get-changed-charts.yaml

name: Get changed charts in PR

on:
  workflow_call:
    inputs:
      pr_number:
        type: number
        required: true
    outputs:
      charts:
        description: The names of the changed charts in the PR
        value: ${{ jobs.getChangedCharts.outputs.charts }}
      count:
        value: ${{ jobs.getChangedCharts.outputs.count }}

jobs:
  getChangedCharts:
    runs-on: ubuntu-latest
    outputs:
      charts: ${{ steps.getCharts.outputs.charts }}
      count: ${{ steps.getCharts.outputs.count }}
    permissions:
      pull-requests: read
    steps:
      - name: Get all charts
        id: getCharts
        env:
          PULL_REQUEST_NUMBER: ${{ inputs.pr_number }}
          GITHUB_TOKEN: ${{ github.token }}
        run: |
          set -e
          set -o pipefail
          charts="$(gh api --paginate "/repos/${GITHUB_REPOSITORY}/pulls/${PULL_REQUEST_NUMBER}/files" | jq -cr 'map(.filename | select(test("charts/[^/]*")) | split("/") | .[1] | select(.)) | unique')"
          (
            echo charts="$charts"
            echo count="$(<<<"$charts" jq -r length)"
          ) | tee -a "$GITHUB_OUTPUT"