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code-server/build/lib/eslint/code-layering.ts

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/*---------------------------------------------------------------------------------------------
* Copyright (c) Microsoft Corporation. All rights reserved.
* Licensed under the MIT License. See License.txt in the project root for license information.
*--------------------------------------------------------------------------------------------*/
import * as eslint from 'eslint';
import { join, dirname } from 'path';
import { createImportRuleListener } from './utils';
type Config = {
allowed: Set<string>;
disallowed: Set<string>;
};
export = new class implements eslint.Rule.RuleModule {
readonly meta: eslint.Rule.RuleMetaData = {
messages: {
layerbreaker: 'Bad layering. You are not allowed to access {{from}} from here, allowed layers are: [{{allowed}}]'
},
docs: {
url: 'https://github.com/microsoft/vscode/wiki/Source-Code-Organization'
}
};
create(context: eslint.Rule.RuleContext): eslint.Rule.RuleListener {
const fileDirname = dirname(context.getFilename());
const parts = fileDirname.split(/\\|\//);
const ruleArgs = <Record<string, string[]>>context.options[0];
let config: Config | undefined;
for (let i = parts.length - 1; i >= 0; i--) {
if (ruleArgs[parts[i]]) {
config = {
allowed: new Set(ruleArgs[parts[i]]).add(parts[i]),
disallowed: new Set()
};
Object.keys(ruleArgs).forEach(key => {
if (!config!.allowed.has(key)) {
config!.disallowed.add(key);
}
});
break;
}
}
if (!config) {
// nothing
return {};
}
return createImportRuleListener((node, path) => {
if (path[0] === '.') {
path = join(dirname(context.getFilename()), path);
}
const parts = dirname(path).split(/\\|\//);
for (let i = parts.length - 1; i >= 0; i--) {
const part = parts[i];
if (config!.allowed.has(part)) {
// GOOD - same layer
break;
}
if (config!.disallowed.has(part)) {
// BAD - wrong layer
context.report({
loc: node.loc,
messageId: 'layerbreaker',
data: {
from: part,
allowed: [...config!.allowed.keys()].join(', ')
}
});
break;
}
}
});
}
};