wip 2

src/recipe/source.rs

@@ -89,3 +89,23 @@ starlark::starlark_simple_value!(Source);
 
 #[starlark_value(type = "source")]
 impl<'v> StarlarkValue<'v> for Source {}
+
+impl Source {
+    pub fn url(&self) -> &str {
+        match self {
+            Self::Tarball(source) => source.url(),
+            Self::Git(source) => source.url(),
+        }
+    }
+
+    pub fn cache_key(&self) -> &str {
+        match self {
+            Self::Tarball(source) => source.sha256(),
+            Self::Git(source) => source.commit(),
+        }
+    }
+
+    pub fn is_unknown_cache_key(&self) -> bool {
+        matches!(self.cache_key(), "?" | "???")
+    }
+}