rebar3_stale

A rebar3 plugin that runs only tests affected by code changes.

Installation

Add the plugin to your rebar.config:

{project_plugins, [rebar3_stale]}.

Usage

Run only stale EUnit tests:

rebar3 stale eunit

Run only stale Common Test suites:

rebar3 stale ct

Force a full test run with --all:

rebar3 stale eunit --all
rebar3 stale ct --all

On the first run (no manifest exists), all tests are executed.

How It Works

1. Computes MD5 checksums of all .erl and .hrl files
2. Builds a module dependency graph from compiled .beam files
3. Compares checksums against the stored manifest to find changed files
4. Resolves transitively affected modules
5. Filters to test modules (*_tests/*_test for EUnit, *_SUITE for CT) and runs only those

The manifest is stored at _build/test/.rebar3_stale_manifest.

License

MIT