BannerPlugin.js
1.35 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
const ConcatSource = require("webpack-sources").ConcatSource;
const ModuleFilenameHelpers = require("./ModuleFilenameHelpers");
function wrapComment(str) {
if(!str.includes("\n")) return `/*! ${str} */`;
return `/*!\n * ${str.split("\n").join("\n * ")}\n */`;
}
class BannerPlugin {
constructor(options) {
if(arguments.length > 1)
throw new Error("BannerPlugin only takes one argument (pass an options object)");
if(typeof options === "string")
options = {
banner: options
};
this.options = options || {};
this.banner = this.options.raw ? options.banner : wrapComment(options.banner);
}
apply(compiler) {
let options = this.options;
let banner = this.banner;
compiler.plugin("compilation", (compilation) => {
compilation.plugin("optimize-chunk-assets", (chunks, callback) => {
chunks.forEach((chunk) => {
if(options.entryOnly && !chunk.isInitial()) return;
chunk.files
.filter(ModuleFilenameHelpers.matchObject.bind(undefined, options))
.forEach((file) =>
compilation.assets[file] = new ConcatSource(
banner, "\n", compilation.assets[file]
)
);
});
callback();
});
});
}
}
module.exports = BannerPlugin;