342 lines
14 KiB
JavaScript
342 lines
14 KiB
JavaScript
|
/**
|
||
|
|
* @fileoverview A module that filters reported problems based on `eslint-disable` and `eslint-enable` comments
|
||
|
|
* @author Teddy Katz
|
||
|
|
*/
|
||
|
|
|
||
|
|
"use strict";
|
||
|
|
|
||
|
|
const escapeRegExp = require("escape-string-regexp");
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Compares the locations of two objects in a source file
|
||
|
|
* @param {{line: number, column: number}} itemA The first object
|
||
|
|
* @param {{line: number, column: number}} itemB The second object
|
||
|
|
* @returns {number} A value less than 1 if itemA appears before itemB in the source file, greater than 1 if
|
||
|
|
* itemA appears after itemB in the source file, or 0 if itemA and itemB have the same location.
|
||
|
|
*/
|
||
|
|
function compareLocations(itemA, itemB) {
|
||
|
|
return itemA.line - itemB.line || itemA.column - itemB.column;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Groups a set of directives into sub-arrays by their parent comment.
|
||
|
|
* @param {Directive[]} directives Unused directives to be removed.
|
||
|
|
* @returns {Directive[][]} Directives grouped by their parent comment.
|
||
|
|
*/
|
||
|
|
function groupByParentComment(directives) {
|
||
|
|
const groups = new Map();
|
||
|
|
|
||
|
|
for (const directive of directives) {
|
||
|
|
const { unprocessedDirective: { parentComment } } = directive;
|
||
|
|
|
||
|
|
if (groups.has(parentComment)) {
|
||
|
|
groups.get(parentComment).push(directive);
|
||
|
|
} else {
|
||
|
|
groups.set(parentComment, [directive]);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return [...groups.values()];
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Creates removal details for a set of directives within the same comment.
|
||
|
|
* @param {Directive[]} directives Unused directives to be removed.
|
||
|
|
* @param {Token} commentToken The backing Comment token.
|
||
|
|
* @returns {{ description, fix, unprocessedDirective }[]} Details for later creation of output Problems.
|
||
|
|
*/
|
||
|
|
function createIndividualDirectivesRemoval(directives, commentToken) {
|
||
|
|
|
||
|
|
/*
|
||
|
|
* `commentToken.value` starts right after `//` or `/*`.
|
||
|
|
* All calculated offsets will be relative to this index.
|
||
|
|
*/
|
||
|
|
const commentValueStart = commentToken.range[0] + "//".length;
|
||
|
|
|
||
|
|
// Find where the list of rules starts. `\S+` matches with the directive name (e.g. `eslint-disable-line`)
|
||
|
|
const listStartOffset = /^\s*\S+\s+/u.exec(commentToken.value)[0].length;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Get the list text without any surrounding whitespace. In order to preserve the original
|
||
|
|
* formatting, we don't want to change that whitespace.
|
||
|
|
*
|
||
|
|
* // eslint-disable-line rule-one , rule-two , rule-three -- comment
|
||
|
|
* ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||
|
|
*/
|
||
|
|
const listText = commentToken.value
|
||
|
|
.slice(listStartOffset) // remove directive name and all whitespace before the list
|
||
|
|
.split(/\s-{2,}\s/u)[0] // remove `-- comment`, if it exists
|
||
|
|
.trimEnd(); // remove all whitespace after the list
|
||
|
|
|
||
|
|
/*
|
||
|
|
* We can assume that `listText` contains multiple elements.
|
||
|
|
* Otherwise, this function wouldn't be called - if there is
|
||
|
|
* only one rule in the list, then the whole comment must be removed.
|
||
|
|
*/
|
||
|
|
|
||
|
|
return directives.map(directive => {
|
||
|
|
const { ruleId } = directive;
|
||
|
|
|
||
|
|
const regex = new RegExp(String.raw`(?:^|\s*,\s*)${escapeRegExp(ruleId)}(?:\s*,\s*|$)`, "u");
|
||
|
|
const match = regex.exec(listText);
|
||
|
|
const matchedText = match[0];
|
||
|
|
const matchStartOffset = listStartOffset + match.index;
|
||
|
|
const matchEndOffset = matchStartOffset + matchedText.length;
|
||
|
|
|
||
|
|
const firstIndexOfComma = matchedText.indexOf(",");
|
||
|
|
const lastIndexOfComma = matchedText.lastIndexOf(",");
|
||
|
|
|
||
|
|
let removalStartOffset, removalEndOffset;
|
||
|
|
|
||
|
|
if (firstIndexOfComma !== lastIndexOfComma) {
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Since there are two commas, this must one of the elements in the middle of the list.
|
||
|
|
* Matched range starts where the previous rule name ends, and ends where the next rule name starts.
|
||
|
|
*
|
||
|
|
* // eslint-disable-line rule-one , rule-two , rule-three -- comment
|
||
|
|
* ^^^^^^^^^^^^^^
|
||
|
|
*
|
||
|
|
* We want to remove only the content between the two commas, and also one of the commas.
|
||
|
|
*
|
||
|
|
* // eslint-disable-line rule-one , rule-two , rule-three -- comment
|
||
|
|
* ^^^^^^^^^^^
|
||
|
|
*/
|
||
|
|
removalStartOffset = matchStartOffset + firstIndexOfComma;
|
||
|
|
removalEndOffset = matchStartOffset + lastIndexOfComma;
|
||
|
|
|
||
|
|
} else {
|
||
|
|
|
||
|
|
/*
|
||
|
|
* This is either the first element or the last element.
|
||
|
|
*
|
||
|
|
* If this is the first element, matched range starts where the first rule name starts
|
||
|
|
* and ends where the second rule name starts. This is exactly the range we want
|
||
|
|
* to remove so that the second rule name will start where the first one was starting
|
||
|
|
* and thus preserve the original formatting.
|
||
|
|
*
|
||
|
|
* // eslint-disable-line rule-one , rule-two , rule-three -- comment
|
||
|
|
* ^^^^^^^^^^^
|
||
|
|
*
|
||
|
|
* Similarly, if this is the last element, we've already matched the range we want to
|
||
|
|
* remove. The previous rule name will end where the last one was ending, relative
|
||
|
|
* to the content on the right side.
|
||
|
|
*
|
||
|
|
* // eslint-disable-line rule-one , rule-two , rule-three -- comment
|
||
|
|
* ^^^^^^^^^^^^^
|
||
|
|
*/
|
||
|
|
removalStartOffset = matchStartOffset;
|
||
|
|
removalEndOffset = matchEndOffset;
|
||
|
|
}
|
||
|
|
|
||
|
|
return {
|
||
|
|
description: `'${ruleId}'`,
|
||
|
|
fix: {
|
||
|
|
range: [
|
||
|
|
commentValueStart + removalStartOffset,
|
||
|
|
commentValueStart + removalEndOffset
|
||
|
|
],
|
||
|
|
text: ""
|
||
|
|
},
|
||
|
|
unprocessedDirective: directive.unprocessedDirective
|
||
|
|
};
|
||
|
|
});
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Creates a description of deleting an entire unused disable comment.
|
||
|
|
* @param {Directive[]} directives Unused directives to be removed.
|
||
|
|
* @param {Token} commentToken The backing Comment token.
|
||
|
|
* @returns {{ description, fix, unprocessedDirective }} Details for later creation of an output Problem.
|
||
|
|
*/
|
||
|
|
function createCommentRemoval(directives, commentToken) {
|
||
|
|
const { range } = commentToken;
|
||
|
|
const ruleIds = directives.filter(directive => directive.ruleId).map(directive => `'${directive.ruleId}'`);
|
||
|
|
|
||
|
|
return {
|
||
|
|
description: ruleIds.length <= 2
|
||
|
|
? ruleIds.join(" or ")
|
||
|
|
: `${ruleIds.slice(0, ruleIds.length - 1).join(", ")}, or ${ruleIds[ruleIds.length - 1]}`,
|
||
|
|
fix: {
|
||
|
|
range,
|
||
|
|
text: " "
|
||
|
|
},
|
||
|
|
unprocessedDirective: directives[0].unprocessedDirective
|
||
|
|
};
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Parses details from directives to create output Problems.
|
||
|
|
* @param {Directive[]} allDirectives Unused directives to be removed.
|
||
|
|
* @returns {{ description, fix, unprocessedDirective }[]} Details for later creation of output Problems.
|
||
|
|
*/
|
||
|
|
function processUnusedDisableDirectives(allDirectives) {
|
||
|
|
const directiveGroups = groupByParentComment(allDirectives);
|
||
|
|
|
||
|
|
return directiveGroups.flatMap(
|
||
|
|
directives => {
|
||
|
|
const { parentComment } = directives[0].unprocessedDirective;
|
||
|
|
const remainingRuleIds = new Set(parentComment.ruleIds);
|
||
|
|
|
||
|
|
for (const directive of directives) {
|
||
|
|
remainingRuleIds.delete(directive.ruleId);
|
||
|
|
}
|
||
|
|
|
||
|
|
return remainingRuleIds.size
|
||
|
|
? createIndividualDirectivesRemoval(directives, parentComment.commentToken)
|
||
|
|
: [createCommentRemoval(directives, parentComment.commentToken)];
|
||
|
|
}
|
||
|
|
);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* This is the same as the exported function, except that it
|
||
|
|
* doesn't handle disable-line and disable-next-line directives, and it always reports unused
|
||
|
|
* disable directives.
|
||
|
|
* @param {Object} options options for applying directives. This is the same as the options
|
||
|
|
* for the exported function, except that `reportUnusedDisableDirectives` is not supported
|
||
|
|
* (this function always reports unused disable directives).
|
||
|
|
* @returns {{problems: Problem[], unusedDisableDirectives: Problem[]}} An object with a list
|
||
|
|
* of problems (including suppressed ones) and unused eslint-disable directives
|
||
|
|
*/
|
||
|
|
function applyDirectives(options) {
|
||
|
|
const problems = [];
|
||
|
|
const usedDisableDirectives = new Set();
|
||
|
|
|
||
|
|
for (const problem of options.problems) {
|
||
|
|
let disableDirectivesForProblem = [];
|
||
|
|
let nextDirectiveIndex = 0;
|
||
|
|
|
||
|
|
while (
|
||
|
|
nextDirectiveIndex < options.directives.length &&
|
||
|
|
compareLocations(options.directives[nextDirectiveIndex], problem) <= 0
|
||
|
|
) {
|
||
|
|
const directive = options.directives[nextDirectiveIndex++];
|
||
|
|
|
||
|
|
if (directive.ruleId === null || directive.ruleId === problem.ruleId) {
|
||
|
|
switch (directive.type) {
|
||
|
|
case "disable":
|
||
|
|
disableDirectivesForProblem.push(directive);
|
||
|
|
break;
|
||
|
|
|
||
|
|
case "enable":
|
||
|
|
disableDirectivesForProblem = [];
|
||
|
|
break;
|
||
|
|
|
||
|
|
// no default
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (disableDirectivesForProblem.length > 0) {
|
||
|
|
const suppressions = disableDirectivesForProblem.map(directive => ({
|
||
|
|
kind: "directive",
|
||
|
|
justification: directive.unprocessedDirective.justification
|
||
|
|
}));
|
||
|
|
|
||
|
|
if (problem.suppressions) {
|
||
|
|
problem.suppressions = problem.suppressions.concat(suppressions);
|
||
|
|
} else {
|
||
|
|
problem.suppressions = suppressions;
|
||
|
|
usedDisableDirectives.add(disableDirectivesForProblem[disableDirectivesForProblem.length - 1]);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
problems.push(problem);
|
||
|
|
}
|
||
|
|
|
||
|
|
const unusedDisableDirectivesToReport = options.directives
|
||
|
|
.filter(directive => directive.type === "disable" && !usedDisableDirectives.has(directive));
|
||
|
|
|
||
|
|
const processed = processUnusedDisableDirectives(unusedDisableDirectivesToReport);
|
||
|
|
|
||
|
|
const unusedDisableDirectives = processed
|
||
|
|
.map(({ description, fix, unprocessedDirective }) => {
|
||
|
|
const { parentComment, type, line, column } = unprocessedDirective;
|
||
|
|
|
||
|
|
return {
|
||
|
|
ruleId: null,
|
||
|
|
message: description
|
||
|
|
? `Unused eslint-disable directive (no problems were reported from ${description}).`
|
||
|
|
: "Unused eslint-disable directive (no problems were reported).",
|
||
|
|
line: type === "disable-next-line" ? parentComment.commentToken.loc.start.line : line,
|
||
|
|
column: type === "disable-next-line" ? parentComment.commentToken.loc.start.column + 1 : column,
|
||
|
|
severity: options.reportUnusedDisableDirectives === "warn" ? 1 : 2,
|
||
|
|
nodeType: null,
|
||
|
|
...options.disableFixes ? {} : { fix }
|
||
|
|
};
|
||
|
|
});
|
||
|
|
|
||
|
|
return { problems, unusedDisableDirectives };
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Given a list of directive comments (i.e. metadata about eslint-disable and eslint-enable comments) and a list
|
||
|
|
* of reported problems, adds the suppression information to the problems.
|
||
|
|
* @param {Object} options Information about directives and problems
|
||
|
|
* @param {{
|
||
|
|
* type: ("disable"|"enable"|"disable-line"|"disable-next-line"),
|
||
|
|
* ruleId: (string|null),
|
||
|
|
* line: number,
|
||
|
|
* column: number,
|
||
|
|
* justification: string
|
||
|
|
* }} options.directives Directive comments found in the file, with one-based columns.
|
||
|
|
* Two directive comments can only have the same location if they also have the same type (e.g. a single eslint-disable
|
||
|
|
* comment for two different rules is represented as two directives).
|
||
|
|
* @param {{ruleId: (string|null), line: number, column: number}[]} options.problems
|
||
|
|
* A list of problems reported by rules, sorted by increasing location in the file, with one-based columns.
|
||
|
|
* @param {"off" | "warn" | "error"} options.reportUnusedDisableDirectives If `"warn"` or `"error"`, adds additional problems for unused directives
|
||
|
|
* @param {boolean} options.disableFixes If true, it doesn't make `fix` properties.
|
||
|
|
* @returns {{ruleId: (string|null), line: number, column: number, suppressions?: {kind: string, justification: string}}[]}
|
||
|
|
* An object with a list of reported problems, the suppressed of which contain the suppression information.
|
||
|
|
*/
|
||
|
|
module.exports = ({ directives, disableFixes, problems, reportUnusedDisableDirectives = "off" }) => {
|
||
|
|
const blockDirectives = directives
|
||
|
|
.filter(directive => directive.type === "disable" || directive.type === "enable")
|
||
|
|
.map(directive => Object.assign({}, directive, { unprocessedDirective: directive }))
|
||
|
|
.sort(compareLocations);
|
||
|
|
|
||
|
|
const lineDirectives = directives.flatMap(directive => {
|
||
|
|
switch (directive.type) {
|
||
|
|
case "disable":
|
||
|
|
case "enable":
|
||
|
|
return [];
|
||
|
|
|
||
|
|
case "disable-line":
|
||
|
|
return [
|
||
|
|
{ type: "disable", line: directive.line, column: 1, ruleId: directive.ruleId, unprocessedDirective: directive },
|
||
|
|
{ type: "enable", line: directive.line + 1, column: 0, ruleId: directive.ruleId, unprocessedDirective: directive }
|
||
|
|
];
|
||
|
|
|
||
|
|
case "disable-next-line":
|
||
|
|
return [
|
||
|
|
{ type: "disable", line: directive.line + 1, column: 1, ruleId: directive.ruleId, unprocessedDirective: directive },
|
||
|
|
{ type: "enable", line: directive.line + 2, column: 0, ruleId: directive.ruleId, unprocessedDirective: directive }
|
||
|
|
];
|
||
|
|
|
||
|
|
default:
|
||
|
|
throw new TypeError(`Unrecognized directive type '${directive.type}'`);
|
||
|
|
}
|
||
|
|
}).sort(compareLocations);
|
||
|
|
|
||
|
|
const blockDirectivesResult = applyDirectives({
|
||
|
|
problems,
|
||
|
|
directives: blockDirectives,
|
||
|
|
disableFixes,
|
||
|
|
reportUnusedDisableDirectives
|
||
|
|
});
|
||
|
|
const lineDirectivesResult = applyDirectives({
|
||
|
|
problems: blockDirectivesResult.problems,
|
||
|
|
directives: lineDirectives,
|
||
|
|
disableFixes,
|
||
|
|
reportUnusedDisableDirectives
|
||
|
|
});
|
||
|
|
|
||
|
|
return reportUnusedDisableDirectives !== "off"
|
||
|
|
? lineDirectivesResult.problems
|
||
|
|
.concat(blockDirectivesResult.unusedDisableDirectives)
|
||
|
|
.concat(lineDirectivesResult.unusedDisableDirectives)
|
||
|
|
.sort(compareLocations)
|
||
|
|
: lineDirectivesResult.problems;
|
||
|
|
};
|