Fix vergen generation

build.rs

@@ -1,5 +1,17 @@
-use vergen::EmitBuilder;
+fn main() -> Result<(), Box<dyn std::error::Error>> {
+    // Rebuild if i18n files change
+    println!("cargo:rerun-if-changed=i18n");
 
-fn main() {
+    // Emit version information (if not cached by just vendor)
-    EmitBuilder::builder().git_sha(true).emit().unwrap();
+    let mut vergen = vergen::EmitBuilder::builder();
+    println!("cargo:rerun-if-env-changed=VERGEN_GIT_COMMIT_DATE");
+    if std::env::var_os("VERGEN_GIT_COMMIT_DATE").is_none() {
+        vergen.git_commit_date();
+    }
+    println!("cargo:rerun-if-env-changed=VERGEN_GIT_SHA");
+    if std::env::var_os("VERGEN_GIT_SHA").is_none() {
+        vergen.git_sha(false);
+    }
+    vergen.fail_on_error().emit()?;
+    Ok(())
 }

justfile

@@ -82,12 +82,23 @@ uninstall:
 
 # Vendor dependencies locally
 vendor:
+    #!/usr/bin/env bash
     mkdir -p .cargo
-    cargo vendor --sync Cargo.toml \
+    cargo vendor --sync Cargo.toml | head -n -1 > .cargo/config.toml
-        | head -n -1 > .cargo/config
+    echo 'directory = "vendor"' >> .cargo/config.toml
-    echo 'directory = "vendor"' >> .cargo/config
+    echo >> .cargo/config.toml
-    tar pcf vendor.tar vendor
+    echo '[env]' >> .cargo/config.toml
-    rm -rf vendor
+    if [ -n "${SOURCE_DATE_EPOCH}" ]
+    then
+        source_date="$(date -d "@${SOURCE_DATE_EPOCH}" "+%Y-%m-%d")"
+        echo "VERGEN_GIT_COMMIT_DATE = \"${source_date}\"" >> .cargo/config.toml
+    fi
+    if [ -n "${SOURCE_GIT_HASH}" ]
+    then
+        echo "VERGEN_GIT_SHA = \"${SOURCE_GIT_HASH}\"" >> .cargo/config.toml
+    fi
+    tar pcf vendor.tar .cargo vendor
+    rm -rf .cargo vendor
 
 # Extracts vendored dependencies
 vendor-extract: