68 lines
2.7 KiB
TypeScript
68 lines
2.7 KiB
TypeScript
// @module: commonjs
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// @includebuiltfile: typescript_standalone.d.ts
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// @noImplicitAny:true
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// @strictNullChecks:true
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/*
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* Note: This test is a public API sample. The sample sources can be found
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at: https://github.com/Microsoft/TypeScript/wiki/Using-the-Compiler-API#traversing-the-ast-with-a-little-linter
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* Please log a "breaking change" issue for any API breaking change affecting this issue
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*/
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declare var process: any;
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declare var console: any;
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declare var readFileSync: any;
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import * as ts from "typescript";
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export function delint(sourceFile: ts.SourceFile) {
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delintNode(sourceFile);
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function delintNode(node: ts.Node) {
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switch (node.kind) {
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case ts.SyntaxKind.ForStatement:
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case ts.SyntaxKind.ForInStatement:
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case ts.SyntaxKind.WhileStatement:
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case ts.SyntaxKind.DoStatement:
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if ((<ts.IterationStatement>node).statement.kind !== ts.SyntaxKind.Block) {
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report(node, "A looping statement's contents should be wrapped in a block body.");
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}
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break;
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case ts.SyntaxKind.IfStatement:
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let ifStatement = (<ts.IfStatement>node);
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if (ifStatement.thenStatement.kind !== ts.SyntaxKind.Block) {
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report(ifStatement.thenStatement, "An if statement's contents should be wrapped in a block body.");
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}
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if (ifStatement.elseStatement &&
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ifStatement.elseStatement.kind !== ts.SyntaxKind.Block &&
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ifStatement.elseStatement.kind !== ts.SyntaxKind.IfStatement) {
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report(ifStatement.elseStatement, "An else statement's contents should be wrapped in a block body.");
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}
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break;
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case ts.SyntaxKind.BinaryExpression:
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let op = (<ts.BinaryExpression>node).operatorToken.kind;
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if (op === ts.SyntaxKind.EqualsEqualsToken || op == ts.SyntaxKind.ExclamationEqualsToken) {
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report(node, "Use '===' and '!=='.")
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}
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break;
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}
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ts.forEachChild(node, delintNode);
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}
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function report(node: ts.Node, message: string) {
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let { line, character } = sourceFile.getLineAndCharacterOfPosition(node.getStart());
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console.log(`${sourceFile.fileName} (${line + 1},${character + 1}): ${message}`);
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}
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}
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const fileNames: string[] = process.argv.slice(2);
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fileNames.forEach(fileName => {
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// Parse a file
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let sourceFile = ts.createSourceFile(fileName, readFileSync(fileName).toString(), ts.ScriptTarget.ES2015, /*setParentNodes */ true);
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// delint it
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delint(sourceFile);
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}); |