[tinder-maxwellelliott]

…/tango

Hashing:

• A source label that names a directory now hashes the whole tree (names, kinds, contents, exec bits, symlink targets). Previously a directory was hashed as a missing file, so edits inside it never impacted anything.
• Repository rules (//external:*) pinned by sha256 or integrity are hashed without url/urls: a mirror or registry move cannot change what they fetch.
• The main-repository files a repository rule's attributes name (patches, build files, lock files) are hashed by content into the repository's definition, so a changed patch is a changed repository.
• Dependency cycles in the query graph no longer fail hashing. The back edge is hashed from the entered target's own definition and targets are visited in label order, so the digest is deterministic regardless of query output order. A one-line warning names each cycle.

serve:

• Cache entries are keyed by the commit's tree hash instead of its SHA, so a rebase, an amended message, or a merge commit that changes no file reuses the entry.
• Full-content hashes seed source hashes from git ls-tree blob ids instead of reading every tracked file. The scoped modifiedFilepaths path keeps its disk-read semantics, and the configuration fingerprint carries a token so entries from builds without this seeding are never mixed in.

[BarrettStephen]

Have you taken a look at Tango's graph caching and diffing feature to skip calling bazel query?