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ModuleScopePlugin.js
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Wed, Feb 5, 01:51

ModuleScopePlugin.js
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/**
* Copyright (c) 2015-present, Facebook, Inc.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*/
'use strict';
const chalk = require('chalk');
const path = require('path');
const os = require('os');
class ModuleScopePlugin {
constructor(appSrc, allowedFiles = []) {
this.appSrcs = Array.isArray(appSrc) ? appSrc : [appSrc];
this.allowedFiles = new Set(allowedFiles);
this.allowedPaths = [...allowedFiles].map(path.dirname).filter(p => path.relative(p, process.cwd()) !== '');
}
apply(resolver) {
const { appSrcs } = this;
resolver.hooks.file.tapAsync(
'ModuleScopePlugin',
(request, contextResolver, callback) => {
// Unknown issuer, probably webpack internals
if (!request.context.issuer) {
return callback();
}
if (
// If this resolves to a node_module, we don't care what happens next
request.descriptionFileRoot.indexOf('/node_modules/') !== -1 ||
request.descriptionFileRoot.indexOf('\\node_modules\\') !== -1 ||
// Make sure this request was manual
!request.__innerRequest_request
) {
return callback();
}
// Resolve the issuer from our appSrc and make sure it's one of our files
// Maybe an indexOf === 0 would be better?
if (
appSrcs.every(appSrc => {
const relative = path.relative(appSrc, request.context.issuer);
// If it's not in one of our app src or a subdirectory, not our request!
return relative.startsWith('../') || relative.startsWith('..\\');
})
) {
return callback();
}
const requestFullPath = path.resolve(
path.dirname(request.context.issuer),
request.__innerRequest_request
);
if (this.allowedFiles.has(requestFullPath)) {
return callback();
}
if (this.allowedPaths.some((allowedFile) => {
return requestFullPath.startsWith(allowedFile);
})) {
return callback();
}
// Find path from src to the requested file
// Error if in a parent directory of all given appSrcs
if (
appSrcs.every(appSrc => {
const requestRelative = path.relative(appSrc, requestFullPath);
return (
requestRelative.startsWith('../') ||
requestRelative.startsWith('..\\')
);
})
) {
const scopeError = new Error(
`You attempted to import ${chalk.cyan(
request.__innerRequest_request
)} which falls outside of the project ${chalk.cyan(
'src/'
)} directory. ` +
`Relative imports outside of ${chalk.cyan(
'src/'
)} are not supported.` +
os.EOL +
`You can either move it inside ${chalk.cyan(
'src/'
)}, or add a symlink to it from project's ${chalk.cyan(
'node_modules/'
)}.`
);
Object.defineProperty(scopeError, '__module_scope_plugin', {
value: true,
writable: false,
enumerable: false,
});
callback(scopeError, request);
} else {
callback();
}
}
);
}
}
module.exports = ModuleScopePlugin;

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