how to list all the labels of a PR

Question

how can I output the array of labels associated to a PR. an echo gives me Array as a result:

name: An action test
on:
    pull_request:
        branches: ['master']
jobs:
    generate-matrix:
        runs-on: [Linux]
        container: xxx
        steps:
            - name: test
              run: echo ${{ github.event.pull_request.labels.*.name }}

Answer 1

You can use toJSON function, like this:

name: An action test
on:
    pull_request:
        branches: ['master']
jobs:
    generate-matrix:
        runs-on: [Linux]
        container: xxx
        steps:
            - name: test
              run: echo "${{ toJSON(github.event.pull_request.labels.*.name) }}"

You should get a JSON array like this:

[
  label1,
  label2
]

If you want to use this array in a shell command, you can have a look to this post: GitHub Actions: How to pass toJSON() result to shell commands