# Copyright (c) HashiCorp, Inc.
# SPDX-License-Identifier: MPL-2.0

# This workflow detects if there is a diff in the `agent/uiserver/dist` directory
# which is used by Consul to serve its embedded UI.
# `agent/uiserver/dist` should not be manually updated.

name: Embedded Asset Checker

on:
  pull_request:
    types: [opened, synchronize, labeled, unlabeled, reopened]
    # Runs on PRs to main and all release branches
    branches:
      - main
      - release/*

jobs:
  dist-check:
    if: "! ( contains(github.event.pull_request.labels.*.name, 'pr/update-ui-assets') || github.event.pull_request.user.login == 'hc-github-team-consul-core' )"
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2
        with:
          ref: ${{ github.event.pull_request.head.sha }}
          fetch-depth: 0 # by default the checkout action doesn't checkout all branches
      - name: Check for agent/uiserver/dist dir change in diff
        run: |
          dist_files=$(git --no-pager diff --name-only HEAD "$(git merge-base HEAD "origin/${{ github.event.pull_request.base.ref }}")" -- agent/uiserver/dist)
          if [[ -z "${dist_files}" ]]; then
            exit 0
          fi
          
          echo "Found diffs in dir agent/uiserver/dist"
          github_message="This PR has diffs in \`agent/uiserver/dist\`. If the changes are intentional, add the label \`pr/update-ui-assets\`. Otherwise, revert changes to \`agent/uiserver/dist\`."
          curl -s -H "Authorization: token ${{ secrets.PR_COMMENT_TOKEN }}" \
            -X POST \
            -d "{ \"body\": \"${github_message}\"}" \
            "https://api.github.com/repos/${GITHUB_REPOSITORY}/issues/${{ github.event.pull_request.number }}/comments"
          exit 1