how do i actually use this?

[simkimsia]

i copied your existing workflow word for word

but nothing happened

on:
  issue_comment:
    types: [created]

jobs:
  fast_forward_job:
    name: Fast Forward
    if: github.event.issue.pull_request != '' && contains(github.event.comment.body, '/fast-forward')
    runs-on: ubuntu-latest
    steps:
      # To use this repository's private action, you must check out the repository
      - name: Checkout
        uses: actions/checkout@v2
      # Basic use case example
      - name: Fast Forward PR
        id: ff-action
        uses:  ./
        with:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
          success_message: 'Success! Fast forwarded ***target_base*** to ***source_head***! ```git checkout target_base && git merge source_head --ff-only``` '
          failure_message: 'Failed! Cannot do fast forward!'

as fast-forward.yml then i type /fast-forward in a pull request as comment. nothing happened

[simkimsia]

Tried on a private repo. definitely does not work

What i use as fast-forward.yml this time

on:
  issue_comment:
    types: [created]

jobs:
  fast_forward_job:
    name: Fast Forward
    if: github.event.issue.pull_request != '' && contains(github.event.comment.body, '/fast-forward')
    runs-on: ubuntu-latest
    steps:
      # To use this repository's private action, you must check out the repository
      - name: Fast Forward PR
        uses: endre-spotlab/[email protected]

[demisx]

Worked for me. 🤷🏻‍♂️ Here is my fast-forward-pr.yml:

name: Fast-Forward PR

on: 
  issue_comment:
    types: [created]

jobs:
  fast_forward_job:
    name: Fast Forward
    if: github.event.issue.pull_request != '' && contains(github.event.comment.body, '/fast-forward')   
    runs-on: ubuntu-latest
    steps:
      # To use this repository's private action, you must check out the repository
      - name: Checkout code into workspace directory
        uses: actions/checkout@v2
        with:
          fetch-depth: 0
      # Basic use case example
      - name: Fast Forward PR
        id: ff-action
        uses: endre-spotlab/fast-forward-js-action@master
        with:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
          success_message: 'Success! Fast forwarded ***target_base*** to ***source_head***! ```git checkout target_base && git merge source_head --ff-only``` '
          failure_message: 'Failed! Cannot do fast forward!'
          staging_branch: 'main'
          production_branch: 'prod'

[mhostetter]

@demisx your action worked for me too. 😃

[vly-ginger]

My guess is that, if your uses is ./, then you need to have:

action.yml
dist/
  <all the .js files>

from this repo as well. Otherwise, there is no action, so it does nothing. Or worse, if you have your own ./action.yml that does something else, it will unintentionally be triggered.