update.yml

name: "Flake Update"

on:
  schedule:
    - cron: '30 16 * * 6'
  workflow_dispatch:

jobs:
  build-system:
    runs-on: ubuntu-latest
    steps:
    - name: "Checkout"
      uses: actions/checkout@v4

    - name: Substituters
      id: substituters
      run: |
        echo "TRUSTED_PUBLIC_KEYS=$(./nix.sh ci_get trusted-public-keys)" >> "$GITHUB_OUTPUT"
        echo "SUBSTITUTERS=$(./nix.sh ci_get trusted-substituters)" >> "$GITHUB_OUTPUT"

    - uses: samueldr/lix-gha-installer-action@latest
      name: "Install Lix"
      with:
        extra_nix_config: |
          trusted-public-keys = ${{ steps.substituters.outputs.TRUSTED_PUBLIC_KEYS }}
          substituters = ${{ steps.substituters.outputs.SUBSTITUTERS }}
          experimental-features = flakes nix-command pipe-operator
          accept-flake-config = true
    - name: "Update flake.lock and nvfetcher"
      run: |
        nix --accept-flake-config --show-trace --print-build-logs --verbose flake update 2>&1 | tee flake-update.txt
        nix develop .#ci --command bash -c nvfetcher 2>&1 | tee nvfetcher-update.txt

    - name: "Write changelog"
      id: changelog
      run: |
        echo "commit_msg=$(echo "chore: update flake.lock & sources ($(date -I))")" >> "$GITHUB_OUTPUT"
        echo "date_week=$(date +%V)" >> "$GITHUB_OUTPUT"
        echo "date_year=$(date +%Y)" >> "$GITHUB_OUTPUT"
        echo "body_file=$PWD/changelog.txt" >> "$GITHUB_OUTPUT"

        echo "Automated Pull Request for Week $(date +%V)" > changelog.txt
        echo "" >> changelog.txt

        echo "Flakes Changelog:" >> changelog.txt
        echo "\`\`\`" >> changelog.txt
        (grep -E "'\s\(|Updated input" flake-update.txt || echo "No changes!") >> changelog.txt
        echo "\`\`\`" >> changelog.txt
        echo "" >> changelog.txt

        echo "Sources Changelog:" >> changelog.txt
        echo "\`\`\`" >> changelog.txt
        (grep -E "→" nvfetcher-update.txt || echo "No changes!") >> changelog.txt
        echo "\`\`\`" >> changelog.txt

        nix fmt

    - name: Create Pull Request
      uses: peter-evans/create-pull-request@v6
      with:
        title: ${{ steps.changelog.outputs.commit_msg }}
        token: ${{ secrets.PR_CREATOR }}
        commit-message: ${{ steps.changelog.outputs.commit_msg }}
        add-paths: |
          _sources/*
          flake.lock
        signoff: true
        delete-branch: true
        branch: flake-update/${{ steps.changelog.outputs.date_year }}-${{ steps.changelog.outputs.date_week }}
        body-path: ${{ steps.changelog.outputs.body_file }}