blob: c11234c4d4e3a8bf731c0c76c50c469e3619fba9 [file] [log] [blame]
// Copyright 2014 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// @dart = 2.8
import 'package:meta/meta.dart';
import 'package:package_config/package_config.dart';
import 'base/context.dart';
import 'base/deferred_component.dart';
import 'base/file_system.dart';
import 'base/logger.dart';
import 'base/platform.dart';
import 'build_info.dart';
import 'cache.dart';
import 'convert.dart';
import 'dart/package_map.dart';
import 'devfs.dart';
import 'flutter_manifest.dart';
import 'license_collector.dart';
import 'project.dart';
const String defaultManifestPath = 'pubspec.yaml';
const String kFontManifestJson = 'FontManifest.json';
/// The effect of adding `uses-material-design: true` to the pubspec is to insert
/// the following snippet into the asset manifest:
///
///```yaml
/// material:
/// - family: MaterialIcons
/// fonts:
/// - asset: fonts/MaterialIcons-Regular.otf
///```
const List<Map<String, Object>> kMaterialFonts = <Map<String, Object>>[
<String, Object>{
'family': 'MaterialIcons',
'fonts': <Map<String, Object>>[
<String, Object>{
'asset': 'fonts/MaterialIcons-Regular.otf',
},
],
},
];
/// Injected factory class for spawning [AssetBundle] instances.
abstract class AssetBundleFactory {
/// The singleton instance, pulled from the [AppContext].
static AssetBundleFactory get instance => context.get<AssetBundleFactory>();
static AssetBundleFactory defaultInstance({
@required Logger logger,
@required FileSystem fileSystem,
@required Platform platform,
bool splitDeferredAssets = false,
}) => _ManifestAssetBundleFactory(logger: logger, fileSystem: fileSystem, platform: platform, splitDeferredAssets: splitDeferredAssets);
/// Creates a new [AssetBundle].
AssetBundle createBundle();
}
abstract class AssetBundle {
Map<String, DevFSContent> get entries;
/// The files that were specified under the deferred components assets sections
/// in pubspec.
Map<String, Map<String, DevFSContent>> get deferredComponentsEntries;
/// Additional files that this bundle depends on that are not included in the
/// output result.
List<File> get additionalDependencies;
bool wasBuiltOnce();
bool needsBuild({ String manifestPath = defaultManifestPath });
/// Returns 0 for success; non-zero for failure.
Future<int> build({
String manifestPath = defaultManifestPath,
String assetDirPath,
@required String packagesPath,
bool deferredComponentsEnabled = false,
TargetPlatform targetPlatform,
});
}
class _ManifestAssetBundleFactory implements AssetBundleFactory {
_ManifestAssetBundleFactory({
@required Logger logger,
@required FileSystem fileSystem,
@required Platform platform,
bool splitDeferredAssets = false,
}) : _logger = logger,
_fileSystem = fileSystem,
_platform = platform,
_splitDeferredAssets = splitDeferredAssets;
final Logger _logger;
final FileSystem _fileSystem;
final Platform _platform;
final bool _splitDeferredAssets;
@override
AssetBundle createBundle() => ManifestAssetBundle(logger: _logger, fileSystem: _fileSystem, platform: _platform, splitDeferredAssets: _splitDeferredAssets);
}
/// An asset bundle based on a pubspec.yaml file.
class ManifestAssetBundle implements AssetBundle {
/// Constructs an [ManifestAssetBundle] that gathers the set of assets from the
/// pubspec.yaml manifest.
ManifestAssetBundle({
@required Logger logger,
@required FileSystem fileSystem,
@required Platform platform,
bool splitDeferredAssets = false,
}) : _logger = logger,
_fileSystem = fileSystem,
_platform = platform,
_splitDeferredAssets = splitDeferredAssets,
_licenseCollector = LicenseCollector(fileSystem: fileSystem);
final Logger _logger;
final FileSystem _fileSystem;
final LicenseCollector _licenseCollector;
final Platform _platform;
final bool _splitDeferredAssets;
@override
final Map<String, DevFSContent> entries = <String, DevFSContent>{};
@override
final Map<String, Map<String, DevFSContent>> deferredComponentsEntries = <String, Map<String, DevFSContent>>{};
// If an asset corresponds to a wildcard directory, then it may have been
// updated without changes to the manifest. These are only tracked for
// the current project.
final Map<Uri, Directory> _wildcardDirectories = <Uri, Directory>{};
DateTime _lastBuildTimestamp;
static const String _kAssetManifestJson = 'AssetManifest.json';
static const String _kNoticeFile = 'NOTICES';
// Comically, this can't be name with the more common .gz file extension
// because when it's part of an AAR and brought into another APK via gradle,
// gradle individually traverses all the files of the AAR and unzips .gz
// files (b/37117906). A less common .Z extension still describes how the
// file is formatted if users want to manually inspect the application
// bundle and is recognized by default file handlers on OS such as macOS.˚
static const String _kNoticeZippedFile = 'NOTICES.Z';
@override
bool wasBuiltOnce() => _lastBuildTimestamp != null;
@override
bool needsBuild({ String manifestPath = defaultManifestPath }) {
if (_lastBuildTimestamp == null) {
return true;
}
final FileStat stat = _fileSystem.file(manifestPath).statSync();
if (stat.type == FileSystemEntityType.notFound) {
return true;
}
for (final Directory directory in _wildcardDirectories.values) {
if (!directory.existsSync()) {
return true; // directory was deleted.
}
for (final File file in directory.listSync().whereType<File>()) {
final DateTime dateTime = file.statSync().modified;
if (dateTime == null) {
continue;
}
if (dateTime.isAfter(_lastBuildTimestamp)) {
return true;
}
}
}
return stat.modified.isAfter(_lastBuildTimestamp);
}
@override
Future<int> build({
String manifestPath = defaultManifestPath,
String assetDirPath,
@required String packagesPath,
bool deferredComponentsEnabled = false,
TargetPlatform targetPlatform,
}) async {
assetDirPath ??= getAssetBuildDirectory();
FlutterProject flutterProject;
try {
flutterProject = FlutterProject.fromDirectory(_fileSystem.file(manifestPath).parent);
} on Exception catch (e) {
_logger.printStatus('Error detected in pubspec.yaml:', emphasis: true);
_logger.printError('$e');
return 1;
}
if (flutterProject == null) {
return 1;
}
final FlutterManifest flutterManifest = flutterProject.manifest;
// If the last build time isn't set before this early return, empty pubspecs will
// hang on hot reload, as the incremental dill files will never be copied to the
// device.
_lastBuildTimestamp = DateTime.now();
if (flutterManifest.isEmpty) {
entries[_kAssetManifestJson] = DevFSStringContent('{}');
return 0;
}
final String assetBasePath = _fileSystem.path.dirname(_fileSystem.path.absolute(manifestPath));
final PackageConfig packageConfig = await loadPackageConfigWithLogging(
_fileSystem.file(packagesPath),
logger: _logger,
);
final List<Uri> wildcardDirectories = <Uri>[];
// The _assetVariants map contains an entry for each asset listed
// in the pubspec.yaml file's assets and font and sections. The
// value of each image asset is a list of resolution-specific "variants",
// see _AssetDirectoryCache.
final List<String> excludeDirs = <String>[
assetDirPath,
getBuildDirectory(),
if (flutterProject.ios.existsSync())
flutterProject.ios.hostAppRoot.path,
if (flutterProject.macos.existsSync())
flutterProject.macos.managedDirectory.path,
if (flutterProject.windows.existsSync())
flutterProject.windows.managedDirectory.path,
if (flutterProject.linux.existsSync())
flutterProject.linux.managedDirectory.path,
];
final Map<_Asset, List<_Asset>> assetVariants = _parseAssets(
packageConfig,
flutterManifest,
wildcardDirectories,
assetBasePath,
excludeDirs: excludeDirs,
);
if (assetVariants == null) {
return 1;
}
// Parse assets for deferred components.
final Map<String, Map<_Asset, List<_Asset>>> deferredComponentsAssetVariants = _parseDeferredComponentsAssets(
flutterManifest,
packageConfig,
assetBasePath,
wildcardDirectories,
flutterProject.directory,
excludeDirs: excludeDirs,
);
if (!_splitDeferredAssets || !deferredComponentsEnabled) {
// Include the assets in the regular set of assets if not using deferred
// components.
for (final String componentName in deferredComponentsAssetVariants.keys) {
assetVariants.addAll(deferredComponentsAssetVariants[componentName]);
}
deferredComponentsAssetVariants.clear();
deferredComponentsEntries.clear();
}
final bool includesMaterialFonts = flutterManifest.usesMaterialDesign;
final List<Map<String, dynamic>> fonts = _parseFonts(
flutterManifest,
packageConfig,
primary: true,
);
// Add fonts, assets, and licenses from packages.
final Map<String, List<File>> additionalLicenseFiles = <String, List<File>>{};
for (final Package package in packageConfig.packages) {
final Uri packageUri = package.packageUriRoot;
if (packageUri != null && packageUri.scheme == 'file') {
final String packageManifestPath = _fileSystem.path.fromUri(packageUri.resolve('../pubspec.yaml'));
final FlutterManifest packageFlutterManifest = FlutterManifest.createFromPath(
packageManifestPath,
logger: _logger,
fileSystem: _fileSystem,
);
if (packageFlutterManifest == null) {
continue;
}
// Collect any additional licenses from each package.
final List<File> licenseFiles = <File>[];
for (final String relativeLicensePath in packageFlutterManifest.additionalLicenses) {
final String absoluteLicensePath = _fileSystem.path.fromUri(package.root.resolve(relativeLicensePath));
licenseFiles.add(_fileSystem.file(absoluteLicensePath).absolute);
}
additionalLicenseFiles[packageFlutterManifest.appName] = licenseFiles;
// Skip the app itself
if (packageFlutterManifest.appName == flutterManifest.appName) {
continue;
}
final String packageBasePath = _fileSystem.path.dirname(packageManifestPath);
final Map<_Asset, List<_Asset>> packageAssets = _parseAssets(
packageConfig,
packageFlutterManifest,
// Do not track wildcard directories for dependencies.
<Uri>[],
packageBasePath,
packageName: package.name,
attributedPackage: package,
);
if (packageAssets == null) {
return 1;
}
assetVariants.addAll(packageAssets);
if (!includesMaterialFonts && packageFlutterManifest.usesMaterialDesign) {
_logger.printError(
'package:${package.name} has `uses-material-design: true` set but '
'the primary pubspec contains `uses-material-design: false`. '
'If the application needs material icons, then `uses-material-design` '
' must be set to true.'
);
}
fonts.addAll(_parseFonts(
packageFlutterManifest,
packageConfig,
packageName: package.name,
primary: false,
));
}
}
// Save the contents of each image, image variant, and font
// asset in entries.
for (final _Asset asset in assetVariants.keys) {
final File assetFile = asset.lookupAssetFile(_fileSystem);
if (!assetFile.existsSync() && assetVariants[asset].isEmpty) {
_logger.printStatus('Error detected in pubspec.yaml:', emphasis: true);
_logger.printError('No file or variants found for $asset.\n');
if (asset.package != null) {
_logger.printError('This asset was included from package ${asset.package.name}.');
}
return 1;
}
// The file name for an asset's "main" entry is whatever appears in
// the pubspec.yaml file. The main entry's file must always exist for
// font assets. It need not exist for an image if resolution-specific
// variant files exist. An image's main entry is treated the same as a
// "1x" resolution variant and if both exist then the explicit 1x
// variant is preferred.
if (assetFile.existsSync()) {
assert(!assetVariants[asset].contains(asset));
assetVariants[asset].insert(0, asset);
}
for (final _Asset variant in assetVariants[asset]) {
final File variantFile = variant.lookupAssetFile(_fileSystem);
assert(variantFile.existsSync());
entries[variant.entryUri.path] ??= DevFSFileContent(variantFile);
}
}
// Save the contents of each deferred component image, image variant, and font
// asset in deferredComponentsEntries.
if (deferredComponentsAssetVariants != null) {
for (final String componentName in deferredComponentsAssetVariants.keys) {
deferredComponentsEntries[componentName] = <String, DevFSContent>{};
for (final _Asset asset in deferredComponentsAssetVariants[componentName].keys) {
final File assetFile = asset.lookupAssetFile(_fileSystem);
if (!assetFile.existsSync() && deferredComponentsAssetVariants[componentName][asset].isEmpty) {
_logger.printStatus('Error detected in pubspec.yaml:', emphasis: true);
_logger.printError('No file or variants found for $asset.\n');
if (asset.package != null) {
_logger.printError('This asset was included from package ${asset.package.name}.');
}
return 1;
}
// The file name for an asset's "main" entry is whatever appears in
// the pubspec.yaml file. The main entry's file must always exist for
// font assets. It need not exist for an image if resolution-specific
// variant files exist. An image's main entry is treated the same as a
// "1x" resolution variant and if both exist then the explicit 1x
// variant is preferred.
if (assetFile.existsSync()) {
assert(!deferredComponentsAssetVariants[componentName][asset].contains(asset));
deferredComponentsAssetVariants[componentName][asset].insert(0, asset);
}
for (final _Asset variant in deferredComponentsAssetVariants[componentName][asset]) {
final File variantFile = variant.lookupAssetFile(_fileSystem);
assert(variantFile.existsSync());
deferredComponentsEntries[componentName][variant.entryUri.path] ??= DevFSFileContent(variantFile);
}
}
}
}
final List<_Asset> materialAssets = <_Asset>[
if (flutterManifest.usesMaterialDesign)
..._getMaterialAssets(),
];
for (final _Asset asset in materialAssets) {
final File assetFile = asset.lookupAssetFile(_fileSystem);
assert(assetFile.existsSync());
entries[asset.entryUri.path] ??= DevFSFileContent(assetFile);
}
// Update wildcard directories we we can detect changes in them.
for (final Uri uri in wildcardDirectories) {
_wildcardDirectories[uri] ??= _fileSystem.directory(uri);
}
final DevFSStringContent assetManifest = _createAssetManifest(assetVariants, deferredComponentsAssetVariants);
final DevFSStringContent fontManifest = DevFSStringContent(json.encode(fonts));
final LicenseResult licenseResult = _licenseCollector.obtainLicenses(packageConfig, additionalLicenseFiles);
if (licenseResult.errorMessages.isNotEmpty) {
licenseResult.errorMessages.forEach(_logger.printError);
return 1;
}
additionalDependencies = licenseResult.dependencies;
if (wildcardDirectories.isNotEmpty) {
// Force the depfile to contain missing files so that Gradle does not skip
// the task. Wildcard directories are not compatible with full incremental
// builds. For more context see https://github.com/flutter/flutter/issues/56466 .
_logger.printTrace(
'Manifest contained wildcard assets. Inserting missing file into '
'build graph to force rerun. for more information see #56466.'
);
final int suffix = Object().hashCode;
additionalDependencies.add(
_fileSystem.file('DOES_NOT_EXIST_RERUN_FOR_WILDCARD$suffix').absolute);
}
_setIfChanged(_kAssetManifestJson, assetManifest);
_setIfChanged(kFontManifestJson, fontManifest);
_setLicenseIfChanged(licenseResult.combinedLicenses, targetPlatform);
return 0;
}
@override
List<File> additionalDependencies = <File>[];
void _setIfChanged(String key, DevFSStringContent content) {
if (!entries.containsKey(key)) {
entries[key] = content;
return;
}
final DevFSStringContent oldContent = entries[key] as DevFSStringContent;
if (oldContent.string != content.string) {
entries[key] = content;
}
}
void _setLicenseIfChanged(
String combinedLicenses,
TargetPlatform targetPlatform,
) {
// On the web, don't compress the NOTICES file since the client doesn't have
// dart:io to decompress it. So use the standard _setIfChanged to check if
// the strings still match.
if (targetPlatform == TargetPlatform.web_javascript) {
_setIfChanged(_kNoticeFile, DevFSStringContent(combinedLicenses));
return;
}
// On other platforms, let the NOTICES file be compressed. But use a
// specialized DevFSStringCompressingBytesContent class to compare
// the uncompressed strings to not incur decompression/decoding while making
// the comparison.
if (!entries.containsKey(_kNoticeZippedFile) ||
!(entries[_kNoticeZippedFile] as DevFSStringCompressingBytesContent)
.equals(combinedLicenses)) {
entries[_kNoticeZippedFile] = DevFSStringCompressingBytesContent(
combinedLicenses,
// A zlib dictionary is a hinting string sequence with the most
// likely string occurrences at the end. This ends up just being
// common English words with domain specific words like copyright.
hintString: 'copyrightsoftwaretothisinandorofthe',
);
}
}
List<_Asset> _getMaterialAssets() {
final List<_Asset> result = <_Asset>[];
for (final Map<String, Object> family in kMaterialFonts) {
for (final Map<String, Object> font in family['fonts'] as List<Map<String, Object>>) {
final Uri entryUri = _fileSystem.path.toUri(font['asset'] as String);
result.add(_Asset(
baseDir: _fileSystem.path.join(Cache.flutterRoot, 'bin', 'cache', 'artifacts', 'material_fonts'),
relativeUri: Uri(path: entryUri.pathSegments.last),
entryUri: entryUri,
package: null,
));
}
}
return result;
}
List<Map<String, dynamic>> _parseFonts(
FlutterManifest manifest,
PackageConfig packageConfig, {
String packageName,
@required bool primary,
}) {
return <Map<String, dynamic>>[
if (primary && manifest.usesMaterialDesign)
...kMaterialFonts,
if (packageName == null)
...manifest.fontsDescriptor
else
for (Font font in _parsePackageFonts(
manifest,
packageName,
packageConfig,
)) font.descriptor,
];
}
Map<String, Map<_Asset, List<_Asset>>> _parseDeferredComponentsAssets(
FlutterManifest flutterManifest,
PackageConfig packageConfig,
String assetBasePath,
List<Uri> wildcardDirectories,
Directory projectDirectory, {
List<String> excludeDirs = const <String>[],
}) {
final List<DeferredComponent> components = flutterManifest.deferredComponents;
final Map<String, Map<_Asset, List<_Asset>>> deferredComponentsAssetVariants = <String, Map<_Asset, List<_Asset>>>{};
if (components == null) {
return deferredComponentsAssetVariants;
}
for (final DeferredComponent component in components) {
deferredComponentsAssetVariants[component.name] = <_Asset, List<_Asset>>{};
final _AssetDirectoryCache cache = _AssetDirectoryCache(<String>[], _fileSystem);
for (final Uri assetUri in component.assets) {
if (assetUri.path.endsWith('/')) {
wildcardDirectories.add(assetUri);
_parseAssetsFromFolder(
packageConfig,
flutterManifest,
assetBasePath,
cache,
deferredComponentsAssetVariants[component.name],
assetUri,
excludeDirs: excludeDirs,
);
} else {
_parseAssetFromFile(
packageConfig,
flutterManifest,
assetBasePath,
cache,
deferredComponentsAssetVariants[component.name],
assetUri,
excludeDirs: excludeDirs,
);
}
}
}
return deferredComponentsAssetVariants;
}
DevFSStringContent _createAssetManifest(
Map<_Asset, List<_Asset>> assetVariants,
Map<String, Map<_Asset, List<_Asset>>> deferredComponentsAssetVariants
) {
final Map<String, List<String>> jsonObject = <String, List<String>>{};
final List<_Asset> assets = assetVariants.keys.toList();
final Map<_Asset, List<String>> jsonEntries = <_Asset, List<String>>{};
for (final _Asset main in assets) {
jsonEntries[main] = <String>[
for (final _Asset variant in assetVariants[main])
variant.entryUri.path,
];
}
if (deferredComponentsAssetVariants != null) {
for (final Map<_Asset, List<_Asset>> componentAssets in deferredComponentsAssetVariants.values) {
for (final _Asset main in componentAssets.keys) {
jsonEntries[main] = <String>[
for (final _Asset variant in componentAssets[main])
variant.entryUri.path,
];
}
}
}
final List<_Asset> sortedKeys = jsonEntries.keys.toList()
..sort((_Asset left, _Asset right) => left.entryUri.path.compareTo(right.entryUri.path));
for (final _Asset main in sortedKeys) {
jsonObject[main.entryUri.path] = jsonEntries[main];
}
return DevFSStringContent(json.encode(jsonObject));
}
/// Prefixes family names and asset paths of fonts included from packages with
/// 'packages/<package_name>'
List<Font> _parsePackageFonts(
FlutterManifest manifest,
String packageName,
PackageConfig packageConfig,
) {
final List<Font> packageFonts = <Font>[];
for (final Font font in manifest.fonts) {
final List<FontAsset> packageFontAssets = <FontAsset>[];
for (final FontAsset fontAsset in font.fontAssets) {
final Uri assetUri = fontAsset.assetUri;
if (assetUri.pathSegments.first == 'packages' &&
!_fileSystem.isFileSync(_fileSystem.path.fromUri(
packageConfig[packageName].packageUriRoot.resolve('../${assetUri.path}')))) {
packageFontAssets.add(FontAsset(
fontAsset.assetUri,
weight: fontAsset.weight,
style: fontAsset.style,
));
} else {
packageFontAssets.add(FontAsset(
Uri(pathSegments: <String>['packages', packageName, ...assetUri.pathSegments]),
weight: fontAsset.weight,
style: fontAsset.style,
));
}
}
packageFonts.add(Font('packages/$packageName/${font.familyName}', packageFontAssets));
}
return packageFonts;
}
/// Given an assetBase location and a pubspec.yaml Flutter manifest, return a
/// map of assets to asset variants.
///
/// Returns null on missing assets.
///
/// Given package: 'test_package' and an assets directory like this:
///
/// - assets/foo
/// - assets/var1/foo
/// - assets/var2/foo
/// - assets/bar
///
/// This will return:
/// ```
/// {
/// asset: packages/test_package/assets/foo: [
/// asset: packages/test_package/assets/foo,
/// asset: packages/test_package/assets/var1/foo,
/// asset: packages/test_package/assets/var2/foo,
/// ],
/// asset: packages/test_package/assets/bar: [
/// asset: packages/test_package/assets/bar,
/// ],
/// }
/// ```
Map<_Asset, List<_Asset>> _parseAssets(
PackageConfig packageConfig,
FlutterManifest flutterManifest,
List<Uri> wildcardDirectories,
String assetBase, {
List<String> excludeDirs = const <String>[],
String packageName,
Package attributedPackage,
}) {
final Map<_Asset, List<_Asset>> result = <_Asset, List<_Asset>>{};
final _AssetDirectoryCache cache = _AssetDirectoryCache(excludeDirs, _fileSystem);
for (final Uri assetUri in flutterManifest.assets) {
if (assetUri.path.endsWith('/')) {
wildcardDirectories.add(assetUri);
_parseAssetsFromFolder(
packageConfig,
flutterManifest,
assetBase,
cache,
result,
assetUri,
excludeDirs: excludeDirs,
packageName: packageName,
attributedPackage: attributedPackage,
);
} else {
_parseAssetFromFile(
packageConfig,
flutterManifest,
assetBase,
cache,
result,
assetUri,
excludeDirs: excludeDirs,
packageName: packageName,
attributedPackage: attributedPackage,
);
}
}
// Add assets referenced in the fonts section of the manifest.
for (final Font font in flutterManifest.fonts) {
for (final FontAsset fontAsset in font.fontAssets) {
final _Asset baseAsset = _resolveAsset(
packageConfig,
assetBase,
fontAsset.assetUri,
packageName,
attributedPackage,
);
final File baseAssetFile = baseAsset.lookupAssetFile(_fileSystem);
if (!baseAssetFile.existsSync()) {
_logger.printError('Error: unable to locate asset entry in pubspec.yaml: "${fontAsset.assetUri}".');
return null;
}
result[baseAsset] = <_Asset>[];
}
}
return result;
}
void _parseAssetsFromFolder(
PackageConfig packageConfig,
FlutterManifest flutterManifest,
String assetBase,
_AssetDirectoryCache cache,
Map<_Asset, List<_Asset>> result,
Uri assetUri, {
List<String> excludeDirs = const <String>[],
String packageName,
Package attributedPackage,
}) {
final String directoryPath = _fileSystem.path.join(
assetBase, assetUri.toFilePath(windows: _platform.isWindows));
if (!_fileSystem.directory(directoryPath).existsSync()) {
_logger.printError('Error: unable to find directory entry in pubspec.yaml: $directoryPath');
return;
}
final Iterable<File> files = _fileSystem
.directory(directoryPath)
.listSync()
.whereType<File>();
for (final File file in files) {
final String relativePath = _fileSystem.path.relative(file.path, from: assetBase);
final Uri uri = Uri.file(relativePath, windows: _platform.isWindows);
_parseAssetFromFile(
packageConfig,
flutterManifest,
assetBase,
cache,
result,
uri,
packageName: packageName,
attributedPackage: attributedPackage,
);
}
}
void _parseAssetFromFile(
PackageConfig packageConfig,
FlutterManifest flutterManifest,
String assetBase,
_AssetDirectoryCache cache,
Map<_Asset, List<_Asset>> result,
Uri assetUri, {
List<String> excludeDirs = const <String>[],
String packageName,
Package attributedPackage,
}) {
final _Asset asset = _resolveAsset(
packageConfig,
assetBase,
assetUri,
packageName,
attributedPackage,
);
final List<_Asset> variants = <_Asset>[];
final File assetFile = asset.lookupAssetFile(_fileSystem);
for (final String path in cache.variantsFor(assetFile.path)) {
final String relativePath = _fileSystem.path.relative(path, from: asset.baseDir);
final Uri relativeUri = _fileSystem.path.toUri(relativePath);
final Uri entryUri = asset.symbolicPrefixUri == null
? relativeUri
: asset.symbolicPrefixUri.resolveUri(relativeUri);
variants.add(
_Asset(
baseDir: asset.baseDir,
entryUri: entryUri,
relativeUri: relativeUri,
package: attributedPackage,
),
);
}
result[asset] = variants;
}
_Asset _resolveAsset(
PackageConfig packageConfig,
String assetsBaseDir,
Uri assetUri,
String packageName,
Package attributedPackage,
) {
final String assetPath = _fileSystem.path.fromUri(assetUri);
if (assetUri.pathSegments.first == 'packages'
&& !_fileSystem.isFileSync(_fileSystem.path.join(assetsBaseDir, assetPath))) {
// The asset is referenced in the pubspec.yaml as
// 'packages/PACKAGE_NAME/PATH/TO/ASSET .
final _Asset packageAsset = _resolvePackageAsset(
assetUri,
packageConfig,
attributedPackage,
);
if (packageAsset != null) {
return packageAsset;
}
}
return _Asset(
baseDir: assetsBaseDir,
entryUri: packageName == null
? assetUri // Asset from the current application.
: Uri(pathSegments: <String>['packages', packageName, ...assetUri.pathSegments]), // Asset from, and declared in $packageName.
relativeUri: assetUri,
package: attributedPackage,
);
}
_Asset _resolvePackageAsset(Uri assetUri, PackageConfig packageConfig, Package attributedPackage) {
assert(assetUri.pathSegments.first == 'packages');
if (assetUri.pathSegments.length > 1) {
final String packageName = assetUri.pathSegments[1];
final Package package = packageConfig[packageName];
final Uri packageUri = package?.packageUriRoot;
if (packageUri != null && packageUri.scheme == 'file') {
return _Asset(
baseDir: _fileSystem.path.fromUri(packageUri),
entryUri: assetUri,
relativeUri: Uri(pathSegments: assetUri.pathSegments.sublist(2)),
package: attributedPackage,
);
}
}
_logger.printStatus('Error detected in pubspec.yaml:', emphasis: true);
_logger.printError('Could not resolve package for asset $assetUri.\n');
if (attributedPackage != null) {
_logger.printError('This asset was included from package ${attributedPackage.name}');
}
return null;
}
}
@immutable
class _Asset {
const _Asset({
this.baseDir,
this.relativeUri,
this.entryUri,
@required this.package,
});
final String baseDir;
final Package package;
/// A platform-independent URL where this asset can be found on disk on the
/// host system relative to [baseDir].
final Uri relativeUri;
/// A platform-independent URL representing the entry for the asset manifest.
final Uri entryUri;
File lookupAssetFile(FileSystem fileSystem) {
return fileSystem.file(fileSystem.path.join(baseDir, fileSystem.path.fromUri(relativeUri)));
}
/// The delta between what the entryUri is and the relativeUri (e.g.,
/// packages/flutter_gallery).
Uri get symbolicPrefixUri {
if (entryUri == relativeUri) {
return null;
}
final int index = entryUri.path.indexOf(relativeUri.path);
return index == -1 ? null : Uri(path: entryUri.path.substring(0, index));
}
@override
String toString() => 'asset: $entryUri';
@override
bool operator ==(Object other) {
if (identical(other, this)) {
return true;
}
if (other.runtimeType != runtimeType) {
return false;
}
return other is _Asset
&& other.baseDir == baseDir
&& other.relativeUri == relativeUri
&& other.entryUri == entryUri;
}
@override
int get hashCode {
return baseDir.hashCode
^ relativeUri.hashCode
^ entryUri.hashCode;
}
}
// Given an assets directory like this:
//
// assets/foo
// assets/var1/foo
// assets/var2/foo
// assets/bar
//
// variantsFor('assets/foo') => ['/assets/var1/foo', '/assets/var2/foo']
// variantsFor('assets/bar') => []
class _AssetDirectoryCache {
_AssetDirectoryCache(Iterable<String> excluded, this._fileSystem)
: _excluded = excluded
.map<String>(_fileSystem.path.absolute)
.toList();
final FileSystem _fileSystem;
final List<String> _excluded;
final Map<String, Map<String, List<String>>> _cache = <String, Map<String, List<String>>>{};
List<String> variantsFor(String assetPath) {
final String assetName = _fileSystem.path.basename(assetPath);
final String directory = _fileSystem.path.dirname(assetPath);
if (!_fileSystem.directory(directory).existsSync()) {
return const <String>[];
}
if (_cache[directory] == null) {
final List<String> paths = <String>[];
for (final FileSystemEntity entity in _fileSystem.directory(directory).listSync(recursive: true)) {
final String path = entity.path;
if (_fileSystem.isFileSync(path)
&& assetPath != path
&& !_excluded.any((String exclude) => _fileSystem.path.isWithin(exclude, path))) {
paths.add(path);
}
}
final Map<String, List<String>> variants = <String, List<String>>{};
for (final String path in paths) {
final String variantName = _fileSystem.path.basename(path);
if (directory == _fileSystem.path.dirname(path)) {
continue;
}
variants[variantName] ??= <String>[];
variants[variantName].add(path);
}
_cache[directory] = variants;
}
return _cache[directory][assetName] ?? const <String>[];
}
}