ci: disable setup-beam problem matchers to quiet dep-warning annotations #12

	---
	name: CI

	on: # yamllint disable-line rule:truthy
	workflow_dispatch:
	workflow_call:
	pull_request:

	jobs:
	test:
	name: Test
	runs-on: ubuntu-latest
	defaults:
	run:
	working-directory: app
	steps:
	-
	uses: actions/checkout@v7
	-
	uses: erlef/setup-beam@v1
	with:
	otp-version: "29.0.3"
	elixir-version: "1.20.3"
	# Without this, setup-beam's problem matchers promote every
	# compiler warning from deps (e.g. postgrex/rewrite's deprecated
	# `xref: [exclude: ...]`, yamerl's deprecated `catch ...` syntax -
	# both already at their latest published Hex versions, so not
	# fixable from here) into noisy GH Actions annotations. See #9.
	disable_problem_matchers: true
	-
	name: Cache deps/build
	uses: actions/cache@v6
	with:
	path: \|
	app/deps
	app/_build
	key: ${{ runner.os }}-mix-${{ hashFiles('app/mix.lock') }}
	-
	run: mix deps.get
	-
	run: mix format --check-formatted
	-
	run: mix test

	conventional_commits:
	name: Validate Commit Subjects
	runs-on: ubuntu-latest
	steps:
	-
	uses: actions/checkout@v7
	with:
	fetch-depth: 0
	# pull_request's default ref is the synthetic refs/pull/N/merge test-merge
	# commit (subject "Merge <sha> into <sha>"), not the PR branch tip - check
	# out the real head SHA instead so that commit is never in the validated
	# range. Falls back to github.sha for non-PR triggers (workflow_dispatch/
	# workflow_call), where github.event.pull_request is unset.
	ref: ${{ github.event.pull_request.head.sha \|\| github.sha }}
	-
	env:
	FETCH_BASE_REF: "true"
	run: ./ci/conventional_commits.sh

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