597 lines
22 KiB
JavaScript
597 lines
22 KiB
JavaScript
/*
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* Package Configuration Extension
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*
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* Example:
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*
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* SystemJS.packages = {
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* jquery: {
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* main: 'index.js', // when not set, package name is requested directly
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* format: 'amd',
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* defaultExtension: 'ts', // defaults to 'js', can be set to false
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* modules: {
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* '*.ts': {
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* loader: 'typescript'
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* },
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* 'vendor/sizzle.js': {
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* format: 'global'
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* }
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* },
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* map: {
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* // map internal require('sizzle') to local require('./vendor/sizzle')
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* sizzle: './vendor/sizzle.js',
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* // map any internal or external require of 'jquery/vendor/another' to 'another/index.js'
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* './vendor/another.js': './another/index.js',
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* // test.js / test -> lib/test.js
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* './test.js': './lib/test.js',
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*
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* // environment-specific map configurations
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* './index.js': {
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* '~browser': './index-node.js',
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* './custom-condition.js|~export': './index-custom.js'
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* }
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* },
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* // allows for setting package-prefixed depCache
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* // keys are normalized module names relative to the package itself
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* depCache: {
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* // import 'package/index.js' loads in parallel package/lib/test.js,package/vendor/sizzle.js
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* './index.js': ['./test'],
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* './test.js': ['external-dep'],
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* 'external-dep/path.js': ['./another.js']
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* }
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* }
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* };
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*
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* Then:
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* import 'jquery' -> jquery/index.js
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* import 'jquery/submodule' -> jquery/submodule.js
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* import 'jquery/submodule.ts' -> jquery/submodule.ts loaded as typescript
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* import 'jquery/vendor/another' -> another/index.js
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*
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* Detailed Behaviours
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* - main can have a leading "./" can be added optionally
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* - map and defaultExtension are applied to the main
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* - defaultExtension adds the extension only if the exact extension is not present
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* - defaultJSExtensions applies after map when defaultExtension is not set
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* - if a meta value is available for a module, map and defaultExtension are skipped
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* - like global map, package map also applies to subpaths (sizzle/x, ./vendor/another/sub)
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* - condition module map is '@env' module in package or '@system-env' globally
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* - map targets support conditional interpolation ('./x': './x.#{|env}.js')
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* - internal package map targets cannot use boolean conditionals
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*
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* Package Configuration Loading
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*
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* Not all packages may already have their configuration present in the System config
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* For these cases, a list of packageConfigPaths can be provided, which when matched against
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* a request, will first request a ".json" file by the package name to derive the package
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* configuration from. This allows dynamic loading of non-predetermined code, a key use
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* case in SystemJS.
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*
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* Example:
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*
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* SystemJS.packageConfigPaths = ['packages/test/package.json', 'packages/*.json'];
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*
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* // will first request 'packages/new-package/package.json' for the package config
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* // before completing the package request to 'packages/new-package/path'
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* SystemJS.import('packages/new-package/path');
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*
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* // will first request 'packages/test/package.json' before the main
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* SystemJS.import('packages/test');
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*
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* When a package matches packageConfigPaths, it will always send a config request for
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* the package configuration.
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* The package name itself is taken to be the match up to and including the last wildcard
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* or trailing slash.
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* The most specific package config path will be used.
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* Any existing package configurations for the package will deeply merge with the
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* package config, with the existing package configurations taking preference.
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* To opt-out of the package configuration request for a package that matches
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* packageConfigPaths, use the { configured: true } package config option.
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*
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*/
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(function() {
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hookConstructor(function(constructor) {
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return function() {
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constructor.call(this);
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this.packages = {};
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this.packageConfigPaths = [];
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};
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});
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function getPackage(loader, normalized) {
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// use most specific package
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var curPkg, curPkgLen = 0, pkgLen;
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for (var p in loader.packages) {
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if (normalized.substr(0, p.length) === p && (normalized.length === p.length || normalized[p.length] === '/')) {
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pkgLen = p.split('/').length;
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if (pkgLen > curPkgLen) {
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curPkg = p;
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curPkgLen = pkgLen;
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}
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}
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}
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return curPkg;
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}
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function addDefaultExtension(loader, pkg, pkgName, subPath, skipExtensions) {
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// don't apply extensions to folders or if defaultExtension = false
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if (!subPath || subPath[subPath.length - 1] == '/' || skipExtensions || pkg.defaultExtension === false)
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return subPath;
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var metaMatch = false;
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// exact meta or meta with any content after the last wildcard skips extension
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if (pkg.meta)
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getMetaMatches(pkg.meta, subPath, function(metaPattern, matchMeta, matchDepth) {
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if (matchDepth == 0 || metaPattern.lastIndexOf('*') != metaPattern.length - 1)
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return metaMatch = true;
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});
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// exact global meta or meta with any content after the last wildcard skips extension
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if (!metaMatch && loader.meta)
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getMetaMatches(loader.meta, pkgName + '/' + subPath, function(metaPattern, matchMeta, matchDepth) {
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if (matchDepth == 0 || metaPattern.lastIndexOf('*') != metaPattern.length - 1)
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return metaMatch = true;
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});
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if (metaMatch)
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return subPath;
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// work out what the defaultExtension is and add if not there already
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// NB reconsider if default should really be ".js"?
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var defaultExtension = '.' + (pkg.defaultExtension || 'js');
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if (subPath.substr(subPath.length - defaultExtension.length) != defaultExtension)
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return subPath + defaultExtension;
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else
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return subPath;
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}
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function applyPackageConfigSync(loader, pkg, pkgName, subPath, skipExtensions) {
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// main
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if (!subPath) {
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if (pkg.main)
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subPath = pkg.main.substr(0, 2) == './' ? pkg.main.substr(2) : pkg.main;
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// also no submap if name is package itself (import 'pkg' -> 'path/to/pkg.js')
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else
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// NB can add a default package main convention here when defaultJSExtensions is deprecated
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// if it becomes internal to the package then it would no longer be an exit path
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return pkgName + (loader.defaultJSExtensions ? '.js' : '');
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}
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// map config checking without then with extensions
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if (pkg.map) {
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var mapPath = './' + subPath;
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var mapMatch = getMapMatch(pkg.map, mapPath);
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// we then check map with the default extension adding
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if (!mapMatch) {
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mapPath = './' + addDefaultExtension(loader, pkg, pkgName, subPath, skipExtensions);
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if (mapPath != './' + subPath)
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mapMatch = getMapMatch(pkg.map, mapPath);
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}
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if (mapMatch) {
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var mapped = doMapSync(loader, pkg, pkgName, mapMatch, mapPath, skipExtensions);
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if (mapped)
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return mapped;
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}
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}
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// normal package resolution
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return pkgName + '/' + addDefaultExtension(loader, pkg, pkgName, subPath, skipExtensions);
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}
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function validMapping(mapMatch, mapped, pkgName, path) {
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// disallow internal to subpath maps
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if (mapMatch == '.')
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throw new Error('Package ' + pkgName + ' has a map entry for "." which is not permitted.');
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// allow internal ./x -> ./x/y or ./x/ -> ./x/y recursive maps
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// but only if the path is exactly ./x and not ./x/z
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if (mapped.substr(0, mapMatch.length) == mapMatch && path.length > mapMatch.length)
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return false;
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return true;
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}
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function doMapSync(loader, pkg, pkgName, mapMatch, path, skipExtensions) {
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if (path[path.length - 1] == '/')
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path = path.substr(0, path.length - 1);
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var mapped = pkg.map[mapMatch];
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if (typeof mapped == 'object')
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throw new Error('Synchronous conditional normalization not supported sync normalizing ' + mapMatch + ' in ' + pkgName);
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if (!validMapping(mapMatch, mapped, pkgName, path) || typeof mapped != 'string')
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return;
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// package map to main / base-level
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if (mapped == '.')
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mapped = pkgName;
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// internal package map
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else if (mapped.substr(0, 2) == './')
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return pkgName + '/' + addDefaultExtension(loader, pkg, pkgName, mapped.substr(2) + path.substr(mapMatch.length), skipExtensions);
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// external map reference
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return loader.normalizeSync(mapped + path.substr(mapMatch.length), pkgName + '/');
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}
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function applyPackageConfig(loader, pkg, pkgName, subPath, skipExtensions) {
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// main
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if (!subPath) {
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if (pkg.main)
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subPath = pkg.main.substr(0, 2) == './' ? pkg.main.substr(2) : pkg.main;
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// also no submap if name is package itself (import 'pkg' -> 'path/to/pkg.js')
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else
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// NB can add a default package main convention here when defaultJSExtensions is deprecated
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// if it becomes internal to the package then it would no longer be an exit path
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return Promise.resolve(pkgName + (loader.defaultJSExtensions ? '.js' : ''));
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}
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// map config checking without then with extensions
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var mapPath, mapMatch;
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if (pkg.map) {
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mapPath = './' + subPath;
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mapMatch = getMapMatch(pkg.map, mapPath);
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// we then check map with the default extension adding
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if (!mapMatch) {
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mapPath = './' + addDefaultExtension(loader, pkg, pkgName, subPath, skipExtensions);
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if (mapPath != './' + subPath)
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mapMatch = getMapMatch(pkg.map, mapPath);
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}
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}
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return (mapMatch ? doMap(loader, pkg, pkgName, mapMatch, mapPath, skipExtensions) : Promise.resolve())
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.then(function(mapped) {
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if (mapped)
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return Promise.resolve(mapped);
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// normal package resolution / fallback resolution for no conditional match
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return Promise.resolve(pkgName + '/' + addDefaultExtension(loader, pkg, pkgName, subPath, skipExtensions));
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});
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}
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function doStringMap(loader, pkg, pkgName, mapMatch, mapped, path, skipExtensions) {
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// NB the interpolation cases should strictly skip subsequent interpolation
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// package map to main / base-level
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if (mapped == '.')
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mapped = pkgName;
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// internal package map
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else if (mapped.substr(0, 2) == './')
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return Promise.resolve(pkgName + '/' + addDefaultExtension(loader, pkg, pkgName, mapped.substr(2) + path.substr(mapMatch.length), skipExtensions))
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.then(function(name) {
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return interpolateConditional.call(loader, name, pkgName + '/');
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});
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// external map reference
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return loader.normalize(mapped + path.substr(mapMatch.length), pkgName + '/');
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}
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function doMap(loader, pkg, pkgName, mapMatch, path, skipExtensions) {
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if (path[path.length - 1] == '/')
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path = path.substr(0, path.length - 1);
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var mapped = pkg.map[mapMatch];
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if (typeof mapped == 'string') {
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if (!validMapping(mapMatch, mapped, pkgName, path))
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return Promise.resolve();
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return doStringMap(loader, pkg, pkgName, mapMatch, mapped, path, skipExtensions);
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}
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// we use a special conditional syntax to allow the builder to handle conditional branch points further
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if (loader.builder)
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return Promise.resolve(pkgName + '/#:' + path);
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// we load all conditions upfront
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var conditionPromises = [];
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var conditions = [];
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for (var e in mapped) {
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var c = parseCondition(e);
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conditions.push({
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condition: c,
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map: mapped[e]
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});
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conditionPromises.push(loader['import'](c.module, pkgName));
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}
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// map object -> conditional map
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return Promise.all(conditionPromises)
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.then(function(conditionValues) {
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// first map condition to match is used
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for (var i = 0; i < conditions.length; i++) {
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var c = conditions[i].condition;
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var value = readMemberExpression(c.prop, conditionValues[i]);
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if (!c.negate && value || c.negate && !value)
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return conditions[i].map;
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}
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})
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.then(function(mapped) {
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if (mapped) {
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if (!validMapping(mapMatch, mapped, pkgName, path))
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return;
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return doStringMap(loader, pkg, pkgName, mapMatch, mapped, path, skipExtensions);
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}
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// no environment match -> fallback to original subPath by returning undefined
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});
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}
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// normalizeSync = decanonicalize + package resolution
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SystemJSLoader.prototype.normalizeSync = SystemJSLoader.prototype.decanonicalize = SystemJSLoader.prototype.normalize;
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// decanonicalize must JUST handle package defaultExtension: false case when defaultJSExtensions is set
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// to be deprecated!
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hook('decanonicalize', function(decanonicalize) {
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return function(name, parentName) {
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if (this.builder)
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return decanonicalize.call(this, name, parentName, true);
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var decanonicalized = decanonicalize.call(this, name, parentName, false);
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if (!this.defaultJSExtensions)
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return decanonicalized;
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var pkgName = getPackage(this, decanonicalized);
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var pkg = this.packages[pkgName];
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var defaultExtension = pkg && pkg.defaultExtension;
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if (defaultExtension == undefined && pkg && pkg.meta)
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getMetaMatches(pkg.meta, decanonicalized.substr(pkgName), function(metaPattern, matchMeta, matchDepth) {
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if (matchDepth == 0 || metaPattern.lastIndexOf('*') != metaPattern.length - 1) {
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defaultExtension = false;
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return true;
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}
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});
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if ((defaultExtension === false || defaultExtension && defaultExtension != '.js') && name.substr(name.length - 3, 3) != '.js' && decanonicalized.substr(decanonicalized.length - 3, 3) == '.js')
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decanonicalized = decanonicalized.substr(0, decanonicalized.length - 3);
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return decanonicalized;
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};
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});
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hook('normalizeSync', function(normalizeSync) {
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return function(name, parentName, isPlugin) {
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var loader = this;
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isPlugin = isPlugin === true;
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// apply contextual package map first
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// (we assume the parent package config has already been loaded)
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if (parentName)
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var parentPackageName = getPackage(loader, parentName) ||
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loader.defaultJSExtensions && parentName.substr(parentName.length - 3, 3) == '.js' &&
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getPackage(loader, parentName.substr(0, parentName.length - 3));
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var parentPackage = parentPackageName && loader.packages[parentPackageName];
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// ignore . since internal maps handled by standard package resolution
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if (parentPackage && name[0] != '.') {
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var parentMap = parentPackage.map;
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var parentMapMatch = parentMap && getMapMatch(parentMap, name);
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if (parentMapMatch && typeof parentMap[parentMapMatch] == 'string') {
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var mapped = doMapSync(loader, parentPackage, parentPackageName, parentMapMatch, name, isPlugin);
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if (mapped)
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return mapped;
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}
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}
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var defaultJSExtension = loader.defaultJSExtensions && name.substr(name.length - 3, 3) != '.js';
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// apply map, core, paths, contextual package map
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var normalized = normalizeSync.call(loader, name, parentName, false);
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// undo defaultJSExtension
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if (defaultJSExtension && normalized.substr(normalized.length - 3, 3) != '.js')
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defaultJSExtension = false;
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if (defaultJSExtension)
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normalized = normalized.substr(0, normalized.length - 3);
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var pkgConfigMatch = getPackageConfigMatch(loader, normalized);
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var pkgName = pkgConfigMatch && pkgConfigMatch.packageName || getPackage(loader, normalized);
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if (!pkgName)
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return normalized + (defaultJSExtension ? '.js' : '');
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var subPath = normalized.substr(pkgName.length + 1);
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return applyPackageConfigSync(loader, loader.packages[pkgName] || {}, pkgName, subPath, isPlugin);
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};
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});
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hook('normalize', function(normalize) {
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return function(name, parentName, isPlugin) {
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var loader = this;
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isPlugin = isPlugin === true;
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return Promise.resolve()
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.then(function() {
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// apply contextual package map first
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// (we assume the parent package config has already been loaded)
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if (parentName)
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var parentPackageName = getPackage(loader, parentName) ||
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loader.defaultJSExtensions && parentName.substr(parentName.length - 3, 3) == '.js' &&
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getPackage(loader, parentName.substr(0, parentName.length - 3));
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var parentPackage = parentPackageName && loader.packages[parentPackageName];
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// ignore . since internal maps handled by standard package resolution
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if (parentPackage && name.substr(0, 2) != './') {
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var parentMap = parentPackage.map;
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var parentMapMatch = parentMap && getMapMatch(parentMap, name);
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if (parentMapMatch)
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return doMap(loader, parentPackage, parentPackageName, parentMapMatch, name, isPlugin);
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}
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return Promise.resolve();
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})
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.then(function(mapped) {
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if (mapped)
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return mapped;
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var defaultJSExtension = loader.defaultJSExtensions && name.substr(name.length - 3, 3) != '.js';
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// apply map, core, paths, contextual package map
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var normalized = normalize.call(loader, name, parentName, false);
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// undo defaultJSExtension
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if (defaultJSExtension && normalized.substr(normalized.length - 3, 3) != '.js')
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defaultJSExtension = false;
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if (defaultJSExtension)
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normalized = normalized.substr(0, normalized.length - 3);
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var pkgConfigMatch = getPackageConfigMatch(loader, normalized);
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var pkgName = pkgConfigMatch && pkgConfigMatch.packageName || getPackage(loader, normalized);
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if (!pkgName)
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return Promise.resolve(normalized + (defaultJSExtension ? '.js' : ''));
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var pkg = loader.packages[pkgName];
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// if package is already configured or not a dynamic config package, use existing package config
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var isConfigured = pkg && (pkg.configured || !pkgConfigMatch);
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return (isConfigured ? Promise.resolve(pkg) : loadPackageConfigPath(loader, pkgName, pkgConfigMatch.configPath))
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.then(function(pkg) {
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var subPath = normalized.substr(pkgName.length + 1);
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return applyPackageConfig(loader, pkg, pkgName, subPath, isPlugin);
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});
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});
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};
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});
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// check if the given normalized name matches a packageConfigPath
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// if so, loads the config
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var packageConfigPaths = {};
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// data object for quick checks against package paths
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function createPkgConfigPathObj(path) {
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var lastWildcard = path.lastIndexOf('*');
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var length = Math.max(lastWildcard + 1, path.lastIndexOf('/'));
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return {
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length: length,
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regEx: new RegExp('^(' + path.substr(0, length).replace(/[.+?^${}()|[\]\\]/g, '\\$&').replace(/\*/g, '[^\\/]+') + ')(\\/|$)'),
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wildcard: lastWildcard != -1
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};
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|
}
|
|
|
|
// most specific match wins
|
|
function getPackageConfigMatch(loader, normalized) {
|
|
var pkgName, exactMatch = false, configPath;
|
|
for (var i = 0; i < loader.packageConfigPaths.length; i++) {
|
|
var packageConfigPath = loader.packageConfigPaths[i];
|
|
var p = packageConfigPaths[packageConfigPath] || (packageConfigPaths[packageConfigPath] = createPkgConfigPathObj(packageConfigPath));
|
|
if (normalized.length < p.length)
|
|
continue;
|
|
var match = normalized.match(p.regEx);
|
|
if (match && (!pkgName || (!(exactMatch && p.wildcard) && pkgName.length < match[1].length))) {
|
|
pkgName = match[1];
|
|
exactMatch = !p.wildcard;
|
|
configPath = pkgName + packageConfigPath.substr(p.length);
|
|
}
|
|
}
|
|
|
|
if (!pkgName)
|
|
return;
|
|
|
|
return {
|
|
packageName: pkgName,
|
|
configPath: configPath
|
|
};
|
|
}
|
|
|
|
function loadPackageConfigPath(loader, pkgName, pkgConfigPath) {
|
|
var configLoader = loader.pluginLoader || loader;
|
|
|
|
// NB remove this when json is default
|
|
(configLoader.meta[pkgConfigPath] = configLoader.meta[pkgConfigPath] || {}).format = 'json';
|
|
configLoader.meta[pkgConfigPath].loader = null;
|
|
|
|
return configLoader.load(pkgConfigPath)
|
|
.then(function() {
|
|
var cfg = configLoader.get(pkgConfigPath)['default'];
|
|
|
|
// support "systemjs" prefixing
|
|
if (cfg.systemjs)
|
|
cfg = cfg.systemjs;
|
|
|
|
// modules backwards compatibility
|
|
if (cfg.modules) {
|
|
cfg.meta = cfg.modules;
|
|
warn.call(loader, 'Package config file ' + pkgConfigPath + ' is configured with "modules", which is deprecated as it has been renamed to "meta".');
|
|
}
|
|
|
|
return setPkgConfig(loader, pkgName, cfg, true);
|
|
});
|
|
}
|
|
|
|
function getMetaMatches(pkgMeta, subPath, matchFn) {
|
|
// wildcard meta
|
|
var meta = {};
|
|
var wildcardIndex;
|
|
for (var module in pkgMeta) {
|
|
// allow meta to start with ./ for flexibility
|
|
var dotRel = module.substr(0, 2) == './' ? './' : '';
|
|
if (dotRel)
|
|
module = module.substr(2);
|
|
|
|
wildcardIndex = module.indexOf('*');
|
|
if (wildcardIndex === -1)
|
|
continue;
|
|
|
|
if (module.substr(0, wildcardIndex) == subPath.substr(0, wildcardIndex)
|
|
&& module.substr(wildcardIndex + 1) == subPath.substr(subPath.length - module.length + wildcardIndex + 1)) {
|
|
// alow match function to return true for an exit path
|
|
if (matchFn(module, pkgMeta[dotRel + module], module.split('/').length))
|
|
return;
|
|
}
|
|
}
|
|
// exact meta
|
|
var exactMeta = pkgMeta[subPath] && pkgMeta.hasOwnProperty && pkgMeta.hasOwnProperty(subPath) ? pkgMeta[subPath] : pkgMeta['./' + subPath];
|
|
if (exactMeta)
|
|
matchFn(exactMeta, exactMeta, 0);
|
|
}
|
|
|
|
hook('locate', function(locate) {
|
|
return function(load) {
|
|
var loader = this;
|
|
return Promise.resolve(locate.call(this, load))
|
|
.then(function(address) {
|
|
var pkgName = getPackage(loader, load.name);
|
|
if (pkgName) {
|
|
var pkg = loader.packages[pkgName];
|
|
var subPath = load.name.substr(pkgName.length + 1);
|
|
|
|
var meta = {};
|
|
if (pkg.meta) {
|
|
var bestDepth = 0;
|
|
|
|
// NB support a main shorthand in meta here?
|
|
getMetaMatches(pkg.meta, subPath, function(metaPattern, matchMeta, matchDepth) {
|
|
if (matchDepth > bestDepth)
|
|
bestDepth = matchDepth;
|
|
extendMeta(meta, matchMeta, matchDepth && bestDepth > matchDepth);
|
|
});
|
|
|
|
extendMeta(load.metadata, meta);
|
|
}
|
|
|
|
// format
|
|
if (pkg.format && !load.metadata.loader)
|
|
load.metadata.format = load.metadata.format || pkg.format;
|
|
}
|
|
|
|
return address;
|
|
});
|
|
};
|
|
});
|
|
|
|
})();
|