72 lines
2.4 KiB
TypeScript
72 lines
2.4 KiB
TypeScript
import { TSESTree } from "@typescript-eslint/experimental-utils";
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import { createRule } from "./utils";
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type MessageId = "simpleIndentError";
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type Options = any;
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export = createRule<Options, MessageId>({
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name: "simple-indent",
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meta: {
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docs: {
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description: "Enforce consistent indentation",
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category: "Stylistic Issues",
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recommended: "error",
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},
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messages: {
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simpleIndentError: "4 space indentation expected",
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},
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fixable: "whitespace",
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schema: [],
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type: "layout",
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},
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defaultOptions: [],
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create(context) {
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const TAB_SIZE = 4;
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const TAB_REGEX = /\t/g;
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const sourceCode = context.getSourceCode();
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const linebreaks = sourceCode.getText().match(/\r\n|[\r\n\u2028\u2029]/gu);
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const checkIndent = (node: TSESTree.Program) => {
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const lines = sourceCode.getLines();
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const linesLen = lines.length;
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let totalLen = 0;
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for (let i = 0; i < linesLen; i++) {
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const lineNumber = i + 1;
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const line = lines[i];
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const linebreaksLen = linebreaks && linebreaks[i] ? linebreaks[i].length : 1;
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const lineLen = line.length + linebreaksLen;
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const matches = /\S/.exec(line);
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if (matches && matches.index) {
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const indentEnd = matches.index;
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const whitespace = line.slice(0, indentEnd);
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if (!TAB_REGEX.test(whitespace)) {
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totalLen += lineLen;
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continue;
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}
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context.report({
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messageId: "simpleIndentError",
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node,
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loc: { column: indentEnd, line: lineNumber },
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fix(fixer) {
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const rangeStart = totalLen;
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const rangeEnd = rangeStart + indentEnd;
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return fixer
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.replaceTextRange([rangeStart, rangeEnd], whitespace.replace(TAB_REGEX, " ".repeat(TAB_SIZE)));
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}
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});
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}
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totalLen += lineLen;
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}
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};
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return {
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Program: checkIndent,
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};
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},
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});
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