GitHub Actions Running Twice on Merge of PR-CodePudding

I have a GitHub action with the following triggers:

name: Continuous Integration

on:
  schedule:
    - cron: "0 */3 * * *"
  push:
    branches:
      - master
      - preview
  pull_request:
    types: [ opened, synchronize, reopened ]
    branches:
      - master
      - preview

It seems to be running twice when a PR is merged in - I see the following: AND

I would expect only to see the one for Push to Preview (because I have the event type for PR as only opened, synchronized, and reopened).

How can I get my PRs to only build once when merging?

CodePudding user response：

As explained in this POST (and thread) on the Github Community.

You can achieve what you want using this trigger condition:

on:
  pull_request:
    types: [closed]

And then use this if condition in your job to guarantee it will run only if the PR has been merged:

jobs:
  build:
    if: github.event.pull_request.merged == 'true'
    steps:
      ...