Support for vergen information when vendoring

build.rs

@@ -2,10 +2,14 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
     // Rebuild if i18n files change
     println!("cargo:rerun-if-changed=i18n");
 
-    vergen::EmitBuilder::builder()
-        .fail_on_error()
-        .git_commit_date()
-        .git_sha(true)
-        .emit()?;
+    // Emit version information (if not cached by just vendor)
+    let mut vergen = vergen::EmitBuilder::builder();
+    if std::env::var_os("VERGEN_GIT_COMMIT_DATE").is_none() {
+        vergen.git_commit_date();
+    }
+    if std::env::var_os("VERGEN_GIT_SHA").is_none() {
+        vergen.git_sha(true);
+    }
+    vergen.fail_on_error().emit()?;
     Ok(())
 }

debian/rules

@@ -8,11 +8,7 @@ export VENDOR ?= 1
 
 override_dh_auto_clean:
 	if ! ischroot && test "${VENDOR}" = "1"; then \
-		mkdir -p .cargo; \
-		cargo vendor | head -n -1 > .cargo/config; \
-		echo 'directory = "vendor"' >> .cargo/config; \
-		tar pcf vendor.tar vendor; \
-		rm -rf vendor; \
+		just vendor; \
 	fi
 
 override_dh_auto_build:

justfile

@@ -73,10 +73,14 @@ uninstall:
 vendor:
     mkdir -p .cargo
     cargo vendor --sync Cargo.toml \
-        | head -n -1 > .cargo/config
-    echo 'directory = "vendor"' >> .cargo/config
-    tar pcf vendor.tar vendor
-    rm -rf vendor
+        | head -n -1 > .cargo/config.toml
+    echo 'directory = "vendor"' >> .cargo/config.toml
+    echo >> .cargo/config.toml
+    echo '[env]' >> .cargo/config.toml
+    echo "VERGEN_GIT_COMMIT_DATE = \"$(git log -1 --pretty=format:'%cs' HEAD)\"" >> .cargo/config.toml
+    echo "VERGEN_GIT_SHA = \"$(git rev-parse --short HEAD)\"" >> .cargo/config.toml
+    tar pcf vendor.tar .cargo vendor
+    rm -rf .cargo vendor
 
 # Extracts vendored dependencies
 vendor-extract: