update-dependencies.yml

# What to call this GitHub Action workflow in the GitHub browser UI
name: Update Dependencies

# Set up environment variables for this runner
env:
  # For using `gh`, the GitHub CLI (to create a PR):
  GH_TOKEN: ${{secrets.GITHUB_TOKEN}}
  # The branch to commit updated dependency versions to
  BRANCH_NAME: update-deps

# When to run this GitHub Action
on:
  # Run when changes pushed to main branch (Uncomment for debugging)
  # push:
  #   branches:
  #     - main
  schedule:
    # Run every day at midnight UTC
    # Note: During peak load times, GitHub may delay this time
    - cron: '0 0 * * *'

jobs:
  update_deps: # job name
    # Only run this GitHub Action on the original repo, not on forks
    if: github.repository_owner == 'apollographql'
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
        with:
          # Fetch all branches when checking out the repo
          fetch-depth: 0
      - uses: actions/setup-node@v3
        with:
          node-version: 18
      - name: 'Check out branch'
        run: |
          git branch --remotes
          echo "*********"

          # Check if a branch already exists with the specified BRANCH_NAME.
          CHECK_BRANCH_OUTPUT=$(git branch --remotes | grep "origin/${BRANCH_NAME}" | wc -l )
          # Strip the spaces from CHECK_BRANCHES_OUTPUT.
          # Will be set to 1 if a matching branch is found, or 0 otherwise.
          DOES_BRANCH_EXIST=${CHECK_BRANCH_OUTPUT// }

          # If it does, check it out
          if [ $DOES_BRANCH_EXIST = 1 ]
          then
            echo "Checking out existing branch: ${BRANCH_NAME}"
            git checkout $BRANCH_NAME
          # If it doesn't, check out a new branch with that name
          else
            echo "Checking out a new branch: ${BRANCH_NAME}"
            git checkout -b $BRANCH_NAME
          fi
      - name: 'Install dependencies'
        run: |
          npm install
      - name: 'Update dependencies'
        run: |
          npm update
      - name: 'Commit & push changes'
        run: |
          git status
          echo "*********"

          # Check if there are unstaged changes to commit
          CHECK_FOR_UNSTAGED_CHANGES=$(git status | grep "Changes not staged for commit:" | wc -l)
          # Strip the spaces from CHECK_FOR_UNSTAGED_CHANGES.
          # Will be set to 1 if there are changes to be commited, or 0 otherwise.
          UNSTAGED_CHANGES_EXIST=${CHECK_FOR_UNSTAGED_CHANGES// }

          if [ $UNSTAGED_CHANGES_EXIST = 1 ]
          then
            # Commit and push changes
            git config user.name github-actions
            git config user.email github-actions@github.com
            git add .
            git commit -m "chore: updated dependencies"
            git push --set-upstream origin $BRANCH_NAME
            echo "Pushed changes to remote branch $BRANCH_NAME"
          fi
      - name: 'Open pull request'
        run: |
          git branch --remotes
          echo "*********"

          # Check if a remote branch exists with the specified BRANCH_NAME.
          CHECK_BRANCH_OUTPUT=$(git branch --remotes | grep "origin/${BRANCH_NAME}" | wc -l )
          # Strip the spaces from CHECK_BRANCHES_OUTPUT.
          # Will be set to 1 if a matching branch is found, or 0 otherwise.
          DOES_BRANCH_EXIST=${CHECK_BRANCH_OUTPUT// }

          # If there isn't a remote branch, we can't create a PR, so return early.
          if [ $DOES_BRANCH_EXIST != 1 ]
          then
            echo "No remote branch $BRANCH_NAME. Exiting without opening a pull request."
            return
          fi

          gh pr status --json number,state
          echo "*********"

          # Check if an open pull request already exists for the current branch.
          # Will be set to "OPEN" if PR is found for the current branch.
          # Otherwise, may be set to "CLOSED", "MERGED", or empty string (if no PRs exist for current branch yet).
          CURRENT_BRANCH_PR_STATE=$(gh pr status --json number,state --jq ".currentBranch?.state")

          # If there isn't a PR for this branch yet, create one.
          if [ "$CURRENT_BRANCH_PR_STATE" != "OPEN" ]
          then
            echo "Creating a new PR using branch: ${BRANCH_NAME}"
            gh pr create --fill
          fi