This is a GitHub Action that updates a pull request body with a provided template. The pull request body can either be prefixed or suffixed.

Forked and modified from pr-update-action

Create a workflow yaml file (for e.g. .github/workflows/update-pr.yml). See Creating a Workflow file.

• repo-token: secret token to allow making calls to GitHub's rest API (for e.g. ${{ secrets.GITHUB_TOKEN }}). The token will need read and write permissions.

• lowercase-branch: whether to lowercase branch name before matching (default: true)
• body-template: text template to update body with
• body-update-action: whether to prefix or replace body with body-template (default: suffix)
• body-newline-count: number of newlines to separate body and its prefix or suffix (default: 2)

• Value for the head-branch-regex should be provided, otherwise the action will return an error. The value should be a Javascript regular expression.
• body-template can contain any text you want to append to the beginning or end of the PR body
• body-update-action can be set to one of the following values:
  • prefix
  • suffix
• body-template can be set to a GitHub secret if necessary to avoid leaking sensitive data. body-template: ${{ secrets.PR_BODY_TEMPLATE }}

• headMatch: matched text from head branch if any
• bodyUpdated: whether the PR body was updated

So the following yaml

name: "Update Pull Request"
on: pull_request

jobs:
  update_pr:
    runs-on: ubuntu-latest
    steps:
    - uses: devindford/[email protected]
      with:
        repo-token: "${{ secrets.GITHUB_TOKEN }}"
        body-template: |
          This was added after the action ran
          Isn't this cool!
        body-update-action: 'suffix'

The PR body will now have the template language after the initial PR body message