init

马宇豪

2024-07-16 f591c27b57e2418c9495bc02ae8cfff84d35bc18

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
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
/*
    MIT License http://www.opensource.org/licenses/mit-license.php
    Author Tobias Koppers @sokra
*/
 
"use strict";
 
const {
    JAVASCRIPT_MODULE_TYPE_AUTO,
    JAVASCRIPT_MODULE_TYPE_DYNAMIC,
    JAVASCRIPT_MODULE_TYPE_ESM
} = require("./ModuleTypeConstants");
const ConstDependency = require("./dependencies/ConstDependency");
const ProvidedDependency = require("./dependencies/ProvidedDependency");
const { approve } = require("./javascript/JavascriptParserHelpers");
 
/** @typedef {import("./Compiler")} Compiler */
 
const PLUGIN_NAME = "ProvidePlugin";
 
class ProvidePlugin {
    /**
     * @param {Record<string, string | string[]>} definitions the provided identifiers
     */
    constructor(definitions) {
        this.definitions = definitions;
    }
 
    /**
     * Apply the plugin
     * @param {Compiler} compiler the compiler instance
     * @returns {void}
     */
    apply(compiler) {
        const definitions = this.definitions;
        compiler.hooks.compilation.tap(
            PLUGIN_NAME,
            (compilation, { normalModuleFactory }) => {
                compilation.dependencyTemplates.set(
                    ConstDependency,
                    new ConstDependency.Template()
                );
                compilation.dependencyFactories.set(
                    ProvidedDependency,
                    normalModuleFactory
                );
                compilation.dependencyTemplates.set(
                    ProvidedDependency,
                    new ProvidedDependency.Template()
                );
                const handler = (parser, parserOptions) => {
                    Object.keys(definitions).forEach(name => {
                        const request = [].concat(definitions[name]);
                        const splittedName = name.split(".");
                        if (splittedName.length > 0) {
                            splittedName.slice(1).forEach((_, i) => {
                                const name = splittedName.slice(0, i + 1).join(".");
                                parser.hooks.canRename.for(name).tap(PLUGIN_NAME, approve);
                            });
                        }
 
                        parser.hooks.expression.for(name).tap(PLUGIN_NAME, expr => {
                            const nameIdentifier = name.includes(".")
                                ? `__webpack_provided_${name.replace(/\./g, "_dot_")}`
                                : name;
                            const dep = new ProvidedDependency(
                                request[0],
                                nameIdentifier,
                                request.slice(1),
                                expr.range
                            );
                            dep.loc = expr.loc;
                            parser.state.module.addDependency(dep);
                            return true;
                        });
 
                        parser.hooks.call.for(name).tap(PLUGIN_NAME, expr => {
                            const nameIdentifier = name.includes(".")
                                ? `__webpack_provided_${name.replace(/\./g, "_dot_")}`
                                : name;
                            const dep = new ProvidedDependency(
                                request[0],
                                nameIdentifier,
                                request.slice(1),
                                expr.callee.range
                            );
                            dep.loc = expr.callee.loc;
                            parser.state.module.addDependency(dep);
                            parser.walkExpressions(expr.arguments);
                            return true;
                        });
                    });
                };
                normalModuleFactory.hooks.parser
                    .for(JAVASCRIPT_MODULE_TYPE_AUTO)
                    .tap(PLUGIN_NAME, handler);
                normalModuleFactory.hooks.parser
                    .for(JAVASCRIPT_MODULE_TYPE_DYNAMIC)
                    .tap(PLUGIN_NAME, handler);
                normalModuleFactory.hooks.parser
                    .for(JAVASCRIPT_MODULE_TYPE_ESM)
                    .tap(PLUGIN_NAME, handler);
            }
        );
    }
}
 
module.exports = ProvidePlugin;