xcodegen.yml

# XcodeGen drift gate.
#
# The .xcodeproj is generated from `project.yml` but committed to the repo so
# contributors can `open Cotabby.xcodeproj` without installing XcodeGen first.
# That convenience only holds if the committed project stays byte-identical to
# what `xcodegen generate` produces. This job regenerates on every PR and fails
# if the result differs from what's checked in — catching the case where
# someone edits the project in Xcode (or hand-edits the pbxproj) without
# mirroring the change into `project.yml`.
#
# Sibling to Build/Lint/Tests: one gate, one file, one clear failure mode.

name: XcodeGen

on:
  pull_request:
    branches: [main]
  push:
    branches: [main]

concurrency:
  group: xcodegen-${{ github.ref }}
  cancel-in-progress: true

jobs:
  drift:
    name: project.yml matches Cotabby.xcodeproj
    runs-on: macos-latest
    timeout-minutes: 5
    steps:
      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2

      - name: Install / verify XcodeGen
        run: |
          if ! command -v xcodegen >/dev/null; then
            brew install xcodegen
          fi
          xcodegen --version

      - name: Regenerate project
        run: xcodegen generate

      # XcodeGen only rewrites the tracked project files (pbxproj + shared
      # schemes); Package.resolved is gitignored and untouched here. Scope the
      # check to the project so unrelated working-tree noise can't fail it.
      - name: Verify no drift
        run: |
          if ! git diff --exit-code -- Cotabby.xcodeproj; then
            echo "::error::Cotabby.xcodeproj is out of sync with project.yml." \
              "Run 'xcodegen generate' and commit the result." >&2
            exit 1
          fi