name: Create RC Branch

on:
  schedule:
    - cron: "0 3 * * 5"
      timezone: "America/Los_Angeles"
  workflow_dispatch:

permissions: {}

jobs:
  create-rc-branch:
    name: Create RC Branch
    if: github.event_name != 'schedule' || github.repository == 'BerriAI/litellm'
    runs-on: ubuntu-latest
    permissions:
      contents: write
    steps:
      - name: Require main
        env:
          REF: ${{ github.ref }}
        run: |
          if [ "$REF" != "refs/heads/main" ]; then
            echo "::error::rc branches are cut from refs/heads/main only, got $REF"
            exit 1
          fi

      - uses: actions/checkout@08eba0b27e820071cde6df949e0beb9ba4906955 # v4.3.0
        with:
          persist-credentials: false

      - name: Read release version
        id: version
        run: python3 .github/scripts/read_rc_version.py >> "$GITHUB_OUTPUT"

      - name: Create rc branch
        env:
          VERSION: ${{ steps.version.outputs.version }}
        uses: actions/github-script@60a0d83039c74a4aee543508d2ffcb1c3799cdea # v7.0.1
        with:
          script: |
            const branchName = `rc/${process.env.VERSION}`;
            const ref = `heads/${branchName}`;

            const existing = await github.rest.git.getRef({
              owner: context.repo.owner,
              repo: context.repo.repo,
              ref,
            }).catch((error) => {
              if (error.status === 404) {
                return null;
              }
              throw error;
            });
            if (existing !== null) {
              core.setFailed(`Branch ${branchName} already exists at ${existing.data.object.sha}; leaving it untouched`);
              return;
            }

            await github.rest.git.createRef({
              owner: context.repo.owner,
              repo: context.repo.repo,
              ref: `refs/${ref}`,
              sha: context.sha,
            });
            core.info(`Created branch ${branchName} at ${context.sha}`);