elixir.yml

# This workflow uses actions that are not certified by GitHub.
# They are provided by a third-party and are governed by
# separate terms of service, privacy policy, and support
# documentation.

name: Elixir CI

env:
  MIX_ENV: test

on:
  push:
    branches: [ "main" ]
  pull_request:
    branches: [ "main" ]

permissions:
  actions: write
  contents: read

jobs:
  pre_job:
    name: check for duplicate checkers
    # continue-on-error: true # Uncomment once integration is finished
    runs-on: ubuntu-latest
    # Map a step output to a job output
    outputs:
      should_skip: ${{ steps.skip_check.outputs.should_skip }}
    steps:
    - id: skip_check
      uses: fkirc/skip-duplicate-actions@v5
      with:
        paths_ignore: '["**.md", "docs/**"]'
        cancel_others: true

  build:
    needs: pre_job
    if: needs.pre_job.outputs.should_skip != 'true'
    name: Build and test
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@v4
    - uses: DeterminateSystems/nix-installer-action@main
    - uses: DeterminateSystems/magic-nix-cache-action@main
    - uses: DeterminateSystems/flake-checker-action@main
    - name: Restore dependencies cache
      uses: actions/cache@v4
      with:
        path: deps
        key: ${{ runner.os }}-mix-${{ hashFiles('**/mix.lock') }}
        restore-keys: ${{ runner.os }}-mix-
    - name: install mix
      run: nix develop -c mix local.hex
    - name: Run flakes check
      run: |
        nix flake check
        nix develop -c echo OK
    - name: Install dependencies
      run: nix develop -c mix deps.get
    # - name: Run Credo
    #   run: mix credo --strict
    - name: Retrieve PLT Cache
      uses: actions/cache@v4
      id: plt-cache
      with:
        path: priv/plts
        key: ${{ runner.os }}-${{ matrix.otp }}-${{ matrix.elixir }}-plts-${{ hashFiles(format('{0}{1}', github.workspace, '/mix.*')) }}-${{ hashFiles(format('{0}{1}', github.workspace, '/flake.*')) }}
    - name: Create PLTs
      if: steps.plt-cache.outputs.cache-hit != 'true'
      run: |
        mkdir -p priv/plts
        nix develop -c mix dialyzer --plt
    - name: Run dialyzer
      run: nix develop -c mix dialyzer --no-check --halt-exit-status
    - name: Check Formatting
      run: nix develop -c mix format --check-formatted
    - name: Run tests
      run: nix develop -c mix test
    # - name: Build docs
    #   run: mix docs