dotfiles/.github/workflows/flake-diff.yml at 44811853e2a3ed01e301b8840d3ed2a23ccea2d8 · ntsk/dotfiles · GitHub

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name: Flake Diff

on:
  pull_request:
    paths:
      - 'nix/flake.lock'

permissions:
  pull-requests: write

jobs:
  diff:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout PR branch
        uses: actions/checkout@v6

      - name: Checkout base branch
        uses: actions/checkout@v6
        with:
          ref: ${{ github.base_ref }}
          path: base

      - name: Install Nix
        uses: cachix/install-nix-action@v31
        with:
          github_access_token: ${{ github.token }}

      - name: Build base profile
        run: |
          nix build ./base/nix#homeConfigurations.x86_64-linux.activationPackage --impure -o base-profile
        env:
          NIXPKGS_ALLOW_UNFREE: 1

      - name: Build PR profile
        run: |
          nix build ./nix#homeConfigurations.x86_64-linux.activationPackage --impure -o pr-profile
        env:
          NIXPKGS_ALLOW_UNFREE: 1

      - name: Generate diff with nvd
        id: nvd
        run: |
          nix run 'nixpkgs#nvd' -- diff ./base-profile ./pr-profile > diff.txt 2>&1 || echo "No changes detected" > diff.txt

      - name: Comment on PR
        uses: actions/github-script@v8
        with:
          script: |
            const fs = require('fs');
            const diff = fs.readFileSync('diff.txt', 'utf8');
            const body = `## 📦 Package Diff\n\n\`\`\`\n${diff}\n\`\`\``;
            const prNumber = context.payload.pull_request.number;

            const { data: comments } = await github.rest.issues.listComments({
              owner: context.repo.owner,
              repo: context.repo.repo,
              issue_number: prNumber,
            });

            const botComment = comments.find(c =>
              c.user.type === 'Bot' && c.body.includes('Package Diff')
            );

            if (botComment) {
              await github.rest.issues.updateComment({
                owner: context.repo.owner,
                repo: context.repo.repo,
                comment_id: botComment.id,
                body: body
              });
            } else {
              await github.rest.issues.createComment({
                owner: context.repo.owner,
                repo: context.repo.repo,
                issue_number: prNumber,
                body: body
              });
            }