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123 lines
4.1 KiB
JavaScript
123 lines
4.1 KiB
JavaScript
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/**
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* @fileoverview Rule to enforce the position of line comments
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* @author Alberto Rodríguez
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*/
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"use strict";
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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: "layout",
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docs: {
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description: "enforce position of line comments",
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category: "Stylistic Issues",
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recommended: false,
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url: "https://eslint.org/docs/rules/line-comment-position"
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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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enum: ["above", "beside"]
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},
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{
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type: "object",
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properties: {
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position: {
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enum: ["above", "beside"]
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},
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ignorePattern: {
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type: "string"
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},
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applyDefaultPatterns: {
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type: "boolean"
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},
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applyDefaultIgnorePatterns: {
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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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above: "Expected comment to be above code.",
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beside: "Expected comment to be beside code."
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}
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},
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create(context) {
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const options = context.options[0];
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let above,
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ignorePattern,
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applyDefaultIgnorePatterns = true;
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if (!options || typeof options === "string") {
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above = !options || options === "above";
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} else {
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above = !options.position || options.position === "above";
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ignorePattern = options.ignorePattern;
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if (Object.prototype.hasOwnProperty.call(options, "applyDefaultIgnorePatterns")) {
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applyDefaultIgnorePatterns = options.applyDefaultIgnorePatterns;
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} else {
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applyDefaultIgnorePatterns = options.applyDefaultPatterns !== false;
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}
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}
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const defaultIgnoreRegExp = astUtils.COMMENTS_IGNORE_PATTERN;
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const fallThroughRegExp = /^\s*falls?\s?through/u;
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const customIgnoreRegExp = new RegExp(ignorePattern, "u");
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const sourceCode = context.getSourceCode();
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//--------------------------------------------------------------------------
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// Public
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//--------------------------------------------------------------------------
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return {
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Program() {
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const comments = sourceCode.getAllComments();
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comments.filter(token => token.type === "Line").forEach(node => {
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if (applyDefaultIgnorePatterns && (defaultIgnoreRegExp.test(node.value) || fallThroughRegExp.test(node.value))) {
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return;
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}
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if (ignorePattern && customIgnoreRegExp.test(node.value)) {
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return;
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}
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const previous = sourceCode.getTokenBefore(node, { includeComments: true });
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const isOnSameLine = previous && previous.loc.end.line === node.loc.start.line;
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if (above) {
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if (isOnSameLine) {
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context.report({
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node,
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messageId: "above"
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});
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}
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} else {
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if (!isOnSameLine) {
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context.report({
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node,
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messageId: "beside"
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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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};
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