1 |
|
2 |
|
3 |
|
4 |
|
5 | "use strict";
|
6 |
|
7 | const ParserHelpers = require("./ParserHelpers");
|
8 | const ConstDependency = require("./dependencies/ConstDependency");
|
9 |
|
10 | const NullFactory = require("./NullFactory");
|
11 |
|
12 | class ProvidePlugin {
|
13 | constructor(definitions) {
|
14 | this.definitions = definitions;
|
15 | }
|
16 |
|
17 | apply(compiler) {
|
18 | const definitions = this.definitions;
|
19 | compiler.hooks.compilation.tap(
|
20 | "ProvidePlugin",
|
21 | (compilation, { normalModuleFactory }) => {
|
22 | compilation.dependencyFactories.set(ConstDependency, new NullFactory());
|
23 | compilation.dependencyTemplates.set(
|
24 | ConstDependency,
|
25 | new ConstDependency.Template()
|
26 | );
|
27 | const handler = (parser, parserOptions) => {
|
28 | Object.keys(definitions).forEach(name => {
|
29 | var request = [].concat(definitions[name]);
|
30 | var splittedName = name.split(".");
|
31 | if (splittedName.length > 0) {
|
32 | splittedName.slice(1).forEach((_, i) => {
|
33 | const name = splittedName.slice(0, i + 1).join(".");
|
34 | parser.hooks.canRename
|
35 | .for(name)
|
36 | .tap("ProvidePlugin", ParserHelpers.approve);
|
37 | });
|
38 | }
|
39 | parser.hooks.expression.for(name).tap("ProvidePlugin", expr => {
|
40 | let nameIdentifier = name;
|
41 | const scopedName = name.includes(".");
|
42 | let expression = `require(${JSON.stringify(request[0])})`;
|
43 | if (scopedName) {
|
44 | nameIdentifier = `__webpack_provided_${name.replace(
|
45 | /\./g,
|
46 | "_dot_"
|
47 | )}`;
|
48 | }
|
49 | if (request.length > 1) {
|
50 | expression += request
|
51 | .slice(1)
|
52 | .map(r => `[${JSON.stringify(r)}]`)
|
53 | .join("");
|
54 | }
|
55 | if (
|
56 | !ParserHelpers.addParsedVariableToModule(
|
57 | parser,
|
58 | nameIdentifier,
|
59 | expression
|
60 | )
|
61 | ) {
|
62 | return false;
|
63 | }
|
64 | if (scopedName) {
|
65 | ParserHelpers.toConstantDependency(parser, nameIdentifier)(
|
66 | expr
|
67 | );
|
68 | }
|
69 | return true;
|
70 | });
|
71 | });
|
72 | };
|
73 | normalModuleFactory.hooks.parser
|
74 | .for("javascript/auto")
|
75 | .tap("ProvidePlugin", handler);
|
76 | normalModuleFactory.hooks.parser
|
77 | .for("javascript/dynamic")
|
78 | .tap("ProvidePlugin", handler);
|
79 |
|
80 |
|
81 | }
|
82 | );
|
83 | }
|
84 | }
|
85 | module.exports = ProvidePlugin;
|