name: Update dependency proxy release assets
on:
  workflow_dispatch:
    inputs:
      tag:
        description: "The tag of CodeQL Bundle release that contains the proxy binaries as release assets"
        type: string
        required: true

jobs:
  update:
    name: Update code and create PR
    timeout-minutes: 15
    runs-on: ubuntu-latest
    permissions:
      contents: write # needed to push the updated files
      pull-requests: write # needed to create the PR
    env:
      RELEASE_TAG: ${{ inputs.tag }}
    steps:
      - name: Check release tag format
        id: checks
        shell: bash
        run: |
          if ! [[ $RELEASE_TAG =~ ^codeql-bundle-v[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
            echo "Invalid release tag: expected a CodeQL bundle tag in the 'codeql-bundle-vM.N.P' format."
            exit 1
          fi

          echo "target_branch=dependency-proxy/$RELEASE_TAG" >> $GITHUB_OUTPUT

      - name: Check that the release exists
        shell: bash
        env:
          GITHUB_TOKEN: "${{ secrets.GITHUB_TOKEN }}"
        run: |
          (gh release view --repo "$GITHUB_REPOSITORY" --json "assets" "$RELEASE_TAG" && echo "Release found.") || exit 1

      - name: Install Node
        uses: actions/setup-node@v4

      - name: Checkout repository
        uses: actions/checkout@v5
        with:
          fetch-depth: 0  # ensure we have all tags and can push commits
          ref: main

      - name: Update git config
        shell: bash
        run: |
          git config --global user.email "41898282+github-actions[bot]@users.noreply.github.com"
          git config --global user.name "github-actions[bot]"

      - name: Update release tag and version
        shell: bash
        run: |
          NOW=$(date +"%Y%m%d%H%M%S") # only used to make sure we don't fetch stale binaries from the toolcache
          sed -i "s|https://github.com/github/codeql-action/releases/download/codeql-bundle-v[0-9.]\+/|https://github.com/github/codeql-action/releases/download/$RELEASE_TAG/|g" ./src/start-proxy-action.ts
          sed -i "s/\"v2.0.[0-9]\+\"/\"v2.0.$NOW\"/g" ./src/start-proxy-action.ts

      - name: Compile TypeScript and commit changes
        shell: bash
        env:
          TARGET_BRANCH: ${{ steps.checks.outputs.target_branch }}
        run: |
          set -exu
          git checkout -b "$TARGET_BRANCH"

          npm run build
          git add ./src/start-proxy-action.ts
          git add ./lib
          git commit -m "Update release used by \`start-proxy\` action"

      - name: Push changes and open PR
        shell: bash
        env:
          GITHUB_TOKEN: "${{ secrets.GITHUB_TOKEN }}"
          TARGET_BRANCH: ${{ steps.checks.outputs.target_branch }}
          PR_FLAG: ${{ (github.event_name == 'workflow_dispatch' && '--draft') || '--dry-run' }}
        run: |
          set -exu
          pr_title="Update release used by \`start-proxy\` to \`$RELEASE_TAG\`"
          pr_body=$(cat << EOF
            This PR updates the \`start-proxy\` action to use the private registry proxy binaries that
            are attached as release assets to the \`$RELEASE_TAG\` release.


            Please do the following before merging:

            - [ ] Verify that the changes to the code are correct.
            - [ ] Mark the PR as ready for review to trigger the CI.
          EOF
          )

          git push origin "$TARGET_BRANCH"
          gh pr create \
            --head "$TARGET_BRANCH" \
            --base "main" \
            --title "${pr_title}" \
            --body "${pr_body}" \
            $PR_FLAG