EvalSourceMapDevToolModuleTemplatePlugin.js
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/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
const RawSource = require("webpack-sources").RawSource;
const ModuleFilenameHelpers = require("./ModuleFilenameHelpers");
class EvalSourceMapDevToolModuleTemplatePlugin {
constructor(compilation, options) {
this.compilation = compilation;
this.sourceMapComment = options.append || "//# sourceURL=[module]\n//# sourceMappingURL=[url]";
this.moduleFilenameTemplate = options.moduleFilenameTemplate || "webpack:///[resource-path]?[hash]";
this.options = options;
}
apply(moduleTemplate) {
const self = this;
const options = this.options;
moduleTemplate.plugin("module", function(source, module) {
if(source.__EvalSourceMapDevToolData)
return source.__EvalSourceMapDevToolData;
let sourceMap;
let content;
if(source.sourceAndMap) {
const sourceAndMap = source.sourceAndMap(options);
sourceMap = sourceAndMap.map;
content = sourceAndMap.source;
} else {
sourceMap = source.map(options);
content = source.source();
}
if(!sourceMap) {
return source;
}
// Clone (flat) the sourcemap to ensure that the mutations below do not persist.
sourceMap = Object.keys(sourceMap).reduce(function(obj, key) {
obj[key] = sourceMap[key];
return obj;
}, {});
const modules = sourceMap.sources.map(function(source) {
const module = self.compilation.findModule(source);
return module || source;
});
let moduleFilenames = modules.map(function(module) {
return ModuleFilenameHelpers.createFilename(module, self.moduleFilenameTemplate, this.requestShortener);
}, this);
moduleFilenames = ModuleFilenameHelpers.replaceDuplicates(moduleFilenames, function(filename, i, n) {
for(let j = 0; j < n; j++)
filename += "*";
return filename;
});
sourceMap.sources = moduleFilenames;
if(sourceMap.sourcesContent) {
sourceMap.sourcesContent = sourceMap.sourcesContent.map(function(content, i) {
return typeof content === "string" ? `${content}\n\n\n${ModuleFilenameHelpers.createFooter(modules[i], this.requestShortener)}` : null;
}, this);
}
sourceMap.sourceRoot = options.sourceRoot || "";
sourceMap.file = `${module.id}.js`;
const footer = self.sourceMapComment.replace(/\[url\]/g, `data:application/json;charset=utf-8;base64,${new Buffer(JSON.stringify(sourceMap), "utf8").toString("base64")}`) + //eslint-disable-line
`\n//# sourceURL=webpack-internal:///${module.id}\n`; // workaround for chrome bug
source.__EvalSourceMapDevToolData = new RawSource(`eval(${JSON.stringify(content + footer)});`);
return source.__EvalSourceMapDevToolData;
});
moduleTemplate.plugin("hash", function(hash) {
hash.update("eval-source-map");
hash.update("2");
});
}
}
module.exports = EvalSourceMapDevToolModuleTemplatePlugin;