exp: cross #3

src/deb/local.rs

@@ -1,6 +1,7 @@
 /// Local binary package building
 /// Directly calling 'debian/rules' in current context
 use crate::context;
+use crate::deb::find_dsc_file;
 use std::collections::HashMap;
 use std::error::Error;
 use std::path::Path;
@@ -8,9 +9,8 @@ use std::path::Path;
 use crate::deb::cross;
 
 pub fn build(
-    _cwd: &Path,
     package: &str,
-    _version: &str,
+    version: &str,
     arch: &str,
     series: &str,
     build_root: &str,
@@ -19,6 +19,7 @@ pub fn build(
     // Environment
     let mut env = HashMap::<String, String>::new();
     env.insert("LANG".to_string(), "C".to_string());
+    env.insert("DEBIAN_FRONTEND".to_string(), "noninteractive".to_string());
 
     let ctx = context::current();
 
@@ -47,6 +48,7 @@ pub fn build(
         .arg("-y")
         .arg("install")
         .arg("build-essential")
+        .arg("dose-builddebcheck")
         .arg("fakeroot");
     if cross {
         cmd.arg(format!("crossbuild-essential-{arch}"));
@@ -66,7 +68,10 @@ pub fn build(
         cmd.arg(format!("--host-architecture={arch}"));
     }
     let status = cmd.arg("./").status()?;
+
+    // If build-dep fails, we try to explain the failure using dose-debcheck
     if !status.success() {
+        dose3_explain_dependencies(package, version, arch, build_root, cross)?;
         return Err("Could not install build-dependencies for the build".into());
     }
 
@@ -97,3 +102,60 @@ pub fn build(
 
     Ok(())
 }
+
+fn dose3_explain_dependencies(
+    package: &str,
+    version: &str,
+    arch: &str,
+    build_root: &str,
+    cross: bool,
+) -> Result<(), Box<dyn Error>> {
+    let ctx = context::current();
+
+    // Construct the list of Packages files
+    let mut bg_args = Vec::new();
+    let mut cmd = ctx.command("apt-get");
+    cmd.arg("indextargets")
+        .arg("--format")
+        .arg("$(FILENAME)")
+        .arg("Created-By: Packages");
+
+    let output = cmd.output()?;
+    if output.status.success() {
+        let filenames = String::from_utf8_lossy(&output.stdout);
+        for file in filenames.lines() {
+            let file = file.trim();
+            if !file.is_empty() {
+                bg_args.push(file.to_string());
+            }
+        }
+    }
+
+    // Transform the dsc file into a 'Source' stanza (replacing 'Source' with 'Package')
+    let dsc_path = find_dsc_file(build_root, package, version)?;
+    let mut dsc_content = ctx.read_file(&dsc_path)?;
+    dsc_content = dsc_content.replace("Source", "Package");
+    ctx.write_file(
+        Path::new(&format!("{build_root}/dsc-processed")),
+        &dsc_content,
+    )?;
+
+    // Call dose-builddebcheck
+    let local_arch = crate::get_current_arch();
+    let mut cmd = ctx.command("dose-builddebcheck");
+    cmd.arg("--verbose")
+        .arg("--failures")
+        .arg("--explain")
+        .arg("--summary")
+        .arg(format!("--deb-native-arch={}", local_arch));
+
+    if cross {
+        cmd.arg(format!("--deb-host-arch={}", arch))
+            .arg("--deb-profiles=cross")
+            .arg(format!("--deb-foreign-archs={}", arch));
+    }
+
+    cmd.args(bg_args).arg(format!("{build_root}/dsc-processed"));
+    cmd.status()?;
+    Ok(())
+}