name: Buildifier

on:
  pull_request:
    paths:
    - '**/*.bzl'
    - '**/*.bazel'
    - 'BUILD*'
    - 'WORKSPACE*'
  push:
    paths:
    - '**/*.bzl'
    - '**/*.bazel'
    - 'BUILD*'
    - 'WORKSPACE*'
    branches:
    - master
    - release/*

jobs:

  autoformat:
    name: Auto-format and Check
    runs-on: ubuntu-22.04

    steps:
      - name: Check out code
        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2

      - name: Install Dependencies
        run: |
          sudo wget -O /bin/buildifier https://github.com/bazelbuild/buildtools/releases/download/5.1.0/buildifier-linux-amd64
          sudo chmod +x /bin/buildifier

      - name: Run buildifier
        run: |
          buildifier -mode=fix $(find . -name 'BUILD*' -o -name 'WORKSPACE*' -o -name '*.bzl' -o -name '*.bazel' -type f)

      - name: Verify buildifier
        shell: bash
        run: |
          # From: https://backreference.org/2009/12/23/how-to-match-newlines-in-sed/
          # This is to leverage this workaround:
          # https://github.com/actions/toolkit/issues/193#issuecomment-605394935
          function urlencode() {
            sed ':begin;$!N;s/\n/%0A/;tbegin'
          }
          if [[ $(git diff-index --name-only HEAD --) ]]; then
              for x in $(git diff-index --name-only HEAD --); do
                echo "::error file=$x::Please run buildifier.%0A$(git diff $x | urlencode)"
              done
              echo "${{ github.repository }} is out of style. Please run buildifier."
              exit 1
          fi
          echo "${{ github.repository }} is formatted correctly."