ci.yml

# Copyright (C) 2022 Positron Solutions

# Permission is hereby granted, free of charge, to any person obtaining a copy of
# this software and associated documentation files (the "Software"), to deal in
# the Software without restriction, including without limitation the rights to
# use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
# the Software, and to permit persons to whom the Software is furnished to do so,
# subject to the following conditions:

# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.

# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
# FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
# COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
# IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

name: CI

on: # trigger this workflow on
  push:
    branches: [ $default-branch ] # pushes to the default branch
    paths-ignore:
      - 'README.org'
      - 'CONTRIBUTING.org'
  pull_request_target: # or every pull request, from any branch to any branch
    paths-ignore:
      - 'README.org'
      - 'CONTRIBUTING.org'

  workflow_dispatch:
    # Allows you to run this workflow manually from the Actions tab

jobs:
  continuous-integration: # just a job name

    # Run on every OS and Emacsen
    # Some steps switch logic on os or emacsPkg!
    strategy:
      matrix:
        os: [ubuntu-latest] #, macos-latest
        emacsPkg: [ emacs, emacsGit, ]
    runs-on: ${{ matrix.os }}
    steps:
      - uses: actions/checkout@v3.2.0
        with:
          ref: ${{ github.event.pull_request.head.sha }}
      - uses: cachix/install-nix-action@v20
        with:
          extra_nix_config: |
            access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}
      - uses: cachix/cachix-action@v12
        with:
          # This CACHIX_AUTH_TOKEN & CACHIX_CACHE_NAME are secrets you must set
          # in your repository settings
          name: ${{ secrets.CACHIX_CACHE_NAME }}
          authToken: ${{ secrets.CACHIX_AUTH_TOKEN }}
          extraPullNames: nix-community # look for pre-built binaries from upstream
          # Some paths may confuse cachix.  Add them with a pipe to the pushFilter
          pushFilter: "(.drv.chroot$)"

      # Loading the development shell with frozen versions is important to
      # verify that any flake commands will successfully run straight off of the
      # github repository.
      - name: load the shell with frozen versions
        run: nix develop .github#${{ matrix.emacsPkg }} --ignore-environment --command "emacs" "--version"

      # Linting the package is less useful on multiple version.  Modify the
      # logic if you wish to expand lint coverage.
      - name: lint package
        if: matrix.emacsPkg == 'emacs' && matrix.os == 'ubuntu-latest'
        run: |
          eval "$(nix print-dev-env \
            --override-input nixpkgs github:nixos/nixpkgs/release-22.11 \
            --update-input emacs-overlay \
            .github#${{ matrix.emacsPkg }})"

          # Lint the package
          emacs --script .github/run-shim.el -- lint

          # Lint the tests
          emacs --script .github/run-shim.el -- lint-tests

      - name: run tests
        run: |
          # First load the shell.  Updating inputs will update the view of ELPA
          # Emacs git, and nixpkgs.

          # Possible RUNNER_OS values: Windows Linux MacOS
          # https://docs.github.com/en/actions/learn-github-actions/environment-variables#default-environment-variables

          # These eval "$(nix print-dev-env)" calls alter the shell.  In a
          # non-interactive shell like CI, calling nix develop doesn't have the
          # same behavior.
          if [[ $RUNNER_OS == Linux ]]; then
            eval "$(nix print-dev-env  \
              --override-input nixpkgs github:nixos/nixpkgs/release-22.11 \
              --update-input emacs-overlay \
              .github#${{ matrix.emacsPkg }})"

          else
            eval "$(nix print-dev-env \
              --override-input nixpkgs github:nixos/nixpkgs/nixpkgs-22.11-darwin \
              --update-input emacs-overlay \
              .github#${{ matrix.emacsPkg }})"
          fi

          # Runs the tests in a graphical window (can freeze)
          # emacs --quick --load .github/run-shim.el -- test $GITHUB_SHA

          # Run tests with terminal output and no graphical window
          emacs --script .github/run-shim.el -- test $GITHUB_SHA