FM / rules

/home/techb158/balavpn.abdallabala.com/node_modules/eslint/lib/rules/

/home/techb158/balavpn.abdallabala.com/node_modules/eslint/lib/rules

Name	Size	Mode	Actions
utils/	-	0777	rm
accessor-pairs.js	11210	0666	edit dl rm
array-bracket-newline.js	8123	0666	edit dl rm
array-bracket-spacing.js	8071	0666	edit dl rm
array-callback-return.js	12815	0666	edit dl rm
array-element-newline.js	9070	0666	edit dl rm
arrow-body-style.js	10365	0666	edit dl rm
arrow-parens.js	7119	0666	edit dl rm
arrow-spacing.js	4618	0666	edit dl rm
block-scoped-var.js	3501	0666	edit dl rm
block-spacing.js	5159	0666	edit dl rm
brace-style.js	7592	0666	edit dl rm
callback-return.js	5879	0666	edit dl rm
camelcase.js	10363	0666	edit dl rm
capitalized-comments.js	9285	0666	edit dl rm
class-methods-use-this.js	6393	0666	edit dl rm
comma-dangle.js	11652	0666	edit dl rm
comma-spacing.js	5892	0666	edit dl rm
comma-style.js	10241	0666	edit dl rm
complexity.js	5194	0666	edit dl rm
computed-property-spacing.js	6703	0666	edit dl rm
consistent-return.js	5739	0666	edit dl rm
consistent-this.js	4429	0666	edit dl rm
constructor-super.js	12051	0666	edit dl rm
curly.js	11758	0666	edit dl rm
default-case-last.js	1103	0666	edit dl rm
default-case.js	2311	0666	edit dl rm
default-param-last.js	1690	0666	edit dl rm
dot-location.js	3404	0666	edit dl rm
dot-notation.js	5192	0666	edit dl rm
eol-last.js	3566	0666	edit dl rm
eqeqeq.js	4874	0666	edit dl rm
for-direction.js	4305	0666	edit dl rm
func-call-spacing.js	8290	0666	edit dl rm
func-name-matching.js	8835	0666	edit dl rm
func-names.js	5135	0666	edit dl rm
func-style.js	5337	0666	edit dl rm
function-call-argument-newline.js	4222	0666	edit dl rm
function-paren-newline.js	10198	0666	edit dl rm
generator-star-spacing.js	6319	0666	edit dl rm
getter-return.js	5756	0666	edit dl rm
global-require.js	2853	0666	edit dl rm
grouped-accessor-pairs.js	7185	0666	edit dl rm
guard-for-in.js	1924	0666	edit dl rm
handle-callback-err.js	3247	0666	edit dl rm
id-blacklist.js	6700	0666	edit dl rm
id-denylist.js	6357	0666	edit dl rm
id-length.js	5613	0666	edit dl rm
id-match.js	9208	0666	edit dl rm
implicit-arrow-linebreak.js	3147	0666	edit dl rm
indent-legacy.js	35743	0666	edit dl rm
indent.js	66474	0666	edit dl rm
index.js	17913	0666	edit dl rm
init-declarations.js	3974	0666	edit dl rm
jsx-quotes.js	3147	0666	edit dl rm
key-spacing.js	21268	0666	edit dl rm
keyword-spacing.js	20417	0666	edit dl rm
line-comment-position.js	3736	0666	edit dl rm
linebreak-style.js	3569	0666	edit dl rm
lines-around-comment.js	15497	0666	edit dl rm
lines-around-directive.js	7023	0666	edit dl rm
lines-between-class-members.js	10129	0666	edit dl rm
logical-assignment-operators.js	19047	0666	edit dl rm
max-classes-per-file.js	1858	0666	edit dl rm
max-depth.js	3633	0666	edit dl rm
max-len.js	13652	0666	edit dl rm
max-lines-per-function.js	6050	0666	edit dl rm
max-lines.js	4403	0666	edit dl rm
max-nested-callbacks.js	2691	0666	edit dl rm
max-params.js	3075	0666	edit dl rm
max-statements-per-line.js	6738	0666	edit dl rm
max-statements.js	4575	0666	edit dl rm
multiline-comment-style.js	18395	0666	edit dl rm
multiline-ternary.js	6541	0666	edit dl rm
new-cap.js	7204	0666	edit dl rm
new-parens.js	3167	0666	edit dl rm
newline-after-var.js	8852	0666	edit dl rm
newline-before-return.js	7126	0666	edit dl rm
newline-per-chained-call.js	3883	0666	edit dl rm
no-alert.js	3843	0666	edit dl rm
no-array-constructor.js	4995	0666	edit dl rm
no-async-promise-executor.js	1007	0666	edit dl rm
no-await-in-loop.js	2494	0666	edit dl rm
no-bitwise.js	2948	0666	edit dl rm
no-buffer-constructor.js	1868	0666	edit dl rm
no-caller.js	1086	0666	edit dl rm
no-case-declarations.js	1867	0666	edit dl rm
no-catch-shadow.js	2515	0666	edit dl rm
no-class-assign.js	1566	0666	edit dl rm
no-compare-neg-zero.js	1662	0666	edit dl rm
no-cond-assign.js	4837	0666	edit dl rm
no-confusing-arrow.js	3232	0666	edit dl rm
no-console.js	6233	0666	edit dl rm
no-const-assign.js	1848	0666	edit dl rm
no-constant-binary-expression.js	18150	0666	edit dl rm
no-constant-condition.js	4469	0666	edit dl rm
no-constructor-return.js	1191	0666	edit dl rm
no-continue.js	784	0666	edit dl rm
no-control-regex.js	3830	0666	edit dl rm
no-debugger.js	793	0666	edit dl rm
no-delete-var.js	852	0666	edit dl rm
no-div-regex.js	1245	0666	edit dl rm
no-dupe-args.js	2387	0666	edit dl rm
no-dupe-class-members.js	2905	0666	edit dl rm
no-dupe-else-if.js	4197	0666	edit dl rm
no-dupe-keys.js	3963	0666	edit dl rm
no-duplicate-case.js	1765	0666	edit dl rm
no-duplicate-imports.js	10024	0666	edit dl rm
no-else-return.js	13405	0666	edit dl rm
no-empty-character-class.js	1938	0666	edit dl rm
no-empty-function.js	5754	0666	edit dl rm
no-empty-pattern.js	1841	0666	edit dl rm
no-empty-static-block.js	1589	0666	edit dl rm
no-empty.js	3202	0666	edit dl rm
no-eq-null.js	1117	0666	edit dl rm
no-eval.js	7542	0666	edit dl rm
no-ex-assign.js	1301	0666	edit dl rm
no-extend-native.js	5421	0666	edit dl rm
no-extra-bind.js	6007	0666	edit dl rm
no-extra-boolean-cast.js	10590	0666	edit dl rm
no-extra-label.js	4265	0666	edit dl rm
no-extra-parens.js	43596	0666	edit dl rm
no-extra-semi.js	4628	0666	edit dl rm
no-fallthrough.js	6966	0666	edit dl rm
no-floating-decimal.js	2568	0666	edit dl rm
no-func-assign.js	1861	0666	edit dl rm
no-global-assign.js	2426	0666	edit dl rm
no-implicit-coercion.js	12600	0666	edit dl rm
no-implicit-globals.js	4626	0666	edit dl rm
no-implied-eval.js	4339	0666	edit dl rm
no-import-assign.js	6179	0666	edit dl rm
no-inline-comments.js	2691	0666	edit dl rm
no-inner-declarations.js	3221	0666	edit dl rm
no-invalid-regexp.js	5962	0666	edit dl rm
no-invalid-this.js	4488	0666	edit dl rm
no-irregular-whitespace.js	7853	0666	edit dl rm
no-iterator.js	1110	0666	edit dl rm
no-label-var.js	2063	0666	edit dl rm
no-labels.js	3365	0666	edit dl rm
no-lone-blocks.js	3320	0666	edit dl rm
no-lonely-if.js	3303	0666	edit dl rm
no-loop-func.js	7035	0666	edit dl rm
no-loss-of-precision.js	7393	0666	edit dl rm
no-magic-numbers.js	10580	0666	edit dl rm
no-misleading-character-class.js	16369	0666	edit dl rm
no-mixed-operators.js	7147	0666	edit dl rm
no-mixed-requires.js	6383	0666	edit dl rm
no-mixed-spaces-and-tabs.js	3465	0666	edit dl rm
no-multi-assign.js	1327	0666	edit dl rm
no-multi-spaces.js	4588	0666	edit dl rm
no-multi-str.js	1610	0666	edit dl rm
no-multiple-empty-lines.js	5581	0666	edit dl rm
no-native-reassign.js	2765	0666	edit dl rm
no-negated-condition.js	2431	0666	edit dl rm
no-negated-in-lhs.js	1338	0666	edit dl rm
no-nested-ternary.js	960	0666	edit dl rm
no-new-func.js	2393	0666	edit dl rm
no-new-native-nonconstructor.js	1754	0666	edit dl rm
no-new-object.js	1866	0666	edit dl rm
no-new-require.js	1588	0666	edit dl rm
no-new-symbol.js	1739	0666	edit dl rm
no-new-wrappers.js	1460	0666	edit dl rm
no-new.js	905	0666	edit dl rm
no-nonoctal-decimal-escape.js	4566	0666	edit dl rm
no-obj-calls.js	2466	0666	edit dl rm
no-object-constructor.js	2923	0666	edit dl rm
no-octal-escape.js	1175	0666	edit dl rm
no-octal.js	832	0666	edit dl rm
no-param-reassign.js	6363	0666	edit dl rm
no-path-concat.js	2012	0666	edit dl rm
no-plusplus.js	2672	0666	edit dl rm
no-process-env.js	1646	0666	edit dl rm
no-process-exit.js	1735	0666	edit dl rm
no-promise-executor-return.js	6675	0666	edit dl rm
no-proto.js	1093	0666	edit dl rm
no-prototype-builtins.js	4721	0666	edit dl rm
no-redeclare.js	4425	0666	edit dl rm
no-regex-spaces.js	5276	0666	edit dl rm
no-restricted-exports.js	5636	0666	edit dl rm
no-restricted-globals.js	6229	0666	edit dl rm
no-restricted-imports.js	23880	0666	edit dl rm
no-restricted-modules.js	6128	0666	edit dl rm
no-restricted-properties.js	5948	0666	edit dl rm
no-restricted-syntax.js	1698	0666	edit dl rm
no-return-assign.js	2259	0666	edit dl rm
no-return-await.js	4457	0666	edit dl rm
no-script-url.js	1512	0666	edit dl rm
no-self-assign.js	4666	0666	edit dl rm
no-self-compare.js	1705	0666	edit dl rm
no-sequences.js	4011	0666	edit dl rm
no-setter-return.js	5725	0666	edit dl rm
no-shadow-restricted-names.js	2672	0666	edit dl rm
no-shadow.js	17353	0666	edit dl rm
no-spaced-func.js	2603	0666	edit dl rm
no-sparse-arrays.js	1483	0666	edit dl rm
no-sync.js	1887	0666	edit dl rm
no-tabs.js	2449	0666	edit dl rm
no-template-curly-in-string.js	989	0666	edit dl rm
no-ternary.js	785	0666	edit dl rm
no-this-before-super.js	9043	0666	edit dl rm
no-throw-literal.js	1088	0666	edit dl rm
no-trailing-spaces.js	6110	0666	edit dl rm
no-unassigned-vars.js	1964	0666	edit dl rm
no-undef-init.js	2409	0666	edit dl rm
no-undef.js	1899	0666	edit dl rm
no-undefined.js	1861	0666	edit dl rm
no-underscore-dangle.js	9535	0666	edit dl rm
no-unexpected-multiline.js	3477	0666	edit dl rm
no-unmodified-loop-condition.js	10035	0666	edit dl rm
no-unneeded-ternary.js	5935	0666	edit dl rm
no-unreachable-loop.js	5076	0666	edit dl rm
no-unreachable.js	7498	0666	edit dl rm
no-unsafe-finally.js	3339	0666	edit dl rm
no-unsafe-negation.js	3972	0666	edit dl rm
no-unsafe-optional-chaining.js	5389	0666	edit dl rm
no-unused-expressions.js	5520	0666	edit dl rm
no-unused-labels.js	3878	0666	edit dl rm
no-unused-private-class-members.js	6277	0666	edit dl rm
no-unused-vars.js	48552	0666	edit dl rm
no-use-before-define.js	11866	0666	edit dl rm
no-useless-assignment.js	19334	0666	edit dl rm
no-useless-backreference.js	7662	0666	edit dl rm
no-useless-call.js	2779	0666	edit dl rm
no-useless-catch.js	1310	0666	edit dl rm
no-useless-computed-key.js	5936	0666	edit dl rm
no-useless-concat.js	2966	0666	edit dl rm
no-useless-constructor.js	6986	0666	edit dl rm
no-useless-escape.js	11065	0666	edit dl rm
no-useless-rename.js	4929	0666	edit dl rm
no-useless-return.js	11954	0666	edit dl rm
no-var.js	11461	0666	edit dl rm
no-void.js	1366	0666	edit dl rm
no-warning-comments.js	5670	0666	edit dl rm
no-whitespace-before-property.js	3883	0666	edit dl rm
no-with.js	757	0666	edit dl rm
nonblock-statement-body-position.js	4418	0666	edit dl rm
object-curly-newline.js	10115	0666	edit dl rm
object-curly-spacing.js	10399	0666	edit dl rm
object-property-newline.js	3758	0666	edit dl rm
object-shorthand.js	18543	0666	edit dl rm
one-var-declaration-per-line.js	2995	0666	edit dl rm
one-var.js	19182	0666	edit dl rm
operator-assignment.js	7536	0666	edit dl rm
operator-linebreak.js	8901	0666	edit dl rm
padded-blocks.js	8910	0666	edit dl rm
padding-line-between-statements.js	16989	0666	edit dl rm
prefer-arrow-callback.js	11667	0666	edit dl rm
prefer-const.js	15780	0666	edit dl rm
prefer-destructuring.js	8931	0666	edit dl rm
prefer-exponentiation-operator.js	6727	0666	edit dl rm
prefer-named-capture-group.js	5048	0666	edit dl rm
prefer-numeric-literals.js	4504	0666	edit dl rm
prefer-object-has-own.js	3804	0666	edit dl rm
prefer-object-spread.js	9489	0666	edit dl rm
prefer-promise-reject-errors.js	4614	0666	edit dl rm
prefer-reflect.js	3828	0666	edit dl rm
prefer-regex-literals.js	14379	0666	edit dl rm
prefer-rest-params.js	3032	0666	edit dl rm
prefer-spread.js	2555	0666	edit dl rm
prefer-template.js	10537	0666	edit dl rm
preserve-caught-error.js	16269	0666	edit dl rm
quote-props.js	10129	0666	edit dl rm
quotes.js	10934	0666	edit dl rm
radix.js	5549	0666	edit dl rm
require-atomic-updates.js	9293	0666	edit dl rm
require-await.js	4564	0666	edit dl rm
require-unicode-regexp.js	7765	0666	edit dl rm
require-yield.js	1718	0666	edit dl rm
rest-spread-spacing.js	3739	0666	edit dl rm
semi-spacing.js	7384	0666	edit dl rm
semi-style.js	5246	0666	edit dl rm
semi.js	13324	0666	edit dl rm
sort-imports.js	8603	0666	edit dl rm
sort-keys.js	5880	0666	edit dl rm
sort-vars.js	3320	0666	edit dl rm
space-before-blocks.js	6328	0666	edit dl rm
space-before-function-paren.js	5253	0666	edit dl rm
space-in-parens.js	9314	0666	edit dl rm
space-infix-ops.js	5890	0666	edit dl rm
space-unary-ops.js	10644	0666	edit dl rm
spaced-comment.js	11246	0666	edit dl rm
strict.js	9141	0666	edit dl rm
switch-colon-spacing.js	4701	0666	edit dl rm
symbol-description.js	1701	0666	edit dl rm
template-curly-spacing.js	4337	0666	edit dl rm
template-tag-spacing.js	3059	0666	edit dl rm
unicode-bom.js	1716	0666	edit dl rm
use-isnan.js	7130	0666	edit dl rm
valid-typeof.js	4262	0666	edit dl rm
vars-on-top.js	4304	0666	edit dl rm
wrap-iife.js	6914	0666	edit dl rm
wrap-regex.js	2167	0666	edit dl rm
yield-star-spacing.js	3992	0666	edit dl rm
yoda.js	9713	0666	edit dl rm

Edit: /home/techb158/balavpn.abdallabala.com/node_modules/eslint/lib/rules/prefer-const.js (15780B)

/**
 * @fileoverview A rule to suggest using of const declaration for variables that are never reassigned after declared.
 * @author Toru Nagashima
 */

"use strict";

//------------------------------------------------------------------------------
// Requirements
//------------------------------------------------------------------------------

const FixTracker = require("./utils/fix-tracker");
const astUtils = require("./utils/ast-utils");

//------------------------------------------------------------------------------
// Helpers
//------------------------------------------------------------------------------

/**
 * Checks whether a given node is located at `ForStatement.init` or not.
 * @param {ASTNode} node A node to check.
 * @returns {boolean} `true` if the node is located at `ForStatement.init`.
 */
function isInitOfForStatement(node) {
	return node.parent.type === "ForStatement" && node.parent.init === node;
}

/**
 * Checks whether a given Identifier node becomes a VariableDeclaration or not.
 * @param {ASTNode} identifier An Identifier node to check.
 * @returns {boolean} `true` if the node can become a VariableDeclaration.
 */
function canBecomeVariableDeclaration(identifier) {
	let node = identifier.parent;

while (PATTERN_TYPE.test(node.type)) {
		node = node.parent;
	}

return (
		node.type === "VariableDeclarator" ||
		(node.type === "AssignmentExpression" &&
			node.parent.type === "ExpressionStatement" &&
			DECLARATION_HOST_TYPE.test(node.parent.parent.type))
	);
}

/**
 * Checks if an property or element is from outer scope or function parameters
 * in destructing pattern.
 * @param {string} name A variable name to be checked.
 * @param {eslint-scope.Scope} initScope A scope to start find.
 * @returns {boolean} Indicates if the variable is from outer scope or function parameters.
 */
function isOuterVariableInDestructing(name, initScope) {
	if (
		initScope.through.some(
			ref => ref.resolved && ref.resolved.name === name,
		)
	) {
		return true;
	}

const variable = astUtils.getVariableByName(initScope, name);

if (variable !== null) {
		return variable.defs.some(def => def.type === "Parameter");
	}

return false;
}

/**
 * Gets the VariableDeclarator/AssignmentExpression node that a given reference
 * belongs to.
 * This is used to detect a mix of reassigned and never reassigned in a
 * destructuring.
 * @param {eslint-scope.Reference} reference A reference to get.
 * @returns {ASTNode|null} A VariableDeclarator/AssignmentExpression node or
 *      null.
 */
function getDestructuringHost(reference) {
	if (!reference.isWrite()) {
		return null;
	}
	let node = reference.identifier.parent;

while (PATTERN_TYPE.test(node.type)) {
		node = node.parent;
	}

if (!DESTRUCTURING_HOST_TYPE.test(node.type)) {
		return null;
	}
	return node;
}

/**
 * Determines if a destructuring assignment node contains
 * any MemberExpression nodes. This is used to determine if a
 * variable that is only written once using destructuring can be
 * safely converted into a const declaration.
 * @param {ASTNode} node The ObjectPattern or ArrayPattern node to check.
 * @returns {boolean} True if the destructuring pattern contains
 *      a MemberExpression, false if not.
 */
function hasMemberExpressionAssignment(node) {
	switch (node.type) {
		case "ObjectPattern":
			return node.properties.some(prop => {
				if (prop) {
					/*
					 * Spread elements have an argument property while
					 * others have a value property. Because different
					 * parsers use different node types for spread elements,
					 * we just check if there is an argument property.
					 */
					return hasMemberExpressionAssignment(
						prop.argument || prop.value,
					);
				}

return false;
			});

case "ArrayPattern":
			return node.elements.some(element => {
				if (element) {
					return hasMemberExpressionAssignment(element);
				}

return false;
			});

case "AssignmentPattern":
			return hasMemberExpressionAssignment(node.left);

case "MemberExpression":
			return true;

// no default
	}

return false;
}

/**
 * Gets an identifier node of a given variable.
 *
 * If the initialization exists or one or more reading references exist before
 * the first assignment, the identifier node is the node of the declaration.
 * Otherwise, the identifier node is the node of the first assignment.
 *
 * If the variable should not change to const, this function returns null.
 * - If the variable is reassigned.
 * - If the variable is never initialized nor assigned.
 * - If the variable is initialized in a different scope from the declaration.
 * - If the unique assignment of the variable cannot change to a declaration.
 *   e.g. `if (a) b = 1` / `return (b = 1)`
 * - If the variable is declared in the global scope and `eslintUsed` is `true`.
 *   `/*exported foo` directive comment makes such variables. This rule does not
 *   warn such variables because this rule cannot distinguish whether the
 *   exported variables are reassigned or not.
 * @param {eslint-scope.Variable} variable A variable to get.
 * @param {boolean} ignoreReadBeforeAssign
 *      The value of `ignoreReadBeforeAssign` option.
 * @returns {ASTNode|null}
 *      An Identifier node if the variable should change to const.
 *      Otherwise, null.
 */
function getIdentifierIfShouldBeConst(variable, ignoreReadBeforeAssign) {
	if (variable.eslintUsed && variable.scope.type === "global") {
		return null;
	}

// Finds the unique WriteReference.
	let writer = null;
	let isReadBeforeInit = false;
	const references = variable.references;

for (let i = 0; i < references.length; ++i) {
		const reference = references[i];

if (reference.isWrite()) {
			const isReassigned =
				writer !== null && writer.identifier !== reference.identifier;

if (isReassigned) {
				return null;
			}

const destructuringHost = getDestructuringHost(reference);

if (
				destructuringHost !== null &&
				destructuringHost.left !== void 0
			) {
				const leftNode = destructuringHost.left;
				let hasOuterVariables = false,
					hasNonIdentifiers = false;

if (leftNode.type === "ObjectPattern") {
					const properties = leftNode.properties;

hasOuterVariables = properties
						.filter(prop => prop.value)
						.map(prop => prop.value.name)
						.some(name =>
							isOuterVariableInDestructing(name, variable.scope),
						);

hasNonIdentifiers = hasMemberExpressionAssignment(leftNode);
				} else if (leftNode.type === "ArrayPattern") {
					const elements = leftNode.elements;

hasOuterVariables = elements
						.map(element => element && element.name)
						.some(name =>
							isOuterVariableInDestructing(name, variable.scope),
						);

hasNonIdentifiers = hasMemberExpressionAssignment(leftNode);
				}

if (hasOuterVariables || hasNonIdentifiers) {
					return null;
				}
			}

writer = reference;
		} else if (reference.isRead() && writer === null) {
			if (ignoreReadBeforeAssign) {
				return null;
			}
			isReadBeforeInit = true;
		}
	}

/*
	 * If the assignment is from a different scope, ignore it.
	 * If the assignment cannot change to a declaration, ignore it.
	 */
	const shouldBeConst =
		writer !== null &&
		writer.from === variable.scope &&
		canBecomeVariableDeclaration(writer.identifier);

if (!shouldBeConst) {
		return null;
	}

if (isReadBeforeInit) {
		return variable.defs[0].name;
	}

return writer.identifier;
}

/**
 * Groups by the VariableDeclarator/AssignmentExpression node that each
 * reference of given variables belongs to.
 * This is used to detect a mix of reassigned and never reassigned in a
 * destructuring.
 * @param {eslint-scope.Variable[]} variables Variables to group by destructuring.
 * @param {boolean} ignoreReadBeforeAssign
 *      The value of `ignoreReadBeforeAssign` option.
 * @returns {Map<ASTNode, ASTNode[]>} Grouped identifier nodes.
 */
function groupByDestructuring(variables, ignoreReadBeforeAssign) {
	const identifierMap = new Map();

for (let i = 0; i < variables.length; ++i) {
		const variable = variables[i];
		const references = variable.references;
		const identifier = getIdentifierIfShouldBeConst(
			variable,
			ignoreReadBeforeAssign,
		);
		let prevId = null;

for (let j = 0; j < references.length; ++j) {
			const reference = references[j];
			const id = reference.identifier;

/*
			 * Avoid counting a reference twice or more for default values of
			 * destructuring.
			 */
			if (id === prevId) {
				continue;
			}
			prevId = id;

// Add the identifier node into the destructuring group.
			const group = getDestructuringHost(reference);

if (group) {
				if (identifierMap.has(group)) {
					identifierMap.get(group).push(identifier);
				} else {
					identifierMap.set(group, [identifier]);
				}
			}
		}
	}

return identifierMap;
}

/**
 * Finds the nearest parent of node with a given type.
 * @param {ASTNode} node The node to search from.
 * @param {string} type The type field of the parent node.
 * @param {Function} shouldStop A predicate that returns true if the traversal should stop, and false otherwise.
 * @returns {ASTNode} The closest ancestor with the specified type; null if no such ancestor exists.
 */
function findUp(node, type, shouldStop) {
	if (!node || shouldStop(node)) {
		return null;
	}
	if (node.type === type) {
		return node;
	}
	return findUp(node.parent, type, shouldStop);
}

//------------------------------------------------------------------------------
// Rule Definition
//------------------------------------------------------------------------------

/** @type {import('../types').Rule.RuleModule} */
module.exports = {
	meta: {
		type: "suggestion",

defaultOptions: [
			{
				destructuring: "any",
				ignoreReadBeforeAssign: false,
			},
		],

docs: {
			description:
				"Require `const` declarations for variables that are never reassigned after declared",
			recommended: false,
			url: "https://eslint.org/docs/latest/rules/prefer-const",
		},

fixable: "code",

schema: [
			{
				type: "object",
				properties: {
					destructuring: { enum: ["any", "all"] },
					ignoreReadBeforeAssign: { type: "boolean" },
				},
				additionalProperties: false,
			},
		],
		messages: {
			useConst: "'{{name}}' is never reassigned. Use 'const' instead.",
		},
	},

create(context) {
		const [{ destructuring, ignoreReadBeforeAssign }] = context.options;
		const shouldMatchAnyDestructuredVariable = destructuring !== "all";
		const sourceCode = context.sourceCode;
		const variables = [];
		let reportCount = 0;
		let checkedId = null;
		let checkedName = "";

/**
		 * Reports given identifier nodes if all of the nodes should be declared
		 * as const.
		 *
		 * The argument 'nodes' is an array of Identifier nodes.
		 * This node is the result of 'getIdentifierIfShouldBeConst()', so it's
		 * nullable. In simple declaration or assignment cases, the length of
		 * the array is 1. In destructuring cases, the length of the array can
		 * be 2 or more.
		 * @param {(eslint-scope.Reference|null)[]} nodes
		 *      References which are grouped by destructuring to report.
		 * @returns {void}
		 */
		function checkGroup(nodes) {
			const nodesToReport = nodes.filter(Boolean);

if (
				nodes.length &&
				(shouldMatchAnyDestructuredVariable ||
					nodesToReport.length === nodes.length)
			) {
				const varDeclParent = findUp(
					nodes[0],
					"VariableDeclaration",
					parentNode => parentNode.type.endsWith("Statement"),
				);
				const isVarDecParentNull = varDeclParent === null;

if (
					!isVarDecParentNull &&
					varDeclParent.declarations.length > 0
				) {
					const firstDeclaration = varDeclParent.declarations[0];

if (firstDeclaration.init) {
						const firstDecParent = firstDeclaration.init.parent;

/*
						 * First we check the declaration type and then depending on
						 * if the type is a "VariableDeclarator" or its an "ObjectPattern"
						 * we compare the name and id from the first identifier, if the names are different
						 * we assign the new name, id and reset the count of reportCount and nodeCount in
						 * order to check each block for the number of reported errors and base our fix
						 * based on comparing nodes.length and nodesToReport.length.
						 */

if (firstDecParent.type === "VariableDeclarator") {
							if (firstDecParent.id.name !== checkedName) {
								checkedName = firstDecParent.id.name;
								reportCount = 0;
							}

if (firstDecParent.id.type === "ObjectPattern") {
								if (firstDecParent.init.name !== checkedName) {
									checkedName = firstDecParent.init.name;
									reportCount = 0;
								}
							}

if (firstDecParent.id !== checkedId) {
								checkedId = firstDecParent.id;
								reportCount = 0;
							}
						}
					}
				}

let shouldFix =
					varDeclParent &&
					// Don't do a fix unless all variables in the declarations are initialized (or it's in a for-in or for-of loop)
					(varDeclParent.parent.type === "ForInStatement" ||
						varDeclParent.parent.type === "ForOfStatement" ||
						varDeclParent.declarations.every(
							declaration => declaration.init,
						)) &&
					/*
					 * If options.destructuring is "all", then this warning will not occur unless
					 * every assignment in the destructuring should be const. In that case, it's safe
					 * to apply the fix.
					 */
					nodesToReport.length === nodes.length;

if (
					!isVarDecParentNull &&
					varDeclParent.declarations &&
					varDeclParent.declarations.length !== 1
				) {
					if (
						varDeclParent &&
						varDeclParent.declarations &&
						varDeclParent.declarations.length >= 1
					) {
						/*
						 * Add nodesToReport.length to a count, then comparing the count to the length
						 * of the declarations in the current block.
						 */

reportCount += nodesToReport.length;

let totalDeclarationsCount = 0;

varDeclParent.declarations.forEach(declaration => {
							if (declaration.id.type === "ObjectPattern") {
								totalDeclarationsCount +=
									declaration.id.properties.length;
							} else if (declaration.id.type === "ArrayPattern") {
								totalDeclarationsCount +=
									declaration.id.elements.length;
							} else {
								totalDeclarationsCount += 1;
							}
						});

shouldFix =
							shouldFix && reportCount === totalDeclarationsCount;
					}
				}

nodesToReport.forEach(node => {
					context.report({
						node,
						messageId: "useConst",
						data: node,
						fix: shouldFix
							? fixer => {
									const letKeywordToken =
										sourceCode.getFirstToken(
											varDeclParent,
											t => t.value === varDeclParent.kind,
										);

/**
									 * Extend the replacement range to the whole declaration,
									 * in order to prevent other fixes in the same pass
									 * https://github.com/eslint/eslint/issues/13899
									 */
									return new FixTracker(fixer, sourceCode)
										.retainRange(varDeclParent.range)
										.replaceTextRange(
											letKeywordToken.range,
											"const",
										);
								}
							: null,
					});
				});
			}
		}

return {
			"Program:exit"() {
				groupByDestructuring(variables, ignoreReadBeforeAssign).forEach(
					checkGroup,
				);
			},

VariableDeclaration(node) {
				if (node.kind === "let" && !isInitOfForStatement(node)) {
					variables.push(...sourceCode.getDeclaredVariables(node));
				}
			},
		};
	},
};

cmd: