ensureFlutterFrameworkDependency function

bool ensureFlutterFrameworkDependency(String packageSwiftPath)

Ensures packageSwiftPath declares FlutterFramework at both the package level (dependencies: [...]) and inside the Swift target's dependencies. Idempotent — does nothing when already present.

Handles both the 2-space indented format written by swift_templates.dart and the 4-space indented format written by scaffold_templates.dart.

Returns true if the file was modified.

Implementation

bool ensureFlutterFrameworkDependency(String packageSwiftPath) {
  final file = File(packageSwiftPath);
  if (!file.existsSync()) return false;
  var content = file.readAsStringSync();
  if (content.contains('FlutterFramework')) return false;

  bool modified = false;

  // ── 1. Package-level dependencies block ──────────────────────────────────
  // Anything before the first 'targets:' belongs to the Package(...) struct.
  final targetsIdx = content.indexOf('targets:');
  if (targetsIdx == -1) return false;

  final beforeTargets = content.substring(0, targetsIdx);

  if (beforeTargets.contains('dependencies: [')) {
    // Already has a package-level dependencies array — append into it.
    content = content.replaceFirst(
      'dependencies: [',
      'dependencies: [\n    .package(name: "FlutterFramework", path: "../FlutterFramework"),',
    );
  } else {
    // No package-level dependencies — inject one just before targets:.
    // Detect indent (2-space from swift_templates, 4-space from scaffold_templates).
    final indent = content.contains('  targets:') ? '  ' : '    ';
    content = content.replaceFirst(
      '${indent}targets:',
      '${indent}dependencies: [\n$indent  .package(name: "FlutterFramework", path: "../FlutterFramework"),\n$indent],\n${indent}targets:',
    );
  }
  modified = true;

  // ── 2. Swift target's dependencies ───────────────────────────────────────
  // The Cpp target has no dependencies: entry; the Swift target has one.
  // Handle the inline single-item form: dependencies: ["XxxCpp"]
  final inlineDepRe = RegExp(r'dependencies:\s*\["([^"]+)"\]');
  final m = inlineDepRe.firstMatch(content);
  if (m != null) {
    // Detect the leading whitespace of the matched line to preserve alignment.
    final lineStart = content.lastIndexOf('\n', m.start) + 1;
    final lineIndent = RegExp(r'^ *').firstMatch(content.substring(lineStart))?.group(0) ?? '      ';
    final inner = '$lineIndent  ';
    content = content.replaceFirst(
      m.group(0)!,
      'dependencies: [\n$inner"${m.group(1)!}",\n$inner.product(name: "FlutterFramework", package: "FlutterFramework"),\n$lineIndent]',
    );
  }

  if (modified) file.writeAsStringSync(content);
  return modified;
}