nx affected filtered by tag

[gschuager]

Is there any way to get a list of affected projects (as in nx affected:apps or libs) which have a certain tag?

The use case is that I'm trying to mix angular apps with .NET apps in a single monorepo. In my CI config, I intend to have separate jobs to lint (or test) typescript projects and .NET projects: each of these tasks require a different base docker image (node vs .NET sdk) and I'd like to have a way to run some target on the corresponding subset of affected projects.

[Akta3d]

Same wish for e2e target, where I need different CI jobs with different docker image

[fguitton]

Hopefully we can obtain some traction in #10085 !
🌴

[gioragutt]

// tools/find-affected.js

// @ts-check

const { Workspaces } = require('@nrwl/devkit');
const { execSync } = require('child_process');
const { join } = require('path');

const [tag = null] = process.argv.slice(2);

if (!tag) {
  console.error(`Missing tag`);
  process.exit(1);
}

const workspace = new Workspaces(
  join(__dirname, '..')
).readWorkspaceConfiguration();

const projects = execSync('yarn -s nx print-affected --select projects')
  .toString('utf-8')
  .trim()
  .split(', ')
  .filter((project) => !!project);

const affected = projects.filter((project) =>
  workspace.projects[project].tags?.includes(tag)
);

const affectedMatrix = JSON.stringify(affected);
const hasAffected = affected.length > 0;

console.log(JSON.stringify({ affectedMatrix, hasAffected }));

This is the utility script that I've been using in my CI:

name: E2E

on:
  pull_request:
  workflow_dispatch:
  push:
    branches:
      - master

jobs:
  affected:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v2
        with:
          fetch-depth: 0

      - name: Setup node
        uses: ./.github/actions/setup-node
        with:
          node-auth-token: ${{ secrets.ORG_GITHUB_PACKAGES_READER }}

      - name: Find affected
        id: find-affected
        run: echo "::set-output name=affected::$(node ./tools/find-affected.js type:nx-plugin-e2e)"

      - name: Print Affected
        run: echo ${{ fromJSON(steps.find-affected.outputs.affected).affectedMatrix }}

    outputs:
      affected: ${{ fromJSON(steps.find-affected.outputs.affected).affectedMatrix }}
      has-affected: ${{ fromJSON(steps.find-affected.outputs.affected).hasAffected }}

  e2e:
    needs: affected
    runs-on: ubuntu-latest
    if: ${{ fromJSON(needs.affected.outputs.has-affected) }}

    strategy:
      matrix:
        app: ${{ fromJSON(needs.affected.outputs.affected) }}

    steps:
      - name: Checkout
        uses: actions/checkout@v2
        with:
          fetch-depth: 0

      - name: Setup node
        uses: ./.github/actions/setup-node
        with:
          node-auth-token: ${{ secrets.ORG_GITHUB_PACKAGES_READER }}

      - run: yarn nx e2e ${{ matrix.app }}

Having it built-in would be very nice indeed