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4 years ago
/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
const { RawSource } = require("webpack-sources");
const ModuleFilenameHelpers = require("./ModuleFilenameHelpers");
const { absolutify } = require("./util/identifier");
const cache = new WeakMap();
class EvalSourceMapDevToolModuleTemplatePlugin {
constructor(compilation, options) {
this.compilation = compilation;
this.sourceMapComment =
options.append || "//# sourceURL=[module]\n//# sourceMappingURL=[url]";
this.moduleFilenameTemplate =
options.moduleFilenameTemplate ||
"webpack://[namespace]/[resource-path]?[hash]";
this.namespace = options.namespace || "";
this.options = options;
}
apply(moduleTemplate) {
const self = this;
const options = this.options;
const matchModule = ModuleFilenameHelpers.matchObject.bind(
ModuleFilenameHelpers,
options
);
moduleTemplate.hooks.module.tap(
"EvalSourceMapDevToolModuleTemplatePlugin",
(source, module) => {
const cachedSource = cache.get(source);
if (cachedSource !== undefined) {
return cachedSource;
}
if (!matchModule(module.resource)) {
return source;
}
/** @type {{ [key: string]: TODO; }} */
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((obj, key) => {
obj[key] = sourceMap[key];
return obj;
}, {});
const context = this.compilation.compiler.options.context;
const modules = sourceMap.sources.map(source => {
if (source.startsWith("webpack://")) {
source = absolutify(context, source.slice(10));
}
const module = self.compilation.findModule(source);
return module || source;
});
let moduleFilenames = modules.map(module => {
return ModuleFilenameHelpers.createFilename(
module,
{
moduleFilenameTemplate: self.moduleFilenameTemplate,
namespace: self.namespace
},
moduleTemplate.runtimeTemplate.requestShortener
);
});
moduleFilenames = ModuleFilenameHelpers.replaceDuplicates(
moduleFilenames,
(filename, i, n) => {
for (let j = 0; j < n; j++) filename += "*";
return filename;
}
);
sourceMap.sources = moduleFilenames;
sourceMap.sourceRoot = options.sourceRoot || "";
sourceMap.file = `${module.id}.js`;
const footer =
self.sourceMapComment.replace(
/\[url\]/g,
`data:application/json;charset=utf-8;base64,${Buffer.from(
JSON.stringify(sourceMap),
"utf8"
).toString("base64")}`
) + `\n//# sourceURL=webpack-internal:///${module.id}\n`; // workaround for chrome bug
const evalSource = new RawSource(
`eval(${JSON.stringify(content + footer)});`
);
cache.set(source, evalSource);
return evalSource;
}
);
moduleTemplate.hooks.hash.tap(
"EvalSourceMapDevToolModuleTemplatePlugin",
hash => {
hash.update("eval-source-map");
hash.update("2");
}
);
}
}
module.exports = EvalSourceMapDevToolModuleTemplatePlugin;