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							159 lines
						
					
					
						
							5.4 KiB
						
					
					
				/** | 
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 * @fileoverview Rule that warns about used warning comments | 
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 * @author Alexander Schmidt <https://github.com/lxanders> | 
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 */ | 
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 | 
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"use strict"; | 
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 | 
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const { escapeRegExp } = require("lodash"); | 
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const astUtils = require("./utils/ast-utils"); | 
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 | 
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//------------------------------------------------------------------------------ | 
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// Rule Definition | 
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//------------------------------------------------------------------------------ | 
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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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 | 
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        docs: { | 
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            description: "disallow specified warning terms in comments", | 
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            category: "Best Practices", | 
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            recommended: false, | 
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            url: "https://eslint.org/docs/rules/no-warning-comments" | 
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        }, | 
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 | 
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        schema: [ | 
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            { | 
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                type: "object", | 
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                properties: { | 
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                    terms: { | 
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                        type: "array", | 
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                        items: { | 
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                            type: "string" | 
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                        } | 
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                    }, | 
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                    location: { | 
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                        enum: ["start", "anywhere"] | 
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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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    create(context) { | 
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 | 
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        const sourceCode = context.getSourceCode(), | 
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            configuration = context.options[0] || {}, | 
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            warningTerms = configuration.terms || ["todo", "fixme", "xxx"], | 
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            location = configuration.location || "start", | 
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            selfConfigRegEx = /\bno-warning-comments\b/u; | 
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 | 
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        /** | 
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         * Convert a warning term into a RegExp which will match a comment containing that whole word in the specified | 
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         * location ("start" or "anywhere"). If the term starts or ends with non word characters, then the match will not | 
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         * require word boundaries on that side. | 
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         * @param {string} term A term to convert to a RegExp | 
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         * @returns {RegExp} The term converted to a RegExp | 
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         */ | 
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        function convertToRegExp(term) { | 
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            const escaped = escapeRegExp(term); | 
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            const wordBoundary = "\\b"; | 
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            const eitherOrWordBoundary = `|${wordBoundary}`; | 
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            let prefix; | 
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 | 
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            /* | 
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             * If the term ends in a word character (a-z0-9_), ensure a word | 
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             * boundary at the end, so that substrings do not get falsely | 
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             * matched. eg "todo" in a string such as "mastodon". | 
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             * If the term ends in a non-word character, then \b won't match on | 
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             * the boundary to the next non-word character, which would likely | 
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             * be a space. For example `/\bFIX!\b/.test('FIX! blah') === false`. | 
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             * In these cases, use no bounding match. Same applies for the | 
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             * prefix, handled below. | 
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             */ | 
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            const suffix = /\w$/u.test(term) ? "\\b" : ""; | 
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 | 
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            if (location === "start") { | 
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 | 
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                /* | 
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                 * When matching at the start, ignore leading whitespace, and | 
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                 * there's no need to worry about word boundaries. | 
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                 */ | 
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                prefix = "^\\s*"; | 
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            } else if (/^\w/u.test(term)) { | 
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                prefix = wordBoundary; | 
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            } else { | 
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                prefix = ""; | 
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            } | 
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 | 
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            if (location === "start") { | 
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 | 
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                /* | 
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                 * For location "start" the regex should be | 
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                 * ^\s*TERM\b.  This checks the word boundary | 
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                 * at the beginning of the comment. | 
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                 */ | 
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                return new RegExp(prefix + escaped + suffix, "iu"); | 
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            } | 
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 | 
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            /* | 
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             * For location "anywhere" the regex should be | 
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             * \bTERM\b|\bTERM\b, this checks the entire comment | 
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             * for the term. | 
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             */ | 
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            return new RegExp(prefix + escaped + suffix + eitherOrWordBoundary + term + wordBoundary, "iu"); | 
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        } | 
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 | 
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        const warningRegExps = warningTerms.map(convertToRegExp); | 
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 | 
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        /** | 
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         * Checks the specified comment for matches of the configured warning terms and returns the matches. | 
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         * @param {string} comment The comment which is checked. | 
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         * @returns {Array} All matched warning terms for this comment. | 
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         */ | 
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        function commentContainsWarningTerm(comment) { | 
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            const matches = []; | 
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 | 
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            warningRegExps.forEach((regex, index) => { | 
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                if (regex.test(comment)) { | 
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                    matches.push(warningTerms[index]); | 
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                } | 
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            }); | 
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 | 
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            return matches; | 
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        } | 
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 | 
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        /** | 
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         * Checks the specified node for matching warning comments and reports them. | 
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         * @param {ASTNode} node The AST node being checked. | 
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         * @returns {void} undefined. | 
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         */ | 
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        function checkComment(node) { | 
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            if (astUtils.isDirectiveComment(node) && selfConfigRegEx.test(node.value)) { | 
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                return; | 
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            } | 
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 | 
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            const matches = commentContainsWarningTerm(node.value); | 
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 | 
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            matches.forEach(matchedTerm => { | 
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                context.report({ | 
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                    node, | 
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                    message: "Unexpected '{{matchedTerm}}' comment.", | 
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                    data: { | 
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                        matchedTerm | 
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                    } | 
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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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            Program() { | 
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                const comments = sourceCode.getAllComments(); | 
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 | 
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                comments.filter(token => token.type !== "Shebang").forEach(checkComment); | 
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            } | 
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        }; | 
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    } | 
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};
 | 
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 |