bash helpers for GitHub Actions

GitHub Actions has several workflow commands that are available for use within the ecosystem. If you're building an action, then you can use the GitHub Actions Toolkit, which will provide first class support for these commands. If you're building a workflow, then this bash library may help.

Usage

Check this script in to your repository (you can put it in the .github/workflows folder, where it will be ignored). Then you can source this script in a run step of your workflow.

For example, to set a variable in a step in your workflow:

name: Set a variable
on:
  push:
    branches: [ master ]
jobs:
  variable:
    runs-on: ubuntu-latest
    steps:
    - name: Set a variable
      id: setter
      run: |
        source .github/workflows/actions.sh
        set_output varname $'my\nvariable\ndata'
    - name: Display a variable
      run: echo ${{ steps.setter.outputs.varname }}

Commands

set_output

Sets a variable that can be used by subsequent steps. Carriage returns (\r) and newlines (\n) will be escaped for preservation.