name: Protobuf Compatibility

permissions:
  contents: read

on:
  pull_request:
    paths:
      - "proto/**"
      - "lib/vector-core/proto/**"
  merge_group:
    types: [checks_requested]

concurrency:
  # `github.ref` is unique for MQ runs and PRs
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true

jobs:
  validate-protos:
    runs-on: ubuntu-24.04
    timeout-minutes: 5
    steps:
      # Run `git checkout`
      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
      # Install the `buf` CLI
      - uses: bufbuild/buf-setup-action@a47c93e0b1648d5651a065437926377d060baa99 # v1.50.0
        with:
          github_token: ${{ secrets.GITHUB_TOKEN }}
      # Perform breaking change detection against the `master` branch
      - uses: bufbuild/buf-breaking-action@c57b3d842a5c3f3b454756ef65305a50a587c5ba # v1.1.4
        with:
          against: "https://github.com/vectordotdev/vector.git#branch=master"