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codeql-action/node_modules/eslint/lib/rules/one-var-declaration-per-line.js
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/** | |
* @fileoverview Rule to check multiple var declarations per line | |
* @author Alberto Rodríguez | |
*/ | |
"use strict"; | |
//------------------------------------------------------------------------------ | |
// Rule Definition | |
//------------------------------------------------------------------------------ | |
/** @type {import('../shared/types').Rule} */ | |
module.exports = { | |
meta: { | |
type: "suggestion", | |
docs: { | |
description: "Require or disallow newlines around variable declarations", | |
recommended: false, | |
url: "https://eslint.org/docs/latest/rules/one-var-declaration-per-line" | |
}, | |
schema: [ | |
{ | |
enum: ["always", "initializations"] | |
} | |
], | |
fixable: "whitespace", | |
messages: { | |
expectVarOnNewline: "Expected variable declaration to be on a new line." | |
} | |
}, | |
create(context) { | |
const always = context.options[0] === "always"; | |
//-------------------------------------------------------------------------- | |
// Helpers | |
//-------------------------------------------------------------------------- | |
/** | |
* Determine if provided keyword is a variant of for specifiers | |
* @private | |
* @param {string} keyword keyword to test | |
* @returns {boolean} True if `keyword` is a variant of for specifier | |
*/ | |
function isForTypeSpecifier(keyword) { | |
return keyword === "ForStatement" || keyword === "ForInStatement" || keyword === "ForOfStatement"; | |
} | |
/** | |
* Checks newlines around variable declarations. | |
* @private | |
* @param {ASTNode} node `VariableDeclaration` node to test | |
* @returns {void} | |
*/ | |
function checkForNewLine(node) { | |
if (isForTypeSpecifier(node.parent.type)) { | |
return; | |
} | |
const declarations = node.declarations; | |
let prev; | |
declarations.forEach(current => { | |
if (prev && prev.loc.end.line === current.loc.start.line) { | |
if (always || prev.init || current.init) { | |
context.report({ | |
node, | |
messageId: "expectVarOnNewline", | |
loc: current.loc, | |
fix: fixer => fixer.insertTextBefore(current, "\n") | |
}); | |
} | |
} | |
prev = current; | |
}); | |
} | |
//-------------------------------------------------------------------------- | |
// Public | |
//-------------------------------------------------------------------------- | |
return { | |
VariableDeclaration: checkForNewLine | |
}; | |
} | |
}; |