CatStation/.github/workflows/empty-files.yml

name: Empty Files Checker

on:
  push:
    branches: [ master, staging, stable ]
  merge_group:
  pull_request:
    types: [ opened, reopened, synchronize, ready_for_review ]
    paths:
    - 'Content.Client/**'
    - 'Content.Server/**'
    - 'Content.Shared/**'
    - 'Resources/**'

concurrency:
  group: ${{ github.workflow }}-${{ github.event_name == 'pull_request' && github.event.pull_request.number || github.ref }}
  cancel-in-progress: ${{ github.event_name != 'merge_group' }}

env:
  # Directories to scan for empty files. obj/ and bin/ are skipped
  SEARCH_PATHS: "Content.Client Content.Server Content.Shared Resources"
  # File extensions to check, without dots
  FILE_EXTENSIONS: "cs xaml yaml yml ftl xml json"

jobs:
  check_empty_files:
    name: Check for empty files
    if: github.actor != 'PJBot' && github.event.pull_request.draft == false
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@v7

    - name: Setup Submodule
      run: git submodule update --init

    - name: Find empty files
      shell: bash
      run: |
        set -e

        read -ra paths <<< "$SEARCH_PATHS"
        read -ra exts  <<< "$FILE_EXTENSIONS"

        find_expr=()
        for ext in "${exts[@]}"; do
          find_expr+=( -o -name "*.$ext" )
        done
        find_expr=("${find_expr[@]:1}")   # drop leading -o

        mapfile -t EMPTY < <(
          find "${paths[@]}" \
            \( -name obj -o -name bin \) -prune -o \
            -type f \( "${find_expr[@]}" \) \
            -exec sh -c 'test -z "$(tr -d "[:space:]" < "$1")" && echo "$1"' sh {} \;
        )

        if [ "${#EMPTY[@]}" -gt 0 ]; then
          echo "::error::Found empty files:"
          printf '  - %s\n' "${EMPTY[@]}"
          exit 1
        fi

        echo "No empty files found."