Get names of all files from a folder with Ruby

Question

I want to get all file names from a folder using Ruby

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Dir new   home user foldername   each    file  puts file

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In an IRB context  you can use the following to get the files in the current directory   file names    ls  split   n     You can make this work on other directories too   file names    ls   Documents  split   n

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In Ruby 2 5 you can now use Dir children  It gets filenames as an array except for     and        Example   Dir children  testdir        gt    config h    main rb     http   ruby-doc org core-2 5 0 Dir html method-c-children

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If you want get an array of filenames including symlinks  use  Dir new   path to dir   entries reject    f  File directory  f     or even      Dir new   path to dir   reject    f  File directory  f     and if you want to go without symlinks  use  Dir new   path to dir   select    f  File file  f     As shown in other answers  use Dir glob   path to dir        instead of Dir new   path to dir   if you want to get all the files recursively

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def get path content dir    queue   Queue new   result        queue  lt  lt  dir   until queue empty      current   queue pop     Dir entries current  each    file        full name   File join current  file        if not  File directory  full name          result  lt  lt  full name       elsif file        and file                   queue  lt  lt  full name       end         end   result end   returns file s relative paths from directory and all subdirectories

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One simple way could be   dir          desired directory files   Dir glob File join dir              select  file  File file  file    files each do  f      puts f end

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You may also want to use Rake  FileList  provided you have rake dependency    FileList new  lib     do  file    p file end   According to the API      FileLists are lazy  When given a list of glob patterns for possible   files to be included in the file list  instead of searching the file   structures to find the files  a FileList holds the pattern for latter   use    https   docs ruby-lang org en 2 1 0 Rake FileList html

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Personally  I found this the most useful for looping over files in a folder  forward looking safety   Dir   etc path     each do  file name    next if File directory  file name  end

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This is what works for me   Dir entries dir  select    f  File file  File join dir  f       Dir entries returns an array of strings  Then  we have to provide a full path of the file to File file   unless dir is equal to our current working directory  That s why this File join

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This works for me   If you don t want hidden files 1   use Dir       With a relative path  Dir   will return relative paths    as       myfile            Dir          select   f  File file  f       Want just the filename    as     myfile           Dir           select   f  File file  f   map   f  File basename f      Turn them into absolute paths        path to myfile           Dir           select   f  File file  f   map   f  File absolute path f      With an absolute path  Dir   will return absolute paths    as      home    home test myfile           Dir    home    home test      select   f  File file  f      Need the paths to be canonical    as      home test myfile           Dir    home    home test      select   f  File file  f   map   f  File expand path f     Now  Dir entries will return hidden files  and you don t need the wildcard asterix  you can just pass the variable with the directory name   but it will return the basename directly  so the File xxx functions won t work     In the current working dir    Dir entries        select   f  File file  f      In another directory  relative or otherwise  you need to transform the path    so it is either absolute  or relative to the current working dir to call File xxx functions    home     home test  Dir entries  home   select   f  File file  File join  home  f        1   dotfile on unix  I don t know about Windows

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While getting all the file names in a directory  this snippet can be used to reject both directories         and hidden files which start with a    files   Dir entries  your folder   reject   f  File directory  f     f 0  include

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Dir entries folder    example   Dir entries        Source  http   ruby-doc org core classes Dir html method-c-entries

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This is a solution to find files in a directory   files   Dir   work myfolder      txt    files each do  file name    if  File directory  file name     puts file name     File open file name  do  file        file each line do  line          if line     banco1            puts  Found    line           end       end     end   end end

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this code returns only filenames with their extension  without a global path   Dir children   path to search

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To get all files  strictly files only  recursively  Dir glob  path        select    e  File file  e    Or anything that s not a directory  File file  would reject non-regular files   Dir glob  path        reject    e  File directory  e    Alternative Solution Using Find find over a pattern-based lookup method like Dir glob is actually better   See this answer to  quot One-liner to Recursively List Directories in Ruby  quot

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In addition to the suggestions in this thread  I wanted to mention that if you need to return dot files as well   gitignore  etc   with Dir glob you would need to include a flag as so   Dir glob   path to dir     File  FNM DOTMATCH  By default  Dir entries includes dot files  as well as current a parent directories   For anyone interested  I was curious how the answers here compared to each other in execution time  here was the results against deeply nested hierarchy  The first three results are non-recursive          user     system      total        real Dir      34900 files stepped over 100 iterations    0 110729   0 139060   0 249789    0 249961  Dir glob      34900 files stepped over 100 iterations    0 112104   0 142498   0 254602    0 254902  Dir entries     35600 files stepped over 100 iterations    0 142441   0 149306   0 291747    0 291998  Dir         2211600 files stepped over 100 iterations    9 399860  15 802976  25 202836   25 250166  Dir glob         2211600 files stepped over 100 iterations    9 335318  15 657782  24 993100   25 006243  Dir entries   recursive walk   2705500 files stepped over 100 iterations   14 653018  18 602017  33 255035   33 268056  Dir glob       File  FNM DOTMATCH    2705500 files stepped over 100 iterations   12 178823  19 577409  31 756232   31 767093    These were generated with the following benchmarking script   require  benchmark  base dir     path to dir   n   100 Benchmark bm do  x    x report  Dir       do     i   0     n times do       i   i   Dir    base dir     select   f   File directory  f  length     end     puts      i  files stepped over   n  iterations     end   x report  Dir glob       do     i   0     n times do       i   i   Dir glob    base dir      select   f   File directory  f  length     end     puts      i  files stepped over   n  iterations     end   x report  Dir entries      do     i   0     n times do       i   i   Dir entries base dir  select   f   File directory  File join base dir  f   length     end     puts      i  files stepped over   n  iterations     end   x report  Dir          do     i   0     n times do       i   i   Dir    base dir        select   f   File directory  f  length     end     puts      i  files stepped over   n  iterations     end   x report  Dir glob          do     i   0     n times do       i   i   Dir glob    base dir        select   f   File directory  f  length     end     puts      i  files stepped over   n  iterations     end   x report  Dir entries   recursive walk    do     i   0     n times do       def walk dir dir  result          Dir entries dir  each do  file            next if file            file                   path   File join dir  file            if Dir exist  path              walk dir path  result            else             result  lt  lt  file           end         end       end       result   Array new       walk dir base dir  result        i   i   result length     end     puts      i  files stepped over   n  iterations     end   x report  Dir glob       File  FNM DOTMATCH     do     i   0     n times do       i   i   Dir glob    base dir        File  FNM DOTMATCH  select   f   File directory  f  length     end     puts      i  files stepped over   n  iterations     end end   The differences in file counts are due to Dir entries including hidden files by default  Dir entries ended up taking a bit longer in this case due to needing to rebuild the absolute path of the file to determine if a file was a directory  but even without that it was still taking consistently longer than the other options in the recursive case  This was all using ruby 2 5 1 on OSX

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You also have the shortcut option of   Dir   path to search       and if you want to find all Ruby files in any folder or sub-folder    Dir   path to search      rb

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When loading all names of files in the operating directory you can use Dir glob  quot    This will return all files within the context that the application is running in  Note for Rails this is the top level directory of the application  You can do additional matching and recursive searching found here https   ruby-doc org core-2 7 1 Dir html method-c-glob

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The following snippets exactly shows the name of the files inside a directory  skipping subdirectories and  quot   quot    quot    quot  dotted folders  Dir entries  quot your folder quot   select    f  File file  File join  quot your folder quot   f

[ruby] Get names of all files from a folder with Ruby

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