Changelog

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All notable changes to this project are documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

Unreleased

0.1.0 - 2026-10-28

Added

  • mix affected.files: prints the test files a change set may affect, from --base <git-ref> or --files <path|->, as text or JSON (schema_version 1), with --explain dependency chains.
  • mix affected.test: runs mix test on that selection, or the whole suite on a full run.
  • mix affected.map: builds the test map (test file to referenced source files) with a compiler tracer, falling back to AST analysis per file.
  • mix affected.report: after a full mix test, lists failed test files a saved selection missed.
  • Dependency graph adapters over mix xref graph: JSON on Elixir 1.19+, DOT before.
  • Detection of tests that read repository files (File.read!, Path.wildcard, @external_resource, ...).
  • Protocol implementations and Mox mocks resolved to the files they stand for.
  • affected: project config: global_invalidation, extra_global_invalidation, ignore and mappings; per-test @moduletag affected_by:.
  • Fail-open selection: anything the library cannot vouch for is a full run.
  • --base is checked before any diff: an empty or blank ref, a ref starting with - (which git would read as an option) or one that does not resolve to a commit is a usage error (exit 1), never an empty change set. A ref with no merge base with HEAD is also exit 1. Diffs pass -- after the revisions, so a ref never collides with a path.
  • --base in a project that is a subdirectory of the repository re-roots changed paths to the project; a change outside it (committed, uncommitted or untracked, whatever the diff.relative config) forces a full run.
  • Globs are checked up front, so a pattern that could never match is an error instead of a silent miss:
    • In affected: config, a malformed glob (an unclosed { or a stray }), a pattern naming a directory ("lib/app/workers", or any glob ending in /), or a glob not in normal form ("lib/./app/**", "lib//app/**") is a usage error (exit 1) that names the fix, such as "lib/app/workers/**". So is a :test_paths/:test_pattern that does not compile.
    • In a test's affected_by, the same globs are dropped and that test file always runs, with a warning on stderr. Selection never crashes on a glob.
    • A test's reads with a malformed literal glob, or a [...] character class, reads everything.