All,

I think I’m an idiot as I can’t seem to figure this out. Namely, a repo I work with can have both trivial and non-trivial PRs. We have our developers label the trivial ones with a label “0 diff trivial”. What I’d like is to have those PRs not run a rather expensive CI step (takes 30 minutes to build) as changing a README file shouldn’t need that.

So following some other threads here I have something a la:

name: Build Tests
on:

pull_request:

types: [opened, synchronize, reopened, labeled, unlabeled]
jobs:

build_cheap:

name: Build Cheap

runs-on: ubuntu-latest

container: foo

steps:

- name: Cancel Previous Runs

uses: styfle/cancel-workflow-action@0.4.0

with:

access_token: ${{ github.token }}

- name: Checkout

uses: actions/checkout@v2

...

build_expensive:

name: Build expensive

if: "!contains(github.event.pull_request.labels.*.name, 'trivial')"

runs-on: ubuntu-latest

container: foo

steps:

- name: Cancel Previous Runs

uses: styfle/cancel-workflow-action@0.4.0

with:

access_token: ${{ github.token }}

- name: Checkout GCM

uses: actions/checkout@v2

My guess is my problem is with not knowing GitHub Actions if syntax. I thought:

    if: "!contains(github.event.pull_request.labels.*.name, 'trivial')"

was the right way to say “Run this job step only if the labels do not have trivial”, but tests seem to show this causes an expensive test. 😕

(Note: I might have other issues as well. Since I care about labels, I added to the types of the on: pull_request. I also tried adding the “Cancel Previous Runs” action since I figured we sometimes have to push to our PRs. But I look and it’s not cancelling so…)