mirror of https://github.com/status-im/metro.git
packager: ResolutionRequest.js: _loadAsDir and _loadAsFile sync
Reviewed By: davidaurelio Differential Revision: D4754090 fbshipit-source-id: 84ad1d988bf097d3094d90f3738ce64cc523879c
This commit is contained in:
Jean Lauliac
Facebook Github Bot
parent
9bd757822e
commit
25c82f2e8c
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@ -51,6 +51,22 @@ type Options = {
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preferNativePlatform: boolean,
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};
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/**
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* It may not be a great pattern to leverage exception just for "trying" things
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* out, notably for performance. We should consider replacing these functions
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* to be nullable-returning, or being better stucture to the algorithm.
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*/
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function tryResolveSync<T>(action: () => T, secondaryAction: () => T): T {
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try {
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return action();
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} catch (error) {
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if (error.type !== 'UnableToResolveError') {
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throw error;
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}
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return secondaryAction();
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}
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}
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class ResolutionRequest {
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_dirExists: DirExistsFn;
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_entryPath: string;
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@ -268,7 +284,7 @@ class ResolutionRequest {
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package_.root,
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path.relative(packageName, realModuleName)
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);
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return this._tryResolve(
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return tryResolveSync(
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() => this._loadAsFile(
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potentialModulePath,
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fromModule,
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@ -310,7 +326,7 @@ class ResolutionRequest {
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);
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}
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return this._tryResolve(
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return tryResolveSync(
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() => this._loadAsFile(realModuleName, fromModule, toModuleName),
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() => this._loadAsDir(realModuleName, fromModule, toModuleName)
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);
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@ -371,9 +387,13 @@ class ResolutionRequest {
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p = this._tryResolve(
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() => this._tryResolve(
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() => p,
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() => this._loadAsFile(potentialModulePath, fromModule, toModuleName),
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() => Promise.resolve().then(
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() => this._loadAsFile(potentialModulePath, fromModule, toModuleName),
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),
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),
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() => Promise.resolve().then(
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() => this._loadAsDir(potentialModulePath, fromModule, toModuleName),
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),
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() => this._loadAsDir(potentialModulePath, fromModule, toModuleName)
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);
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});
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@ -398,91 +418,87 @@ class ResolutionRequest {
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}
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}
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_loadAsFile(potentialModulePath: string, fromModule: Module, toModule: string): Promise<Module> {
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return Promise.resolve().then(() => {
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if (this._helpers.isAssetFile(potentialModulePath)) {
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let dirname = path.dirname(potentialModulePath);
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if (!this._dirExists(dirname)) {
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throw new UnableToResolveError(
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fromModule,
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toModule,
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`Directory ${dirname} doesn't exist`,
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);
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}
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const {name, type} = getAssetDataFromName(potentialModulePath, this._platforms);
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let pattern = name + '(@[\\d\\.]+x)?';
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if (this._platform != null) {
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pattern += '(\\.' + this._platform + ')?';
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}
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pattern += '\\.' + type;
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// Escape backslashes in the path to be able to use it in the regex
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if (path.sep === '\\') {
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dirname = dirname.replace(/\\/g, '\\\\');
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}
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// We arbitrarly grab the first one, because scale selection
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// will happen somewhere
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const [assetFile] = this._hasteFS.matchFiles(
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new RegExp(dirname + '(\/|\\\\)' + pattern)
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);
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if (assetFile) {
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return this._moduleCache.getAssetModule(assetFile);
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}
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}
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let file;
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if (this._hasteFS.exists(potentialModulePath)) {
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file = potentialModulePath;
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} else if (this._platform != null &&
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this._hasteFS.exists(potentialModulePath + '.' + this._platform + '.js')) {
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file = potentialModulePath + '.' + this._platform + '.js';
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} else if (this._preferNativePlatform &&
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this._hasteFS.exists(potentialModulePath + '.native.js')) {
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file = potentialModulePath + '.native.js';
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} else if (this._hasteFS.exists(potentialModulePath + '.js')) {
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file = potentialModulePath + '.js';
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} else if (this._hasteFS.exists(potentialModulePath + '.json')) {
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file = potentialModulePath + '.json';
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} else {
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_loadAsFile(potentialModulePath: string, fromModule: Module, toModule: string): Module {
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if (this._helpers.isAssetFile(potentialModulePath)) {
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let dirname = path.dirname(potentialModulePath);
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if (!this._dirExists(dirname)) {
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throw new UnableToResolveError(
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fromModule,
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toModule,
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`File ${potentialModulePath} doesn't exist`,
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`Directory ${dirname} doesn't exist`,
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);
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}
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return this._moduleCache.getModule(file);
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});
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}
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const {name, type} = getAssetDataFromName(potentialModulePath, this._platforms);
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_loadAsDir(potentialDirPath: string, fromModule: Module, toModule: string) {
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return Promise.resolve().then(() => {
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if (!this._dirExists(potentialDirPath)) {
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throw new UnableToResolveError(
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fromModule,
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toModule,
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`Directory ${potentialDirPath} doesn't exist`,
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);
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let pattern = name + '(@[\\d\\.]+x)?';
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if (this._platform != null) {
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pattern += '(\\.' + this._platform + ')?';
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}
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pattern += '\\.' + type;
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// Escape backslashes in the path to be able to use it in the regex
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if (path.sep === '\\') {
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dirname = dirname.replace(/\\/g, '\\\\');
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}
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const packageJsonPath = path.join(potentialDirPath, 'package.json');
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if (this._hasteFS.exists(packageJsonPath)) {
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const main = this._moduleCache.getPackage(packageJsonPath).getMain();
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return this._tryResolve(
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() => this._loadAsFile(main, fromModule, toModule),
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() => this._loadAsDir(main, fromModule, toModule),
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);
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// We arbitrarly grab the first one, because scale selection
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// will happen somewhere
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const [assetFile] = this._hasteFS.matchFiles(
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new RegExp(dirname + '(\/|\\\\)' + pattern)
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);
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if (assetFile) {
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return this._moduleCache.getAssetModule(assetFile);
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}
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}
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return this._loadAsFile(
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path.join(potentialDirPath, 'index'),
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let file;
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if (this._hasteFS.exists(potentialModulePath)) {
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file = potentialModulePath;
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} else if (this._platform != null &&
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this._hasteFS.exists(potentialModulePath + '.' + this._platform + '.js')) {
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file = potentialModulePath + '.' + this._platform + '.js';
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} else if (this._preferNativePlatform &&
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this._hasteFS.exists(potentialModulePath + '.native.js')) {
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file = potentialModulePath + '.native.js';
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} else if (this._hasteFS.exists(potentialModulePath + '.js')) {
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file = potentialModulePath + '.js';
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} else if (this._hasteFS.exists(potentialModulePath + '.json')) {
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file = potentialModulePath + '.json';
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} else {
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throw new UnableToResolveError(
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fromModule,
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toModule,
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`File ${potentialModulePath} doesn't exist`,
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);
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});
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}
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return this._moduleCache.getModule(file);
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}
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_loadAsDir(potentialDirPath: string, fromModule: Module, toModule: string): Module {
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if (!this._dirExists(potentialDirPath)) {
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throw new UnableToResolveError(
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fromModule,
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toModule,
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`Directory ${potentialDirPath} doesn't exist`,
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);
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}
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const packageJsonPath = path.join(potentialDirPath, 'package.json');
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if (this._hasteFS.exists(packageJsonPath)) {
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const main = this._moduleCache.getPackage(packageJsonPath).getMain();
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return tryResolveSync(
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() => this._loadAsFile(main, fromModule, toModule),
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() => this._loadAsDir(main, fromModule, toModule),
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);
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}
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return this._loadAsFile(
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path.join(potentialDirPath, 'index'),
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fromModule,
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toModule,
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);
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}
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_resetResolutionCache() {
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