138 lines
6.1 KiB
Plaintext
138 lines
6.1 KiB
Plaintext
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"use strict";
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var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
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if (k2 === undefined) k2 = k;
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var desc = Object.getOwnPropertyDescriptor(m, k);
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if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
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desc = { enumerable: true, get: function() { return m[k]; } };
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}
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Object.defineProperty(o, k2, desc);
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}) : (function(o, m, k, k2) {
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if (k2 === undefined) k2 = k;
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o[k2] = m[k];
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}));
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var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
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Object.defineProperty(o, "default", { enumerable: true, value: v });
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}) : function(o, v) {
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o["default"] = v;
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});
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var __importStar = (this && this.__importStar) || function (mod) {
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if (mod && mod.__esModule) return mod;
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var result = {};
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if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
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__setModuleDefault(result, mod);
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return result;
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};
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Object.defineProperty(exports, "__esModule", { value: true });
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const utils_1 = require("@typescript-eslint/utils");
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const ts = __importStar(require("typescript"));
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const util_1 = require("../util");
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exports.default = (0, util_1.createRule)({
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name: 'no-useless-template-literals',
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meta: {
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fixable: 'code',
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type: 'suggestion',
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docs: {
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description: 'Disallow unnecessary template literals',
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recommended: 'strict',
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requiresTypeChecking: true,
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},
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messages: {
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noUselessTemplateLiteral: 'Template literal expression is unnecessary and can be simplified.',
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},
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schema: [],
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},
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defaultOptions: [],
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create(context) {
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const services = (0, util_1.getParserServices)(context);
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function isUnderlyingTypeString(expression) {
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const type = (0, util_1.getConstrainedTypeAtLocation)(services, expression);
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const isString = (t) => {
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return (0, util_1.isTypeFlagSet)(t, ts.TypeFlags.StringLike);
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};
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if (type.isUnion()) {
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return type.types.every(isString);
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}
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if (type.isIntersection()) {
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return type.types.some(isString);
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}
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return isString(type);
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}
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function isLiteral(expression) {
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return expression.type === utils_1.AST_NODE_TYPES.Literal;
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}
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function isInfinityIdentifier(expression) {
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return (expression.type === utils_1.AST_NODE_TYPES.Identifier &&
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expression.name === 'Infinity');
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}
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function isNaNIdentifier(expression) {
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return (expression.type === utils_1.AST_NODE_TYPES.Identifier &&
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expression.name === 'NaN');
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}
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return {
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TemplateLiteral(node) {
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if (node.parent.type === utils_1.AST_NODE_TYPES.TaggedTemplateExpression) {
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return;
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}
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const hasSingleStringVariable = node.quasis.length === 2 &&
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node.quasis[0].value.raw === '' &&
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node.quasis[1].value.raw === '' &&
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node.expressions.length === 1 &&
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isUnderlyingTypeString(node.expressions[0]);
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if (hasSingleStringVariable) {
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context.report({
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node: node.expressions[0],
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messageId: 'noUselessTemplateLiteral',
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fix(fixer) {
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const [prevQuasi, nextQuasi] = node.quasis;
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// Remove the quasis and backticks.
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return [
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fixer.removeRange([
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prevQuasi.range[1] - 3,
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node.expressions[0].range[0],
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]),
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fixer.removeRange([
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node.expressions[0].range[1],
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nextQuasi.range[0] + 2,
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]),
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];
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},
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});
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return;
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}
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const fixableExpressions = node.expressions.filter((expression) => isLiteral(expression) ||
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(0, util_1.isUndefinedIdentifier)(expression) ||
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isInfinityIdentifier(expression) ||
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isNaNIdentifier(expression));
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fixableExpressions.forEach(expression => {
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context.report({
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node: expression,
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messageId: 'noUselessTemplateLiteral',
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fix(fixer) {
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const index = node.expressions.indexOf(expression);
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const prevQuasi = node.quasis[index];
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const nextQuasi = node.quasis[index + 1];
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// Remove the quasis' parts that are related to the current expression.
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const fixes = [
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fixer.removeRange([
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prevQuasi.range[1] - 2,
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expression.range[0],
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]),
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fixer.removeRange([
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expression.range[1],
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nextQuasi.range[0] + 1,
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]),
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];
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const stringValue = (0, util_1.getStaticStringValue)(expression);
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if (stringValue != null) {
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const escapedValue = stringValue.replace(/([`$\\])/g, '\\$1');
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fixes.push(fixer.replaceText(expression, escapedValue));
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}
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return fixes;
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},
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});
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});
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},
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};
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},
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});
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//# sourceMappingURL=no-useless-template-literals.js.map
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