regen.yml

name: regen

on:
  schedule:
    - cron: "0 7 * * 1"
  workflow_dispatch:

permissions:
  contents: write
  pull-requests: write

jobs:
  regen:
    name: bump protobuf schema pin
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4

      - name: Discover latest archive version
        id: latest
        run: |
          current=$(grep -E 'readonly BUF_PY_VERSION="' scripts/regen.sh \
            | sed -E 's/.*="([^"]+)".*/\1/')
          echo "current=$current" >> "$GITHUB_OUTPUT"
          # Buf does not expose a public version-list endpoint; we resolve
          # `main` to a pinned ref by introspecting the redirect target.
          latest=$(curl -sI \
            "https://buf.build/gen/archive/openstatus/api/protocolbuffers/python/main.zip" \
            | grep -i '^location:' | sed -E 's/.*\/([^/]+)\.zip.*/\1/' | tr -d '\r')
          echo "latest=$latest" >> "$GITHUB_OUTPUT"

      - name: No-op when already up to date
        if: steps.latest.outputs.latest == steps.latest.outputs.current
        run: echo "Already on ${{ steps.latest.outputs.current }}; nothing to do."

      - name: Bump pin and regenerate
        if: steps.latest.outputs.latest != steps.latest.outputs.current
        run: |
          sed -i -E "s/(readonly BUF_PY_VERSION=)\"[^\"]+\"/\1\"${{ steps.latest.outputs.latest }}\"/" \
            scripts/regen.sh
          bash scripts/regen.sh

      - name: Open PR
        if: steps.latest.outputs.latest != steps.latest.outputs.current
        uses: peter-evans/create-pull-request@v6
        with:
          branch: regen/${{ steps.latest.outputs.latest }}
          commit-message: "chore: bump buf schema to ${{ steps.latest.outputs.latest }}"
          title: "chore: bump buf schema to ${{ steps.latest.outputs.latest }}"
          body: |
            Automated bump of the pinned `protocolbuffers/python` archive
            version from `${{ steps.latest.outputs.current }}` to
            `${{ steps.latest.outputs.latest }}`.