add_label.yml

name: "Add labels"

on:
  pull_request:

permissions:
  pull-requests: write

jobs:
  apply-label:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
        with:
          ref: ${{ github.event.pull_request.head.sha }}
          fetch-depth: 0

      - uses: snnaplab/get-labels-action@v1

      - uses: actions/github-script@v7
        with:
          script: |
            const currentLabels = JSON.parse(process.env.LABELS)
            if (currentLabels.length > 0) {
              github.rest.issues.removeLabel({
                issue_number: context.issue.number,
                owner: context.repo.owner,
                repo: context.repo.repo,
                name: currentLabels
              })
            }
            console.log(currentLabels)

            const { execSync } = require('child_process')
            const { commits } = context.payload.pull_request
            const rawFiles = execSync(`git diff --name-only HEAD HEAD~${commits}`).toString()
            const files = rawFiles.split('\n').filter(Boolean)

            // verify packages
            const packagesFiles = files.filter(file => file.startsWith('packages/') && !file.includes('mix_lint_test'))
            const packages = packagesFiles.map(file => file.split('/')[1])
            const labels = Array.from(new Set(packages))

            // verify documentation 
            const wasDocModified = files.filter(file => file.startsWith('website/')).length > 0
            if (wasDocModified) {
              labels.push('documentation')
            }

            // verify examples
            const wasExampleModified = files.filter(file => file.startsWith('examples/')).length > 0
            if (wasExampleModified) {
              labels.push('examples')
            }

            // verify repo
            const wasRepoModified = files.filter(file => !file.startsWith('website/') && !file.startsWith('packages/') && !file.startsWith('examples/')).length > 0
            if (wasRepoModified) {
              labels.push('repo')
            }

            console.log(labels)

            github.rest.issues.addLabels({
              issue_number: context.issue.number,
              owner: context.repo.owner,
              repo: context.repo.repo,
              labels: labels
            })