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mohemmionic5/Mohem/node_modules_/tslint/lib/rules/noDuplicateImportsRule.js

72 lines
3.5 KiB
JavaScript

"use strict";
/**
* @license
* Copyright 2017 Palantir Technologies, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
Object.defineProperty(exports, "__esModule", { value: true });
var tslib_1 = require("tslib");
var tsutils_1 = require("tsutils");
var ts = require("typescript");
var Lint = require("../index");
var Rule = /** @class */ (function (_super) {
tslib_1.__extends(Rule, _super);
function Rule() {
return _super !== null && _super.apply(this, arguments) || this;
}
Rule.FAILURE_STRING = function (module) {
return "Multiple imports from '" + module + "' can be combined into one.";
};
Rule.prototype.apply = function (sourceFile) {
return this.applyWithFunction(sourceFile, walk);
};
/* tslint:disable:object-literal-sort-keys */
Rule.metadata = {
ruleName: "no-duplicate-imports",
description: Lint.Utils.dedent(templateObject_1 || (templateObject_1 = tslib_1.__makeTemplateObject(["\n Disallows multiple import statements from the same module."], ["\n Disallows multiple import statements from the same module."]))),
rationale: Lint.Utils.dedent(templateObject_2 || (templateObject_2 = tslib_1.__makeTemplateObject(["\n Using a single import statement per module will make the code clearer because you can see everything being imported\n from that module on one line."], ["\n Using a single import statement per module will make the code clearer because you can see everything being imported\n from that module on one line."]))),
optionsDescription: "Not configurable",
options: null,
optionExamples: [true],
type: "maintainability",
typescriptOnly: false,
};
return Rule;
}(Lint.Rules.AbstractRule));
exports.Rule = Rule;
function walk(ctx) {
walkWorker(ctx, ctx.sourceFile.statements, new Set());
}
function walkWorker(ctx, statements, seen) {
for (var _i = 0, statements_1 = statements; _i < statements_1.length; _i++) {
var statement = statements_1[_i];
if (tsutils_1.isImportDeclaration(statement) && tsutils_1.isLiteralExpression(statement.moduleSpecifier)) {
var text = statement.moduleSpecifier.text;
if (seen.has(text)) {
ctx.addFailureAtNode(statement, Rule.FAILURE_STRING(text));
}
seen.add(text);
}
if (tsutils_1.isModuleDeclaration(statement) &&
statement.body !== undefined &&
statement.name.kind === ts.SyntaxKind.StringLiteral) {
// If this is a module augmentation, re-use `seen` since those imports could be moved outside.
// If this is an ambient module, create a fresh `seen`
// because they should have separate imports to avoid becoming augmentations.
walkWorker(ctx, statement.body.statements, ts.isExternalModule(ctx.sourceFile) ? seen : new Set());
}
}
}
var templateObject_1, templateObject_2;