149 lines
4.6 KiB
JavaScript
149 lines
4.6 KiB
JavaScript
/**
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* @fileoverview enforce a maximum file length
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* @author Alberto Rodríguez
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*/
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"use strict";
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//------------------------------------------------------------------------------
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// Requirements
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//------------------------------------------------------------------------------
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const lodash = require("lodash");
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const astUtils = require("./utils/ast-utils");
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//------------------------------------------------------------------------------
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// Rule Definition
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//------------------------------------------------------------------------------
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module.exports = {
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meta: {
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type: "suggestion",
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docs: {
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description: "enforce a maximum number of lines per file",
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category: "Stylistic Issues",
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recommended: false,
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url: "https://eslint.org/docs/rules/max-lines"
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},
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schema: [
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{
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oneOf: [
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{
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type: "integer",
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minimum: 0
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},
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{
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type: "object",
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properties: {
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max: {
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type: "integer",
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minimum: 0
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},
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skipComments: {
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type: "boolean"
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},
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skipBlankLines: {
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type: "boolean"
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}
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},
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additionalProperties: false
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}
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]
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}
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],
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messages: {
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exceed: "File has too many lines ({{actual}}). Maximum allowed is {{max}}."
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}
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},
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create(context) {
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const option = context.options[0];
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let max = 300;
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if (typeof option === "object" && Object.prototype.hasOwnProperty.call(option, "max")) {
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max = option.max;
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} else if (typeof option === "number") {
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max = option;
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}
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const skipComments = option && option.skipComments;
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const skipBlankLines = option && option.skipBlankLines;
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const sourceCode = context.getSourceCode();
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/**
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* Returns whether or not a token is a comment node type
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* @param {Token} token The token to check
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* @returns {boolean} True if the token is a comment node
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*/
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function isCommentNodeType(token) {
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return token && (token.type === "Block" || token.type === "Line");
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}
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/**
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* Returns the line numbers of a comment that don't have any code on the same line
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* @param {Node} comment The comment node to check
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* @returns {number[]} The line numbers
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*/
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function getLinesWithoutCode(comment) {
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let start = comment.loc.start.line;
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let end = comment.loc.end.line;
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let token;
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token = comment;
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do {
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token = sourceCode.getTokenBefore(token, { includeComments: true });
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} while (isCommentNodeType(token));
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if (token && astUtils.isTokenOnSameLine(token, comment)) {
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start += 1;
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}
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token = comment;
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do {
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token = sourceCode.getTokenAfter(token, { includeComments: true });
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} while (isCommentNodeType(token));
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if (token && astUtils.isTokenOnSameLine(comment, token)) {
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end -= 1;
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}
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if (start <= end) {
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return lodash.range(start, end + 1);
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}
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return [];
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}
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return {
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"Program:exit"() {
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let lines = sourceCode.lines.map((text, i) => ({ lineNumber: i + 1, text }));
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if (skipBlankLines) {
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lines = lines.filter(l => l.text.trim() !== "");
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}
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if (skipComments) {
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const comments = sourceCode.getAllComments();
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const commentLines = lodash.flatten(comments.map(comment => getLinesWithoutCode(comment)));
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lines = lines.filter(l => !lodash.includes(commentLines, l.lineNumber));
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}
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if (lines.length > max) {
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context.report({
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loc: { line: 1, column: 0 },
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messageId: "exceed",
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data: {
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max,
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actual: lines.length
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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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