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transform.js
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transform.js
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var makeGraph = require("../graph/make_graph"),
makeBundleFromModuleName = require("../graph/get"),
concatSource = require("../bundle/concat_source"),
mapDependencies = require("../graph/map_dependencies"),
logging = require('../logger'),
hasES6 = require('../graph/has_es6'),
_ = require('lodash'),
hasES6 = require("../graph/has_es6"),
addTraceurRuntime = require("../bundle/add_traceur_runtime"),
addGlobalShim = require("../bundle/add_global_shim"),
transpile = require('../graph/transpile'),
clean = require("../graph/clean"),
minify = require("../graph/minify"),
winston = require('winston'),
removeActiveSourceKeys = require("../graph/remove_active_source_keys"),
nameBundle = require("../bundle/name"),
makeConfiguration = require("../configuration/make"),
addSourceMapUrl = require("../bundle/add_source_map_url");
var transformImport = function(config, transformOptions){
transformOptions = _.assign(transformOptions || {}, {
useNormalizedDependencies: true
});
if(transformOptions.sourceMaps) {
_.assign(config, {
lessOptions: _.assign({}, transformOptions.lessOptions, {
sourceMap: {}
})
});
}
transformOptions.exports = transformOptions.exports || {};
// Setup logging
logging.setup(transformOptions, config);
return makeGraph(config, transformOptions).then(function(data){
return transformImport.normalizeExports(data.steal.System,
transformOptions)
.then(function(){
return data;
});
}).then(function(data){
var transform = function(moduleNames, options){
options = _.extend({
ignore: [],
minify: false,
removeDevelopmentCode: true,
format: "global",
noGlobalShim: false,
includeTraceurRuntime: true,
ignoreAllDependencies: false,
removeSourceNodes: true
},transformOptions, options);
var configuration = data.configuration =
makeConfiguration(data.loader, data.buildLoader, options);
if(!moduleNames) {
moduleNames = data.loader.main;
}
if(typeof moduleNames === "string"){
moduleNames = [moduleNames];
}
moduleNames.forEach(function(moduleName){
if(!data.graph[moduleName]){
throw new Error("Can't find module '" + moduleName + "' in graph.");
}
});
var nodesInBundle;
// get nodes
if(options.ignoreAllDependencies) {
nodesInBundle = moduleNames.map(function(moduleName){
return data.graph[moduleName];
});
} else {
// get all nodes that are dependencies of moduleName
var nodes = makeBundleFromModuleName(data.graph, moduleNames);
// figure ot what modules should be ignored
var ignores = transformImport.getAllIgnores(options.ignore, data.graph);
// get only the nodes that should be in the bundle.
nodesInBundle = transformImport.notIgnored(nodes, ignores);
}
// If there's nothing in this bundle, just give them an empty
// source object.
if(nodesInBundle.length === 0) {
return {code: ""};
}
// resets the active source to be worked from.
removeActiveSourceKeys(nodesInBundle, options);
// #### clean
// Clean first
if(options.removeDevelopmentCode) {
winston.debug('Cleaning...');
clean(nodesInBundle, options);
}
// Minify would make sense to do next as it is expensive. But it
// makes transpile hard to debug.
// #### transpile
winston.debug('Transpiling...');
options.sourceMapPath = configuration.bundlesPath;
transpile(nodesInBundle,
options.format === "global" ? "amd" : options.format,
options.format === "global" ? _.assign(_.clone(options),{namedDefines: true}) : options,
data);
// #### minify
if(options.minify) {
winston.debug('Minifying...');
minify(nodesInBundle);
}
var bundle = {
bundles: moduleNames,
nodes: nodesInBundle,
buildType: nodesInBundle[0].load.metadata.buildType || "js"
};
bundle.name = nameBundle.getName(bundle);
// add shim if global
if(options.format === "global" && !options.noGlobalShim) {
addGlobalShim(bundle, options);
}
if(hasES6(nodesInBundle) && options.includeTraceurRuntime){
addTraceurRuntime(bundle);
}
winston.debug('Output Modules:');
bundle.nodes.forEach(function(node) {
winston.debug("+ %s", node.load.name);
});
concatSource(bundle,"activeSource", options.format === "global");
if(options.sourceMaps) {
addSourceMapUrl(bundle);
}
return bundle.source;
};
// Set the graph on transform in case anyone needs to use it.
transform.graph = data.graph;
transform.loader = data.loader;
transform.data = data;
return transform;
});
};
var matches = function(rules, name, load){
if(rules === name) {
return true;
}else if( Array.isArray(rules) ) {
for(var i =0; i < rules.length; i++) {
if( matches(rules[i], name, load) ) {
return true;
}
}
} else if( rules instanceof RegExp) {
return rules.test(name);
} else if( typeof rules === "function") {
return rules(name, load);
}
};
transformImport.getAllIgnores = function(baseIgnores, graph) {
var ignores = [];
baseIgnores = Array.isArray(baseIgnores) ? baseIgnores : [ baseIgnores ];
baseIgnores.forEach(function(moduleName){
// An ignore could be a regular expression, this only applies to strings.
if(typeof moduleName === "string") {
// Add this ignore's dependencies
ignores = ignores.concat(mapDependencies(graph, moduleName, function(name){
return name;
}));
} else {
ignores.push(moduleName);
}
});
return ignores;
};
transformImport.notIgnored = function( bundle, rules ) {
var notIgnored = [];
bundle.filter(function(b) { return !!b; })
.forEach(function(node){
if( !matches(rules, node.load.name, node.load ) ) {
notIgnored.push(node);
}
});
return notIgnored;
};
transformImport.normalizeExports = function(loader, options) {
var exports = options.exports;
var main = loader.main;
var promises = Object.keys(exports).map(function(oldName){
return loader.normalize(oldName, main).then(function(name){
if(name !== oldName) {
exports[name] = exports[oldName];
delete exports[oldName];
}
});
});
return Promise.all(promises);
};
transformImport.matches = matches;
module.exports = transformImport;