is-workspace-affected

Description

Github Action that tests if an yarn workspace is affected by diff with another branch. Affected means we find one file under the workspace root inside the return of git diff. A workspace A depending on another workspace B will also be affected if B is affected by changes.

How to use it

name: Build affected

on:
  pull_request:
    branches: [master]

jobs:
  build:
    runs-on: ubuntu-latest
    
    steps:
      - uses: actions/checkout@v2
      
      - uses: neoxia/is-workspace-affected@v2.1.0
        id: affected
        with:
          workspace: front
          base: master
      
      - name: Build
        if: steps.affected.outputs.affected
        run: yarn workspace front run build

This will build the front workspace if it (or it's dependencies) has any difference with the version on master branch. Here we you a branch, be you can also use a tag, this will allow test on the same branch.

Inputs

Name	Default	Description
project-root	'.'	Yarn project root
workspace	required	Yarn workspace to check
base	required	Base to compute diff. Supports branchs and tags. The needed revision will be fetched by the action.
pattern	'**'	Files to search in the diff. Relative to tested workspace root.

Pattern

The pattern allow to filter the diff. If you set the following pattern '*.js' the action will search for files matching /project/workspace/*.js in the diff (here /project/workspace is the root of the workspace).
Supports any pattern supported by minimatch.

Outputs

Name	Description
affected	Will be truthy if the workspace is affected by changes.