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codeql-action/node_modules/eslint/lib/rules/no-mixed-spaces-and-tabs.js
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/** | |
* @fileoverview Disallow mixed spaces and tabs for indentation | |
* @author Jary Niebur | |
*/ | |
"use strict"; | |
//------------------------------------------------------------------------------ | |
// Rule Definition | |
//------------------------------------------------------------------------------ | |
/** @type {import('../shared/types').Rule} */ | |
module.exports = { | |
meta: { | |
type: "layout", | |
docs: { | |
description: "Disallow mixed spaces and tabs for indentation", | |
recommended: true, | |
url: "https://eslint.org/docs/latest/rules/no-mixed-spaces-and-tabs" | |
}, | |
schema: [ | |
{ | |
enum: ["smart-tabs", true, false] | |
} | |
], | |
messages: { | |
mixedSpacesAndTabs: "Mixed spaces and tabs." | |
} | |
}, | |
create(context) { | |
const sourceCode = context.sourceCode; | |
let smartTabs; | |
switch (context.options[0]) { | |
case true: // Support old syntax, maybe add deprecation warning here | |
case "smart-tabs": | |
smartTabs = true; | |
break; | |
default: | |
smartTabs = false; | |
} | |
//-------------------------------------------------------------------------- | |
// Public | |
//-------------------------------------------------------------------------- | |
return { | |
"Program:exit"(node) { | |
const lines = sourceCode.lines, | |
comments = sourceCode.getAllComments(), | |
ignoredCommentLines = new Set(); | |
// Add all lines except the first ones. | |
comments.forEach(comment => { | |
for (let i = comment.loc.start.line + 1; i <= comment.loc.end.line; i++) { | |
ignoredCommentLines.add(i); | |
} | |
}); | |
/* | |
* At least one space followed by a tab | |
* or the reverse before non-tab/-space | |
* characters begin. | |
*/ | |
let regex = /^(?=( +|\t+))\1(?:\t| )/u; | |
if (smartTabs) { | |
/* | |
* At least one space followed by a tab | |
* before non-tab/-space characters begin. | |
*/ | |
regex = /^(?=(\t*))\1(?=( +))\2\t/u; | |
} | |
lines.forEach((line, i) => { | |
const match = regex.exec(line); | |
if (match) { | |
const lineNumber = i + 1; | |
const loc = { | |
start: { | |
line: lineNumber, | |
column: match[0].length - 2 | |
}, | |
end: { | |
line: lineNumber, | |
column: match[0].length | |
} | |
}; | |
if (!ignoredCommentLines.has(lineNumber)) { | |
const containingNode = sourceCode.getNodeByRangeIndex(sourceCode.getIndexFromLoc(loc.start)); | |
if (!(containingNode && ["Literal", "TemplateElement"].includes(containingNode.type))) { | |
context.report({ | |
node, | |
loc, | |
messageId: "mixedSpacesAndTabs" | |
}); | |
} | |
} | |
} | |
}); | |
} | |
}; | |
} | |
}; |