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plugin.js
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plugin.js
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/*
Copyright (C) 2017 Kagucho <kagucho.net@gmail.com>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published
by the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
const SingleEntryPlugin = require("webpack/lib/SingleEntryPlugin");
const name = require("fs").realpathSync(__dirname);
module.exports = function() {
let children = {};
this.plugin("compilation", compilation => {
compilation.plugin("normal-module-loader", loader => {
loader[name] = (context, request) => {
if (!children[context]) {
children[context] = {};
}
if (!children[context][request]) {
children[context][request] = new Promise((resolve, reject) => {
const compiler = compilation.createChildCompiler(request, {
filename: "entry.js",
});
compiler.context = context;
compiler.apply(new SingleEntryPlugin(
context, "!!" + request, "entry"));
compiler.apply.apply(compiler, compiler.options.plugins);
compiler.compile((error, compilation) => {
if (error) {
return reject(error);
}
const assets = {};
for (const key in compilation.assets) {
assets[key] = {
extracted: false,
value: compilation.assets[key],
};
}
resolve({compilation, assets});
});
});
}
return children[context][request];
};
});
});
this.plugin("emit", (compilation, sync) => Promise.all((function *() {
for (const context in children) {
for (const request in children[context]) {
yield children[context][request].then(result => {
for (const asset in result.assets) {
if (!result.assets[asset].extracted) {
compilation.assets[asset] = result.assets[asset].value;
}
}
});
}
}
children = {};
}())).then(value => sync(null, value), error => sync(error)));
}