agentsqripts/lib/wet-code/ast/refactoring/findCommonDirectory.js

Comprehensive static code analysis toolkit for identifying technical debt, security vulnerabilities, performance issues, and code quality problems

/**
 * @file Find common directory path
 * @description Single responsibility: Determine shared parent directory
 */

const path = require('path');

function findCommonDirectory(directories) {
  if (!directories || directories.length === 0) return '.';
  if (directories.length === 1) return directories[0];
  
  // Split all paths into segments
  const pathSegments = directories.map(dir => dir.split(path.sep));
  
  // Find common segments
  const commonSegments = [];
  const minLength = Math.min(...pathSegments.map(s => s.length));
  
  for (let i = 0; i < minLength; i++) {
    const segment = pathSegments[0][i];
    if (pathSegments.every(segments => segments[i] === segment)) {
      commonSegments.push(segment);
    } else {
      break;
    }
  }
  
  return commonSegments.length > 0 ? commonSegments.join(path.sep) : '.';
}

module.exports = findCommonDirectory;