forked from mariusbalcytis/extract-file-loader
/
Plugin.js
53 lines (39 loc) · 1.35 KB
/
Plugin.js
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'use strict'
class ExtractFilePlugin {
apply(compiler) {
compiler.plugin('this-compilation', (compilation) => {
compilation.plugin('normal-module-loader', (loaderContext, module) => {
loaderContext[__dirname] = () => {
module.meta[__dirname] = true;
};
});
compilation.plugin('additional-assets', callback => {
compilation.chunks.forEach(chunk => {
chunk.forEachModule(module => processModule(chunk, module));
});
callback();
});
});
}
}
function processModule(chunk, ourModule) {
if (ourModule.meta && ourModule.meta[__dirname]) {
let moduleFound = false;
// let's find module, which was issued by ours (proxied module)
chunk.forEachModule((module) => {
if (!moduleFound && module.reasons.some(reason => reason.module === ourModule)) {
// add assets from that module
addAssets(chunk, module);
// break cycle
moduleFound = true;
}
});
}
}
function addAssets(chunk, module) {
// add any emitted assets via proxied module to this chunk
for (let file in module.assets) {
chunk.files.push(file);
}
}
module.exports = ExtractFilePlugin;