ask_text("Debian revision", "1", validate_revision_answer)?;
+        let answer = ask_text(prompter, "Debian revision", "1", validate_revision_answer)?;
         cli.revision = answer.parse::<u32>().ok();
     }
 
@@ -340,7 +340,7 @@ async fn run_wizard(mut cli: NewCli) -> Result<NewOptions, Box<dyn Error>> {
             .and_then(|p| p.description.clone())
             .unwrap_or_default();
         let validate = required_answer("the description");
-        let answer = ask_text("One-line description", &default, validate)?;
+        let answer = ask_text(prompter, "One-line description", &default, validate)?;
         cli.description = Some(answer);
     }
 
@@ -357,7 +357,7 @@ async fn run_wizard(mut cli: NewCli) -> Result<NewOptions, Box<dyn Error>> {
                 options::validate_homepage(url)
             }
         };
-        let answer = ask_text("Homepage (blank to skip)", &default, validate)?;
+        let answer = ask_text(prompter, "Homepage (blank to skip)", &default, validate)?;
         if !answer.is_empty() {
             cli.homepage = Some(answer);
         }
@@ -373,12 +373,17 @@ async fn run_wizard(mut cli: NewCli) -> Result<NewOptions, Box<dyn Error>> {
             .or_else(|| detect::sniff_license(&detect_dir));
         let (default, custom_default) = license_question_default(detected.as_deref());
         let options = license_menu();
-        let answer = select_from(LICENSE_LABEL, &options, &default, |answer| {
+        let answer = select_from(prompter, LICENSE_LABEL, &options, &default, |answer| {
             options.contains(&answer.to_string())
         })?;
         if answer == LICENSE_OTHER {
             let validate = required_answer("the license identifier");
-            let license = ask_text("License (SPDX identifier)", &custom_default, validate)?;
+            let license = ask_text(
+                prompter,
+                "License (SPDX identifier)",
+                &custom_default,
+                validate,
+            )?;
             cli.license = Some(license);
         } else {
             cli.license = Some(answer);
@@ -395,7 +400,12 @@ async fn run_wizard(mut cli: NewCli) -> Result<NewOptions, Box<dyn Error>> {
             .as_ref()
             .and_then(|p| p.command.clone())
             .unwrap_or_else(|| cli.name.clone().unwrap_or_default());
-        let command = ask_text("Command name", &default, options::validate_command)?;
+        let command = ask_text(
+            prompter,
+            "Command name",
+            &default,
+            options::validate_command,
+        )?;
         cli.command = Some(command);
     }
 
@@ -421,13 +431,13 @@ async fn run_wizard(mut cli: NewCli) -> Result<NewOptions, Box<dyn Error>> {
             );
         }
         let validate = |answer: &str| options::parse_maintainer(answer).map(|_| ());
-        cli.maintainer = Some(ask_text("Maintainer", &default, validate)?);
+        cli.maintainer = Some(ask_text(prompter, "Maintainer", &default, validate)?);
     }
 
     // 11. Target distribution. The menu derives from the distro data pkh
     //     ships (sorted); ubuntu is moved to the front when present so it
     //     stays the menu's first entry and fallback default as it has always
-    //     been — prompt::select positions on a default value, not an index.
+    //     been — the selector positions on a default value, not an index.
     if cli.dist.is_none() {
         let vendor = crate::build::env::current_vendor().to_lowercase();
         let mut options = crate::distro_info::supported_dists();
@@ -442,7 +452,7 @@ async fn run_wizard(mut cli: NewCli) -> Result<NewOptions, Box<dyn Error>> {
         } else {
             "ubuntu".to_string()
         };
-        let answer = select_from(DIST_LABEL, &options, &default, |answer| {
+        let answer = select_from(prompter, DIST_LABEL, &options, &default, |answer| {
             options.contains(&answer.to_string())
         })?;
         cli.dist = Some(answer);
@@ -456,7 +466,7 @@ async fn run_wizard(mut cli: NewCli) -> Result<NewOptions, Box<dyn Error>> {
     if cli.series.is_none() {
         match crate::distro_info::get_ordered_series_name(&dist).await {
             Ok(series) if !series.is_empty() => {
-                let answer = prompt::select(SERIES_LABEL, &series, &series[0])?;
+                let answer = prompter.select(SERIES_LABEL, &series, &series[0])?;
                 cli.series = Some(answer);
             }
             _ => {
@@ -472,6 +482,7 @@ async fn run_wizard(mut cli: NewCli) -> Result<NewOptions, Box<dyn Error>> {
     if template == TemplateId::EMPTY && cli.depends.is_empty() {
         let validate = |answer: &str| options::validate_depends(answer).map(|_| ());
         let answer = ask_text(
+            prompter,
             "Depends (metapackage, comma-separated, blank for an empty base)",
             "",
             validate,
@@ -494,7 +505,7 @@ async fn run_wizard(mut cli: NewCli) -> Result<NewOptions, Box<dyn Error>> {
         // `--no-git` already declined, or there is nothing to initialize.
         cli.git = false;
     } else {
-        cli.git = prompt::confirm("Initialize a git repository?", cli.git)?;
+        cli.git = prompter.confirm("Initialize a git repository?", cli.git)?;
     }
 
     // Resolve through the same pipeline as the non-interactive path: one
@@ -505,7 +516,7 @@ async fn run_wizard(mut cli: NewCli) -> Result<NewOptions, Box<dyn Error>> {
     // build resolve libraries through pkg-config? The project files prefill
     // the default (dependency() / pkg_check_modules calls found).
     if matches!(template, TemplateId::MESON | TemplateId::CMAKE)
-        && prompt::confirm(
+        && prompter.confirm(
             "Does the build resolve libraries through pkg-config (add it to Build-Depends)?",
             pkg_config_hint(&detect_dir, template),
         )?
@@ -515,7 +526,7 @@ async fn run_wizard(mut cli: NewCli) -> Result<NewOptions, Box<dyn Error>> {
 
     // Wizard-only extras (default off).
     if template != TemplateId::EMPTY
-        && prompt::confirm(
+        && prompter.confirm(
             "Add an autopkgtest smoke test (debian/tests/control)?",
             false,
         )?
@@ -523,15 +534,15 @@ async fn run_wizard(mut cli: NewCli) -> Result<NewOptions, Box<dyn Error>> {
         opts.autopkgtest = true;
     }
     if let Some(watch) = watch_template(opts.homepage.as_deref())
-        && prompt::confirm("Add a debian/watch release watcher?", false)?
+        && prompter.confirm("Add a debian/watch release watcher?", false)?
     {
         opts.watch = Some(watch);
     }
 
     // Summary screen + final confirmation: Ctrl+C or 'n' abort with
     // nothing written (generation is all-or-nothing later anyway).
-    println!("{}", summary_text(&opts, toolchain_pin.as_deref()));
+    prompter.present(&summary_text(&opts, toolchain_pin.as_deref()));
-    if !prompt::confirm("Generate?", true)? {
+    if !prompter.confirm("Generate?", true)? {
         return Err("Aborted: nothing was written to disk.".into());
     }
 
@@ -553,9 +564,10 @@ pub async fn offer_verification(
     outcome: &ScaffoldOutcome,
     multi: &MultiProgress,
     no_verify: bool,
+    prompter: &dyn Prompter,
 ) {
     let tree = opts.target_dir(&std::env::current_dir().unwrap_or_default());
-    let display = crate::ui::display_path(&tree);
+    let display = crate::report::display_path(&tree);
     let display = if display.is_empty() {
         ".".to_string()
     } else {
@@ -565,7 +577,7 @@ pub async fn offer_verification(
     if outcome.vendoring_failed {
         // Set apart from the surrounding success output by blank lines: a
         // single warning between two success lines is easy to miss.
-        println!();
+        prompter.present("");
         log::warn!(
             "The Cargo dependencies could NOT be vendored: this package will \
              not build until the vendoring is completed by hand:\n\
@@ -573,10 +585,10 @@ pub async fn offer_verification(
              \x20 2. add the printed source replacement to .cargo/config.toml, \
              plus `[net] offline = true`"
         );
-        println!();
+        prompter.present("");
     }
 
-    if no_verify || !is_interactive() {
+    if no_verify || !prompter.interactive() {
         return;
     }
 
@@ -585,7 +597,7 @@ pub async fn offer_verification(
     } else {
         "Verify with `pkh build` now?"
     };
-    let verify_source = match prompt::confirm(build_offer, !outcome.vendoring_failed) {
+    let verify_source = match prompter.confirm(build_offer, !outcome.vendoring_failed) {
         Ok(answer) => answer,
         Err(_) => return,
     };
@@ -593,12 +605,13 @@ pub async fn offer_verification(
         return;
     }
 
-    let ui = Some(std::sync::Arc::new(crate::ui::deb::DebUi::new(multi)));
+    let ui = std::sync::Arc::new(crate::ui::deb::DebUi::new(multi));
-    if let Err(e) = crate::build::build_source_package(
+    if let Err(e) = crate::build::build_source_package(crate::build::BuildSourceOptions {
-        Some(&tree),
+        source: Some(tree.clone()),
-        crate::build::SourceBuildOptions::default(),
+        options: crate::build::SourceBuildOptions::default(),
-        ui,
+        view: &*ui,
-    ) {
+        prompter,
+    }) {
         log::error!("Verification source build failed: {e}");
         log::info!(
             "The scaffolded tree is intact. Inspect it, then retry with \
@@ -612,7 +625,7 @@ pub async fn offer_verification(
         return;
     }
 
-    let verify_deb = match prompt::confirm(
+    let verify_deb = match prompter.confirm(
         "Verify with `pkh deb` now? (needs network + build deps)",
         false,
     ) {
@@ -623,20 +636,13 @@ pub async fn offer_verification(
         return;
     }
 
-    let ui = Some(std::sync::Arc::new(crate::ui::deb::DebUi::new(multi)));
+    let view = crate::ui::deb::DebUi::new(multi);
-    if let Err(e) = crate::deb::build_binary_package(
+    if let Err(e) = crate::deb::build_binary_package(crate::deb::DebBuildOptions {
-        None,
+        series: Some(opts.series.clone()),
-        Some(&opts.series),
+        cwd: Some(tree.clone()),
-        None,
+        view: &view,
-        Some(&tree),
+        ..Default::default()
-        false,
+    })
-        None,
-        None,
-        None,
-        None,
-        ui,
-        None,
-    )
     .await
     {
         log::error!("Verification binary build failed: {e}");
@@ -803,9 +809,13 @@ fn license_question_default(probe_license: Option<&str>) -> (String, String) {
 
 /// Ask the language question until a known template label (or CLI
 /// identifier) is answered — the selector allows typing arbitrary text.
-fn select_template(options: &[String], default: &str) -> Result<TemplateId, Box<dyn Error>> {
+fn select_template(
+    prompter: &dyn Prompter,
+    options: &[String],
+    default: &str,
+) -> Result<TemplateId, Box<dyn Error>> {
     loop {
-        let answer = prompt::select(LANGUAGE_LABEL, options, default)?;
+        let answer = prompter.select(LANGUAGE_LABEL, options, default)?;
         match TemplateId::from_label(&answer) {
             Some(id) => return Ok(id),
             None => log::warn!(
@@ -819,13 +829,14 @@ fn select_template(options: &[String], default: &str) -> Result<TemplateId, Box<
 /// Ask a `select` question until `accept` holds for the answer (the
 /// selector allows typing arbitrary text, which callers may need to reject).
 fn select_from(
+    prompter: &dyn Prompter,
     label: &str,
     options: &[String],
     default: &str,
     accept: impl Fn(&str) -> bool,
 ) -> Result<String, Box<dyn Error>> {
     loop {
-        let answer = prompt::select(label, options, default)?;
+        let answer = prompter.select(label, options, default)?;
         if accept(&answer) {
             return Ok(answer);
         }
@@ -838,7 +849,7 @@ fn select_from(
 /// upstream version like `1.0-2` carrying a Debian revision) is withheld —
 /// the question is asked without a default instead of offering one that
 /// Enter would accept verbatim.
-fn offered_default<'a>(default: &'a str, validate: &prompt::Validator) -> &'a str {
+fn offered_default<'a>(default: &'a str, validate: &Validator) -> &'a str {
     if default.is_empty() || validate(default).is_ok() {
         default
     } else {
@@ -850,11 +861,7 @@ fn offered_default<'a>(default: &'a str, validate: &prompt::Validator) -> &'a st
 /// `default`, and whatever answer is finally proposed — typed or the
 /// default — must pass `validate`. `Err` carries the validation error so the
 /// caller re-asks with it.
-fn accept_answer(
+fn accept_answer(answer: &str, default: &str, validate: &Validator) -> Result<String, String> {
-    answer: &str,
-    default: &str,
-    validate: &prompt::Validator,
-) -> Result<String, String> {
     let answer = if answer.is_empty() { default } else { answer };
     validate(answer).map(|_| answer.to_string())
 }
@@ -868,6 +875,7 @@ fn accept_answer(
 /// validation error) — probe data can never bypass validation and only blow
 /// up later in [`options::resolve`].
 fn ask_text(
+    prompter: &dyn Prompter,
     label: &str,
     default: &str,
     validate: impl Fn(&str) -> Result<(), String> + 'static,
@@ -889,7 +897,7 @@ fn ask_text(
         }
     };
     loop {
-        let answer = prompt::text(label, default, Some(&accept_empty))?;
+        let answer = prompter.text(label, default, Some(&accept_empty))?;
         // Typed non-empty answers were already validated by the prompt; only
         // an empty one resolves to the default, pre-decided above.
         let answer = if answer.is_empty() {
@@ -1551,7 +1559,7 @@ mod tests {
 
     #[test]
     fn select_labels_carry_their_own_separator() {
-        // prompt::select renders `> <label><answer>` verbatim; a label
+        // the selector renders `> <label><answer>` verbatim; a label
         // without a trailing separator glues the answer to the prompt
         // (regression: the wizard once rendered "> LicenseMIT").
         for label in SELECT_LABELS {

src/package_info.rs

@@ -9,6 +9,22 @@ use crate::apt::release::{self, VerifiedRelease};
 use crossterm::style::Stylize;
 use log::{debug, warn};
 
+/// Split a PPA reference into its `(user, name)` parts
+///
+/// A PPA is written `user/ppa_name` (e.g. `user/my-ppa`); anything else —
+/// more segments, empty parts — is a format error carrying the canonical
+/// message.
+pub fn split_ppa(ppa: &str) -> Result<(&str, &str), String> {
+    let parts: Vec<&str> = ppa.split('/').collect();
+    if parts.len() == 2 && !parts[0].is_empty() && !parts[1].is_empty() {
+        Ok((parts[0], parts[1]))
+    } else {
+        Err(format!(
+            "Invalid PPA format: '{ppa}'. Expected: user/ppa_name"
+        ))
+    }
+}
+
 /// Convert a PPA specification to a base URL
 ///
 /// # Arguments
@@ -943,6 +959,23 @@ pub async fn lookup(
 mod tests {
     use super::*;
 
+    /// `user/ppa_name` splits into its two parts.
+    #[test]
+    fn split_ppa_parses_the_canonical_form() {
+        assert_eq!(split_ppa("user/my-ppa"), Ok(("user", "my-ppa")));
+    }
+
+    /// Anything but exactly two non-empty segments is rejected, with the
+    /// canonical message.
+    #[test]
+    fn split_ppa_rejects_malformed_references() {
+        for bad in ["", "user", "user/", "/ppa", "a/b/c"] {
+            let err = split_ppa(bad).unwrap_err();
+            assert!(err.contains("Invalid PPA format"), "{err}");
+            assert!(err.contains(bad), "{err}");
+        }
+    }
+
     /// Serve canned byte responses on a local port, one per connection (the
     /// last response repeats), and return the base URL
     ///

src/put/mod.rs

@@ -18,7 +18,6 @@ pub mod target;
 use std::cmp::Ordering;
 use std::path::{Path, PathBuf};
 
-use indicatif::{MultiProgress, ProgressBar};
 use log::info;
 use serde::{Deserialize, Serialize};
 
@@ -27,10 +26,10 @@ use crate::debian::checksums::FileChecksums;
 use crate::debian::control::ControlInfo;
 use crate::debian::version::DebianVersion;
 use crate::launchpad;
-use crate::ui;
+use crate::report::{BuildTarget, BuildView, Prompter};
 
 /// Everything `put` needs to run.
-pub struct PutOptions {
+pub struct PutOptions<'a> {
     /// PPA to upload to, `user/ppa_name` format.
     pub ppa: String,
     /// Explicit `.changes` file to upload; when `None`, the one matching the
@@ -42,14 +41,25 @@ pub struct PutOptions {
     pub force: bool,
     /// Source package directory (the one containing `debian/`).
     pub cwd: PathBuf,
+    /// Where the upload progress (status messages, per-file byte counts) is
+    /// reported.
+    pub view: &'a dyn BuildView,
+    /// Who answers the host-key question on first contact with the target
+    /// server (fail-closed when nobody can be asked).
+    pub prompter: &'a dyn Prompter,
 }
 
-/// Upload the package described by `opts` to its target through `multi`'s
+/// Upload the package described by `opts` to its target, reporting progress
-/// progress bars.
+/// through the view and asking the prompter when the server is unknown.
-pub async fn put(
+pub async fn put(opts: &PutOptions<'_>) -> Result<(), Box<dyn std::error::Error>> {
-    opts: &PutOptions,
+    // The display is released on every path (success and early `?` bails)
-    multi: &MultiProgress,
+    // before the outcome is logged, so no stale status line lingers above it
-) -> Result<(), Box<dyn std::error::Error>> {
+    let result = put_impl(opts).await;
+    opts.view.suspend();
+    result
+}
+
+async fn put_impl(opts: &PutOptions<'_>) -> Result<(), Box<dyn std::error::Error>> {
     let target = launchpad::ppa_target(&opts.ppa)?;
 
     let ssh_config = ssh::lookup_ssh_config(&target.fqdn);
@@ -79,21 +89,20 @@ pub async fn put(
     };
     let changes = changes::parse(&changes_path)?;
 
-    // The summary line stays up for the whole flow: the completion message
+    // The summary line stays up for the whole flow: rendered as the view's
-    // replaces it on success, and the `PutBars` guard clears it on every
+    // persistent status, with the per-step messages below it
-    // early `?` bail so the error logged by main is not preceded by stale
+    opts.view.target(BuildTarget {
-    // bars
+        package: &changes.source,
-    let mut bars = PutBars::default();
+        version: &changes.version,
-    let summary = multi.add(ProgressBar::new(0));
+        target: &target.label,
-    // Style and prefix go in before the steady tick: otherwise the first
+        display: format!(
-    // tick can render one frame with the default bar template
-    summary.set_style(ui::spinner_style());
-    summary.set_prefix(format!(
             "Uploading {} {} to {}",
             changes.source, changes.version, target.label
-    ));
+        ),
-    summary.enable_steady_tick(TICK);
+        source_only: false,
-    bars.track(summary.clone());
+        // An upload runs no subprocess: nothing to tee
+        tee_log: false,
+    });
     changes::validate(&changes)?;
 
     // Pre-flight checks for everything the upload queue only rejects after
@@ -109,14 +118,10 @@ pub async fn put(
         ),
     }
 
-    let checking = multi.add(ProgressBar::new(0));
+    opts.view
-    checking.set_style(ui::spinner_style());
+        .message(&format!("Checking {} on Launchpad...", target.label));
-    checking.set_prefix(format!("Checking {} on Launchpad...", target.label));
-    checking.enable_steady_tick(TICK);
-    bars.track(checking.clone());
     launchpad::ppa_info(&opts.ppa).await?;
     launchpad::check_ppa_series(&changes.distribution).await?;
-    clear_bar(&checking);
 
     // Last pre-flight check: a version the PPA already publishes at or
     // above the changes' one would supersede (or reject) this upload
@@ -134,14 +139,10 @@ pub async fn put(
         .into());
     }
 
-    let connecting = multi.add(ProgressBar::new(0));
+    opts.view
-    connecting.set_style(ui::spinner_style());
+        .message(&format!("Connecting to {login}@{host}:{port}..."));
-    connecting.set_prefix(format!("Connecting to {login}@{host}:{port}..."));
+    let session = ssh::connect(&host, port, &login, &ssh_config, opts.prompter)?;
-    connecting.enable_steady_tick(TICK);
-    bars.track(connecting.clone());
-    let session = ssh::connect(&host, port, &login, &ssh_config)?;
     let sftp = ssh::sftp(&session)?;
-    clear_bar(&connecting);
 
     // Payload first, the .changes file last (like dput), so the server-side
     // queue processor can never pick up an incomplete upload
@@ -179,15 +180,11 @@ pub async fn put(
                 return Err(error);
             }
         };
-        // Same transfer view as pull: prefix line, bar on its own line
-        let bar = multi.add(ProgressBar::new(size));
-        bar.enable_steady_tick(std::time::Duration::from_millis(50));
-        bar.set_style(ui::transfer_style());
-        bar.set_prefix(format!("Uploading {name}..."));
-
         let remote = format!("{incoming}/{name}");
-        let result = ssh::upload_file(&sftp, path, &remote, &host, &bar);
+        let label = format!("Uploading {name}");
-        bar.finish_and_clear();
+        let view = opts.view;
+        let on_progress = |uploaded: u64| view.progress(&label, uploaded as usize, size as usize);
+        let result = ssh::upload_file(&sftp, path, &remote, &host, &on_progress);
         if let Err(e) = result {
             // The failed file itself joins the cleanup: its remote `create`
             // may have succeeded before the failure, leaving a partial — or,
@@ -204,9 +201,6 @@ pub async fn put(
     // replaying is safe).
     record_upload(&upload_log_path()?, &record)?;
 
-    // The completion lines replace the summary bar; the guard's own clear
-    // at scope exit is a no-op for the already-finished bars
-    clear_bar(&summary);
     info!(
         "Upload of {} {} to {} complete.",
         changes.source, changes.version, target.label
@@ -260,41 +254,6 @@ fn cleanup_partial_upload(
     }
 }
 
-/// Steady tick interval of every bar rendered by a `put` run
-const TICK: std::time::Duration = std::time::Duration::from_millis(50);
-
-/// Stop `bar`'s steady tick and clear it from the terminal. The tick is
-/// disabled first: a tick firing right after the clear would redraw a stale
-/// frame, the race [`crate::ui::deb::DebUi::suspend`] guards against too.
-/// Clearing twice is harmless: finished bars stay finished.
-fn clear_bar(bar: &ProgressBar) {
-    bar.disable_steady_tick();
-    bar.finish_and_clear();
-}
-
-/// The bars rendered by one `put` run, cleared when the guard drops. The
-/// error paths bail out early through `?` and `main` logs the error
-/// afterwards, so a bar left unfinished would linger on screen above it.
-#[derive(Default)]
-struct PutBars {
-    bars: Vec<ProgressBar>,
-}
-
-impl PutBars {
-    /// Track `bar` so it is cleared with the rest when the guard drops
-    fn track(&mut self, bar: ProgressBar) {
-        self.bars.push(bar);
-    }
-}
-
-impl Drop for PutBars {
-    fn drop(&mut self) {
-        for bar in &self.bars {
-            clear_bar(bar);
-        }
-    }
-}
-
 /// Validate the source package's `Section` (debian/control source stanza)
 /// against the distribution's valid sections: a bare section or a
 /// `section/subsection` is accepted. Archives reject uploads carrying an
@@ -521,7 +480,7 @@ fn discover_changes(cwd: &Path) -> Result<PathBuf, Box<dyn std::error::Error>> {
              Pass the one to upload explicitly",
             entry.source,
             many.iter()
-                .map(|p| ui::display_path(p))
+                .map(|p| crate::report::display_path(p))
                 .collect::<Vec<_>>()
                 .join(", ")
         )

src/put/ssh.rs

@@ -20,14 +20,13 @@ use std::net::{SocketAddr, TcpStream, ToSocketAddrs};
 use std::path::{Path, PathBuf};
 use std::time::Duration;
 
-use indicatif::ProgressBar;
 use log::debug;
 use serde::Deserialize;
 use sha2::{Digest, Sha256};
 use ssh2::{CheckResult, HostKeyType, KnownHostFileKind, KnownHosts, Session};
 
 use crate::data::embed_data;
-use crate::ui::prompt;
+use crate::report::Prompter;
 
 /// Pinned SSH host key fingerprints, loaded from the bundled
 /// `host_keys.yml` data file (same pattern as `distro_info.yml`): data
@@ -303,6 +302,7 @@ pub fn connect(
     port: u16,
     login: &str,
     config: &SshConfig,
+    prompter: &dyn Prompter,
 ) -> Result<Session, Box<dyn std::error::Error>> {
     let tcp = tcp_connect(host, port)?;
 
@@ -326,7 +326,7 @@ pub fn connect(
     let (key, key_type) = session
         .host_key()
         .ok_or_else(|| format!("{host} offered no host key"))?;
-    verify_host_key(host, port, key, key_type)?;
+    verify_host_key(host, port, key, key_type, prompter)?;
 
     authenticate(&session, host, login, config)?;
 
@@ -353,6 +353,7 @@ fn verify_host_key(
     port: u16,
     key: &[u8],
     key_type: HostKeyType,
+    prompter: &dyn Prompter,
 ) -> Result<(), Box<dyn std::error::Error>> {
     let fingerprint = fingerprint(key);
 
@@ -387,12 +388,7 @@ fn verify_host_key(
                 format!("[{host}]:{port}")
             };
 
-            // The banner is plain output: the confirmation prompt itself
+            if !prompter.accept_host_key(&display, key_type_desc, &fingerprint) {
-            // must stay a single line for its redraw logic
-            println!("The authenticity of host '{display}' can't be established.");
-            println!("{key_type_desc} key fingerprint is {fingerprint}.");
-            let accepted = prompt::confirm("Accept and store this host key?", false)?;
-            if !accepted {
                 return Err(format!("Host key for {display} rejected, aborting upload").into());
             }
             if let Some(name) = key_type_name(key_type) {
@@ -592,7 +588,7 @@ pub fn upload_file(
     local: &Path,
     remote: &str,
     host: &str,
-    bar: &ProgressBar,
+    on_progress: &dyn Fn(u64),
 ) -> Result<(), Box<dyn std::error::Error>> {
     let mut local_file =
         fs::File::open(local).map_err(|e| format!("cannot open '{}': {}", local.display(), e))?;
@@ -602,6 +598,7 @@ pub fn upload_file(
         .map_err(|e| format!("cannot create remote file {remote} on {host}: {e}"))?;
 
     let mut buf = [0u8; 32 * 1024];
+    let mut uploaded: u64 = 0;
     loop {
         let n = local_file.read(&mut buf)?;
         if n == 0 {
@@ -610,7 +607,8 @@ pub fn upload_file(
         remote_file
             .write_all(&buf[..n])
             .map_err(|e| format!("failed uploading to {remote} on {host}: {e}"))?;
-        bar.inc(n as u64);
+        uploaded += n as u64;
+        on_progress(uploaded);
     }
 
     // Close explicitly: quota-exceeded and similar failures only surface in

src/report.rs

@@ -0,0 +1,207 @@
+//! Environment-agnostic reporting ports.
+//!
+//! The core flows report progress and ask questions exclusively through the
+//! traits in this module, so the same pipeline can drive a terminal live
+//! view, a headless library consumer, or a remote frontend (e.g. a builder
+//! server forwarding build events to a web UI over server-sent events): every
+//! event carries plain data — strings, numbers, paths — with no terminal,
+//! styling or locale assumptions. Adapters decide how events reach the user:
+//! the terminal live view ([`crate::ui::deb::DebUi`]) renders them in place,
+//! while another embedding maps each method onto its own wire format.
+//!
+//! Every [`BuildView`] method defaults to doing nothing, so implementations
+//! only override the events they care about; [`Quiet`] provides the inert
+//! implementations used by headless runs and tests. [`Prompter`] is
+//! deliberately blocking: an implementation may round-trip each question to
+//! a remote user, as long as it eventually answers (or takes the default).
+//! Asking can fail (the user cancels, the connection drops); flows
+//! propagate the error, which aborts them.
+
+use std::error::Error;
+use std::path::{Path, PathBuf};
+use std::sync::Arc;
+
+use crate::context::LineSink;
+use crate::logfmt::Classifier;
+
+/// Answer validator of [`Prompter::text`]: accepts the answer, or explains
+/// why it is rejected (the implementation re-asks with the explanation).
+pub type Validator = dyn Fn(&str) -> Result<(), String>;
+
+/// Identity of the build whose events follow, as announced through
+/// [`BuildView::target`].
+#[derive(Debug, Clone)]
+pub struct BuildTarget<'a> {
+    /// Source package name (e.g. `hello`).
+    pub package: &'a str,
+    /// Full version being built (e.g. `2.10-3`).
+    pub version: &'a str,
+    /// What the build targets: a distribution series, optionally with an
+    /// architecture (`noble`, `sid`, `noble/arm64`), or the upload target
+    /// label.
+    pub target: &'a str,
+    /// Ready-to-render status line for display adapters, composed by the
+    /// flow (e.g. "Building source package hello (2.10-3) for unstable",
+    /// "Uploading hello (2.10-3) to ppa:user/ppa"): the wording is the
+    /// flow's, adapters render it verbatim.
+    pub display: String,
+    /// Whether this is a source-only build (producing a `.dsc`); names the
+    /// terminal adapter's tee log (`build-*.log` vs `deb-*.log`).
+    pub source_only: bool,
+    /// Whether the view should tee raw subprocess output to its log file.
+    /// Flows without subprocess output (uploads) pass `false` and create
+    /// no log file.
+    pub tee_log: bool,
+}
+
+/// Observer of a running build: target identification, phases, status
+/// messages, progress and the final outcome.
+///
+/// Implement this to observe the [`crate::build`] and [`crate::deb`] flows
+/// from any frontend. All events arrive in order from the build thread;
+/// long-lived views are expected to be `Send + Sync` because builds may run
+/// inside async tasks.
+pub trait BuildView: Send + Sync {
+    /// The build target was identified; the events that follow belong to it
+    /// (including the earliest subprocess output, e.g. a chroot download).
+    fn target(&self, _target: BuildTarget) {}
+
+    /// A named phase started (e.g. "Applying patches"). `classifier`
+    /// rewrites the phase's raw subprocess lines (see [`crate::logfmt`])
+    /// into display actions and countable progress; views that do not
+    /// rewrite lines locally can ignore it and forward raw lines from
+    /// [`BuildView::sink`] instead.
+    fn phase(&self, _name: &str, _classifier: Box<dyn Classifier>) {}
+
+    /// A status message about in-process work that produces no subprocess
+    /// output (e.g. "Generating .changes").
+    fn message(&self, _text: &str) {}
+
+    /// Determinate progress within the current phase (e.g. artifact
+    /// retrieval); `pos` runs from 0 to `total`.
+    fn progress(&self, _label: &str, _pos: usize, _total: usize) {}
+
+    /// Sink receiving every raw subprocess line while a build command runs,
+    /// when this view consumes the lines itself (live rewriting, tee to a
+    /// log file, forwarding over the network). `None` lets the caller fall
+    /// back to its default handling (e.g. test capture).
+    fn sink(&self) -> Option<Arc<dyn LineSink>> {
+        None
+    }
+
+    /// The build succeeded; `artifacts` lists the produced files in
+    /// distribution order (dsc → tarballs → buildinfo → changes).
+    fn finish_success(&self, _artifacts: &[PathBuf]) {}
+
+    /// The build failed; the view should release the display and may report
+    /// diagnostics it collected through [`BuildView::sink`].
+    fn finish_failure(&self) {}
+
+    /// Release the display before writing directly to the shared terminal
+    /// (passthrough diagnostics, cleanup commands that inherit it). The
+    /// release is final for this build; later events may be dropped. A
+    /// no-op for views without a display.
+    fn suspend(&self) {}
+
+    /// Whether this view presents build results to the user by itself;
+    /// callers use this to fall back to plain-line rendering when it does
+    /// not (headless views, verbose mode).
+    fn is_enabled(&self) -> bool {
+        false
+    }
+}
+
+/// Answerer of the questions a core flow may ask mid-run.
+///
+/// Questions are blocking on purpose: a terminal implementation waits for
+/// key presses, and a builder-server implementation may forward the question
+/// to a web client and await the answer on a channel. Implementations that
+/// cannot ask anyone answer with the question's default.
+pub trait Prompter: Send + Sync {
+    /// Whether this prompter can interact with a user at all. Flows with an
+    /// interactive and a headless path use this to pick one: a headless run
+    /// takes the defaults or fails with the list of missing answers instead
+    /// of asking question by question.
+    fn interactive(&self) -> bool {
+        false
+    }
+
+    /// Ask a yes/no question. `default` is the answer to take when no user
+    /// can be reached; `Err` means the question was cancelled (Ctrl+C,
+    /// dropped connection) and the flow should abort.
+    fn confirm(&self, _question: &str, default: bool) -> Result<bool, Box<dyn Error>> {
+        Ok(default)
+    }
+
+    /// Ask a one-line selection among `options`, with `default`
+    /// preselected. Selector implementations may also accept typed
+    /// arbitrary text; callers validate the answer and re-ask through the
+    /// same method when they must reject one. `Err` cancels the flow.
+    fn select(
+        &self,
+        _label: &str,
+        _options: &[String],
+        default: &str,
+    ) -> Result<String, Box<dyn Error>> {
+        Ok(default.to_string())
+    }
+
+    /// Ask a free-text answer. `validate` is applied by the implementation
+    /// so invalid input re-asks at the source (mid-input for a terminal,
+    /// round-trip for a server). `Err` cancels the flow.
+    fn text(
+        &self,
+        _label: &str,
+        default: &str,
+        _validate: Option<&Validator>,
+    ) -> Result<String, Box<dyn Error>> {
+        Ok(default.to_string())
+    }
+
+    /// Ask whether to accept and store an unverified SSH host key (trust on
+    /// first use): `host` is the display form (`host` or `[host]:port`),
+    /// `key_type` the key type name ("ssh-ed25519", ...) and `fingerprint`
+    /// the human-readable digest. Fail-closed: implementations that cannot
+    /// ask anyone answer `false`, refusing the connection.
+    fn accept_host_key(&self, _host: &str, _key_type: &str, _fingerprint: &str) -> bool {
+        false
+    }
+
+    /// Present information to the user outside of any question: the
+    /// scaffold wizard's summary screen, prominent notices around a
+    /// warning. Terminal implementations print the text as-is (unstyled,
+    /// on stdout); server implementations forward it as a display event.
+    /// Implementations that cannot show anything drop it — flows only
+    /// present context that is also available structurally (returned data,
+    /// log records).
+    fn present(&self, _text: &str) {}
+}
+
+/// Inert view and prompter: drops every event and answers every question
+/// with its default. The stand-in for headless library runs, verbose mode
+/// and tests.
+pub struct Quiet;
+
+impl BuildView for Quiet {}
+impl Prompter for Quiet {}
+
+/// Render a path for terminal display: relative to the current working
+/// directory when the target lives inside it or directly next to it
+/// (`../name`, the usual layout of build artifacts), absolute otherwise.
+///
+/// Pure formatting shared by the flows that mention paths in their events
+/// and messages; a remote frontend reproduces it (or not) on its side.
+pub fn display_path(path: &Path) -> String {
+    let Ok(cwd) = std::env::current_dir() else {
+        return path.display().to_string();
+    };
+    if let Ok(rel) = path.strip_prefix(&cwd) {
+        return rel.display().to_string();
+    }
+    if let Some(parent) = cwd.parent()
+        && let Ok(rel) = path.strip_prefix(parent)
+    {
+        return format!("../{}", rel.display());
+    }
+    path.display().to_string()
+}

src/ui.rs

@@ -3,8 +3,6 @@
 
 /// Live build view for `pkh deb` (status bar + rolling log pane)
 pub mod deb;
-/// Line classifiers rewriting raw subprocess output for the live views
-pub mod logfmt;
 /// Interactive raw-mode prompts: free-text input, option selection and
 /// yes/no confirmation
 pub mod prompt;
@@ -12,27 +10,8 @@ pub mod prompt;
 #[cfg(test)]
 use indicatif::ProgressDrawTarget;
 use indicatif::{MultiProgress, ProgressBar, ProgressStyle};
-use std::path::Path;
 use std::time::Duration;
 
-/// Render a path for terminal display: relative to the current working
-/// directory when the target lives inside it or directly next to it
-/// (`../name`, the usual layout of build artifacts), absolute otherwise.
-pub fn display_path(path: &Path) -> String {
-    let Ok(cwd) = std::env::current_dir() else {
-        return path.display().to_string();
-    };
-    if let Ok(rel) = path.strip_prefix(&cwd) {
-        return rel.display().to_string();
-    }
-    if let Some(parent) = cwd.parent()
-        && let Ok(rel) = path.strip_prefix(parent)
-    {
-        return format!("../{}", rel.display());
-    }
-    path.display().to_string()
-}
-
 /// Style of an unsized operation: spinner and prefix on one line
 pub(crate) fn spinner_style() -> ProgressStyle {
     ProgressStyle::default_bar()

src/ui/deb.rs

@@ -3,7 +3,7 @@
 //! ("a terminal in the terminal").
 //!
 //! Subprocess output is captured through a [`LineSink`] implementation,
-//! rewritten by classifiers ([`crate::ui::logfmt`]) and rendered in place
+//! rewritten by classifiers ([`crate::logfmt`]) and rendered in place
 //! with indicatif, so pkh's own log lines keep printing above the widget via
 //! `indicatif-log-bridge`. Every raw captured line is also tee'd to a log
 //! file under the pkh cache directory.
@@ -21,10 +21,8 @@ use directories::ProjectDirs;
 use indicatif::{MultiProgress, ProgressBar, ProgressStyle};
 
 use crate::context::{LineSink, Stream};
-use crate::ui::logfmt::{
+use crate::logfmt::{Action, Classifier, GenericClassifier};
-    Action, AptInstallClassifier, AptUpdateClassifier, Classifier, GenericClassifier,
+use crate::report::BuildTarget;
-    MakeClassifier, MmdebstrapClassifier, QuiltClassifier,
-};
 
 /// Number of lines displayed in the rolling pane
 const PANE_LINES: usize = 10;
@@ -32,69 +30,6 @@ const PANE_LINES: usize = 10;
 /// Minimum interval between pane redraws
 const REDRAW_INTERVAL: Duration = Duration::from_millis(50);
 
-/// Build phases of `pkh deb`, shown in the status bar
-#[derive(Debug, Clone, Copy, PartialEq, Eq)]
-pub enum Phase {
-    /// Downloading the chroot tarball (mmdebstrap)
-    PreparingChroot,
-    /// Extracting the chroot tarball
-    ExtractingChroot,
-    /// Device nodes, /proc bind mount, etc.
-    FinalizingChroot,
-    /// apt-get update
-    UpdatingPackageLists,
-    /// Installing build-essential & co
-    InstallingEssentials,
-    /// quilt push -a
-    ApplyingPatches,
-    /// --inject packages
-    InjectingPackages,
-    /// apt-get build-dep
-    InstallingBuildDeps,
-    /// debian/rules build
-    Building,
-    /// fakeroot debian/rules binary
-    ProducingBinaries,
-    /// Retrieving produced .deb files
-    RetrievingArtifacts,
-}
-
-impl Phase {
-    /// Human-readable label displayed in the status bar
-    pub fn label(&self) -> &'static str {
-        match self {
-            Phase::PreparingChroot => "Preparing chroot",
-            Phase::ExtractingChroot => "Extracting chroot",
-            Phase::FinalizingChroot => "Finalizing chroot",
-            Phase::UpdatingPackageLists => "Updating package lists",
-            Phase::InstallingEssentials => "Installing essential packages",
-            Phase::ApplyingPatches => "Applying patches",
-            Phase::InjectingPackages => "Injecting packages",
-            Phase::InstallingBuildDeps => "Installing build dependencies",
-            Phase::Building => "Building package",
-            Phase::ProducingBinaries => "Producing binary packages",
-            Phase::RetrievingArtifacts => "Retrieving artifacts",
-        }
-    }
-}
-
-/// Default classifier used for a given phase
-fn default_classifier(phase: Phase) -> Box<dyn Classifier> {
-    match phase {
-        Phase::PreparingChroot => Box::new(MmdebstrapClassifier::new()),
-        Phase::ExtractingChroot | Phase::FinalizingChroot => Box::new(GenericClassifier::new()),
-        Phase::UpdatingPackageLists => Box::new(AptUpdateClassifier::new()),
-        Phase::InstallingEssentials => Box::new(AptInstallClassifier::new("Installing essentials")),
-        Phase::ApplyingPatches => Box::new(QuiltClassifier::new(0)),
-        Phase::InjectingPackages => Box::new(AptInstallClassifier::new("Injecting packages")),
-        Phase::InstallingBuildDeps => {
-            Box::new(AptInstallClassifier::new("Installing build dependencies"))
-        }
-        Phase::Building | Phase::ProducingBinaries => Box::new(MakeClassifier::new()),
-        Phase::RetrievingArtifacts => Box::new(GenericClassifier::new()),
-    }
-}
-
 /// Visual kind of a pane line, driving its color
 #[derive(Debug, Clone, Copy, PartialEq)]
 enum Kind {
@@ -129,9 +64,9 @@ struct Shared {
 
 /// Live build view for `pkh deb` / `pkh build`
 ///
-/// Create one per build (disabled automatically when stdout is not a TTY or
+/// Create one per build (it disables itself automatically when stdout is not
-/// when the user requests verbose output), pass it down as
+/// a TTY) and pass it down through the [`crate::report::BuildView`] port.
-/// `Option<Arc<DebUi>>`, and feed subprocess output through [`DebUi::sink`].
+/// Subprocess output reaches it through [`crate::report::BuildView::sink`].
 pub struct DebUi {
     shared: Arc<Shared>,
 }
@@ -213,17 +148,6 @@ impl DebUi {
         self.open_log("deb", package, version, &format!("for {series}/{arch}"));
     }
 
-    /// Identify the source package being built; names the log file
-    /// (`build-<package>-<version>-<timestamp>.log`) and the status bar
-    pub fn set_build_target(&self, package: &str, version: &str, distribution: &str) {
-        if self.shared.enabled {
-            self.shared.top.set_prefix(format!(
-                "Building source package {package} ({version}) for {distribution}"
-            ));
-        }
-        self.open_log("build", package, version, &format!("for {distribution}"));
-    }
-
     /// Rename the placeholder log file to include the build identity
     /// (best-effort), then open it so subsequent captured lines are tee'd
     fn open_log(&self, kind: &str, package: &str, version: &str, detail: &str) {
@@ -261,20 +185,8 @@ impl DebUi {
         }
     }
 
-    /// Switch to a phase, installing its default classifier
+    /// Switch to an arbitrary status label with a custom classifier
-    pub fn phase(&self, phase: Phase) {
+    fn phase_custom(&self, label: &str, classifier: Box<dyn Classifier>) {
-        self.phase_custom(phase.label(), default_classifier(phase));
-    }
-
-    /// Switch to a phase with a custom classifier (e.g. quilt with a known
-    /// patch count)
-    pub fn phase_with(&self, phase: Phase, classifier: Box<dyn Classifier>) {
-        self.phase_custom(phase.label(), classifier);
-    }
-
-    /// Switch to an arbitrary status label with a custom classifier; used by
-    /// flows whose phases are not part of [`Phase`] (e.g. source builds)
-    pub fn phase_custom(&self, label: &str, classifier: Box<dyn Classifier>) {
         {
             let mut st = self.shared.state.lock().unwrap();
             st.classifier = classifier;
@@ -289,53 +201,18 @@ impl DebUi {
         }
     }
 
-    /// Update the status bar message directly (for in-process work such as
-    /// tarball extraction that has no subprocess output)
-    pub fn progress_message(&self, msg: &str) {
-        if self.active() {
-            self.shared.top.set_message(msg.to_string());
-        }
-    }
-
-    /// Drive the determinate progress bar directly (e.g. artifact retrieval)
-    pub fn count_progress(&self, label: &str, pos: usize, total: usize) {
-        if !self.active() || total == 0 {
-            return;
-        }
-        apply_progress(
-            &self.shared.top,
-            &mut self.shared.state.lock().unwrap(),
-            pos as u64,
-            total as u64,
-        );
-        self.shared.top.set_message(label.to_string());
-    }
-
     /// Whether the widget is enabled and still drawn
     fn active(&self) -> bool {
         self.shared.enabled && !self.shared.suspended.load(Ordering::SeqCst)
     }
 
-    /// Whether the widget renders at all (false on non-TTY stdout); callers
+    /// Release the widget from the terminal (e.g. before printing
-    /// use this to fall back to plain-line summaries
+    /// passthrough diagnostics or letting child cleanup commands write to
-    pub fn is_enabled(&self) -> bool {
+    /// the terminal); idempotent
-        self.shared.enabled
-    }
-
-    /// Obtain a sink feeding this view; pass it to `ContextCommand::capture`
-    pub fn sink(self: &Arc<Self>) -> Arc<dyn LineSink> {
-        Arc::new(Sink {
-            shared: self.shared.clone(),
-        })
-    }
-
-    /// Remove the widget from the terminal (e.g. before printing passthrough
-    /// diagnostics or letting child cleanup commands write to the terminal);
-    /// idempotent
     ///
     /// Steady ticks are disabled first: otherwise a tick can redraw a frame
     /// right after the clear, leaving stale copies of the widget on screen.
-    pub fn suspend(&self) {
+    fn suspend(&self) {
         if !self.shared.enabled {
             return;
         }
@@ -348,21 +225,21 @@ impl DebUi {
         self.shared.pane.finish_and_clear();
     }
 
-    /// Clear the widget and print a success summary with the artifacts,
+    /// Success outcome body: clear the widget and print the artifacts,
     /// rendered relative to the working directory when possible
-    pub fn finish_success(&self, artifacts: &[PathBuf], elapsed: Duration) {
+    fn success_summary(&self, artifacts: &[PathBuf], elapsed: Duration) {
         self.suspend();
         if self.shared.enabled && !artifacts.is_empty() {
             println!("Built in {}s:", elapsed.as_secs());
             for artifact in artifacts {
-                println!("  {}", crate::ui::display_path(artifact));
+                println!("  {}", crate::report::display_path(artifact));
             }
         }
     }
 
-    /// Clear the widget and print a failure summary (recent captured errors
+    /// Failure outcome body: clear the widget and print a summary (recent
-    /// and the path to the full log)
+    /// captured errors and the path to the full log)
-    pub fn finish_failure(&self) {
+    fn failure_summary(&self) {
         self.suspend();
 
         let st = self.shared.state.lock().unwrap();
@@ -385,15 +262,70 @@ impl DebUi {
             eprintln!("Full log: {}", log_path.display());
         }
     }
-
-    /// Time elapsed since the view was created
-    pub fn elapsed(&self) -> Duration {
-        self.shared.started.elapsed()
 }
 
-    /// Path of the full build log file
+/// [`crate::report::BuildView`] port: forwards build events to the live
-    pub fn log_path(&self) -> PathBuf {
+/// widget, so core flows drive the view without knowing it is a terminal
-        self.shared.log_path.lock().unwrap().clone()
+/// widget.
+impl crate::report::BuildView for DebUi {
+    fn target(&self, target: BuildTarget<'_>) {
+        if self.shared.enabled {
+            self.shared.top.set_prefix(target.display.clone());
+        }
+        if target.tee_log {
+            let kind = if target.source_only { "build" } else { "deb" };
+            self.open_log(
+                kind,
+                target.package,
+                target.version,
+                &format!("for {}", target.target),
+            );
+        }
+    }
+
+    fn phase(&self, name: &str, classifier: Box<dyn Classifier>) {
+        self.phase_custom(name, classifier);
+    }
+
+    fn message(&self, text: &str) {
+        if self.active() {
+            self.shared.top.set_message(text.to_string());
+        }
+    }
+
+    fn progress(&self, label: &str, pos: usize, total: usize) {
+        if !self.active() || total == 0 {
+            return;
+        }
+        apply_progress(
+            &self.shared.top,
+            &mut self.shared.state.lock().unwrap(),
+            pos as u64,
+            total as u64,
+        );
+        self.shared.top.set_message(label.to_string());
+    }
+
+    fn sink(&self) -> Option<Arc<dyn LineSink>> {
+        Some(Arc::new(Sink {
+            shared: self.shared.clone(),
+        }))
+    }
+
+    fn finish_success(&self, artifacts: &[PathBuf]) {
+        self.success_summary(artifacts, self.shared.started.elapsed());
+    }
+
+    fn finish_failure(&self) {
+        self.failure_summary();
+    }
+
+    fn suspend(&self) {
+        DebUi::suspend(self);
+    }
+
+    fn is_enabled(&self) -> bool {
+        self.shared.enabled
     }
 }
 

src/ui/prompt.rs

@@ -12,7 +12,7 @@ use crossterm::{
     style::{self, Color, Print, SetForegroundColor},
     terminal,
 };
-use std::io::{self, Write};
+use std::io::{self, IsTerminal, Write};
 use std::time::Duration;
 
 /// Why a prompt could not run interactively
@@ -32,9 +32,8 @@ impl std::fmt::Display for PromptError {
 
 impl std::error::Error for PromptError {}
 
-/// Answer validator of [`text`]: accepts the answer, or explains why it is
+/// Answer validator of [`text`] (re-exported from [`crate::report`])
-/// rejected
+pub use crate::report::Validator;
-pub type Validator = dyn Fn(&str) -> Result<(), String>;
 
 /// What a prompt's event loop asks its drawing helper to render; keeping all
 /// terminal access behind this callback makes the loops pure logic that unit
@@ -127,6 +126,53 @@ pub fn confirm(label: &str, default: bool) -> Result<bool, Box<dyn std::error::E
     }
 }
 
+/// [`crate::report::Prompter`] answered by the interactive terminal: each
+/// question runs the matching raw-mode prompt. Without an interactive
+/// terminal (CI, piped input) [`Prompter::interactive`] is false — flows
+/// then take their headless path instead of asking — and a cancel (Ctrl+C)
+/// propagates as `Err` so flows can abort.
+pub struct TerminalPrompter;
+
+impl crate::report::Prompter for TerminalPrompter {
+    fn interactive(&self) -> bool {
+        std::io::stdin().is_terminal() && std::io::stdout().is_terminal()
+    }
+
+    fn confirm(&self, question: &str, default: bool) -> Result<bool, Box<dyn std::error::Error>> {
+        confirm(question, default)
+    }
+
+    fn select(
+        &self,
+        label: &str,
+        options: &[String],
+        default: &str,
+    ) -> Result<String, Box<dyn std::error::Error>> {
+        select(label, options, default)
+    }
+
+    fn text(
+        &self,
+        label: &str,
+        default: &str,
+        validate: Option<&Validator>,
+    ) -> Result<String, Box<dyn std::error::Error>> {
+        text(label, default, validate)
+    }
+
+    fn accept_host_key(&self, host: &str, key_type: &str, fingerprint: &str) -> bool {
+        // The banner is plain output: the confirmation prompt itself must
+        // stay a single line for its redraw logic
+        println!("The authenticity of host '{host}' can't be established.");
+        println!("{key_type} key fingerprint is {fingerprint}.");
+        confirm("Accept and store this host key?", false).unwrap_or(false)
+    }
+
+    fn present(&self, text: &str) {
+        println!("{text}");
+    }
+}
+
 /// Run `prompt` with the terminal in raw mode, always restoring it
 /// afterwards. Fails with [`PromptError::NotATty`] when raw mode cannot be
 /// enabled.