[flutter_tools] cache more directories (#112651)
diff --git a/packages/flutter_tools/lib/src/asset.dart b/packages/flutter_tools/lib/src/asset.dart
index 17b728c..61bee0e 100644
--- a/packages/flutter_tools/lib/src/asset.dart
+++ b/packages/flutter_tools/lib/src/asset.dart
@@ -1019,6 +1019,7 @@
final FileSystem _fileSystem;
final Map<String, List<String>> _cache = <String, List<String>>{};
+ final Map<String, List<File>> _variantsPerFolder = <String, List<File>>{};
List<String> variantsFor(String assetPath) {
final String directory = _fileSystem.path.dirname(assetPath);
@@ -1030,25 +1031,26 @@
if (_cache.containsKey(assetPath)) {
return _cache[assetPath]!;
}
-
- final List<FileSystemEntity> entitiesInDirectory = _fileSystem.directory(directory).listSync();
-
- final File assetFile = _fileSystem.file(assetPath);
- final List<String> pathsOfVariants = <String>[
- // It's possible that the user specifies only explicit variants (e.g. .../1x/asset.png),
- // so there does not necessarily need to be a file at the given path.
- if (assetFile.existsSync())
- assetPath,
- ...entitiesInDirectory
+ if (!_variantsPerFolder.containsKey(directory)) {
+ _variantsPerFolder[directory] = _fileSystem.directory(directory)
+ .listSync()
.whereType<Directory>()
.where((Directory dir) => _assetVariantDirectoryRegExp.hasMatch(dir.basename))
.expand((Directory dir) => dir.listSync())
.whereType<File>()
- .where((File file) => file.basename == assetFile.basename)
+ .toList();
+ }
+ final File assetFile = _fileSystem.file(assetPath);
+ final List<File> potentialVariants = _variantsPerFolder[directory]!;
+ final String basename = assetFile.basename;
+ return _cache[assetPath] = <String>[
+ // It's possible that the user specifies only explicit variants (e.g. .../1x/asset.png),
+ // so there does not necessarily need to be a file at the given path.
+ if (assetFile.existsSync())
+ assetPath,
+ ...potentialVariants
+ .where((File file) => file.basename == basename)
.map((File file) => file.path),
];
-
- _cache[assetPath] = pathsOfVariants;
- return pathsOfVariants;
}
}
diff --git a/packages/flutter_tools/test/general.shard/asset_bundle_test.dart b/packages/flutter_tools/test/general.shard/asset_bundle_test.dart
index e2cd837..ff4e3dc 100644
--- a/packages/flutter_tools/test/general.shard/asset_bundle_test.dart
+++ b/packages/flutter_tools/test/general.shard/asset_bundle_test.dart
@@ -4,7 +4,6 @@
import 'dart:convert';
-import 'package:file/file.dart';
import 'package:file/memory.dart';
import 'package:flutter_tools/src/artifacts.dart';
import 'package:flutter_tools/src/asset.dart';