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index.js
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index.js
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var SourceMapConsumer = require("source-map").SourceMapConsumer;
var SourceMapSource = require("webpack-sources").SourceMapSource;
var RawSource = require("webpack-sources").RawSource;
var ModuleFilenameHelpers = require("webpack/lib/ModuleFilenameHelpers");
const name = "es3ify";
var transform = require(name).transform;
function Es3ifyPlugin(options) {
if (typeof options !== "object") options = {};
if (typeof options.compressor !== "undefined") {
options.compress = options.compressor;
}
this.options = options;
}
module.exports = Es3ifyPlugin;
Es3ifyPlugin.prototype.apply = function (compiler) {
var options = this.options;
options.test = options.test || /\.js($|\?)/i;
if (compiler.hooks) {
compiler.hooks.compilation.tap(name, function (compilation) {
if (options.sourceMap !== false) {
compilation.hooks.buildModule.tap(name, buildModuleHook);
}
compilation.hooks.optimizeChunkAssets.tapAsync(name, optimizeChunkAssetsHook(compilation));
});
} else {
compiler.plugin("compilation", function (compilation) {
if (options.sourceMap !== false) {
compilation.plugin("build-module", buildModuleHook);
}
compilation.plugin("optimize-chunk-assets", optimizeChunkAssetsHook(compilation));
});
}
function buildModuleHook(module) {
// to get detailed location info about errors
module.useSourceMap = true;
}
function optimizeChunkAssetsHook(compilation) {
return function (chunks, callback) {
var files = [];
chunks.forEach(function (chunk) {
chunk.files.forEach(function (file) {
files.push(file);
});
});
compilation.additionalChunkAssets.forEach(function (file) {
files.push(file);
});
files = files.filter(ModuleFilenameHelpers.matchObject.bind(undefined, options));
files.forEach(function (file) {
try {
var asset = compilation.assets[file];
var inputSourceMap, input;
if (options.sourceMap !== false) {
if (asset.sourceAndMap) {
var sourceAndMap = asset.sourceAndMap();
inputSourceMap = sourceAndMap.map;
input = sourceAndMap.source;
} else {
inputSourceMap = asset.map();
input = asset.source();
}
var sourceMap = new SourceMapConsumer(inputSourceMap);
} else {
input = asset.source();
}
var map;
if (options.sourceMap !== false) {
map = inputSourceMap;
}
var stream = transform(input);
compilation.assets[file] = (map ?
new SourceMapSource(stream, file, map, input, inputSourceMap) :
new RawSource(stream));
} catch (err) {
if (err.line) {
compilation.errors.push(new Error(file + " from es3ify\n" + err.message + " [" + file + ":" + err.line + "," + err.col + "]"));
} else if (err.msg) {
compilation.errors.push(new Error(file + " from es3ify\n" + err.msg));
} else
compilation.errors.push(new Error(file + " from es3ify\n" + err.stack));
}
});
callback();
}
}
};