forked from webpack/webpack
-
Notifications
You must be signed in to change notification settings - Fork 1
/
ExternalModuleFactoryPlugin.js
254 lines (240 loc) · 7.05 KB
/
ExternalModuleFactoryPlugin.js
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
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
/*
MIT License https://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
const util = require("util");
const ExternalModule = require("./ExternalModule");
const { resolveByProperty, cachedSetProperty } = require("./util/cleverMerge");
/** @typedef {import("../declarations/WebpackOptions").Externals} Externals */
/** @typedef {import("./NormalModuleFactory")} NormalModuleFactory */
const UNSPECIFIED_EXTERNAL_TYPE_REGEXP = /^[a-z0-9-]+ /;
const EMPTY_RESOLVE_OPTIONS = {};
// TODO webpack 6 remove this
const callDeprecatedExternals = util.deprecate(
(externalsFunction, context, request, cb) => {
externalsFunction.call(null, context, request, cb);
},
"The externals-function should be defined like ({context, request}, cb) => { ... }",
"DEP_WEBPACK_EXTERNALS_FUNCTION_PARAMETERS"
);
const cache = new WeakMap();
const resolveLayer = (obj, layer) => {
let map = cache.get(obj);
if (map === undefined) {
map = new Map();
cache.set(obj, map);
} else {
const cacheEntry = map.get(layer);
if (cacheEntry !== undefined) return cacheEntry;
}
const result = resolveByProperty(obj, "byLayer", layer);
map.set(layer, result);
return result;
};
class ExternalModuleFactoryPlugin {
/**
* @param {string | undefined} type default external type
* @param {Externals} externals externals config
*/
constructor(type, externals) {
this.type = type;
this.externals = externals;
}
/**
* @param {NormalModuleFactory} normalModuleFactory the normal module factory
* @returns {void}
*/
apply(normalModuleFactory) {
const globalType = this.type;
normalModuleFactory.hooks.factorize.tapAsync(
"ExternalModuleFactoryPlugin",
(data, callback) => {
const context = data.context;
const contextInfo = data.contextInfo;
const dependency = data.dependencies[0];
const dependencyType = data.dependencyType;
/**
* @param {string|string[]|boolean|Record<string, string|string[]>} value the external config
* @param {string|undefined} type type of external
* @param {function(Error=, ExternalModule=): void} callback callback
* @returns {void}
*/
const handleExternal = (value, type, callback) => {
if (value === false) {
// Not externals, fallback to original factory
return callback();
}
/** @type {string | string[] | Record<string, string|string[]>} */
let externalConfig;
if (value === true) {
externalConfig = dependency.request;
} else {
externalConfig = value;
}
// When no explicit type is specified, extract it from the externalConfig
if (type === undefined) {
if (
typeof externalConfig === "string" &&
UNSPECIFIED_EXTERNAL_TYPE_REGEXP.test(externalConfig)
) {
const idx = externalConfig.indexOf(" ");
type = externalConfig.slice(0, idx);
externalConfig = externalConfig.slice(idx + 1);
} else if (
Array.isArray(externalConfig) &&
externalConfig.length > 0 &&
UNSPECIFIED_EXTERNAL_TYPE_REGEXP.test(externalConfig[0])
) {
const firstItem = externalConfig[0];
const idx = firstItem.indexOf(" ");
type = firstItem.slice(0, idx);
externalConfig = [
firstItem.slice(idx + 1),
...externalConfig.slice(1)
];
}
}
callback(
null,
new ExternalModule(
externalConfig,
type || globalType,
dependency.request
)
);
};
/**
* @param {Externals} externals externals config
* @param {function((Error | null)=, ExternalModule=): void} callback callback
* @returns {void}
*/
const handleExternals = (externals, callback) => {
if (typeof externals === "string") {
if (externals === dependency.request) {
return handleExternal(dependency.request, undefined, callback);
}
} else if (Array.isArray(externals)) {
let i = 0;
const next = () => {
let asyncFlag;
const handleExternalsAndCallback = (err, module) => {
if (err) return callback(err);
if (!module) {
if (asyncFlag) {
asyncFlag = false;
return;
}
return next();
}
callback(null, module);
};
do {
asyncFlag = true;
if (i >= externals.length) return callback();
handleExternals(externals[i++], handleExternalsAndCallback);
} while (!asyncFlag);
asyncFlag = false;
};
next();
return;
} else if (externals instanceof RegExp) {
if (externals.test(dependency.request)) {
return handleExternal(dependency.request, undefined, callback);
}
} else if (typeof externals === "function") {
const cb = (err, value, type) => {
if (err) return callback(err);
if (value !== undefined) {
handleExternal(value, type, callback);
} else {
callback();
}
};
if (externals.length === 3) {
// TODO webpack 6 remove this
callDeprecatedExternals(
externals,
context,
dependency.request,
cb
);
} else {
const promise = externals(
{
context,
request: dependency.request,
dependencyType,
contextInfo,
getResolve: options => (context, request, callback) => {
const resolveContext = {
fileDependencies: data.fileDependencies,
missingDependencies: data.missingDependencies,
contextDependencies: data.contextDependencies
};
let resolver = normalModuleFactory.getResolver(
"normal",
dependencyType
? cachedSetProperty(
data.resolveOptions || EMPTY_RESOLVE_OPTIONS,
"dependencyType",
dependencyType
)
: data.resolveOptions
);
if (options) resolver = resolver.withOptions(options);
if (callback) {
resolver.resolve(
{},
context,
request,
resolveContext,
callback
);
} else {
return new Promise((resolve, reject) => {
resolver.resolve(
{},
context,
request,
resolveContext,
(err, result) => {
if (err) reject(err);
else resolve(result);
}
);
});
}
}
},
cb
);
if (promise && promise.then) promise.then(r => cb(null, r), cb);
}
return;
} else if (typeof externals === "object") {
const resolvedExternals = resolveLayer(
externals,
contextInfo.issuerLayer
);
if (
Object.prototype.hasOwnProperty.call(
resolvedExternals,
dependency.request
)
) {
return handleExternal(
resolvedExternals[dependency.request],
undefined,
callback
);
}
}
callback();
};
handleExternals(this.externals, callback);
}
);
}
}
module.exports = ExternalModuleFactoryPlugin;