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/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
const path = require("path");
const asyncLib = require("neo-async");
const SingleEntryDependency = require("./dependencies/SingleEntryDependency");
class LibManifestPlugin {
constructor(options) {
this.options = options;
}
apply(compiler) {
compiler.hooks.emit.tapAsync(
"LibManifestPlugin",
(compilation, callback) => {
asyncLib.forEach(
compilation.chunks,
(chunk, callback) => {
if (!chunk.isOnlyInitial()) {
callback();
return;
}
const targetPath = compilation.getPath(this.options.path, {
hash: compilation.hash,
chunk
});
const name =
this.options.name &&
compilation.getPath(this.options.name, {
hash: compilation.hash,
chunk
});
const manifest = {
name,
type: this.options.type,
content: Array.from(chunk.modulesIterable, module => {
if (
this.options.entryOnly &&
!module.reasons.some(
r => r.dependency instanceof SingleEntryDependency
)
) {
return;
}
if (module.libIdent) {
const ident = module.libIdent({
context: this.options.context || compiler.options.context
});
if (ident) {
return {
ident,
data: {
id: module.id,
buildMeta: module.buildMeta
}
};
}
}
})
.filter(Boolean)
.reduce((obj, item) => {
obj[item.ident] = item.data;
return obj;
}, Object.create(null))
};
// Apply formatting to content if format flag is true;
const manifestContent = this.options.format
? JSON.stringify(manifest, null, 2)
: JSON.stringify(manifest);
const content = Buffer.from(manifestContent, "utf8");
compiler.outputFileSystem.mkdirp(path.dirname(targetPath), err => {
if (err) return callback(err);
compiler.outputFileSystem.writeFile(
targetPath,
content,
callback
);
});
},
callback
);
}
);
}
}
module.exports = LibManifestPlugin;