【GithubActions】matrixを動的に生成してstepを回す

ActionsにチェックボックスUIを追加し､選択した項目についてstepを回すサンプルです｡

実行すると以下のように選択された"fuga"についてstepが実行されます｡

workflow

name: example

on:
  workflow_dispatch:
    inputs:
      hoge:
        description: hoge
        required: false
        type: boolean
        default: false
      fuga:
        description: fuga
        required: false
        type: boolean
        default: false
      ...
jobs:
  set-matrix:
    runs-on: self-hosted
    outputs:
      target: ${{ steps.setmatrix.outputs.target }}
    steps:
      - name: Set dynamic matrix
        id: setmatrix
        run: |
          $tgts = @()
          $inputs = ConvertFrom-Json '${{ toJson(github.event.inputs) }}'
          foreach ($tgt in $inputs.psobject.Properties.Name) {
            if ($inputs.$tgt -eq "true") {
              $tgts += $tgt
            }
          }
          $tgts_str = $tgts -join '","'
          Write-Output "target=[`"$tgts_str`"]" >> $env:GITHUB_OUTPUT
  deploy:
    needs: set-matrix
    runs-on: self-hosted
    strategy:
      matrix:
        target: ${{ fromJson(needs.set-matrix.outputs.target) }}
    steps:
      - uses: actions/checkout@v3
      - name: deploy
        run: powershell -NoProfile -ExecutionPolicy Unrestricted $env:GITHUB_WORKSPACE\.github\example.ps1 ${{ matrix.target }}