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👻 Find dead code, dead imports, and dead dependencies before they haunt your project
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JavaScript
;
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
var desc = Object.getOwnPropertyDescriptor(m, k);
if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
desc = { enumerable: true, get: function() { return m[k]; } };
}
Object.defineProperty(o, k2, desc);
}) : (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
o["default"] = v;
});
var __importStar = (this && this.__importStar) || (function () {
var ownKeys = function(o) {
ownKeys = Object.getOwnPropertyNames || function (o) {
var ar = [];
for (var k in o) if (Object.prototype.hasOwnProperty.call(o, k)) ar[ar.length] = k;
return ar;
};
return ownKeys(o);
};
return function (mod) {
if (mod && mod.__esModule) return mod;
var result = {};
if (mod != null) for (var k = ownKeys(mod), i = 0; i < k.length; i++) if (k[i] !== "default") __createBinding(result, mod, k[i]);
__setModuleDefault(result, mod);
return result;
};
})();
Object.defineProperty(exports, "__esModule", { value: true });
exports.analyzeUnusedFunctions = analyzeUnusedFunctions;
const fs = __importStar(require("node:fs"));
const ts = __importStar(require("typescript"));
const fs_1 = require("../utils/fs");
const tsparser_1 = require("../utils/tsparser");
/**
* Analyze all files for unused functions
*/
async function analyzeUnusedFunctions(files) {
const unusedFunctions = [];
for (const file of files) {
const sourceFile = (0, tsparser_1.parseFile)(file);
if (!sourceFile)
continue;
const fileContent = fs.readFileSync(file, 'utf-8');
const functions = [];
const usages = [];
function visit(node) {
// 1. Detect Function Declarations
if (ts.isFunctionDeclaration(node) && node.name) {
const isExported = node.modifiers?.some((m) => m.kind === ts.SyntaxKind.ExportKeyword) || false;
if (!sourceFile)
return;
const { line, column } = (0, tsparser_1.getLineAndColumn)(sourceFile, node.name.getStart());
if (!(0, fs_1.hasIgnoreComment)(fileContent, line)) {
functions.push({
name: node.name.text,
start: node.getStart(),
end: node.getEnd(),
line,
column,
type: 'function',
isExported,
entireLine: (0, tsparser_1.getLineText)(sourceFile, line),
});
}
}
// 2. Detect Arrow Functions / Function Expressions in Variables
if (ts.isVariableDeclaration(node) &&
node.name &&
ts.isIdentifier(node.name) &&
node.initializer) {
if (ts.isArrowFunction(node.initializer) || ts.isFunctionExpression(node.initializer)) {
// Check if exported (need to check parent VariableStatement)
let isExported = false;
let current = node.parent;
while (current) {
if (ts.isVariableStatement(current)) {
isExported =
current.modifiers?.some((m) => m.kind === ts.SyntaxKind.ExportKeyword) || false;
break;
}
current = current.parent;
}
if (!sourceFile)
return;
const { line, column } = (0, tsparser_1.getLineAndColumn)(sourceFile, node.name.getStart());
if (!(0, fs_1.hasIgnoreComment)(fileContent, line)) {
functions.push({
name: node.name.text,
start: node.getStart(),
end: node.getEnd(),
line,
column,
type: 'arrow',
isExported,
entireLine: (0, tsparser_1.getLineText)(sourceFile, line),
});
}
}
}
// 3. Detect Usages (Identifiers)
if (ts.isIdentifier(node)) {
if (isUsage(node)) {
usages.push({ name: node.text, pos: node.getStart() });
}
}
ts.forEachChild(node, visit);
}
visit(sourceFile);
// Analyze
for (const func of functions) {
if (func.isExported)
continue; // Skip exported functions (handled by unusedExports)
// Check for usages outside the function itself (handles simple recursion)
const isUsed = usages.some((u) => u.name === func.name && (u.pos < func.start || u.pos > func.end));
if (!isUsed) {
unusedFunctions.push({
file,
line: func.line,
column: func.column,
functionName: func.name,
functionType: func.type,
isExported: false,
entireLine: func.entireLine,
});
}
}
}
return unusedFunctions;
}
/**
* Check if an identifier is a usage (reference) rather than a declaration
*/
function isUsage(node) {
const parent = node.parent;
// Declarations
if (ts.isFunctionDeclaration(parent) && parent.name === node)
return false;
if (ts.isVariableDeclaration(parent) && parent.name === node)
return false;
if (ts.isClassDeclaration(parent) && parent.name === node)
return false;
if (ts.isInterfaceDeclaration(parent) && parent.name === node)
return false;
if (ts.isTypeAliasDeclaration(parent) && parent.name === node)
return false;
if (ts.isEnumDeclaration(parent) && parent.name === node)
return false;
if (ts.isParameter(parent) && parent.name === node)
return false;
if (ts.isMethodDeclaration(parent) && parent.name === node)
return false;
// Property access: obj.prop -> prop is not a usage of variable 'prop'
if (ts.isPropertyAccessExpression(parent) && parent.name === node)
return false;
// Property assignment: { prop: val } -> prop is not a usage
if (ts.isPropertyAssignment(parent) && parent.name === node)
return false;
// Import/Export specifiers
if (ts.isImportSpecifier(parent) && (parent.propertyName === node || parent.name === node))
return false;
if (ts.isExportSpecifier(parent) && (parent.propertyName === node || parent.name === node))
return false;
// Binding elements (destructuring): const { prop } = obj
if (ts.isBindingElement(parent) && parent.propertyName === node)
return false; // { prop: alias } -> prop is property name
if (ts.isBindingElement(parent) && parent.name === node)
return false; // { prop } -> prop is declaration
return true;
}
//# sourceMappingURL=unusedFunctions.js.map