name: Build Guix Installer

on:
  push:
    branches:
      - master

  schedule:
    # build every week
    - cron: "0 0 */7 * *"

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

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - name: Git checkout
        uses: actions/checkout@v2

      - name: Install Guix
        uses: PromyLOPh/guix-install-action@v1
        with:
          channels: |
            (cons* (channel
                    (name 'nonguix)
                    (url "https://gitlab.com/nonguix/nonguix")
                    ;; Enable signature verification:
                    (introduction
                     (make-channel-introduction
                      "897c1a470da759236cc11798f4e0a5f7d4d59fbc"
                      (openpgp-fingerprint
                        "2A39 3FFF 68F4 EF7A 3D29  12AF 6F51 20A0 22FB B2D5"))))
                    %default-channels)

      - name: Build ISO
        run: |
          # Write out the channels file so it can be included
          guix describe -f channels > channels.scm

          # Build the image
          image=$(guix system image -t iso9660 installer.scm)

          # Copy the image to the local folder with a better name
          export RELEASE_TAG=$(date +"%Y%m%d%H%M")
          echo "RELEASE_TAG=$RELEASE_TAG" >> $GITHUB_ENV
          cp $image ./guix-installer-$RELEASE_TAG.iso

      - name: Prepare Release Notes
        run: |
          echo $'This installer image was prepared with the following channel configuration:\r\n\r\n```\r\n' > release-notes.md
          cat channels.scm >> release-notes.md
          echo $'\r\n```' >> release-notes.md

      - name: Create Release
        uses: softprops/action-gh-release@v1
        with:
          name: Guix Installer - ${{ env.RELEASE_TAG }}
          tag_name: v${{ env.RELEASE_TAG }}
          body_path: release-notes.md
          files: guix-installer-${{ env.RELEASE_TAG }}.iso
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
          GITHUB_REPOSITORY: SystemCrafters/guix-installer