Changelog

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All notable changes to this project will be documented in this file.

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

[Unreleased]

[0.2.1] - 2026-08-25

Added

  • {partition} placeholder in history_path: the formatter expands it with the MIX_TEST_PARTITION value ("0" when unset) and mix temper.report / mix temper.clean widen it to * — custom paths are partition-safe by construction instead of by recipe.
  • README FAQ answering the first real-world questions: whether Temper re-runs tests, cross-commit failures, what "Suspects" means, and why a first run reports nothing.
  • mix temper.doctor — setup preflight diagnosing the silent failure modes: formatter not registered for the test env, history_path invisible outside the test env, umbrella child apps whose app-dir runs record nothing, empty history, and records without a usable commit SHA. Exits non-zero on problems so CI can gate setup on it.

[0.2.0] - 2026-08-23

Added

  • TEMPER_SHA, TEMPER_DIRTY and TEMPER_BRANCH environment variables override git context detection — for containers and other environments where git cannot answer. A non-empty TEMPER_SHA activates manual mode and takes priority over CI variables and local git.
  • mix temper.report --by-app groups findings by umbrella child app (derived from file paths), with per-app counts and involved files. JSON findings always carry the derived "app" field.

Changed

  • Recommended dependency line is now only: [:dev, :test], runtime: false, keeping mix temper.report available in the default env.
  • Documented umbrella setup: root-only dependency, formatter registration via config :ex_unit, and a partition-safe shared history path — verified end-to-end on Elixir 1.15 through 1.20.

[0.1.0] - 2026-08-22

Added

  • Temper.Formatter — ExUnit formatter recording every test outcome to .temper/history-{partition}.jsonl, with run context (git SHA, dirty flag, CI provider, seed, partition) and failure signatures. Crash-safe: on any internal error it warns once and goes inert.
  • mix temper.report — flaky tests (divergent outcomes on the same clean git SHA) sorted by flake rate, plus lower-confidence suspects from dirty-tree runs. Options: --json, --min-runs, --history.
  • mix temper.clean — deletes recorded history.
  • History schema v1: append-only JSONL, one denormalized line per test outcome, partition-safe for parallel CI jobs.