refactor

crates/signed_git/src/lib.rs

@@ -7,7 +7,7 @@ use anyhow::{Context, Result, bail};
 use gix::diff::blob::unified_diff::{ConsumeHunk, DiffLineKind as GixLineKind, HunkHeader};
 use gix::interrupt::IS_INTERRUPTED;
 use gix::progress::Discard;
-use signed_core::RepoAddr;
+use signed_core::{Announcement, RepoAddr};
 
 /// On-disk cache of cloned repositories, keyed by owner pubkey / repo id.
 #[derive(Debug, Clone)]
@@ -1061,6 +1061,15 @@ pub fn sanitize_path_component(id: &str) -> String {
     sanitized
 }
 
+/// The refs namespace of a fork's import in the target mirror.
+pub fn fork_namespace(announcement: &Announcement) -> String {
+    format!(
+        "{}/{}",
+        announcement.owner.to_hex(),
+        sanitize_path_component(&announcement.id)
+    )
+}
+
 /// In-memory object cache for history walks, see [`open_with_cache`].
 ///
 /// Without one, a walk re-decodes the same commit objects from the object database.
@@ -2378,6 +2387,21 @@ mod tests {
         assert_eq!(sanitize_path_component("a/../b"), "a_.._b");
     }
 
+    #[test]
+    fn fork_namespace_combines_owner_and_sanitized_id() {
+        let keys = Keys::generate();
+        let event = EventBuilder::new(Kind::GitRepoAnnouncement, "")
+            .tags([Tag::parse(["d", "my/repo"]).expect("valid tag")])
+            .finalize(&keys)
+            .expect("signed event");
+        let announcement = Announcement::from_event(&event).expect("parses");
+
+        assert_eq!(
+            fork_namespace(&announcement),
+            format!("{}/my_repo", keys.public_key().to_hex())
+        );
+    }
+
     #[test]
     fn repo_path_stays_inside_root() {
         let cache = GitCache::new("/cache".into());