update-ngx-wasm-module.yml

name: Update ngx_wasm_module dependency

#description: >
#  This workflow updates the NGX_WASM_MODULE dependency in .requirements to the
#  latest HEAD from Kong/ngx_wasm_module and opens a PR for it. It is designed
#  to run periodically or on-demand.

on:
  schedule:
  # run weekly
  - cron: '0 0 * * 0'
  workflow_dispatch:
  pull_request:

jobs:
  update:
    runs-on: ubuntu-22.04

    permissions:
      # required to create a branch and push commits
      contents: write
      # required to open a PR for updates
      pull-requests: write

    steps:
    - name: Checkout Kong source code
      uses: actions/checkout@v4

    - name: Detect current version of NGX_WASM_MODULE in .requirements
      id: check-kong
      run: |
        SHA=$(sed -nre 's/^NGX_WASM_MODULE=([^ ]+) .*/\1/p' < .requirements)
        echo "sha=$SHA" | tee -a "$GITHUB_OUTPUT"

    - name: Check Kong/ngx_wasm_module HEAD
      id: check-repo
      env:
        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
      run: |
        SHA=$(gh api repos/Kong/ngx_wasm_module/commits/main | jq -r .sha)
        echo "sha=$SHA" | tee -a "$GITHUB_OUTPUT"

    - name: Update .requirements and create a pull request
      if: steps.check-kong.outputs.sha != steps.check-repo.outputs.sha
      run: |
        gh auth login --with-token <<< "$GITHUB_TOKEN"
        gh auth setup-git

        readonly BRANCH=chore/deps-bump-ngx-wasm-module
        git switch --create "$BRANCH"

        sed -i \
          -re 's/^NGX_WASM_MODULE=.*/NGX_WASM_MODULE=${{ steps.check-repo.outputs.sha }}/' \
          .requirements

        git add .requirements
        git commit \
          -m 'chore(deps): bump NGX_WASM_MODULE to ${{ steps.check-repo.outputs.sha }}'

        # TODO: handle branch-already-exists

        git push origin "$HEAD"

        # TODO: handle PR-already-exists
        gh pr create \
          --base master \
          --head "$BRANCH" \
          --fill