name: CI

on:
  push:
    paths-ignore:
      - "lib/**/*.md"
  pull_request:
    paths-ignore:
      - "lib/**/*.md"

env:
  ELIXIR_ASSERT_TIMEOUT: 2000
  ELIXIRC_OPTS: "--warnings-as-errors"
  ERLC_OPTS: "warnings_as_errors"
  LANG: C.UTF-8

permissions:
  contents: read

jobs:
  test_linux:
    name: Ubuntu 20.04, Erlang/OTP ${{ matrix.otp_version }}
    strategy:
      fail-fast: false
      matrix:
        include:
          - otp_version: "26.0"
            otp_latest: true
          - otp_version: "25.3"
          - otp_version: "25.0"
          - otp_version: "24.3"
          - otp_version: "24.0"
          - otp_version: master
            development: true
          - otp_version: maint
            development: true
    runs-on: ubuntu-20.04
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 50
      - uses: erlef/setup-beam@v1
        with:
          otp-version: ${{ matrix.otp_version }}
      - name: Compile Elixir
        run: |
          make compile
          echo "$PWD/bin" >> $GITHUB_PATH
      - name: Build info
        run: bin/elixir --version
      - name: Check format
        run: make test_formatted && echo "All Elixir source code files are properly formatted."
      - name: Erlang test suite
        run: make test_erlang
        continue-on-error: ${{ matrix.development }}
      - name: Elixir test suite
        run: make test_elixir
        continue-on-error: ${{ matrix.development }}
      - name: Build docs (ExDoc main)
        if: ${{ matrix.otp_latest }}
        run: |
          cd ..
          git clone https://github.com/elixir-lang/ex_doc.git --depth 1
          cd ex_doc
          ../elixir/bin/mix do local.rebar --force + local.hex --force + deps.get + compile
          cd ../elixir/
          make docs
      - name: Check reproducible builds
        run: |
          rm -rf .git
          # Recompile System without .git
          cd lib/elixir && ../../bin/elixirc -o ebin lib/system.ex && cd -
          taskset 1 make check_reproducible
        if: ${{ matrix.otp_latest }}

  test_windows:
    name: Windows Server 2019, Erlang/OTP ${{ matrix.otp_version }}
    strategy:
      matrix:
        otp_version: ["24", "25", "26.0"]
    runs-on: windows-2019
    steps:
      - name: Configure Git
        run: git config --global core.autocrlf input
      - uses: actions/checkout@v4
        with:
          fetch-depth: 50
      - uses: erlef/setup-beam@v1
        with:
          otp-version: ${{ matrix.otp_version }}
      - name: Compile Elixir
        run: |
          Remove-Item -Recurse -Force '.git'
          make compile
      - name: Build info
        run: bin/elixir --version
      - name: Check format
        run: make test_formatted && echo "All Elixir source code files are properly formatted."
      - name: Erlang test suite
        run: make --keep-going test_erlang
      - name: Elixir test suite
        run: |
          Remove-Item 'c:/Windows/System32/drivers/etc/hosts'
          make --keep-going test_elixir

  check_posix_compliant:
    name: Check POSIX-compliant
    runs-on: ubuntu-20.04
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 50
      - name: Install Shellcheck
        run: |
          sudo apt update
          sudo apt install -y shellcheck
      - name: Check POSIX-compliant
        run: |
          shellcheck -e SC2039,2086 bin/elixir && echo "bin/elixir is POSIX compliant"
          shellcheck bin/elixirc && echo "bin/elixirc is POSIX compliant"
          shellcheck bin/iex && echo "bin/iex is POSIX compliant"