monorepo-split-plan.yml

name: Monorepo Split
on:
    push:
        branches: [main]
        tags:
            - 'v*'
        paths:
            - '.github/monorepo-split.json'
            - '.github/scripts/monorepo-split-plan.php'
            - '.github/workflows/monorepo-split-plan.yml'
            - 'src/SonsOfPHP/**/composer.json'
            - 'src/**'
    pull_request:
        branches: [main]
        paths:
            - '.github/monorepo-split.json'
            - '.github/scripts/monorepo-split-plan.php'
            - '.github/workflows/monorepo-split-plan.yml'
            - 'src/SonsOfPHP/**/composer.json'
            - 'src/**'
    workflow_dispatch:
        inputs:
            base:
                description: 'Base git ref for changed-package replay'
                required: false
            head:
                description: 'Head git ref to check out and publish'
                required: true
                default: 'main'
            tag:
                description: 'Optional release tag to publish instead of a branch range'
                required: false
            publish:
                description: 'Actually push split refs instead of calculating only'
                required: true
                type: boolean
                default: false

permissions:
    contents: read

concurrency:
    group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
    cancel-in-progress: true

jobs:
    plan:
        name: Split packages
        runs-on: ubuntu-latest
        steps:
            - uses: actions/checkout@v7
              with:
                  fetch-depth: 0
                  persist-credentials: false
            - uses: shivammathur/setup-php@v2
              with:
                  php-version: '8.3'
                  coverage: none
            - uses: actions/setup-go@v7
              with:
                  go-version: '1.22'
                  cache: false
            - name: Install splitsh-lite
              run: |
                  sudo apt-get update
                  sudo apt-get install -y build-essential cmake libssh2-1-dev libssl-dev pkg-config zlib1g-dev
                  curl -LsSf https://github.com/libgit2/libgit2/archive/refs/tags/v1.5.0.tar.gz | tar -xz
                  cmake -S libgit2-1.5.0 -B libgit2-1.5.0/build \
                      -DCMAKE_BUILD_TYPE=Release \
                      -DCMAKE_INSTALL_PREFIX=/usr/local/libgit2-1.5 \
                      -DBUILD_TESTS=OFF
                  cmake --build libgit2-1.5.0/build --parallel 2
                  sudo cmake --install libgit2-1.5.0/build
                  echo "PKG_CONFIG_PATH=/usr/local/libgit2-1.5/lib/pkgconfig" >> "$GITHUB_ENV"
                  echo "LD_LIBRARY_PATH=/usr/local/libgit2-1.5/lib" >> "$GITHUB_ENV"
                  export PKG_CONFIG_PATH=/usr/local/libgit2-1.5/lib/pkgconfig
                  export LD_LIBRARY_PATH=/usr/local/libgit2-1.5/lib
                  GOBIN="$RUNNER_TEMP/bin" go install github.com/splitsh/lite@master
                  sudo mv "$RUNNER_TEMP/bin/lite" /usr/local/bin/splitsh-lite
                  splitsh-lite --help
            - uses: actions/create-github-app-token@v3
              id: app-token
              if: github.event_name == 'push' || (github.event_name == 'workflow_dispatch' && inputs.publish)
              with:
                  client-id: ${{ secrets.MONOREPO_SPLIT_APP_CLIENT_ID }}
                  private-key: ${{ secrets.MONOREPO_SPLIT_APP_PRIVATE_KEY }}
                  owner: ${{ github.repository_owner }}
                  permission-contents: write
            - name: Configure read-only repo token auth
              if: github.event_name == 'push' || (github.event_name == 'workflow_dispatch' && inputs.publish)
              env:
                  GH_TOKEN: ${{ steps.app-token.outputs.token }}
              run: |
                  echo "GIT_TERMINAL_PROMPT=0" >> "$GITHUB_ENV"
                  auth_header="AUTHORIZATION: basic $(printf 'x-access-token:%s' "$GH_TOKEN" | base64 -w0)"
                  git config --global http.https://github.com/.extraheader "$auth_header"
            - name: Validate split config
              run: php .github/scripts/monorepo-split-plan.php
            - name: Plan pull request package splits
              if: github.event_name == 'pull_request'
              run: |
                  php .github/scripts/monorepo-split-plan.php \
                      --base='${{ github.event.pull_request.base.sha }}' \
                      --head='${{ github.event.pull_request.head.sha }}' \
                      --origin=HEAD \
                      --calculate-splits
            - name: Publish mainline package splits
              if: github.event_name == 'push' && !startsWith(github.ref, 'refs/tags/')
              run: |
                  php .github/scripts/monorepo-split-plan.php \
                      --base='${{ github.event.before }}' \
                      --head='${{ github.sha }}' \
                      --origin=HEAD \
                      --publish
            - name: Publish release tag package splits
              if: github.event_name == 'push' && startsWith(github.ref, 'refs/tags/')
              run: |
                  php .github/scripts/monorepo-split-plan.php \
                      --tag='${{ github.ref_name }}' \
                      --origin='${{ github.ref }}' \
                      --publish
            - name: Run manual split replay
              if: github.event_name == 'workflow_dispatch'
              env:
                  BASE_REF: ${{ inputs.base }}
                  HEAD_REF: ${{ inputs.head }}
                  TAG_NAME: ${{ inputs.tag }}
                  PUBLISH_SPLITS: ${{ inputs.publish }}
              run: |
                  if [ -n "$TAG_NAME" ]; then
                      git fetch --force origin "refs/tags/$TAG_NAME:refs/tags/$TAG_NAME"
                      command=(php .github/scripts/monorepo-split-plan.php --tag="$TAG_NAME" --origin="refs/tags/$TAG_NAME")
                  else
                      if [ -z "$BASE_REF" ]; then
                          echo "::error::Manual branch replay requires the base input."
                          exit 1
                      fi

                      git update-ref refs/heads/monorepo-split-replay-head "$HEAD_REF"
                      command=(php .github/scripts/monorepo-split-plan.php --base="$BASE_REF" --head="$HEAD_REF" --origin=refs/heads/monorepo-split-replay-head)
                  fi

                  if [ "$PUBLISH_SPLITS" = "true" ]; then
                      command+=(--publish)
                  else
                      command+=(--calculate-splits)
                  fi

                  "${command[@]}"