new: add upstream-aware orig tarball origins and the orig-vendor component

src/build/mod.rs

@@ -14,6 +14,7 @@ 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;
@@ -61,6 +62,12 @@ pub struct SourceBuildOutput {
 /// bar + rolling pane) and tee'd to a log file; on failure the view prints a
 /// summary of the last captured errors. Without a UI, commands inherit the
 /// terminal as before.
+///
+/// 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
+/// flow offers to re-vendor, recreate the component and retry the build
+/// exactly once.
 pub fn build_source_package(
     cwd: Option<&Path>,
     ui: Option<Arc<DebUi>>,
@@ -68,6 +75,9 @@ pub fn build_source_package(
     let cwd = cwd.unwrap_or_else(|| Path::new("."));
     let output = match run_source_build(cwd, &SourceBuildOptions::default(), ui.clone()) {
         Ok(output) => output,
+        Err(e) if e.downcast_ref::<VendorDriftError>().is_some() => {
+            return retry_after_revendor(cwd, ui, e);
+        }
         Err(e) => {
             if let Some(u) = &ui {
                 u.finish_failure();
@@ -106,6 +116,83 @@ pub fn build_source_package(
     Ok(())
 }
 
+/// 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>>,
+    original: Box<dyn Error>,
+) -> Result<(), Box<dyn Error>> {
+    let interactive = std::io::stdin().is_terminal() && std::io::stdout().is_terminal();
+    if !interactive {
+        if let Some(u) = &ui {
+            u.finish_failure();
+        }
+        return Err(original);
+    }
+
+    log::error!("{original}");
+    let retry = crate::ui::prompt::confirm(
+        "Re-vendor the Cargo dependencies and retry the build?",
+        false,
+    )
+    .unwrap_or(false);
+    if !retry {
+        if let Some(u) = &ui {
+            u.finish_failure();
+        }
+        return Err(original);
+    }
+
+    // 1. Re-vendor into the tree. The vendoring helper never overwrites an
+    //    existing `.cargo/config.toml` (scaffold-time safety); in a package
+    //    we vendored before, that config is ours — remove it so it is
+    //    refreshed. A foreign config (no vendored-source marker) is left
+    //    alone and makes the vendoring report incomplete below.
+    let config = cwd.join(".cargo/config.toml");
+    if config.exists()
+        && std::fs::read_to_string(&config)
+            .is_ok_and(|content| content.contains("[source.crates-io]"))
+    {
+        std::fs::remove_file(&config)?;
+    }
+    if !crate::new::templates::rust::vendor_dependencies(cwd)? {
+        if let Some(u) = &ui {
+            u.finish_failure();
+        }
+        return Err(
+            "Re-vendoring did not complete: the tree is unchanged, fix the \
+             vendoring by hand and build again."
+                .into(),
+        );
+    }
+
+    // 2. Recreate the orig-vendor component from the fresh vendor/ tree,
+    //    under the name dpkg-source globs for: the changelog version's
+    //    UPSTREAM part (`0.14.0`, not the full `0.14.0-1` — the stale
+    //    component would survive and the next build would fail again).
+    let entry = crate::debian::parse_changelog_entry(&cwd.join("debian/changelog"))?;
+    let uversion = crate::new::orig::component_upstream_version(&entry.version);
+    let component = crate::new::orig::vendor_component_path(cwd, &entry.source, uversion)
+        .ok_or_else(|| {
+            format!(
+                "cannot determine the output directory of '{}' ",
+                cwd.display()
+            )
+        })?;
+    if component.exists() {
+        std::fs::remove_file(&component)?;
+    }
+    crate::new::orig::create_vendor_component(cwd, &entry.source, uversion)?;
+
+    // 3. One retry.
+    run_source_build(cwd, &SourceBuildOptions::default(), ui).map(|_| ())
+}
+
 /// Run the full native source-build pipeline in `cwd`.
 ///
 /// Steps (mirroring `dpkg-buildpackage -S -I -i -nc -d`):
@@ -280,13 +367,19 @@ pub fn run_source_build(
             Box::new(DpkgSourceClassifier::new()),
         );
     }
-    run_command(
+    if let Err(failure) = run_command_capturing(
         cwd,
         "dpkg-source",
         &["-I", "-i", "-b", "."],
         &pipeline_env,
         sink.as_ref(),
-    )?;
+    ) {
+        return Err(dpkg_source_failure_error(
+            classify_dpkg_source_failure(&failure.stderr),
+            &failure.stderr,
+            failure.error,
+        ));
+    }
 
     if !dsc_path.exists() {
         return Err(format!(
@@ -603,19 +696,116 @@ fn parse_checksum_field(field: &str, value: &str) -> Result<Vec<ChecksumLine>, S
     Ok(entries)
 }
 
+/// Why a `dpkg-source -b` run failed, classified from its captured stderr.
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub(crate) enum DpkgSourceFailure {
+    /// A path under `vendor/` (or the `orig-vendor` component itself) is
+    /// named in the error: the vendored dependencies changed since the
+    /// orig-vendor component was created.
+    VendorDrift,
+    /// Unrepresentable changes to source outside `vendor/`: the upstream
+    /// tree drifted beyond the orig snapshot.
+    UpstreamDrift,
+    /// Anything else (changelog errors, missing files, …).
+    Other,
+}
+
+/// Classify a captured `dpkg-source -b` stderr. Any error line naming a
+/// `vendor/` path or the `orig-vendor` component wins (the vendored tree is
+/// what the build choked on); the bare "unrepresentable changes to source"
+/// summary without a vendor mention points at general upstream drift.
+pub(crate) fn classify_dpkg_source_failure(stderr: &str) -> DpkgSourceFailure {
+    if stderr
+        .lines()
+        .any(|line| line.contains("vendor/") || line.contains("orig-vendor"))
+    {
+        return DpkgSourceFailure::VendorDrift;
+    }
+    if stderr.contains("unrepresentable changes to source") {
+        return DpkgSourceFailure::UpstreamDrift;
+    }
+    DpkgSourceFailure::Other
+}
+
+/// The typed error of the [`DpkgSourceFailure::VendorDrift`] case, letting
+/// the build wrapper offer the re-vendor retry. The type must survive all
+/// the way to [`build_source_package`], so the offending dpkg-source line
+/// travels inside the error instead of being string-wrapped around it.
+#[derive(Debug)]
+pub(crate) struct VendorDriftError {
+    /// The offending dpkg-source stderr line, when one was captured.
+    detail: Option<String>,
+}
+
+impl std::fmt::Display for VendorDriftError {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        write!(
+            f,
+            "dpkg-source failed: the vendored dependencies changed since \
+             the orig-vendor component was created. Re-vendor the tree \
+             (`cargo vendor`) and recreate the <name>_<version>.\
+             orig-vendor.tar.xz component, then build again."
+        )?;
+        if let Some(detail) = &self.detail {
+            write!(f, " (dpkg-source said: {detail})")?;
+        }
+        Ok(())
+    }
+}
+
+impl Error for VendorDriftError {}
+
+/// The user-facing error for a classified `dpkg-source -b` failure: a
+/// pointed explanation for the two known drift cases, the raw command
+/// failure otherwise.
+fn dpkg_source_failure_error(
+    failure: DpkgSourceFailure,
+    stderr: &str,
+    command_error: Box<dyn Error>,
+) -> Box<dyn Error> {
+    match failure {
+        DpkgSourceFailure::VendorDrift => {
+            let detail = stderr
+                .lines()
+                .find(|line| line.contains("vendor"))
+                .map(str::trim)
+                .filter(|line| !line.is_empty());
+            Box::new(VendorDriftError {
+                detail: detail.map(str::to_string),
+            })
+        }
+        DpkgSourceFailure::UpstreamDrift => format!(
+            "dpkg-source failed: the upstream tree drifted beyond the orig \
+             snapshot — bump the version (`pkh chlog`) or re-scaffold. \
+             (raw error: {command_error})"
+        )
+        .into(),
+        DpkgSourceFailure::Other => command_error,
+    }
+}
+
+/// A command failure together with the stderr captured while it ran (empty
+/// when the streams were inherited, e.g. verbose mode).
+struct CommandFailure {
+    error: Box<dyn Error>,
+    stderr: String,
+}
+
 /// Run a build command in `cwd` with extra environment variables layered on
 /// top of the inherited environment.
 ///
 /// When `sink` is set, stdout/stderr are piped and every line is forwarded to
-/// it (live view + tee log); otherwise stdio is inherited from the terminal.
+/// it (live view + tee log) while the stderr is additionally captured for
-/// Returns an error on non-zero exit status.
+/// the failure classification; otherwise stdio is inherited from the
-fn run_command(
+/// terminal. Returns an error (with the captured stderr) on non-zero exit
+/// status.
+fn run_command_capturing(
     cwd: &Path,
     program: &str,
     args: &[&str],
     env: &BTreeMap<String, String>,
     sink: Option<&Arc<dyn LineSink>>,
-) -> Result<(), Box<dyn Error>> {
+) -> Result<(), CommandFailure> {
     log::debug!(
         "running: {} {} (in {})",
         program,
@@ -626,15 +816,21 @@ fn run_command(
     let mut cmd = Command::new(program);
     cmd.current_dir(cwd).envs(env).args(args);
 
+    // The last 64 KiB of stderr, kept for the dpkg-source failure
+    // classification.
+    let stderr_capture = Arc::new(std::sync::Mutex::new(String::new()));
+
     let status = match sink {
-        None => cmd
+        None => cmd.status().map_err(|e| CommandFailure {
-            .status()
+            error: format!("failed to run '{}': {}", program, e).into(),
-            .map_err(|e| format!("failed to run '{}': {}", program, e))?,
+            stderr: String::new(),
+        })?,
         Some(sink) => {
             cmd.stdout(Stdio::piped()).stderr(Stdio::piped());
-            let mut child = cmd
+            let mut child = cmd.spawn().map_err(|e| CommandFailure {
-                .spawn()
+                error: format!("failed to run '{}': {}", program, e).into(),
-                .map_err(|e| format!("failed to run '{}': {}", program, e))?;
+                stderr: String::new(),
+            })?;
             let stdout = child.stdout.take();
             let stderr = child.stderr.take();
 
@@ -642,37 +838,89 @@ fn run_command(
             // approximate (channel arrival order), acceptable for display.
             let out_sink = sink.clone();
             let err_sink = sink.clone();
+            let err_capture = Arc::clone(&stderr_capture);
             let out_thread = std::thread::spawn(move || {
                 if let Some(out) = stdout {
                     pump(out, Stream::Stdout, &*out_sink);
                 }
             });
             let err_thread = std::thread::spawn(move || {
-                if let Some(err) = stderr {
+                if let Some(stderr) = stderr {
-                    pump(err, Stream::Stderr, &*err_sink);
+                    pump(
+                        stderr,
+                        Stream::Stderr,
+                        &CapturingSink {
+                            inner: err_sink,
+                            capture: err_capture,
+                        },
+                    );
                 }
             });
             let _ = out_thread.join();
             let _ = err_thread.join();
 
-            child
+            child.wait().map_err(|e| CommandFailure {
-                .wait()
+                error: format!("failed to wait for '{}': {}", program, e).into(),
-                .map_err(|e| format!("failed to wait for '{}': {}", program, e))?
+                stderr: String::new(),
+            })?
         }
     };
 
     if !status.success() {
-        return Err(format!(
+        return Err(CommandFailure {
-            "'{} {}' failed with status: {}",
+            error: format!(
-            program,
+                "'{} {}' failed with status: {}",
-            args.join(" "),
+                program,
-            status
+                args.join(" "),
-        )
+                status
-        .into());
+            )
+            .into(),
+            stderr: std::mem::take(&mut stderr_capture.lock().unwrap_or_else(|e| e.into_inner())),
+        });
     }
     Ok(())
 }
 
+/// Run a build command, discarding the captured stderr.
+fn run_command(
+    cwd: &Path,
+    program: &str,
+    args: &[&str],
+    env: &BTreeMap<String, String>,
+    sink: Option<&Arc<dyn LineSink>>,
+) -> Result<(), Box<dyn Error>> {
+    run_command_capturing(cwd, program, args, env, sink).map_err(|failure| failure.error)
+}
+
+/// A [`LineSink`] forwarding every line to the live view while appending
+/// stderr lines to the classification buffer.
+struct CapturingSink {
+    inner: Arc<dyn LineSink>,
+    capture: Arc<std::sync::Mutex<String>>,
+}
+
+const STDERR_CAPTURE_LIMIT: usize = 64 * 1024;
+
+impl LineSink for CapturingSink {
+    fn line(&self, stream: Stream, line: &str) {
+        if stream == Stream::Stderr {
+            let mut buffer = self.capture.lock().unwrap_or_else(|e| e.into_inner());
+            buffer.push_str(line);
+            buffer.push('\n');
+            // Keep the tail: dpkg-source reports the offending path last.
+            if buffer.len() > STDERR_CAPTURE_LIMIT {
+                let cut = buffer.len() - STDERR_CAPTURE_LIMIT;
+                let start = buffer[cut..]
+                    .find('\n')
+                    .map(|index| cut + index + 1)
+                    .unwrap_or(buffer.len());
+                buffer.drain(..start);
+            }
+        }
+        self.inner.line(stream, line);
+    }
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;
@@ -757,6 +1005,118 @@ mod tests {
         assert_eq!(entries.len(), 1);
         assert_eq!(entries[0].name, "hello.tar.xz");
     }
+
+    /// Real-shape `dpkg-source -b` stderr excerpts and their class.
+    #[test]
+    fn dpkg_source_failure_classification() {
+        // Vendored dependencies diverged from the orig-vendor component
+        // (dpkg names the offending paths before the summary line).
+        let vendor = concat!(
+            "dpkg-source: info: building mytool using existing \
+             ./mytool_0.1.0.orig.tar.xz\n",
+            "dpkg-source: info: using source format version 3.0 (quilt)\n",
+            "dpkg-source: error: cannot represent change to \
+             vendor/libc/src/unix/linux_like/mod.rs: binary file contents \
+             changed\n",
+            "dpkg-source: error: unrepresentable changes to source\n",
+        );
+        assert_eq!(
+            classify_dpkg_source_failure(vendor),
+            DpkgSourceFailure::VendorDrift
+        );
+
+        // A missing orig-vendor component makes the vendored files look
+        // "new"; still vendor drift.
+        let missing_component = concat!(
+            "dpkg-source: error: cannot represent change to \
+             vendor/libc/Cargo.toml: new file is binary\n",
+            "dpkg-source: error: unrepresentable changes to source\n",
+        );
+        assert_eq!(
+            classify_dpkg_source_failure(missing_component),
+            DpkgSourceFailure::VendorDrift
+        );
+
+        // The component named in the error is vendor drift too.
+        assert_eq!(
+            classify_dpkg_source_failure(
+                "dpkg-source: error: orig-vendor component tarball \
+                 checksum mismatch\n",
+            ),
+            DpkgSourceFailure::VendorDrift
+        );
+
+        // Upstream tree drift outside vendor/.
+        let upstream = concat!(
+            "dpkg-source: error: cannot represent change to \
+             assets/logo.png: binary file contents changed\n",
+            "dpkg-source: error: unrepresentable changes to source\n",
+        );
+        assert_eq!(
+            classify_dpkg_source_failure(upstream),
+            DpkgSourceFailure::UpstreamDrift
+        );
+        assert_eq!(
+            classify_dpkg_source_failure("dpkg-source: error: unrepresentable changes to source\n"),
+            DpkgSourceFailure::UpstreamDrift
+        );
+
+        // Anything else.
+        assert_eq!(
+            classify_dpkg_source_failure(
+                "dpkg-source: error: syntax error in debian/control at line 3\n"
+            ),
+            DpkgSourceFailure::Other
+        );
+        assert_eq!(classify_dpkg_source_failure(""), DpkgSourceFailure::Other);
+    }
+
+    /// The user-facing wording of the classified failures.
+    #[test]
+    fn dpkg_source_failure_messages() {
+        let vendor = "dpkg-source: error: cannot represent change to \
+                      vendor/serde/src/de/mod.rs: binary file contents changed\n\
+                      dpkg-source: error: unrepresentable changes to source\n";
+        let error = dpkg_source_failure_error(
+            DpkgSourceFailure::VendorDrift,
+            vendor,
+            "'dpkg-source -I -i -b .' failed with status: exit status: 2".into(),
+        );
+        let message = error.to_string();
+        assert!(
+            message.contains("vendored dependencies changed"),
+            "{message}"
+        );
+        assert!(message.contains("orig-vendor"), "{message}");
+        // The offending dpkg line travels along as the detail.
+        assert!(message.contains("vendor/serde/src/de/mod.rs"), "{message}");
+        // Regression: the typed error must SURVIVE the message building, or
+        // the re-vendor retry hook never fires.
+        assert!(error.downcast_ref::<VendorDriftError>().is_some());
+
+        let upstream_error = dpkg_source_failure_error(
+            DpkgSourceFailure::UpstreamDrift,
+            "dpkg-source: error: unrepresentable changes to source\n",
+            "'dpkg-source -I -i -b .' failed with status: exit status: 2".into(),
+        );
+        let message = upstream_error.to_string();
+        assert!(
+            message.contains("drifted beyond the orig snapshot"),
+            "{message}"
+        );
+        assert!(message.contains("pkh chlog"), "{message}");
+
+        // Other: the raw command error passes through untouched.
+        let other = dpkg_source_failure_error(DpkgSourceFailure::Other, "", "boom".into());
+        assert_eq!(other.to_string(), "boom");
+
+        // A vendor-drift error (with or without detail) is recognized by
+        // the retry hook.
+        for detail in [None, Some("dpkg-source: error: nope".to_string())] {
+            let boxed: Box<dyn Error> = Box::new(VendorDriftError { detail });
+            assert!(boxed.downcast_ref::<VendorDriftError>().is_some());
+        }
+    }
 }
 
 /// Differential tests: build synthetic (or real archive) source packages

src/main.rs

@@ -119,7 +119,29 @@ fn main() {
                         .help("Target series (default: the development series of --dist)"),
                 )
                 .arg(arg!(--release "Write the --series into debian/changelog instead of UNRELEASED").required(false))
-                .arg(arg!(--native "Use the 3.0 (native) source format (no orig tarball)").required(false))
+                .arg(arg!(--native "Use the 3.0 (native) source format (default for a new project skeleton: no orig tarball)").required(false))
+                .arg(
+                    clap::Arg::new("quilt")
+                        .long("quilt")
+                        .action(clap::ArgAction::SetTrue)
+                        .conflicts_with("native")
+                        .help("Use the 3.0 (quilt) source format with an orig tarball (default when packaging an existing project)"),
+                )
+                .arg(
+                    clap::Arg::new("orig_from")
+                        .long("orig-from")
+                        .value_name("MODE")
+                        .value_parser(["release", "git", "path", "snapshot"])
+                        .conflicts_with("native")
+                        .help("How to produce the orig tarball (quilt only): release (download the forge tarball of the tag; network), git (git archive of the tag), path (repack --orig-path), snapshot (tar the working tree). Default: git on a tag, snapshot otherwise"),
+                )
+                .arg(
+                    clap::Arg::new("orig_path")
+                        .long("orig-path")
+                        .value_name("FILE|URL")
+                        .conflicts_with("native")
+                        .help("Tarball used by --orig-from path: a local file or an http(s) URL (.tar, .tar.gz, .tgz, .tar.bz2, .tbz2, .tar.xz), repacked to the orig"),
+                )
                 .arg(
                     clap::Arg::new("no_git")
                         .long("no-git")
@@ -273,6 +295,12 @@ fn main() {
                     .get_one::<bool>("native")
                     .copied()
                     .unwrap_or(false),
+                quilt: sub_matches
+                    .get_one::<bool>("quilt")
+                    .copied()
+                    .unwrap_or(false),
+                orig_from: sub_matches.get_one::<String>("orig_from").cloned(),
+                orig_path: sub_matches.get_one::<String>("orig_path").cloned(),
                 git: !sub_matches
                     .get_one::<bool>("no_git")
                     .copied()

src/new/debian.rs

@@ -12,12 +12,13 @@ use chrono::Datelike;
 use tar::Builder;
 use xz2::write::XzEncoder;
 
-use super::options::NewOptions;
+use super::options::{NewOptions, SourceFormat};
 use super::templates::{OutputFile, Template};
 
-/// `3.0 (quilt)` source format, the pkh new default.
+/// `3.0 (quilt)` source format, the default when packaging an existing
+/// project.
 pub const SOURCE_FORMAT_QUILT: &str = "3.0 (quilt)";
-/// `3.0 (native)` source format, selected by `--native`.
+/// `3.0 (native)` source format, the default for a fresh skeleton.
 pub const SOURCE_FORMAT_NATIVE: &str = "3.0 (native)";
 
 /// The three source formats pkh knows how to build.
@@ -59,7 +60,7 @@ pub fn files(opts: &NewOptions, template: &dyn Template) -> Vec<OutputFile> {
         copyright(opts),
         debian_gitignore(opts),
     ];
-    if !opts.native {
+    if opts.source_format == SourceFormat::Quilt {
         files.push(local_options());
     }
     if opts.autopkgtest {
@@ -94,19 +95,13 @@ fn autopkgtest_smoke(opts: &NewOptions) -> OutputFile {
     )
 }
 
-/// `debian/source/format`: `3.0 (quilt)` by default, `3.0 (native)` with
+/// `debian/source/format`: `3.0 (native)` for a skeleton by default,
-/// `--native`.
+/// `3.0 (quilt)` for an existing project; either can be forced with
+/// `--native` / `--quilt`.
 fn source_format(opts: &NewOptions) -> OutputFile {
     OutputFile::new(
         "debian/source/format",
-        format!(
+        format!("{}\n", opts.source_format.deb_string()),
-            "{}\n",
-            if opts.native {
-                SOURCE_FORMAT_NATIVE
-            } else {
-                SOURCE_FORMAT_QUILT
-            }
-        ),
     )
 }
 
@@ -369,6 +364,20 @@ pub fn create_orig_tarball(
     tree: &Path,
     name: &str,
     upstream_version: &str,
+) -> Result<std::path::PathBuf, Box<dyn std::error::Error>> {
+    create_orig_tarball_excluding(tree, name, upstream_version, false)
+}
+
+/// [`create_orig_tarball`] with the generated `vendor/` directory of a
+/// vendored rust package excluded from the snapshot: its contents travel in
+/// the separate `<name>_<uver>.orig-vendor.tar.xz` component instead (see
+/// [`super::orig`]), so they can be regenerated independently of the
+/// upstream sources.
+pub fn create_orig_tarball_excluding(
+    tree: &Path,
+    name: &str,
+    upstream_version: &str,
+    exclude_vendor: bool,
 ) -> Result<std::path::PathBuf, Box<dyn std::error::Error>> {
     let tarball_path = orig_tarball_path(tree, name, upstream_version).ok_or_else(|| {
         format!(
@@ -393,7 +402,8 @@ pub fn create_orig_tarball(
     let prefix = format!("{name}-{upstream_version}");
     // The single top-level directory dpkg-source expects.
     builder.append_dir(&prefix, tree)?;
-    append_tree(&mut builder, tree, &prefix, 0)?;
+    let top_excludes: &[&str] = if exclude_vendor { &["vendor"] } else { &[] };
+    append_tree(&mut builder, tree, &prefix, 0, ORIG_EXCLUDE, top_excludes)?;
 
     builder
         .finish()
@@ -407,12 +417,15 @@ pub fn create_orig_tarball(
 }
 
 /// Recursively append `dir` to the archive under `archive_path`, skipping
-/// the [`ORIG_EXCLUDE`] names and non-regular files.
+/// non-regular files, the names of `excludes` at any depth, the `debian/`
-fn append_tree(
+/// directory and the names of `top_excludes` at the top level (depth 0).
+pub(crate) fn append_tree(
     builder: &mut Builder<XzEncoder<std::fs::File>>,
     dir: &Path,
     archive_path: &str,
     depth: usize,
+    excludes: &[&str],
+    top_excludes: &[&str],
 ) -> Result<(), Box<dyn std::error::Error>> {
     let mut entries: Vec<std::fs::DirEntry> = std::fs::read_dir(dir)?.collect::<Result<_, _>>()?;
     entries.sort_by_key(|entry| entry.file_name());
@@ -422,10 +435,10 @@ fn append_tree(
         let file_name = entry.file_name();
         let name = file_name.to_string_lossy().into_owned();
 
-        if depth == 0 && name == "debian" {
+        if depth == 0 && (name == "debian" || top_excludes.contains(&name.as_str())) {
             continue;
         }
-        if ORIG_EXCLUDE.contains(&name.as_str()) {
+        if excludes.contains(&name.as_str()) {
             continue;
         }
 
@@ -434,7 +447,14 @@ fn append_tree(
             .map_err(|e| format!("cannot stat '{}': {}", path.display(), e))?;
         if metadata.is_dir() {
             builder.append_dir(&entry_archive_path, &path)?;
-            append_tree(builder, &path, &entry_archive_path, depth + 1)?;
+            append_tree(
+                builder,
+                &path,
+                &entry_archive_path,
+                depth + 1,
+                excludes,
+                top_excludes,
+            )?;
         } else if metadata.is_file() {
             // The mode (including the exec bit) travels through the header.
             let mut header = tar::Header::new_gnu();
@@ -502,7 +522,8 @@ mod tests {
             series: "resolute".into(),
             release: false,
             depends: Vec::new(),
-            native: false,
+            source_format: SourceFormat::Quilt,
+            orig: None,
             git: true,
             autopkgtest: false,
             pkg_config: false,
@@ -528,7 +549,7 @@ mod tests {
         );
 
         let native = NewOptions {
-            native: true,
+            source_format: SourceFormat::Native,
             ..opts()
         };
         let files = super::files(
@@ -799,6 +820,44 @@ mod tests {
         assert!(err.to_string().contains("already exists"));
     }
 
+    /// The vendored-rust variant excludes the top-level `vendor/` (it
+    /// travels in the orig-vendor component) but keeps unrelated trees.
+    #[test]
+    fn orig_tarball_vendor_exclusion() {
+        let dir = tempfile::tempdir().unwrap();
+        let tree = dir.path().join("mytool");
+        std::fs::create_dir_all(tree.join("vendor/serde/src")).unwrap();
+        std::fs::create_dir_all(tree.join("src/vendor")).unwrap();
+        std::fs::write(tree.join("vendor/serde/src/lib.rs"), "code").unwrap();
+        std::fs::write(tree.join("src/vendor/mod.rs"), "code").unwrap();
+        std::fs::write(tree.join("Cargo.toml"), "[package]").unwrap();
+
+        let tarball = create_orig_tarball_excluding(&tree, "mytool", "0.1.0", true).unwrap();
+        let mut archive = tar::Archive::new(xz2::read::XzDecoder::new(
+            std::fs::File::open(&tarball).unwrap(),
+        ));
+        let names: Vec<String> = archive
+            .entries()
+            .unwrap()
+            .map(|e| e.unwrap().path().unwrap().to_string_lossy().into_owned())
+            .collect();
+        // The generated vendored tree is out...
+        assert!(
+            !names.iter().any(|n| n.starts_with("mytool-0.1.0/vendor")),
+            "{names:?}"
+        );
+        // ...an unrelated nested vendor/ stays in...
+        assert!(
+            names.iter().any(|n| n == "mytool-0.1.0/src/vendor/mod.rs"),
+            "{names:?}"
+        );
+        // ...and normal files are unaffected.
+        assert!(
+            names.iter().any(|n| n == "mytool-0.1.0/Cargo.toml"),
+            "{names:?}"
+        );
+    }
+
     #[test]
     fn write_files_sets_exec_bit_and_parents() {
         let dir = tempfile::tempdir().unwrap();

src/new/mod.rs

@@ -3,8 +3,9 @@
 //!
 //! This module orchestrates a scaffold run: target directory checks, project
 //! detection, in-memory rendering of every file (all-or-nothing write), the
-//! template post-write hook (e.g. `cargo vendor`), orig tarball creation,
+//! template post-write hook (e.g. `cargo vendor`), orig tarball creation
-//! git initialization, structural verification and the next-steps message.
+//! (from the origin the run decided on — see [`origin`] and [`orig`]), git
+//! initialization, structural verification and the next-steps message.
 //! The interactive wizard ([`questions`]) fills a [`options::NewCli`] from
 //! its answers on a TTY and reuses [`options::resolve`] as the single source
 //! of truth for defaults and validation; without a TTY the same resolution
@@ -14,6 +15,8 @@ pub mod debian;
 pub mod detect;
 pub mod git;
 pub mod options;
+pub mod orig;
+pub mod origin;
 pub mod questions;
 pub mod templates;
 pub mod verify;
@@ -23,7 +26,7 @@ use std::time::Duration;
 
 use indicatif::{MultiProgress, ProgressBar, ProgressStyle};
 
-use options::NewOptions;
+use options::{NewOptions, SourceFormat};
 use templates::{OutputFile, ScaffoldOutcome};
 
 /// Scaffold a full Debian source tree from `opts`.
@@ -64,8 +67,8 @@ pub fn scaffold(
     pb.finish_and_clear();
     multi.remove(&pb);
 
-    if result.is_ok() {
+    if let Ok(outcome) = &result {
-        print_success(&opts);
+        print_success(&opts, outcome);
     }
     result
 }
@@ -127,7 +130,7 @@ fn scaffold_steps(opts: &NewOptions, pb: &ProgressBar) -> Result<ScaffoldOutcome
     }
 
     // Fail before writing anything when the orig tarball already exists.
-    if !opts.native
+    if opts.source_format == SourceFormat::Quilt
         && let Some(tarball) =
             debian::orig_tarball_path(&target, &opts.name, &opts.upstream_version_no_epoch())
         && tarball.exists()
@@ -182,15 +185,34 @@ fn scaffold_steps(opts: &NewOptions, pb: &ProgressBar) -> Result<ScaffoldOutcome
 
     // 5. Template post-write hook: run before the orig tarball is created,
     //    so files added here (rust: vendor/ + .cargo/config.toml) land
-    //    inside it. The outcome (e.g. a failed vendoring) is threaded back
+    //    inside it (or inside the orig-vendor component). The outcome
-    //    to the caller.
+    //    (e.g. a failed vendoring) is threaded back to the caller.
     pb.set_message("Running template hooks");
-    let outcome = template.post_write(opts, &target)?;
+    let mut outcome = template.post_write(opts, &target)?;
 
-    // 6. Orig tarball (quilt only).
+    // 6. Orig tarball (quilt only), from the origin the run decided on.
-    if !opts.native {
+    //    A vendored rust tree gets its `vendor/` directory moved into the
+    //    separate dpkg upstream component `orig-vendor`, regenerable
+    //    independently of the upstream sources (native packages have no
+    //    orig at all: vendor/ simply lives in the tree).
+    if opts.source_format == SourceFormat::Quilt {
         pb.set_message("Creating orig tarball");
-        debian::create_orig_tarball(&target, &opts.name, &opts.upstream_version_no_epoch())?;
+        let vendored_rust =
+            template.id() == options::TemplateId::Rust && orig::has_vendored_dir(&target);
+        let created = orig::create_orig(
+            &target,
+            &opts.name,
+            &opts.upstream_version_no_epoch(),
+            opts.orig
+                .as_ref()
+                .ok_or("internal error: a quilt scaffold needs an orig-tarball plan")?,
+            vendored_rust,
+        )?;
+        outcome.orig_origin = Some(created.label);
+        if vendored_rust {
+            pb.set_message("Creating the orig-vendor component");
+            orig::create_vendor_component(&target, &opts.name, &opts.upstream_version_no_epoch())?;
+        }
     }
 
     // 7. Git.
@@ -205,7 +227,7 @@ fn scaffold_steps(opts: &NewOptions, pb: &ProgressBar) -> Result<ScaffoldOutcome
 }
 
 /// The success message: what was created and the next steps.
-fn print_success(opts: &NewOptions) {
+fn print_success(opts: &NewOptions, outcome: &ScaffoldOutcome) {
     let target =
         opts.target_dir(&std::env::current_dir().unwrap_or_else(|_| std::path::PathBuf::from(".")));
     // `display_path` yields an empty string when the target is the cwd
@@ -226,6 +248,9 @@ fn print_success(opts: &NewOptions) {
         opts.series,
         opts.template
     );
+    if let Some(orig_origin) = &outcome.orig_origin {
+        log::info!("Orig tarball: {orig_origin}");
+    }
     log::info!("Next steps:");
     log::info!("  cd {}", if display.is_empty() { "." } else { &display });
     if opts.release {
@@ -244,11 +269,19 @@ fn print_success(opts: &NewOptions) {
 #[cfg(test)]
 mod tests {
     use super::*;
-    use crate::new::options::{License, SourceDir, TemplateId};
+    use crate::new::options::{License, OrigOrigin, SourceDir, TemplateId};
     use serial_test::serial;
     use tempfile::tempdir;
 
     fn opts(template: TemplateId, name: &str, source_dir: SourceDir) -> NewOptions {
+        // Mirror the resolve() derivation: skeletons are native by default,
+        // existing projects quilt with a working-tree snapshot orig.
+        let (source_format, orig) = match source_dir {
+            SourceDir::Skeleton => (SourceFormat::Native, None),
+            SourceDir::Here | SourceDir::Path(_) => {
+                (SourceFormat::Quilt, Some(OrigOrigin::Snapshot))
+            }
+        };
         NewOptions {
             name: name.to_string(),
             template,
@@ -265,7 +298,8 @@ mod tests {
             series: "resolute".into(),
             release: false,
             depends: Vec::new(),
-            native: false,
+            source_format,
+            orig,
             git: false,
             autopkgtest: false,
             pkg_config: false,
@@ -305,7 +339,6 @@ mod tests {
             "debian/rules",
             "debian/copyright",
             "debian/source/format",
-            "debian/source/local-options",
             "debian/.gitignore",
             "debian/install",
             "mytool.sh",
@@ -340,15 +373,14 @@ mod tests {
         assert_eq!(version, "0.1.0-1");
         assert_eq!(distribution, "UNRELEASED");
 
-        // source/format + local-options.
+        // A fresh skeleton is 3.0 (native) by default: no local-options and
+        // no orig tarball anywhere.
         assert_eq!(
             std::fs::read_to_string(tree.join("debian/source/format")).unwrap(),
-            "3.0 (quilt)\n"
+            "3.0 (native)\n"
-        );
-        assert_eq!(
-            std::fs::read_to_string(tree.join("debian/source/local-options")).unwrap(),
-            "single-debian-patch\n"
         );
+        assert!(!tree.join("debian/source/local-options").exists());
+        assert!(!dir.path().join("mytool_0.1.0.orig.tar.xz").exists());
 
         // install mapping.
         assert_eq!(
@@ -360,6 +392,28 @@ mod tests {
         let gitignore = std::fs::read_to_string(tree.join(".gitignore")).unwrap();
         assert!(gitignore.contains("*.deb"));
         assert!(gitignore.contains("target/"));
+    }
+
+    /// A skeleton forced to quilt keeps the snapshot behavior: orig tarball
+    /// with the skeleton files, `debian/` excluded, local-options present.
+    #[test]
+    #[serial]
+    fn scaffold_skeleton_forced_quilt_snapshots_the_tree() {
+        let dir = tempdir().unwrap();
+        let mut o = opts(TemplateId::Shell, "mytool", SourceDir::Skeleton);
+        o.source_format = SourceFormat::Quilt;
+        o.orig = Some(OrigOrigin::Snapshot);
+        scaffold_in(dir.path(), o).unwrap();
+
+        let tree = dir.path().join("mytool");
+        assert_eq!(
+            std::fs::read_to_string(tree.join("debian/source/format")).unwrap(),
+            "3.0 (quilt)\n"
+        );
+        assert_eq!(
+            std::fs::read_to_string(tree.join("debian/source/local-options")).unwrap(),
+            "single-debian-patch\n"
+        );
 
         // Orig tarball: contains the skeleton file, excludes debian/.
         let tarball = dir.path().join("mytool_0.1.0.orig.tar.xz");
@@ -403,29 +457,11 @@ mod tests {
         );
         assert_eq!(control.binaries[0].get("Architecture"), Some("all"));
         // No install file, no build-system skeleton: the README stub only.
+        // A native skeleton carries no orig tarball: the README simply
+        // lives in the tree.
         assert!(!tree.join("debian/install").exists());
         assert!(tree.join("README").exists());
-        // The tarball excludes debian/ but carries the README.
+        assert!(!dir.path().join("metapkg_0.1.0.orig.tar.xz").exists());
-        let tarball = dir.path().join("metapkg_0.1.0.orig.tar.xz");
-        let mut archive = tar::Archive::new(xz2::read::XzDecoder::new(
-            std::fs::File::open(&tarball).unwrap(),
-        ));
-        let names: Vec<String> = archive
-            .entries()
-            .unwrap()
-            .map(|entry| {
-                entry
-                    .unwrap()
-                    .path()
-                    .unwrap()
-                    .to_string_lossy()
-                    .into_owned()
-            })
-            .collect();
-        assert!(
-            names.iter().any(|n| n == "metapkg-0.1.0/README"),
-            "{names:?}"
-        );
 
         // Empty base flavor: no depends, no Depends field.
         let dir = tempdir().unwrap();
@@ -527,14 +563,13 @@ mod tests {
         .unwrap_err();
         assert!(err.to_string().contains("not empty"), "{err}");
 
-        // Existing orig tarball: nothing gets written.
+        // Existing orig tarball (quilt only): nothing gets written.
         let dir = tempdir().unwrap();
         std::fs::write(dir.path().join("mytool_0.1.0.orig.tar.xz"), b"old").unwrap();
-        let err = scaffold_in(
+        let mut o = opts(TemplateId::Shell, "mytool", SourceDir::Skeleton);
-            dir.path(),
+        o.source_format = SourceFormat::Quilt;
-            opts(TemplateId::Shell, "mytool", SourceDir::Skeleton),
+        o.orig = Some(OrigOrigin::Snapshot);
-        )
+        let err = scaffold_in(dir.path(), o).unwrap_err();
-        .unwrap_err();
         assert!(err.to_string().contains("already exists"), "{err}");
         assert!(!dir.path().join("mytool/debian/control").exists());
 
@@ -552,13 +587,17 @@ mod tests {
         assert!(err.to_string().contains("does not exist"), "{err}");
     }
 
+    /// The skeleton default is `3.0 (native)`: no orig tarball, no
+    /// `debian/source/local-options`.
     #[test]
     #[serial]
-    fn scaffold_native_skips_tarball_and_local_options() {
+    fn scaffold_skeleton_defaults_to_native() {
         let dir = tempdir().unwrap();
-        let mut o = opts(TemplateId::Shell, "nativepkg", SourceDir::Skeleton);
+        scaffold_in(
-        o.native = true;
+            dir.path(),
-        scaffold_in(dir.path(), o).unwrap();
+            opts(TemplateId::Shell, "nativepkg", SourceDir::Skeleton),
+        )
+        .unwrap();
 
         let tree = dir.path().join("nativepkg");
         assert!(!dir.path().join("nativepkg_0.1.0.orig.tar.xz").exists());
@@ -569,17 +608,17 @@ mod tests {
         );
     }
 
-    /// End-to-end rust skeleton: the vendoring hook runs before the orig
+    /// End-to-end rust skeleton: the vendoring hook runs over the tree
-    /// tarball is created, so `.cargo/` (and `vendor/` when dependencies
+    /// (native format: everything simply lives in the tree, no orig
-    /// exist) travel inside it. The vendoring step needs host cargo; on a
+    /// tarball). The vendoring step needs host cargo; on a cargo-less host
-    /// cargo-less host the scaffold still succeeds with a warning and a
+    /// the scaffold still succeeds with a warning and a `vendoring_failed`
-    /// `vendoring_failed` outcome. Keyed against the `RUSTUP_TOOLCHAIN`
+    /// outcome. Keyed against the `RUSTUP_TOOLCHAIN` tests of the rust
-    /// tests of the rust template: they mutate the process-global
+    /// template: they mutate the process-global environment the cargo shim
-    /// environment the cargo shim would pick up mid-vendoring.
+    /// would pick up mid-vendoring.
     #[test]
     #[serial]
     #[serial(RUSTUP_TOOLCHAIN)]
-    fn scaffold_rust_skeleton_vendors_before_tarball() {
+    fn scaffold_rust_skeleton_vendors_into_the_tree() {
         let dir = tempdir().unwrap();
         let outcome = scaffold_in(
             dir.path(),
@@ -589,6 +628,9 @@ mod tests {
 
         let has_cargo = crate::new::templates::find_on_path("cargo").is_some();
         assert_eq!(outcome.vendoring_failed, !has_cargo);
+        // Native skeleton: no orig tarball at all.
+        assert_eq!(outcome.orig_origin, None);
+        assert!(!dir.path().join("mytool_0.1.0.orig.tar.xz").exists());
 
         let tree = dir.path().join("mytool");
         assert!(tree.join("Cargo.toml").exists());
@@ -613,14 +655,60 @@ mod tests {
             Some("debhelper-compat (= 13),\ncargo:native,\nrustc:native")
         );
 
-        // The offline config exists when host cargo vendored the skeleton,
+        // The offline config exists in the tree when host cargo vendored
-        // and both it and the skeleton land inside the orig tarball.
+        // the skeleton.
         if has_cargo {
             let config = std::fs::read_to_string(tree.join(".cargo/config.toml")).unwrap();
             assert!(config.contains("[source.crates-io]"), "{config}");
             assert!(config.contains("[net]\noffline = true"), "{config}");
         }
+    }
 
+    /// End-to-end vendored rust quilt package: the vendoring hook creates
+    /// `vendor/`, the main orig excludes it, the dpkg upstream component
+    /// `orig-vendor` carries it, and the real source build
+    /// (`run_source_build`) lists BOTH tarballs in the `.dsc` and succeeds.
+    /// Needs host cargo with a working crates.io sync (skipped gracefully
+    /// when either is unavailable) and the local dpkg tools.
+    #[test]
+    #[serial]
+    #[serial(RUSTUP_TOOLCHAIN)]
+    fn scaffold_rust_quilt_with_deps_vendors_into_a_component() {
+        let dir = tempdir().unwrap();
+        let source = dir.path().join("mytool");
+        std::fs::create_dir_all(source.join("src")).unwrap();
+        // `libc` resolves from the host's cargo registry cache; vendoring
+        // it needs one crates.io index sync.
+        std::fs::write(
+            source.join("Cargo.toml"),
+            "[package]\n\
+             name = \"mytool\"\n\
+             version = \"0.1.0\"\n\
+             edition = \"2021\"\n\
+             \n\
+             [dependencies]\n\
+             libc = \"0.2\"\n",
+        )
+        .unwrap();
+        std::fs::write(source.join("src/main.rs"), "fn main() {}\n").unwrap();
+
+        let mut o = opts(TemplateId::Rust, "mytool", SourceDir::Path(source.clone()));
+        o.source_format = SourceFormat::Quilt;
+        o.orig = Some(OrigOrigin::Snapshot);
+        let outcome = scaffold_in(dir.path(), o).unwrap();
+
+        if crate::new::templates::find_on_path("cargo").is_none() || outcome.vendoring_failed {
+            // No cargo on this host or the crates.io sync failed: the
+            // vendoring guarantees of this test cannot hold.
+            log::warn!("cargo/crates.io unavailable; skipping the vendored component checks");
+            return;
+        }
+        assert_eq!(
+            outcome.orig_origin,
+            Some("working tree snapshot".to_string())
+        );
+
+        // The main orig excludes vendor/ but carries the upstream files.
         let tarball = dir.path().join("mytool_0.1.0.orig.tar.xz");
         let mut archive = tar::Archive::new(xz2::read::XzDecoder::new(
             std::fs::File::open(&tarball).unwrap(),
@@ -641,21 +729,58 @@ mod tests {
             names.iter().any(|n| n == "mytool-0.1.0/Cargo.toml"),
             "{names:?}"
         );
+        assert!(!names.iter().any(|n| n.contains("vendor")), "{names:?}");
+
+        // The component carries vendor/ under a top-level vendor/ dir.
+        let component = dir.path().join("mytool_0.1.0.orig-vendor.tar.xz");
+        assert!(component.exists());
+        let mut archive = tar::Archive::new(xz2::read::XzDecoder::new(
+            std::fs::File::open(&component).unwrap(),
+        ));
+        let names: Vec<String> = archive
+            .entries()
+            .unwrap()
+            .map(|entry| {
+                entry
+                    .unwrap()
+                    .path()
+                    .unwrap()
+                    .to_string_lossy()
+                    .into_owned()
+            })
+            .collect();
         assert!(
-            names.iter().any(|n| n == "mytool-0.1.0/src/main.rs"),
+            names.iter().any(|n| n.starts_with("vendor/libc/")),
             "{names:?}"
         );
-        if has_cargo {
+
-            assert!(
+        // The real source build: the .dsc references both tarballs.
-                names.iter().any(|n| n == "mytool-0.1.0/.cargo/config.toml"),
+        let output = crate::build::run_source_build(
-                "{names:?}"
+            &source,
-            );
+            &crate::build::SourceBuildOptions::default(),
-        }
+            None,
-        assert!(!names.iter().any(|n| n.contains("debian")), "{names:?}");
+        )
+        .unwrap();
+        let dsc = std::fs::read_to_string(&output.dsc).unwrap();
+        assert!(dsc.contains("mytool_0.1.0.orig.tar.xz"), "{dsc}");
+        assert!(dsc.contains("mytool_0.1.0.orig-vendor.tar.xz"), "{dsc}");
+        assert!(
+            output
+                .tarballs
+                .iter()
+                .any(|t| t.ends_with("mytool_0.1.0.orig.tar.xz"))
+        );
+        assert!(
+            output
+                .tarballs
+                .iter()
+                .any(|t| t.ends_with("mytool_0.1.0.orig-vendor.tar.xz"))
+        );
+        assert!(!output.signed);
     }
 
-    /// End-to-end python skeleton: pyproject-based Build-Depends and the
+    /// End-to-end python skeleton: pyproject-based Build-Depends (native
-    /// module skeleton inside the orig tarball.
+    /// skeleton: the upstream files live in the tree, no orig tarball).
     #[test]
     #[serial]
     fn scaffold_python_skeleton_tree() {
@@ -679,44 +804,22 @@ mod tests {
         let rules = std::fs::read_to_string(tree.join("debian/rules")).unwrap();
         assert!(rules.contains("%:\n\tdh $@ --with python3 --buildsystem=pybuild\n"));
 
-        let tarball = dir.path().join("mytool_0.1.0.orig.tar.xz");
+        assert!(tree.join("pyproject.toml").exists());
-        let mut archive = tar::Archive::new(xz2::read::XzDecoder::new(
+        assert!(tree.join("mytool/__init__.py").exists());
-            std::fs::File::open(&tarball).unwrap(),
+        assert!(!dir.path().join("mytool_0.1.0.orig.tar.xz").exists());
-        ));
-        let names: Vec<String> = archive
-            .entries()
-            .unwrap()
-            .map(|entry| {
-                entry
-                    .unwrap()
-                    .path()
-                    .unwrap()
-                    .to_string_lossy()
-                    .into_owned()
-            })
-            .collect();
-        assert!(
-            names.iter().any(|n| n == "mytool-0.1.0/pyproject.toml"),
-            "{names:?}"
-        );
-        assert!(
-            names.iter().any(|n| n == "mytool-0.1.0/mytool/__init__.py"),
-            "{names:?}"
-        );
     }
 
-    /// End-to-end: the scaffolded shell tree passes the real source build
+    /// End-to-end: a quilt tree (Here mode over an existing source) passes
-    /// (`dpkg-source` and friends, same prerequisites as the differential
+    /// the real source build (`dpkg-source` and friends, same prerequisites
-    /// tests).
+    /// as the differential tests).
     #[test]
     #[serial]
     fn scaffold_then_source_build_produces_artifacts() {
         let dir = tempdir().unwrap();
-        scaffold_in(
+        let tree = dir.path().join("mytool");
-            dir.path(),
+        std::fs::create_dir_all(&tree).unwrap();
-            opts(TemplateId::Shell, "mytool", SourceDir::Skeleton),
+        std::fs::write(tree.join("run.sh"), "#!/bin/sh\necho hi\n").unwrap();
-        )
+        scaffold_in(&tree, opts(TemplateId::Shell, "mytool", SourceDir::Here)).unwrap();
-        .unwrap();
 
         let output = crate::build::run_source_build(
             &dir.path().join("mytool"),
@@ -736,4 +839,36 @@ mod tests {
         // UNRELEASED: nothing is signed.
         assert!(!output.signed);
     }
+
+    /// End-to-end native: a self-authored skeleton (3.0 (native), no orig
+    /// tarball) builds into a .dsc without any tarball at all.
+    #[test]
+    #[serial]
+    fn scaffold_native_then_source_build_needs_no_tarball() {
+        let dir = tempdir().unwrap();
+        scaffold_in(
+            dir.path(),
+            opts(TemplateId::Shell, "mytool", SourceDir::Skeleton),
+        )
+        .unwrap();
+
+        let output = crate::build::run_source_build(
+            &dir.path().join("mytool"),
+            &crate::build::SourceBuildOptions::default(),
+            None,
+        )
+        .unwrap();
+        assert!(output.dsc.exists(), "{:?} missing", output.dsc);
+        assert!(output.changes.exists(), "{:?} missing", output.changes);
+        // 3.0 (native): one self-contained source tarball (debian/ inside),
+        // but no ORIG tarball.
+        assert_eq!(output.tarballs.len(), 1, "{:?}", output.tarballs);
+        assert!(
+            !output.tarballs[0]
+                .file_name()
+                .is_some_and(|name| name.to_string_lossy().contains("orig")),
+            "{:?}",
+            output.tarballs
+        );
+    }
 }

src/new/options.rs

@@ -15,6 +15,8 @@ use crate::debian::DebianVersion;
 use crate::debian::deps::{Deps, ParseOpts};
 use crate::distro_info;
 use crate::new::detect::{self, Detection};
+use crate::new::origin::{Forge, GitOrigin};
+use crate::new::templates;
 
 /// Build systems / project kinds `pkh new` knows about.
 ///
@@ -133,6 +135,82 @@ pub enum SourceDir {
     Path(PathBuf),
 }
 
+impl SourceDir {
+    /// The directory being packaged, when it already exists on disk (`None`
+    /// for the skeleton mode, whose sources are rendered in memory).
+    pub fn existing_dir(&self, cwd: &Path) -> Option<PathBuf> {
+        match self {
+            SourceDir::Skeleton => None,
+            SourceDir::Here => Some(cwd.to_path_buf()),
+            SourceDir::Path(path) => Some(path.clone()),
+        }
+    }
+}
+
+/// Debian source format of the scaffolded package: an explicit, derived
+/// choice rather than a boolean afterthought.
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub enum SourceFormat {
+    /// `3.0 (native)`: no orig tarball at all. The default for a fresh,
+    /// self-authored skeleton.
+    Native,
+    /// `3.0 (quilt)`: upstream sources in the orig tarball, packaging in
+    /// `debian/`. The default when packaging an existing project.
+    Quilt,
+}
+
+impl SourceFormat {
+    /// The value written to `debian/source/format`.
+    pub fn deb_string(&self) -> &'static str {
+        match self {
+            SourceFormat::Native => super::debian::SOURCE_FORMAT_NATIVE,
+            SourceFormat::Quilt => super::debian::SOURCE_FORMAT_QUILT,
+        }
+    }
+}
+
+/// How the orig tarball of a quilt package is produced. The right answer
+/// depends on where the upstream sources come from, so the wizard offers
+/// them pre-ordered by what git origin detection found (release download
+/// and `git archive` only exist when HEAD sits exactly on a tag).
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub enum OrigOrigin {
+    /// Download the upstream release tarball of `tag` from the forge of the
+    /// `origin` remote and repack it (explicit network consent).
+    Release {
+        /// Release tag the tarball is downloaded for.
+        tag: String,
+        /// Forge the tarball is downloaded from.
+        forge: Forge,
+    },
+    /// `git archive` the tag HEAD sits on: offline and deterministic.
+    GitArchive {
+        /// Release tag archived into the tarball.
+        tag: String,
+    },
+    /// Repack a tarball the user provides (a local path or an http(s) URL).
+    Provided {
+        /// Path or URL of the user-provided tarball.
+        source: String,
+    },
+    /// Snapshot the working tree into the orig tarball (the only option for
+    /// a skeleton, and the fallback when the upstream history is unknown).
+    Snapshot,
+}
+
+impl OrigOrigin {
+    /// Human-readable description used in the wizard summary and the
+    /// post-scaffold report.
+    pub fn label(&self) -> String {
+        match self {
+            OrigOrigin::Release { tag, .. } => format!("release download ({tag})"),
+            OrigOrigin::GitArchive { tag } => format!("git archive ({tag})"),
+            OrigOrigin::Provided { source } => format!("user tarball ({source})"),
+            OrigOrigin::Snapshot => "working tree snapshot".to_string(),
+        }
+    }
+}
+
 /// Upstream license of the package: a curated SPDX list plus a free-text
 /// fallback for anything else (including "unknown" until the user picks one).
 #[derive(Debug, Clone, PartialEq, Eq)]
@@ -242,8 +320,13 @@ pub struct NewOptions {
     /// Runtime Depends clauses of the metapackage flavor (canonically
     /// rendered; empty for every other flavor).
     pub depends: Vec<String>,
-    /// Use the `3.0 (native)` source format (no orig tarball).
+    /// Debian source format: `3.0 (native)` for a fresh skeleton by
-    pub native: bool,
+    /// default, `3.0 (quilt)` when packaging an existing project; either
+    /// can be forced with `--native` / `--quilt`.
+    pub source_format: SourceFormat,
+    /// How the orig tarball is produced (quilt only; `None` with the native
+    /// format, which has no orig tarball).
+    pub orig: Option<OrigOrigin>,
     /// Initialize a git repository (gitignores are written regardless).
     pub git: bool,
     /// Write the autopkgtest smoke test (`debian/tests/control` +
@@ -320,6 +403,12 @@ pub struct NewCli {
     pub release: bool,
     /// `--native`.
     pub native: bool,
+    /// `--quilt` (mutually exclusive with `--native`).
+    pub quilt: bool,
+    /// `--orig-from <release|git|path|snapshot>`.
+    pub orig_from: Option<String>,
+    /// `--orig-path <file|url>` (required by `--orig-from path`).
+    pub orig_path: Option<String>,
     /// True unless `--no-git`.
     pub git: bool,
     /// `--defaults`.
@@ -604,11 +693,65 @@ pub async fn resolve(cli: NewCli) -> Result<NewOptions, String> {
     // Everything below has a default and is validated as it is resolved.
     validate_source_name(&name)?;
 
-    let upstream_version = cli.upstream_version.unwrap_or_else(|| "0.1.0".to_string());
+    // Source format: explicit flags win (--native / --quilt, mutually
+    // exclusive), otherwise the mode decides — a fresh, self-authored
+    // skeleton is native by default, an existing project is quilt.
+    let source_format = match (cli.native, cli.quilt) {
+        (true, true) => {
+            return Err("--native and --quilt are mutually exclusive".to_string());
+        }
+        (true, false) => SourceFormat::Native,
+        (false, true) => SourceFormat::Quilt,
+        (false, false) => match source_dir {
+            SourceDir::Skeleton => SourceFormat::Native,
+            SourceDir::Here | SourceDir::Path(_) => SourceFormat::Quilt,
+        },
+    };
+
+    // Git origin state of the packaged directory: needed for the version
+    // default (tag / +git scheme) and for the orig-tarball plan. Probing is
+    // purely local (git config and refs, no network).
+    let existing_dir = source_dir.existing_dir(&std::env::current_dir().unwrap_or_default());
+    let needs_origin = cli.upstream_version.is_none()
+        || (source_format == SourceFormat::Quilt
+            && (cli.orig_from.is_some() || existing_dir.is_some()));
+    let origin = if needs_origin {
+        existing_dir.as_deref().and_then(GitOrigin::detect)
+    } else {
+        None
+    };
+
+    // Upstream version default: probed project version, else the tag HEAD
+    // sits on, else `<lasttag>+git<YYYYMMDD>.<hash>`, else 0.1.0.
+    let upstream_version = match cli.upstream_version {
+        Some(ref version) => version.clone(),
+        None => {
+            let probed = template
+                .and_then(templates::get)
+                .and_then(|t| t.probe(existing_dir.as_deref()?))
+                .and_then(|probe| probe.version)
+                .filter(|version| {
+                    validate_upstream_version(version, cli.revision.unwrap_or(1)).is_ok()
+                });
+            let derived = probed
+                .or_else(|| origin.as_ref().and_then(GitOrigin::head_tag_version))
+                .or_else(|| origin.as_ref().and_then(GitOrigin::git_version))
+                .unwrap_or_else(|| "0.1.0".to_string());
+            if derived != "0.1.0" {
+                log::info!("No --upstream-version given, defaulting to '{derived}'");
+            }
+            derived
+        }
+    };
     let revision = cli.revision.unwrap_or(1);
     validate_upstream_version(&upstream_version, revision)
         .map_err(|e| format!("Invalid upstream version: {e}"))?;
 
+    // Orig-tarball plan (quilt only). Without an explicit --orig-from the
+    // non-interactive default never touches the network: `git archive` of
+    // the tag when HEAD sits on one, a working-tree snapshot otherwise.
+    let orig = resolve_orig_origin(&cli, &source_dir, source_format, origin.as_ref())?;
+
     let homepage = match &cli.homepage {
         Some(h) => {
             validate_homepage(h)?;
@@ -673,7 +816,8 @@ pub async fn resolve(cli: NewCli) -> Result<NewOptions, String> {
         series,
         release: cli.release,
         depends,
-        native: cli.native,
+        source_format,
+        orig,
         git: cli.git,
         autopkgtest: false,
         pkg_config: false,
@@ -681,6 +825,111 @@ pub async fn resolve(cli: NewCli) -> Result<NewOptions, String> {
     })
 }
 
+/// Resolve the orig-tarball plan of a quilt scaffold from the CLI answers
+/// and the detected git origin. Fails early with a pointed message when an
+/// explicit `--orig-from` mode cannot apply to this tree; the implicit,
+/// non-interactive default never touches the network (`git archive` of the
+/// tag when HEAD sits exactly on one, a working-tree snapshot otherwise).
+fn resolve_orig_origin(
+    cli: &NewCli,
+    source_dir: &SourceDir,
+    source_format: SourceFormat,
+    origin: Option<&GitOrigin>,
+) -> Result<Option<OrigOrigin>, String> {
+    if source_format == SourceFormat::Native {
+        if cli.orig_from.is_some() || cli.orig_path.is_some() {
+            return Err(
+                "--orig-from/--orig-path need a quilt package (drop --native \
+                 or pass --quilt to build with an orig tarball)"
+                    .to_string(),
+            );
+        }
+        return Ok(None);
+    }
+
+    let skeleton = matches!(source_dir, SourceDir::Skeleton);
+    let head_tag = || origin.and_then(|o| o.head_tag.clone());
+
+    let plan = match cli.orig_from.as_deref() {
+        Some("snapshot") => OrigOrigin::Snapshot,
+        Some("path") => {
+            let source = cli.orig_path.clone().ok_or_else(|| {
+                "--orig-from path requires --orig-path <tarball file or URL>".to_string()
+            })?;
+            validate_orig_path(&source)?;
+            OrigOrigin::Provided { source }
+        }
+        Some("git") => {
+            if skeleton {
+                return Err("a fresh skeleton has no upstream git history; use \
+                     --orig-from snapshot (or drop --quilt)"
+                    .to_string());
+            }
+            match head_tag() {
+                Some(tag) => OrigOrigin::GitArchive { tag },
+                None => {
+                    return Err("--orig-from git requires HEAD to be exactly on a \
+                         release tag"
+                        .to_string());
+                }
+            }
+        }
+        Some("release") => {
+            if skeleton {
+                return Err("a fresh skeleton has no upstream release to download; \
+                     use --orig-from snapshot (or drop --quilt)"
+                    .to_string());
+            }
+            let Some(tag) = head_tag() else {
+                return Err("--orig-from release requires HEAD to be exactly on a \
+                     release tag"
+                    .to_string());
+            };
+            let forge = origin.and_then(|o| o.forge.clone()).ok_or_else(|| {
+                "--orig-from release needs a github.com or gitlab.com origin \
+                 remote (self-hosted forges are not recognized)"
+                    .to_string()
+            })?;
+            OrigOrigin::Release { tag, forge }
+        }
+        Some(other) => {
+            return Err(format!(
+                "Unknown --orig-from value '{other}'. Supported: release, \
+                 git, path, snapshot."
+            ));
+        }
+        None => {
+            // Skeletons (and anything without an upstream history) can only
+            // be snapshotted; on a tag, git archive is the offline default.
+            match (skeleton, head_tag()) {
+                (false, Some(tag)) => OrigOrigin::GitArchive { tag },
+                _ => OrigOrigin::Snapshot,
+            }
+        }
+    };
+
+    if cli.orig_path.is_some() && !matches!(plan, OrigOrigin::Provided { .. }) {
+        return Err("--orig-path is only valid together with --orig-from path".to_string());
+    }
+    Ok(Some(plan))
+}
+
+/// Validate a `--orig-path` value (and the wizard's tarball answer): either
+/// an http(s) URL (downloaded at scaffold time) or an existing local
+/// tarball.
+pub fn validate_orig_path(source: &str) -> Result<(), String> {
+    if source.starts_with("http://") || source.starts_with("https://") {
+        return Ok(());
+    }
+    if Path::new(source).is_file() {
+        return Ok(());
+    }
+    Err(format!(
+        "'{source}' is not an http(s) URL and not an existing file: \
+         --orig-path must point at a tarball to repack"
+    ))
+}
+
 /// Set of names no template may produce twice (collision check).
 pub(crate) fn check_file_collisions(paths: &[String]) -> Result<(), String> {
     let mut seen: HashSet<&String> = HashSet::new();
@@ -788,7 +1037,8 @@ mod tests {
             series: "sid".into(),
             release: false,
             depends: Vec::new(),
-            native: false,
+            source_format: SourceFormat::Quilt,
+            orig: None,
             git: false,
             autopkgtest: false,
             pkg_config: false,
@@ -937,6 +1187,10 @@ mod tests {
         assert_eq!(opts.depends, vec!["hello (>= 1.0)", "hello-data"]);
         assert!(opts.git);
         assert!(!opts.release);
+        // An existing project (Path mode) is quilt by default; an empty,
+        // non-git directory has no better orig plan than a tree snapshot.
+        assert_eq!(opts.source_format, SourceFormat::Quilt);
+        assert_eq!(opts.orig, Some(OrigOrigin::Snapshot));
         // Series: the development series of the current vendor (lowercased,
         // matching the distro-info keys).
         let dist = crate::build::env::current_vendor().to_lowercase();
@@ -979,4 +1233,316 @@ mod tests {
         let err = resolve(cli).await.unwrap_err();
         assert!(err.contains("--release requires --series"), "{err}");
     }
+
+    /// Minimal CLI answers for a scripted source directory.
+    fn cli_for(dir: &std::path::Path) -> NewCli {
+        NewCli {
+            name: Some("mytool".into()),
+            source: Some(dir.to_path_buf()),
+            lang: Some("empty".into()),
+            description: Some("A tool".into()),
+            maintainer: Some("Jane <jane@example.com>".into()),
+            git: true,
+            ..Default::default()
+        }
+    }
+
+    /// A git repo fixture: init, commit, optional tag, optional extra
+    /// commit (needs the git CLI; returns (repo dir, HEAD short hash)).
+    fn git_repo(tag: Option<&str>, second_commit: bool) -> (tempfile::TempDir, String) {
+        let run = |dir: &std::path::Path, args: &[&str]| {
+            let status = std::process::Command::new("git")
+                .args([
+                    "-c",
+                    "user.name=T",
+                    "-c",
+                    "user.email=t@example.invalid",
+                    "-c",
+                    "commit.gpgsign=false",
+                ])
+                .args(args)
+                .current_dir(dir)
+                .status()
+                .expect("git should be runnable");
+            assert!(status.success(), "git {args:?} failed");
+        };
+        let dir = tempfile::tempdir().unwrap();
+        run(dir.path(), &["init", "-q"]);
+        std::fs::write(dir.path().join("f"), "one\n").unwrap();
+        run(dir.path(), &["add", "f"]);
+        run(dir.path(), &["commit", "-q", "-m", "first"]);
+        if let Some(tag) = tag {
+            run(dir.path(), &["tag", tag]);
+        }
+        if second_commit {
+            std::fs::write(dir.path().join("f"), "two\n").unwrap();
+            run(dir.path(), &["add", "f"]);
+            run(dir.path(), &["commit", "-q", "-m", "second"]);
+        }
+        let hash = std::process::Command::new("git")
+            .args(["rev-parse", "--short", "HEAD"])
+            .current_dir(dir.path())
+            .output()
+            .unwrap();
+        let hash = String::from_utf8_lossy(&hash.stdout).trim().to_string();
+        (dir, hash)
+    }
+
+    #[tokio::test]
+    async fn resolve_skeleton_is_native_without_orig_tarball() {
+        // A self-authored skeleton defaults to 3.0 (native): no orig
+        // tarball, no orig plan.
+        let cli = NewCli {
+            name: Some("mytool".into()),
+            lang: Some("shell".into()),
+            description: Some("A tool".into()),
+            maintainer: Some("Jane <jane@example.com>".into()),
+            git: true,
+            ..Default::default()
+        };
+        let opts = resolve(cli).await.unwrap();
+        assert_eq!(opts.source_format, SourceFormat::Native);
+        assert_eq!(opts.orig, None);
+    }
+
+    #[tokio::test]
+    async fn resolve_skeleton_forced_quilt_snapshots_the_tree() {
+        let cli = NewCli {
+            name: Some("mytool".into()),
+            lang: Some("shell".into()),
+            description: Some("A tool".into()),
+            maintainer: Some("Jane <jane@example.com>".into()),
+            quilt: true,
+            git: true,
+            ..Default::default()
+        };
+        let opts = resolve(cli).await.unwrap();
+        assert_eq!(opts.source_format, SourceFormat::Quilt);
+        assert_eq!(opts.orig, Some(OrigOrigin::Snapshot));
+    }
+
+    #[tokio::test]
+    async fn resolve_skeleton_rejects_history_dependent_orig_modes() {
+        // A skeleton has no upstream git history: only the snapshot mode
+        // makes sense.
+        for mode in ["git", "release"] {
+            let cli = NewCli {
+                name: Some("mytool".into()),
+                lang: Some("shell".into()),
+                description: Some("A tool".into()),
+                maintainer: Some("Jane <jane@example.com>".into()),
+                quilt: true,
+                orig_from: Some(mode.to_string()),
+                git: true,
+                ..Default::default()
+            };
+            let err = resolve(cli).await.unwrap_err();
+            assert!(err.contains("no upstream"), "{mode}: {err}");
+        }
+    }
+
+    #[tokio::test]
+    async fn resolve_existing_project_forced_native() {
+        let dir = tempfile::tempdir().unwrap();
+        let mut cli = cli_for(dir.path());
+        cli.native = true;
+        let opts = resolve(cli).await.unwrap();
+        assert_eq!(opts.source_format, SourceFormat::Native);
+        assert_eq!(opts.orig, None);
+    }
+
+    #[tokio::test]
+    async fn resolve_native_and_quilt_conflict() {
+        let cli = NewCli {
+            name: Some("mytool".into()),
+            lang: Some("shell".into()),
+            description: Some("A tool".into()),
+            maintainer: Some("Jane <jane@example.com>".into()),
+            native: true,
+            quilt: true,
+            ..Default::default()
+        };
+        let err = resolve(cli).await.unwrap_err();
+        assert!(err.contains("mutually exclusive"), "{err}");
+    }
+
+    #[tokio::test]
+    async fn resolve_head_on_tag_defaults_to_git_archive_and_tag_version() {
+        if std::process::Command::new("git")
+            .arg("--version")
+            .output()
+            .is_err()
+        {
+            return;
+        }
+        let (dir, _hash) = git_repo(Some("v1.2.3"), false);
+        let opts = resolve(cli_for(dir.path())).await.unwrap();
+
+        assert_eq!(opts.source_format, SourceFormat::Quilt);
+        // Version default: the tag version, not 0.1.0.
+        assert_eq!(opts.upstream_version, "1.2.3");
+        // Non-interactive orig default on a tag: git archive (no network).
+        assert_eq!(
+            opts.orig,
+            Some(OrigOrigin::GitArchive {
+                tag: "v1.2.3".to_string()
+            })
+        );
+    }
+
+    #[tokio::test]
+    async fn resolve_between_releases_snapshots_with_git_version() {
+        if std::process::Command::new("git")
+            .arg("--version")
+            .output()
+            .is_err()
+        {
+            return;
+        }
+        let (dir, _hash) = git_repo(Some("v1.2.3"), true);
+        let opts = resolve(cli_for(dir.path())).await.unwrap();
+
+        let expected = crate::new::origin::GitOrigin::detect(dir.path())
+            .unwrap()
+            .git_version()
+            .unwrap();
+        assert_eq!(opts.upstream_version, expected);
+        assert!(opts.upstream_version.starts_with("1.2.3+git"));
+        assert_eq!(opts.orig, Some(OrigOrigin::Snapshot));
+    }
+
+    #[tokio::test]
+    async fn resolve_probed_project_version_beats_the_tag() {
+        if std::process::Command::new("git")
+            .arg("--version")
+            .output()
+            .is_err()
+        {
+            return;
+        }
+        let (dir, _) = git_repo(Some("v9.9.9"), false);
+        // A Cargo.toml without src/ makes `cargo metadata` fail, so the
+        // template probe falls back to its deterministic line parse.
+        std::fs::write(
+            dir.path().join("Cargo.toml"),
+            "[package]\nname = \"x\"\nversion = \"3.3.3\"\n",
+        )
+        .unwrap();
+        let mut cli = cli_for(dir.path());
+        cli.lang = Some("rust".into());
+        let opts = resolve(cli).await.unwrap();
+        assert_eq!(opts.upstream_version, "3.3.3");
+        // The orig plan still comes from the tag.
+        assert_eq!(
+            opts.orig,
+            Some(OrigOrigin::GitArchive {
+                tag: "v9.9.9".to_string()
+            })
+        );
+    }
+
+    #[tokio::test]
+    async fn resolve_orig_from_modes() {
+        if std::process::Command::new("git")
+            .arg("--version")
+            .output()
+            .is_err()
+        {
+            return;
+        }
+        let (dir, _) = git_repo(Some("v1.2.3"), false);
+
+        // snapshot is always allowed.
+        let mut cli = cli_for(dir.path());
+        cli.orig_from = Some("snapshot".into());
+        assert_eq!(resolve(cli).await.unwrap().orig, Some(OrigOrigin::Snapshot));
+
+        // release requires a recognized forge remote.
+        let mut cli = cli_for(dir.path());
+        cli.orig_from = Some("release".into());
+        let err = resolve(cli).await.unwrap_err();
+        assert!(err.contains("github.com or gitlab.com"), "{err}");
+
+        // After adding a recognized remote the release plan resolves.
+        std::process::Command::new("git")
+            .args(["remote", "add", "origin", "https://github.com/foo/bar.git"])
+            .current_dir(dir.path())
+            .status()
+            .unwrap()
+            .success()
+            .then_some(())
+            .unwrap();
+        let mut cli = cli_for(dir.path());
+        cli.orig_from = Some("release".into());
+        assert_eq!(
+            resolve(cli).await.unwrap().orig,
+            Some(OrigOrigin::Release {
+                tag: "v1.2.3".to_string(),
+                forge: crate::new::origin::Forge::GitHub {
+                    owner: "foo".into(),
+                    repo: "bar".into()
+                }
+            })
+        );
+
+        // path requires --orig-path, and an existing file or a URL.
+        let mut cli = cli_for(dir.path());
+        cli.orig_from = Some("path".into());
+        let err = resolve(cli).await.unwrap_err();
+        assert!(err.contains("--orig-path"), "{err}");
+
+        let tarball = dir.path().join("upstream.tar.gz");
+        std::fs::write(&tarball, b"not really a tarball").unwrap();
+        let mut cli = cli_for(dir.path());
+        cli.orig_from = Some("path".into());
+        cli.orig_path = Some(tarball.to_string_lossy().into_owned());
+        assert_eq!(
+            resolve(cli).await.unwrap().orig,
+            Some(OrigOrigin::Provided {
+                source: tarball.to_string_lossy().into_owned()
+            })
+        );
+
+        let mut cli = cli_for(dir.path());
+        cli.orig_from = Some("path".into());
+        cli.orig_path = Some("https://example.com/upstream.tar.gz".into());
+        assert_eq!(
+            resolve(cli).await.unwrap().orig,
+            Some(OrigOrigin::Provided {
+                source: "https://example.com/upstream.tar.gz".to_string()
+            })
+        );
+
+        // A missing local path is rejected early.
+        let mut cli = cli_for(dir.path());
+        cli.orig_from = Some("path".into());
+        cli.orig_path = Some(
+            dir.path()
+                .join("missing.tar.gz")
+                .to_string_lossy()
+                .into_owned(),
+        );
+        let err = resolve(cli).await.unwrap_err();
+        assert!(err.contains("not an http(s) URL"), "{err}");
+
+        // --orig-path without --orig-from path is a misuse.
+        let mut cli = cli_for(dir.path());
+        cli.orig_path = Some(tarball.to_string_lossy().into_owned());
+        let err = resolve(cli).await.unwrap_err();
+        assert!(err.contains("only valid together"), "{err}");
+
+        // git requires HEAD exactly on a tag.
+        let (off, _) = git_repo(Some("v1.0.0"), true);
+        let mut cli = cli_for(off.path());
+        cli.orig_from = Some("git".into());
+        let err = resolve(cli).await.unwrap_err();
+        assert!(err.contains("exactly on a release tag"), "{err}");
+
+        // ... and the orig flags need quilt.
+        let mut cli = cli_for(dir.path());
+        cli.native = true;
+        cli.orig_from = Some("git".into());
+        let err = resolve(cli).await.unwrap_err();
+        assert!(err.contains("need a quilt package"), "{err}");
+    }
 }

src/new/origin.rs

@@ -0,0 +1,533 @@
+//! Best-effort git origin detection for `pkh new`.
+//!
+//! [`GitOrigin::detect`] inspects the source directory through the `git`
+//! CLI (fail-soft: any failed query just leaves the corresponding field
+//! empty, and a non-repo yields `None`) and answers the questions driving
+//! the source-format and orig-tarball decisions:
+//!
+//! - is HEAD exactly on a tag, and which upstream version does it name,
+//! - which is the last tag reachable from HEAD (for the
+//!   `<tag>+git<YYYYMMDD>.<hash>` version scheme),
+//! - where does the `origin` remote point: only `github.com` and
+//!   `gitlab.com` are recognized as forges — self-hosted GitLab instances
+//!   are deliberately not (the release-download URL shapes differ).
+//!
+//! Detection never touches the network: adding a remote stores its URL in
+//! the local config only, which is all this module reads.
+
+use std::path::Path;
+use std::process::Command;
+
+/// A forge hosting the project, parsed from the `origin` remote URL.
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub enum Forge {
+    /// `github.com/<owner>/<repo>`
+    GitHub {
+        /// Repository owner (user or organization).
+        owner: String,
+        /// Repository name, without the `.git` suffix.
+        repo: String,
+    },
+    /// `gitlab.com/<owner>/<repo>`
+    GitLab {
+        /// Repository owner (user or group).
+        owner: String,
+        /// Repository name, without the `.git` suffix.
+        repo: String,
+    },
+}
+
+impl Forge {
+    /// Host name of the forge.
+    pub fn host(&self) -> &'static str {
+        match self {
+            Forge::GitHub { .. } => "github.com",
+            Forge::GitLab { .. } => "gitlab.com",
+        }
+    }
+
+    /// Parse a remote URL into a [`Forge`], accepting the `https://`,
+    /// `http://`, `git://` and `git@host:` spellings. Only `github.com` and
+    /// `gitlab.com` are recognized; anything else (self-hosted GitLab,
+    /// Bitbucket, plain URLs…) yields `None`.
+    pub fn parse(url: &str) -> Option<Forge> {
+        let url = url.trim();
+        // Normalize `git@host:path` to `host/path` and strip any scheme.
+        let (host, path) = match url.split_once("://") {
+            Some((_scheme, rest)) => rest.split_once('/')?,
+            None => {
+                let (scp, path) = url.split_once(':')?;
+                let host = scp.strip_prefix("git@").unwrap_or(scp);
+                (host, path)
+            }
+        };
+        let host = host.to_ascii_lowercase();
+        // Drop the leading user part of ssh URLs (`git@github.com` handled
+        // above; `ssh://git@github.com/path` keeps `git@github.com` here).
+        let host = host.rsplit('@').next().unwrap_or(&host);
+        let mut segments = path
+            .trim_end_matches('/')
+            .trim_end_matches(".git")
+            .split('/');
+        let owner = segments.next()?;
+        let repo = segments.next()?;
+        if owner.is_empty() || repo.is_empty() {
+            return None;
+        }
+        match host {
+            "github.com" => Some(Forge::GitHub {
+                owner: owner.to_string(),
+                repo: repo.to_string(),
+            }),
+            "gitlab.com" => Some(Forge::GitLab {
+                owner: owner.to_string(),
+                repo: repo.to_string(),
+            }),
+            _ => None,
+        }
+    }
+
+    /// Release-tarball URLs of `tag`, best candidate first. GitHub prefers
+    /// the codeload direct link (no redirect) and falls back to the
+    /// `github.com` archive URL; GitLab has a single archive URL.
+    pub fn release_tarball_urls(&self, tag: &str) -> Vec<String> {
+        match self {
+            Forge::GitHub { owner, repo } => vec![
+                format!("https://codeload.github.com/{owner}/{repo}/tar.gz/refs/tags/{tag}"),
+                format!("https://github.com/{owner}/{repo}/archive/refs/tags/{tag}.tar.gz"),
+            ],
+            Forge::GitLab { owner, repo } => {
+                vec![format!(
+                    "https://gitlab.com/{owner}/{repo}/-/archive/{tag}/{repo}-{tag}.tar.gz"
+                )]
+            }
+        }
+    }
+}
+
+/// Best-effort snapshot of the git state of a source directory (see the
+/// module docs). Every field degrades to its empty value when the
+/// corresponding query fails.
+#[derive(Debug, Clone, Default, PartialEq, Eq)]
+pub struct GitOrigin {
+    /// Forge of the `origin` remote, when it is one of the recognized ones.
+    pub forge: Option<Forge>,
+    /// Tag exactly at HEAD, when there is one (name as written, e.g. `v1.2.3`).
+    pub head_tag: Option<String>,
+    /// Every tag of the repository, sorted lexically.
+    pub tags: Vec<String>,
+    /// Last tag reachable from HEAD (used by [`GitOrigin::git_version`]).
+    pub last_tag: Option<String>,
+    /// HEAD commit date as `%Y%m%d`.
+    pub head_date: Option<String>,
+    /// HEAD commit short hash.
+    pub head_hash: Option<String>,
+    /// Whether the worktree carries uncommitted changes (`git status
+    /// --porcelain` non-empty).
+    pub dirty: bool,
+}
+
+impl GitOrigin {
+    /// Detect the git origin state of `dir`. Returns `None` when `dir` is
+    /// not inside a git work tree (or git cannot be run); every other
+    /// failure is fail-soft (the field stays empty).
+    pub fn detect(dir: &Path) -> Option<GitOrigin> {
+        // Inside a work tree? (fails outside git; prints "false" in a bare
+        // repository).
+        if git(dir, &["rev-parse", "--is-inside-work-tree"]).as_deref() != Some("true") {
+            return None;
+        }
+
+        let mut origin = GitOrigin {
+            head_tag: git(dir, &["describe", "--tags", "--exact-match", "HEAD"]),
+            tags: git(dir, &["tag", "--list"])
+                .map(|out| {
+                    out.lines()
+                        .map(str::to_string)
+                        .filter(|line| !line.is_empty())
+                        .collect()
+                })
+                .unwrap_or_default(),
+            last_tag: git(dir, &["describe", "--tags", "--abbrev=0"]),
+            head_date: git(dir, &["log", "-1", "--date=format:%Y%m%d", "--format=%cd"]),
+            head_hash: git(dir, &["rev-parse", "--short", "HEAD"]),
+            dirty: git(dir, &["status", "--porcelain"]).is_some_and(|out| !out.trim().is_empty()),
+            forge: None,
+        };
+
+        if let Some(url) = git(dir, &["remote", "get-url", "origin"])
+            .or_else(|| git(dir, &["config", "--get", "remote.origin.url"]))
+        {
+            origin.forge = Forge::parse(&url);
+        }
+
+        Some(origin)
+    }
+
+    /// Upstream version named by the tag at HEAD: the tag with a leading
+    /// `v`/`V` (before a digit) stripped, and only when the result is a
+    /// plausible Debian upstream version (no `-`, which is the revision
+    /// separator).
+    pub fn head_tag_version(&self) -> Option<String> {
+        sanitized_tag_version(self.head_tag.as_deref()?)
+    }
+
+    /// Version suggestion for a HEAD between releases:
+    /// `<lasttag>+git<YYYYMMDD>.<shorthash>` (e.g. `1.2.3+git20260916.4b8a2f1`),
+    /// or `None` without a reachable tag, tag-strippable version, date or hash.
+    pub fn git_version(&self) -> Option<String> {
+        let base = sanitized_tag_version(self.last_tag.as_deref()?)?;
+        let date = self.head_date.as_deref()?;
+        let hash = self.head_hash.as_deref()?;
+        Some(format!("{base}+git{date}.{hash}"))
+    }
+
+    /// The repository tag naming `version` (a leading `v`/`V` on the tag is
+    /// ignored), whatever the state of HEAD.
+    pub fn tag_for_version(&self, version: &str) -> Option<&str> {
+        self.tags
+            .iter()
+            .map(String::as_str)
+            .find(|tag| sanitized_tag_version(tag).as_deref() == Some(version))
+    }
+}
+
+/// Strip a leading `v`/`V` (before a digit) off a tag name and keep only
+/// results usable as a Debian upstream version: no `-` (which is the revision
+/// separator) and no leading non-digit.
+fn sanitized_tag_version(tag: &str) -> Option<String> {
+    let stripped = tag
+        .strip_prefix(['v', 'V'])
+        .filter(|rest| rest.starts_with(|c: char| c.is_ascii_digit()))
+        .unwrap_or(tag);
+    if stripped.starts_with(|c: char| c.is_ascii_digit()) && !stripped.contains('-') {
+        Some(stripped.to_string())
+    } else {
+        None
+    }
+}
+
+/// Check out `tag` in the repository at `dir`, refusing a dirty worktree:
+/// pkh never carries uncommitted changes across a checkout. Detached HEAD
+/// is the expected outcome when packaging a release tag.
+pub fn checkout_tag(dir: &Path, tag: &str) -> Result<(), Box<dyn std::error::Error>> {
+    if let Some(status) = git(dir, &["status", "--porcelain"])
+        && !status.trim().is_empty()
+    {
+        return Err(format!(
+            "The working tree of '{}' has uncommitted changes: commit or \
+             stash them before checking out '{tag}' (pkh does not carry \
+             changes across a checkout)",
+            dir.display()
+        )
+        .into());
+    }
+    let output = Command::new("git")
+        .args(["checkout", tag])
+        .current_dir(dir)
+        .output()
+        .map_err(|e| format!("failed to run 'git checkout': {e}"))?;
+    if !output.status.success() {
+        return Err(format!(
+            "'git checkout {tag}' failed: {}",
+            String::from_utf8_lossy(&output.stderr).trim()
+        )
+        .into());
+    }
+    Ok(())
+}
+
+/// Run `git` with `args` in `dir`, returning its trimmed stdout when it
+/// exits successfully (empty output stays an empty string).
+fn git(dir: &Path, args: &[&str]) -> Option<String> {
+    let output = Command::new("git")
+        .args(args)
+        .current_dir(dir)
+        .output()
+        .ok()?;
+    output
+        .status
+        .success()
+        .then(|| String::from_utf8_lossy(&output.stdout).trim().to_string())
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use tempfile::tempdir;
+
+    /// Whether the host has a usable git CLI (every fixture below needs it).
+    fn have_git() -> bool {
+        Command::new("git")
+            .arg("--version")
+            .output()
+            .is_ok_and(|output| output.status.success())
+    }
+
+    /// Run git in `dir`, failing the test on error, with a deterministic
+    /// identity and no signing so host git config cannot break the fixture.
+    fn git(dir: &Path, args: &[&str]) {
+        let status = Command::new("git")
+            .args([
+                "-c",
+                "user.name=Pkh Origin",
+                "-c",
+                "user.email=pkhorigin@example.invalid",
+                "-c",
+                "commit.gpgsign=false",
+            ])
+            .args(args)
+            .current_dir(dir)
+            .env("GIT_AUTHOR_DATE", "2026-09-15T12:00:00Z")
+            .env("GIT_COMMITTER_DATE", "2026-09-15T12:00:00Z")
+            .status()
+            .expect("git should be runnable");
+        assert!(status.success(), "git {args:?} failed");
+    }
+
+    /// A repository with a single commit on 2026-09-15, returning its
+    /// short HEAD hash.
+    fn init_repo(dir: &Path) -> String {
+        git(dir, &["init", "-q"]);
+        std::fs::write(dir.join("file.txt"), "one\n").unwrap();
+        git(dir, &["add", "file.txt"]);
+        git(dir, &["commit", "-q", "-m", "first"]);
+        git_out(dir, &["rev-parse", "--short", "HEAD"])
+    }
+
+    #[test]
+    fn forge_parses_remote_url_shapes() {
+        assert_eq!(
+            Forge::parse("https://github.com/foo/bar.git"),
+            Some(Forge::GitHub {
+                owner: "foo".into(),
+                repo: "bar".into()
+            })
+        );
+        assert_eq!(
+            Forge::parse("git@github.com:foo/bar.git"),
+            Some(Forge::GitHub {
+                owner: "foo".into(),
+                repo: "bar".into()
+            })
+        );
+        assert_eq!(
+            Forge::parse("git://github.com/foo/bar"),
+            Some(Forge::GitHub {
+                owner: "foo".into(),
+                repo: "bar".into()
+            })
+        );
+        assert_eq!(
+            Forge::parse("https://gitlab.com/foo/bar/-/tree/main"),
+            Some(Forge::GitLab {
+                owner: "foo".into(),
+                repo: "bar".into()
+            })
+        );
+        assert_eq!(
+            Forge::parse("ssh://git@gitlab.com/foo/bar.git"),
+            Some(Forge::GitLab {
+                owner: "foo".into(),
+                repo: "bar".into()
+            })
+        );
+        // Self-hosted GitLab instances and other hosts are not recognized.
+        assert_eq!(Forge::parse("https://gitlab.example.com/foo/bar.git"), None);
+        assert_eq!(Forge::parse("https://bitbucket.org/foo/bar.git"), None);
+        // Garbage.
+        assert_eq!(Forge::parse("not a url"), None);
+        assert_eq!(Forge::parse("https://github.com/onlyowner"), None);
+    }
+
+    #[test]
+    fn forge_release_tarball_urls() {
+        let gh = Forge::GitHub {
+            owner: "foo".into(),
+            repo: "bar".into(),
+        };
+        assert_eq!(
+            gh.release_tarball_urls("v1.2.3"),
+            vec![
+                "https://codeload.github.com/foo/bar/tar.gz/refs/tags/v1.2.3".to_string(),
+                "https://github.com/foo/bar/archive/refs/tags/v1.2.3.tar.gz".to_string(),
+            ]
+        );
+        let gl = Forge::GitLab {
+            owner: "foo".into(),
+            repo: "bar".into(),
+        };
+        assert_eq!(
+            gl.release_tarball_urls("v1.2.3"),
+            vec!["https://gitlab.com/foo/bar/-/archive/v1.2.3/bar-v1.2.3.tar.gz".to_string()]
+        );
+    }
+
+    #[test]
+    fn sanitized_tag_versions() {
+        assert_eq!(sanitized_tag_version("v1.2.3"), Some("1.2.3".to_string()));
+        assert_eq!(sanitized_tag_version("V2.0"), Some("2.0".to_string()));
+        assert_eq!(sanitized_tag_version("1.2.3"), Some("1.2.3".to_string()));
+        // `v` followed by a non-digit is part of the name, not a marker.
+        assert_eq!(sanitized_tag_version("version-1"), None);
+        // `-` would collide with the Debian revision separator.
+        assert_eq!(sanitized_tag_version("v1.2.3-beta"), None);
+    }
+
+    #[test]
+    fn detect_outside_a_repository_is_none() {
+        if !have_git() {
+            return;
+        }
+        let dir = tempdir().unwrap();
+        assert_eq!(GitOrigin::detect(dir.path()), None);
+        // A bare repository is not a work tree either.
+        let bare = tempdir().unwrap();
+        git(bare.path(), &["init", "-q", "--bare"]);
+        assert_eq!(GitOrigin::detect(bare.path()), None);
+    }
+
+    #[test]
+    fn detect_plain_repo_without_tags_or_remote() {
+        if !have_git() {
+            return;
+        }
+        let dir = tempdir().unwrap();
+        let hash = init_repo(dir.path());
+
+        let origin = GitOrigin::detect(dir.path()).expect("detected");
+        assert_eq!(origin.forge, None);
+        assert_eq!(origin.head_tag, None);
+        assert!(origin.tags.is_empty());
+        assert_eq!(origin.last_tag, None);
+        assert_eq!(origin.head_hash.as_deref(), Some(hash.as_str()));
+        assert_eq!(origin.head_date.as_deref(), Some("20260915"));
+        assert!(!origin.dirty);
+        // No tags: no version can be derived.
+        assert_eq!(origin.head_tag_version(), None);
+        assert_eq!(origin.git_version(), None);
+    }
+
+    #[test]
+    fn detect_head_exactly_on_a_tag() {
+        if !have_git() {
+            return;
+        }
+        let dir = tempdir().unwrap();
+        init_repo(dir.path());
+        git(dir.path(), &["tag", "v1.2.3"]);
+
+        let origin = GitOrigin::detect(dir.path()).expect("detected");
+        assert_eq!(origin.head_tag.as_deref(), Some("v1.2.3"));
+        assert_eq!(origin.last_tag.as_deref(), Some("v1.2.3"));
+        assert_eq!(origin.head_tag_version().as_deref(), Some("1.2.3"));
+        // The query is the stripped version; the raw tag name is not one.
+        assert_eq!(origin.tag_for_version("1.2.3"), Some("v1.2.3"));
+        assert_eq!(origin.tag_for_version("v1.2.3"), None);
+        assert_eq!(origin.tag_for_version("9.9.9"), None);
+    }
+
+    #[test]
+    fn detect_between_releases_derives_git_version() {
+        if !have_git() {
+            return;
+        }
+        let dir = tempdir().unwrap();
+        init_repo(dir.path());
+        git(dir.path(), &["tag", "v1.2.3"]);
+        std::fs::write(dir.path().join("file.txt"), "two\n").unwrap();
+        git(dir.path(), &["add", "file.txt"]);
+        git(dir.path(), &["commit", "-q", "-m", "second"]);
+        let hash = git_out(dir.path(), &["rev-parse", "--short", "HEAD"]);
+
+        let origin = GitOrigin::detect(dir.path()).expect("detected");
+        assert_eq!(origin.head_tag, None);
+        assert_eq!(origin.last_tag.as_deref(), Some("v1.2.3"));
+        assert_eq!(origin.tag_for_version("1.2.3"), Some("v1.2.3"));
+        assert_eq!(
+            origin.git_version().as_deref(),
+            Some(format!("1.2.3+git20260915.{hash}").as_str())
+        );
+    }
+
+    #[test]
+    fn detect_tracks_the_origin_remote() {
+        if !have_git() {
+            return;
+        }
+        let dir = tempdir().unwrap();
+        init_repo(dir.path());
+        // A local path remote: configuring it never touches the network.
+        git(
+            dir.path(),
+            &["remote", "add", "origin", "https://github.com/foo/bar.git"],
+        );
+
+        let origin = GitOrigin::detect(dir.path()).expect("detected");
+        assert_eq!(
+            origin.forge,
+            Some(Forge::GitHub {
+                owner: "foo".into(),
+                repo: "bar".into()
+            })
+        );
+    }
+
+    #[test]
+    fn detect_reports_a_dirty_worktree() {
+        if !have_git() {
+            return;
+        }
+        let dir = tempdir().unwrap();
+        init_repo(dir.path());
+        std::fs::write(dir.path().join("file.txt"), "uncommitted\n").unwrap();
+
+        let origin = GitOrigin::detect(dir.path()).expect("detected");
+        assert!(origin.dirty);
+    }
+
+    #[test]
+    fn git_version_skips_unusable_tags() {
+        // A tag carrying `-` cannot become an upstream version: the scheme
+        // degrades to None instead of proposing an invalid version.
+        let origin = GitOrigin {
+            last_tag: Some("1.2.3-beta".into()),
+            head_date: Some("20260915".into()),
+            head_hash: Some("abc1234".into()),
+            ..Default::default()
+        };
+        assert_eq!(origin.git_version(), None);
+        // Date or hash missing: nothing to propose either.
+        assert_eq!(
+            GitOrigin {
+                last_tag: Some("v2.0".into()),
+                ..Default::default()
+            }
+            .git_version(),
+            None
+        );
+    }
+
+    /// `git` output trimmed (for the hash assertions above).
+    fn git_out(dir: &Path, args: &[&str]) -> String {
+        let output = Command::new("git")
+            .args(args)
+            .current_dir(dir)
+            .output()
+            .unwrap();
+        assert!(output.status.success(), "git {args:?} failed");
+        String::from_utf8_lossy(&output.stdout).trim().to_string()
+    }
+
+    /// The tag lookup ignores a `v` prefix in either direction.
+    #[test]
+    fn tag_for_version_matches_both_spellings() {
+        let origin = GitOrigin {
+            tags: vec!["1.0".to_string(), "v2.0".to_string()],
+            ..Default::default()
+        };
+        assert_eq!(origin.tag_for_version("1.0"), Some("1.0"));
+        assert_eq!(origin.tag_for_version("2.0"), Some("v2.0"));
+        assert_eq!(origin.tag_for_version("3.0"), None);
+    }
+}

src/new/questions.rs

@@ -23,7 +23,8 @@ use std::path::PathBuf;
 use indicatif::MultiProgress;
 
 use crate::new::detect::{self, Detection};
-use crate::new::options::{self, NewCli, NewOptions, SourceDir, TemplateId};
+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;
 
@@ -60,15 +61,17 @@ const SOURCE_LABEL: &str = "Where is the source code? ";
 const LICENSE_LABEL: &str = "License: ";
 const DIST_LABEL: &str = "Target distribution: ";
 const SERIES_LABEL: &str = "Target series: ";
+const ORIG_LABEL: &str = "Where should the orig tarball come from? ";
 
 /// All select labels, so the separator test can check them in one place.
 #[cfg(test)]
-const SELECT_LABELS: [&str; 5] = [
+const SELECT_LABELS: [&str; 6] = [
     LANGUAGE_LABEL,
     SOURCE_LABEL,
     LICENSE_LABEL,
     DIST_LABEL,
     SERIES_LABEL,
+    ORIG_LABEL,
 ];
 
 /// Run the `pkh new` flow: the wizard on an interactive terminal, plain
@@ -88,8 +91,10 @@ fn is_interactive() -> bool {
 }
 
 /// The wizard question flow (spec "Proposed UX"), in order:
-/// package name, language/build system, source location, upstream version,
+/// package name, language/build system, source location, upstream version
-/// Debian revision, one-line description, homepage, license, command name,
+/// (with the checkout-tag offer when the version names an existing tag),
+/// the orig-tarball origin (quilt + existing project only), Debian
+/// revision, one-line description, homepage, license, command name,
 /// maintainer, target distribution, target series, metapackage Depends
 /// (`empty` template only), git init — then the summary screen and the
 /// final `Generate?` confirmation. Every question with an explicit flag
@@ -205,17 +210,101 @@ async fn run_wizard(mut cli: NewCli) -> Result<NewOptions, Box<dyn Error>> {
         cli.source = Some(cwd.clone());
     }
 
-    // 4. Upstream version.
+    // The source format this run will produce: explicit flags win, then the
+    // mode (skeleton → native, existing project → quilt). The wizard
+    // surfaces it in the summary; `options::resolve` re-derives it the same
+    // way for the non-interactive path.
+    let source_format = match (cli.native, cli.quilt) {
+        (true, true) => {
+            return Err("--native and --quilt are mutually exclusive".into());
+        }
+        (true, false) => SourceFormat::Native,
+        (false, true) => SourceFormat::Quilt,
+        (false, false) => {
+            if cli.source.is_none() {
+                SourceFormat::Native
+            } else {
+                SourceFormat::Quilt
+            }
+        }
+    };
+
+    // Git origin of the packaged directory: drives the version default, the
+    // checkout-tag offer and the orig-tarball question. Purely local.
+    let packaged_dir = cli.source.clone();
+    let mut origin = packaged_dir.as_deref().and_then(GitOrigin::detect);
+
+    // 4. Upstream version: probed project version, then the tag HEAD sits
+    //    on, then `<lasttag>+git<YYYYMMDD>.<hash>`, then 0.1.0.
     if cli.upstream_version.is_none() {
         let default = probe
             .as_ref()
             .and_then(|p| p.version.clone())
+            .or_else(|| origin.as_ref().and_then(GitOrigin::head_tag_version))
+            .or_else(|| origin.as_ref().and_then(GitOrigin::git_version))
             .unwrap_or_else(|| "0.1.0".to_string());
         let revision = cli.revision.unwrap_or(1);
         let answer = ask_text("Upstream version", &default, move |version: &str| {
             options::validate_upstream_version(version, revision)
         })?;
-        cli.upstream_version = Some(answer);
+        cli.upstream_version = Some(answer.clone());
+
+        // The typed version names an existing tag HEAD is not on: offer to
+        // check the release out (the packaging then matches the version).
+        if let Some(origin_state) = &origin
+            && let Some(tag) = origin_state.tag_for_version(&answer)
+            && Some(tag) != origin_state.head_tag.as_deref()
+        {
+            let question = format!(
+                "Version {answer} matches tag {tag}, but HEAD is not that \
+                 tag. Check out {tag} now?"
+            );
+            if prompt::confirm(&question, false)? {
+                let dir = packaged_dir.as_deref().expect("origin implies a directory");
+                crate::new::origin::checkout_tag(dir, tag)?;
+                log::info!(
+                    "Checked out {tag} (detached HEAD — expected when \
+                     packaging a release)"
+                );
+                // HEAD moved: the release/git-archive choices below must
+                // reflect the checkout.
+                origin = GitOrigin::detect(dir);
+            }
+            // Declined (or non-TTY): keep the current tree and the typed
+            // version.
+        }
+    }
+
+    // 4b. Orig-tarball origin (quilt + existing project only): one select
+    //     question, options pre-ordered by what the detection found. The
+    //     release download is explicit network consent; a skeleton quilt
+    //     tree has no upstream history and is only ever snapshotted.
+    if source_format == SourceFormat::Quilt && packaged_dir.is_some() {
+        let choices = orig_origin_choices(origin.as_ref());
+        let labels: Vec<String> = choices.iter().map(|(label, _)| label.clone()).collect();
+        let head_tagged = origin
+            .as_ref()
+            .and_then(|o| o.head_tag.as_deref())
+            .is_some();
+        let default = if head_tagged {
+            labels[0].clone()
+        } else {
+            "Snapshot this working tree".to_string()
+        };
+        let answer = select_from(ORIG_LABEL, &labels, &default, |answer| {
+            labels.contains(&answer.to_string())
+        })?;
+        let chosen = choices
+            .iter()
+            .find(|(label, _)| label == &answer)
+            .map(|(_, value)| *value)
+            .expect("answer comes from the choice list");
+        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))?;
+            cli.orig_path = Some(path);
+        }
     }
 
     // 5. Debian revision.
@@ -706,6 +795,37 @@ fn validate_revision_answer(answer: &str) -> Result<(), String> {
     }
 }
 
+/// The choices of the orig-tarball-origin question for a quilt packaging of
+/// an existing directory: `(menu label, --orig-from value)` pairs,
+/// pre-ordered by what the git origin detection found — the release
+/// download and `git archive` only exist when HEAD sits exactly on a tag,
+/// the release download additionally needs a recognized forge. The working
+/// tree snapshot is always available (and is the implicit default when HEAD
+/// is not on a tag).
+fn orig_origin_choices(origin: Option<&GitOrigin>) -> Vec<(String, &'static str)> {
+    let mut choices: Vec<(String, &'static str)> = Vec::new();
+    if let Some(origin) = origin
+        && let Some(tag) = &origin.head_tag
+    {
+        if let Some(forge) = &origin.forge {
+            choices.push((
+                format!(
+                    "Download the upstream release tarball from {} ({tag})",
+                    forge.host()
+                ),
+                "release",
+            ));
+        }
+        choices.push((
+            format!("Create it from the git tag ({tag}, git archive)"),
+            "git",
+        ));
+    }
+    choices.push(("Use a tarball I provide".to_string(), "path"));
+    choices.push(("Snapshot this working tree".to_string(), "snapshot"));
+    choices
+}
+
 /// A `debian/watch` template for GitHub/GitLab-hosted projects; `None` when
 /// the homepage is not one of those hosts (the wizard skips the question).
 pub fn watch_template(homepage: Option<&str>) -> Option<String> {
@@ -784,6 +904,13 @@ pub fn summary_text(opts: &NewOptions, toolchain_pin: Option<&str>) -> String {
             lines.push(format!("  debian/rules      {}", template.rules_dh_line()));
         }
     }
+    lines.push(format!(
+        "  debian/source/format {}",
+        opts.source_format.deb_string()
+    ));
+    if let Some(orig) = &opts.orig {
+        lines.push(format!("  orig tarball        {}", orig.label()));
+    }
     let distribution = if opts.release {
         opts.series.as_str()
     } else {
@@ -850,7 +977,8 @@ mod tests {
             series: "resolute".into(),
             release: false,
             depends: Vec::new(),
-            native: false,
+            source_format: options::SourceFormat::Native,
+            orig: None,
             git: true,
             autopkgtest: false,
             pkg_config: false,
@@ -945,6 +1073,92 @@ mod tests {
         assert!(watch_template(None).is_none());
     }
 
+    /// The orig-origin choices are pre-ordered by what the detection found:
+    /// release download only with a forge, git archive only on a tag,
+    /// tarball/snapshot always; snapshot last (the off-tag default).
+    #[test]
+    fn orig_origin_choices_preorder_by_detection() {
+        use crate::new::origin::Forge;
+        let tagged_forge = GitOrigin {
+            forge: Some(Forge::GitHub {
+                owner: "foo".into(),
+                repo: "bar".into(),
+            }),
+            head_tag: Some("v1.4.0".into()),
+            ..Default::default()
+        };
+        let choices = orig_origin_choices(Some(&tagged_forge));
+        assert_eq!(choices.len(), 4);
+        assert_eq!(choices[0].1, "release");
+        assert!(choices[0].0.contains("github.com"));
+        assert!(choices[0].0.contains("v1.4.0"));
+        assert_eq!(choices[1].1, "git");
+        assert!(choices[1].0.contains("git archive"));
+        assert_eq!(choices[2].1, "path");
+        assert_eq!(choices[3].1, "snapshot");
+
+        // Tag without a recognized forge: no download option.
+        let tagged = GitOrigin {
+            head_tag: Some("1.0.0".into()),
+            ..Default::default()
+        };
+        let choices = orig_origin_choices(Some(&tagged));
+        assert_eq!(choices.len(), 3);
+        assert_eq!(choices[0].1, "git");
+        assert_eq!(choices[1].1, "path");
+        assert_eq!(choices[2].1, "snapshot");
+
+        // Off a tag (or not even a repo): tarball + snapshot only.
+        let off_tag = GitOrigin {
+            last_tag: Some("v1.0.0".into()),
+            ..Default::default()
+        };
+        let choices = orig_origin_choices(Some(&off_tag));
+        assert_eq!(choices.len(), 2);
+        assert_eq!(choices[0].1, "path");
+        assert_eq!(choices[1].1, "snapshot");
+        assert_eq!(orig_origin_choices(None).len(), 2);
+    }
+
+    /// The summary surfaces the derived source format and, for quilt, the
+    /// planned orig origin.
+    #[test]
+    fn summary_screen_shows_format_and_orig_origin() {
+        // Native skeleton: the format row, no orig row.
+        let text = summary_text(&opts(Tid::Shell), None);
+        assert!(text.contains("debian/source/format 3.0 (native)"), "{text}");
+        assert!(!text.contains("orig tarball"), "{text}");
+
+        // Quilt over an existing project: both rows.
+        let mut quilt = opts(Tid::Shell);
+        quilt.source_dir = options::SourceDir::Here;
+        quilt.source_format = options::SourceFormat::Quilt;
+        quilt.orig = Some(options::OrigOrigin::GitArchive {
+            tag: "v1.4.0".to_string(),
+        });
+        let text = summary_text(&quilt, None);
+        assert!(text.contains("debian/source/format 3.0 (quilt)"), "{text}");
+        assert!(
+            text.contains("orig tarball        git archive (v1.4.0)"),
+            "{text}"
+        );
+
+        // The release-download label of the origin matrix.
+        let mut release = quilt.clone();
+        release.orig = Some(options::OrigOrigin::Release {
+            tag: "v0.14.0".to_string(),
+            forge: crate::new::origin::Forge::GitLab {
+                owner: "foo".into(),
+                repo: "bar".into(),
+            },
+        });
+        let text = summary_text(&release, None);
+        assert!(
+            text.contains("orig tarball        release download (v0.14.0)"),
+            "{text}"
+        );
+    }
+
     #[test]
     fn summary_screen_skeleton() {
         let text = summary_text(&opts(Tid::Makefile), None);

src/new/templates/autotools.rs

@@ -129,7 +129,8 @@ mod tests {
             series: "resolute".into(),
             release: false,
             depends: Vec::new(),
-            native: false,
+            source_format: crate::new::options::SourceFormat::Quilt,
+            orig: Some(crate::new::options::OrigOrigin::Snapshot),
             git: true,
             autopkgtest: false,
             pkg_config: false,

src/new/templates/cmake.rs

@@ -104,7 +104,8 @@ mod tests {
             series: "resolute".into(),
             release: false,
             depends: Vec::new(),
-            native: false,
+            source_format: crate::new::options::SourceFormat::Quilt,
+            orig: Some(crate::new::options::OrigOrigin::Snapshot),
             git: true,
             autopkgtest: false,
             pkg_config: false,

src/new/templates/empty.rs

@@ -60,7 +60,8 @@ mod tests {
             series: "sid".into(),
             release: false,
             depends,
-            native: false,
+            source_format: crate::new::options::SourceFormat::Quilt,
+            orig: Some(crate::new::options::OrigOrigin::Snapshot),
             git: true,
             autopkgtest: false,
             pkg_config: false,

src/new/templates/go.rs

@@ -134,7 +134,8 @@ mod tests {
             series: "resolute".into(),
             release: false,
             depends: Vec::new(),
-            native: false,
+            source_format: crate::new::options::SourceFormat::Quilt,
+            orig: Some(crate::new::options::OrigOrigin::Snapshot),
             git: true,
             autopkgtest: false,
             pkg_config: false,

src/new/templates/makefile.rs

@@ -139,7 +139,8 @@ mod tests {
             series: "resolute".into(),
             release: false,
             depends: Vec::new(),
-            native: false,
+            source_format: crate::new::options::SourceFormat::Quilt,
+            orig: Some(crate::new::options::OrigOrigin::Snapshot),
             git: true,
             autopkgtest: false,
             pkg_config: false,

src/new/templates/meson.rs

@@ -118,7 +118,8 @@ mod tests {
             series: "resolute".into(),
             release: false,
             depends: Vec::new(),
-            native: false,
+            source_format: crate::new::options::SourceFormat::Quilt,
+            orig: Some(crate::new::options::OrigOrigin::Snapshot),
             git: true,
             autopkgtest: false,
             pkg_config: false,

src/new/templates/mod.rs

@@ -54,12 +54,16 @@ impl OutputFile {
 /// What the template post-write hook did to the freshly written tree,
 /// threaded through [`super::scaffold`] so the flow can react (e.g. word
 /// the post-scaffold verification offer differently when vendoring failed).
-#[derive(Debug, Clone, Copy, Default)]
+#[derive(Debug, Clone, Default)]
 pub struct ScaffoldOutcome {
     /// The vendoring step did not complete (host `cargo` missing, `cargo
     /// vendor` failed, or the offline config could not be written): the
     /// package will not build until the dependencies are vendored manually.
     pub vendoring_failed: bool,
+    /// How the orig tarball was actually created (quilt only; `None` with
+    /// the native format, which has no orig tarball). Filled in by the
+    /// scaffold flow, not by the template hook.
+    pub orig_origin: Option<String>,
 }
 
 /// Metadata extracted from an existing project by [`Template::probe`], used
@@ -266,7 +270,8 @@ mod tests {
             series: "resolute".into(),
             release: false,
             depends: Vec::new(),
-            native: false,
+            source_format: crate::new::options::SourceFormat::Quilt,
+            orig: None,
             git: false,
             autopkgtest: false,
             pkg_config: false,
@@ -335,7 +340,8 @@ mod tests {
             series: "resolute".into(),
             release: false,
             depends: Vec::new(),
-            native: false,
+            source_format: crate::new::options::SourceFormat::Quilt,
+            orig: None,
             git: false,
             autopkgtest: false,
             pkg_config: false,

src/new/templates/python.rs

@@ -361,7 +361,8 @@ mod tests {
             series: "resolute".into(),
             release: false,
             depends: Vec::new(),
-            native: false,
+            source_format: crate::new::options::SourceFormat::Quilt,
+            orig: Some(crate::new::options::OrigOrigin::Snapshot),
             git: true,
             autopkgtest: false,
             pkg_config: false,

src/new/templates/rust.rs

@@ -161,7 +161,10 @@ impl Template for Rust {
         // `--locked` now that the outcome is known, so the final rules use
         // it exactly when the lockfile exists.
         patch_rules_locked(tree)?;
-        Ok(ScaffoldOutcome { vendoring_failed })
+        Ok(ScaffoldOutcome {
+            vendoring_failed,
+            orig_origin: None,
+        })
     }
 }
 
@@ -169,7 +172,10 @@ impl Template for Rust {
 /// offline source replacement. Returns whether the step completed; failures
 /// warn loudly and leave the tree for manual vendoring. I/O errors on the
 /// freshly written tree are the exception: they fail the scaffold.
-fn vendor_dependencies(tree: &Path) -> Result<bool, Box<dyn std::error::Error>> {
+///
+/// `pub(crate)` because the `pkh build` re-vendor retry (see
+/// [`crate::build`]'s `VendorDriftError` hook) reruns exactly this step.
+pub(crate) fn vendor_dependencies(tree: &Path) -> Result<bool, Box<dyn std::error::Error>> {
     let Some(cargo) = find_on_path("cargo") else {
         log::warn!(
             "cargo was not found on PATH: the Rust package will NOT build \
@@ -489,7 +495,8 @@ mod tests {
             series: "resolute".into(),
             release: false,
             depends: Vec::new(),
-            native: false,
+            source_format: crate::new::options::SourceFormat::Quilt,
+            orig: Some(crate::new::options::OrigOrigin::Snapshot),
             git: true,
             autopkgtest: false,
             pkg_config: false,

src/new/templates/shell.rs

@@ -79,7 +79,8 @@ mod tests {
             series: "resolute".into(),
             release: false,
             depends: Vec::new(),
-            native: false,
+            source_format: crate::new::options::SourceFormat::Quilt,
+            orig: Some(crate::new::options::OrigOrigin::Snapshot),
             git: true,
             autopkgtest: false,
             pkg_config: false,

src/new/verify.rs

@@ -71,9 +71,9 @@ pub fn verify(tree: &Path) -> Result<(), Box<dyn std::error::Error>> {
 
     // Quilt packages need their orig tarball next to the tree.
     if format == super::debian::SOURCE_FORMAT_QUILT {
-        let uversion = parsed_version.upstream;
+        let uversion = super::orig::component_upstream_version(&parsed_version);
         let tarball =
-            super::debian::orig_tarball_path(tree, &source, &uversion).ok_or_else(|| {
+            super::debian::orig_tarball_path(tree, &source, uversion).ok_or_else(|| {
                 format!(
                     "cannot determine the parent directory of '{}'",
                     tree.display()
@@ -87,6 +87,29 @@ pub fn verify(tree: &Path) -> Result<(), Box<dyn std::error::Error>> {
             )
             .into());
         }
+
+        // Vendored rust: the orig-vendor component is required exactly when
+        // the main orig exists and the tree carries a generated, non-empty
+        // `vendor/` directory (native packages have no tarballs at all, and
+        // trees without vendoring must not demand the component either).
+        if super::orig::has_vendored_dir(tree) {
+            let component = super::orig::vendor_component_path(tree, &source, uversion)
+                .ok_or_else(|| {
+                    format!(
+                        "cannot determine the parent directory of '{}'",
+                        tree.display()
+                    )
+                })?;
+            if !component.exists() {
+                return Err(format!(
+                    "Quilt package with vendored dependencies but without \
+                     the orig-vendor component: '{}' is missing. Re-run \
+                     pkh new, or recreate it after re-vendoring.",
+                    component.display()
+                )
+                .into());
+            }
+        }
     }
 
     Ok(())
@@ -95,7 +118,9 @@ pub fn verify(tree: &Path) -> Result<(), Box<dyn std::error::Error>> {
 #[cfg(test)]
 mod tests {
     use super::*;
-    use crate::new::options::{License, NewOptions, SourceDir, TemplateId};
+    use crate::new::options::{
+        License, NewOptions, OrigOrigin, SourceDir, SourceFormat, TemplateId,
+    };
     use tempfile::tempdir;
 
     fn opts() -> NewOptions {
@@ -115,7 +140,8 @@ mod tests {
             series: "sid".into(),
             release: false,
             depends: Vec::new(),
-            native: false,
+            source_format: SourceFormat::Quilt,
+            orig: Some(OrigOrigin::Snapshot),
             git: false,
             autopkgtest: false,
             pkg_config: false,
@@ -134,7 +160,7 @@ mod tests {
         files.extend(template.skeleton(opts));
         files.extend(template.debian(opts));
         crate::new::debian::write_files(&tree, &files).unwrap();
-        if !opts.native {
+        if opts.source_format == SourceFormat::Quilt {
             crate::new::debian::create_orig_tarball(&tree, &opts.name, &opts.upstream_version)
                 .unwrap();
         }
@@ -154,13 +180,54 @@ mod tests {
         let tree = scaffold_tree(
             dir.path(),
             &NewOptions {
-                native: true,
+                source_format: SourceFormat::Native,
+                orig: None,
                 ..opts()
             },
         );
         verify(&tree).unwrap();
     }
 
+    /// The orig-vendor component is demanded exactly when the tree carries
+    /// a non-empty vendor/ next to a quilt orig — and not otherwise.
+    #[test]
+    fn verify_demands_the_vendor_component_only_when_vendored() {
+        // Quilt tree with a populated vendor/: verify fails until the
+        // component exists.
+        let dir = tempdir().unwrap();
+        let tree = scaffold_tree(dir.path(), &opts());
+        std::fs::create_dir_all(tree.join("vendor/serde/src")).unwrap();
+        std::fs::write(tree.join("vendor/serde/src/lib.rs"), "code").unwrap();
+        let err = verify(&tree).unwrap_err().to_string();
+        assert!(err.contains("orig-vendor"), "{err}");
+
+        // Creating the component fixes it. (The main orig was snapshotted
+        // before vendor/ existed, so it holds no vendor/ — dpkg-wise the
+        // component alone owns the vendored tree.)
+        crate::new::orig::create_vendor_component(&tree, "mytool", "0.1.0").unwrap();
+        verify(&tree).unwrap();
+
+        // A quilt tree without vendor/ must not demand the component.
+        let dir = tempdir().unwrap();
+        let tree = scaffold_tree(dir.path(), &opts());
+        verify(&tree).unwrap();
+        assert!(!dir.path().join("mytool_0.1.0.orig-vendor.tar.xz").exists());
+
+        // A native tree with vendor/ has no tarballs at all: no demand.
+        let dir = tempdir().unwrap();
+        let tree = scaffold_tree(
+            dir.path(),
+            &NewOptions {
+                source_format: SourceFormat::Native,
+                orig: None,
+                ..opts()
+            },
+        );
+        std::fs::create_dir_all(tree.join("vendor/serde/src")).unwrap();
+        std::fs::write(tree.join("vendor/serde/src/lib.rs"), "code").unwrap();
+        verify(&tree).unwrap();
+    }
+
     #[test]
     fn verify_names_the_broken_file() {
         // Each case needs its own tempdir: scaffolding refuses to overwrite