name: "Shell scripts"

on:
  pull_request:
    paths:
      - "**.sh"
      - ".github/workflows/shellcheck.yaml"
  push:
    branches: ["main"]
    paths:
      - "**.sh"
      - ".github/workflows/shellcheck.yaml"
  workflow_dispatch: null

permissions: {}

# Only allow one run of the workflow per branch / PR at a time.
concurrency:
  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
  cancel-in-progress: true

jobs:
  shellcheck:
    name: "shellcheck"

    permissions:
      contents: read

    runs-on: ubuntu-26.04
    timeout-minutes: 10

    # Pinned, since findings differ across shellcheck versions.
    container: koalaman/shellcheck-alpine:v0.11.0@sha256:9955be09ea7f0dbf7ae942ac1f2094355bb30d96fffba0ec09f5432207544002

    steps:
      - name: "Checkout repository"
        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
        with:
          persist-credentials: false

      - name: "Run shellcheck"
        run: find . -name '*.sh' -not -path './.git/*' -exec shellcheck {} +