Recursively compiles all '*.module.scss' files under directory into sibling '*.module.css' files.

sass_compiler.dart

import 'dart:io';
import 'package:path/path.dart' as p;
import 'package:sass/sass.dart' as sass;

/// Recursively compiles all `*.module.scss` files under directory into sibling `*.module.css` files.
void main(List<String> arguments) {
  final src = arguments[0];
  final srcDir = Directory('$src');

  if (!srcDir.existsSync()) {
    stderr.writeln('$src directory not found: ${p.normalize(srcDir.path)}');
    exitCode = 1;
    return;
  }

  final scssFiles = srcDir
      .listSync(recursive: true, followLinks: false)
      .whereType<File>()
      .where((f) => f.path.endsWith('.module.scss'))
      .toList();

  if (scssFiles.isEmpty) {
    stdout.writeln('No .module.scss files found under $src/.');
    return;
  }

  var success = 0;
  var failed = 0;
  var removed = 0;

  for (final file in scssFiles) {
    final inputPath = p.normalize(file.path);
    final outputPath = inputPath.replaceFirst(RegExp(r'\.module\.scss$'), '.module.css');

    try {
      final result = sass.compileToResult(inputPath);
      File(outputPath).writeAsStringSync(result.css);
      stdout.writeln('Compiled: ${p.relative(inputPath)} → ${p.relative(outputPath)}');
      success++;

      try {
        file.deleteSync();
        removed++;
        stdout.writeln('Removed source: ${p.relative(inputPath)}');
      } catch (e) {
        stderr.writeln('Warning: could not remove ${p.relative(inputPath)} — $e');
      }
    } catch (e) {
      stderr.writeln('Failed: ${p.relative(inputPath)} — $e');
      failed++;
    }
  }

  stdout.writeln('Done. Success: $success, Failed: $failed, Removed: $removed');
  exitCode = failed > 0 ? 1 : 0;
}