als-file-list/dest/file-list-sync.js

Generates filtered and sorted list of all file paths in a directory and its subdirectories.

const fs = require('fs');
const path = require('path');
const {checkWhere,sortAndSelect,validateOptions,addError,notExistsSync} = require('./utils')

async function fileList(dirPath,options={}, errors = []) {
   let { level, where, select,limit,skip,sort } = validateOptions(dirPath,options)
   if(await notExistsSync(dirPath,errors)) return []
   let n = 0, skiped = 0;

   let result = [];
   if(select !== undefined) select = select.trim().split(' ').filter(s => s !== '')

   function readFiles(basePath, curLevel = 0) {
      if(n >= limit) return
      const files = fs.readdirSync(basePath);
      for (const file of files) {
         const currentPath = path.join(basePath, file);
         const relativePath = path.relative(dirPath, currentPath).replace(/\\/g, '/');
         try {
            const stats = fs.statSync(currentPath)
            const isDir = stats.isDirectory()
            if(!checkWhere(where, relativePath, stats, isDir, errors)) continue
            if (isDir) {
               if(curLevel < level) readFiles(currentPath, curLevel + 1);
            } else if(!sort) {
               if(skiped < skip) skiped++
               else if(n <= limit) {
                  result.push({relativePath,stats});
                  n++
               } 
            } else result.push({relativePath,stats});
         } catch (error) { addError(error, { relativePath }, errors) }
      }
   }
   readFiles(dirPath);
   return sortAndSelect(sort,result,skip,limit,select)
}

module.exports = fileList