build: first implementation

wrap around dpkg-buildpackage

src/build.rs

@@ -0,0 +1,26 @@
+use std::error::Error;
+use std::path::Path;
+use std::process::Command;
+
+pub fn build_source_package(cwd: Option<&Path>) -> Result<(), Box<dyn Error>> {
+    let cwd = cwd.unwrap_or_else(|| Path::new("."));
+
+    let status = Command::new("dpkg-buildpackage")
+        .current_dir(cwd)
+        .args(["-S", "-I", "-i", "-d"])
+        .status()?;
+
+    if !status.success() {
+        return Err(format!("dpkg-buildpackage failed with status: {}", status).into());
+    }
+
+    Ok(())
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    // We are not testing the build part, as for now this is just a wrapper
+    // around dpkg-buildpackage.
+}

src/lib.rs

@@ -1,3 +1,4 @@
+pub mod build;
 pub mod package_info;
 pub mod pull;
 

src/main.rs

@@ -49,6 +49,7 @@ fn main() {
                 .arg(arg!(--backport "This changelog is for a backport entry").required(false))
                 .arg(arg!(-v --version <version> "Target version").required(false)),
         )
+        .subcommand(Command::new("build").about("Build the source package"))
         .get_matches();
 
     match matches.subcommand() {
@@ -101,6 +102,13 @@ fn main() {
                 .args(["debian/changelog"])
                 .status();
         }
+        Some(("build", _sub_matches)) => {
+            let cwd = std::env::current_dir().unwrap();
+            if let Err(e) = pkh::build::build_source_package(Some(&cwd)) {
+                error!("{}", e);
+                std::process::exit(1);
+            }
+        }
         _ => unreachable!("Exhausted list of subcommands and subcommand_required prevents `None`"),
     }
 }