Nx: affected:test inside github action

[jimdubbs]

Please describe the behavior you are expecting

Current Behavior

What is the current behavior?
When utilizing nx tools like affected:test and affected:build within a github action, it always returns "no affected projects to run". I cannot find any information on why this functionality would not work from within a github action.

running nx 8.3.

[FrozenPandaz]

Sorry, I'm afraid I am not too familiar with Github Actions but I will try to answer anyways.

By default, affected compares to master. If your action runs on the latest commit of master.. there are no differences to affect projects.

I assume you want to use Github actions for things like pull requests.

Github seems to provide some environment variables: https://developer.github.com/actions/creating-github-actions/accessing-the-runtime-environment/#environment-variables

The following are particularly interesting:

• GITHUB_REF This is which branch/commit the PR is based on
• GITHUB_SHA This is the commit of the PR

These values may or may not be set to helpful values depending on the type of action: https://developer.github.com/actions/managing-workflows/workflow-configuration-options/#events-supported-in-workflow-files

When they are defined, you would probably want to run affected with --base $GITHUB_REF --head $GITHUB_SHA.

[gperdomor]

@jimdubbs any progress with this?

[gperdomor]

@jimdubbs this works... Uses the target branch when is a MR and the previous commit in the case of push event 😄

name: ci

on: [push, pull_request]

jobs:
  build:
    runs-on: ${{ matrix.os }}

    strategy:
      matrix:
        node-version: [10.x, 12.x]
        os: [ubuntu-18.04, windows-2019, macOS-10.14]

    steps:
      - uses: actions/checkout@v1

      - name: Use Node.js
        uses: actions/setup-node@v1
        with:
          node-version: ${{ matrix.node-version }}

      - name: Install
        run: |
          npm install

      - name: Run lint
        shell: bash
        run: |
          if [[ $GITHUB_BASE_REF ]]
          then
            export NX_BASE=remotes/origin/$GITHUB_BASE_REF
          else
            export NX_BASE=$(git rev-parse HEAD~1)
          fi
          echo "Base => $NX_BASE"
          npm run format:check -- --base=$NX_BASE
          npm run affected:lint -- --base=$NX_BASE

[vsavkin]

@gperdomor thank you!

It looks like there is a way to get the base SHA. So I'm going to close this issue.

[aifrim]

Sadly, this approach does not work with the actions/checkout@v2, had to revert back to the first version and it works.

Will investigate this further
Thank you @gperdomor