Don't run action on both branch and pull request

[DanySK]

I’ve got a continuous integration workflow which is quite heavy, with multiplatform testing.
I want it to run:

• On pushes, on any branch
• On pull requests coming from other repositories

I currently enabled push and pull_request, but in case of pull requests from branches coming from the same repository, I get the build doubled. Since I already got a branch protection rule preventing merges of unsynced PRs, there is never the case in which I can have different results between the branch and pull request build.

How can I disable it in such case?

[Simran-B]

• You can rely on naming conventions to restrict on: pull_request to branches with a colon in them (typically just the case with PRs from forked repos)
  How to trigger an action on push or pull request but not both?
• You can skip jobs conditionally e.g. like so:
  if: github.event_name == 'push' || (github.event_name == 'pull_request' && github.repository != github.event.pull_request.head.repo.full_name)
  Is there a way to tell if a PR is from a forked repository?

[Simran-B]

I suppose you could also restrict push to the default branch (main/master). pull_request will take care of pushes to other branches (type synchronize).