Ruby require error cannot load such file

Question

I ve one file  main rb with the following content   require  tokenizer rb    The tokenizer rb file is in the same directory and its content is   class Tokenizer     def self tokenize string          return string split          end end   If i try to run main rb I get the following error   C  Documents and Settings my src folder gt ruby main rb  C  Ruby193 lib ruby 1 9 1 rubygems custom require rb 36 in  require   cannot load such file -- tokenizer rb  LoadError          from C  Ruby193 lib ruby 1 9 1 rubygems custom require rb 36 in  require           from main rb 1 in   lt main gt     I just noticed that if I use load instead of require everything works fine  What may the problem be here

User · Answer

This will work nicely if it is in a gem lib directory and this is the tokenizer rb      require relative  tokenizer main

User · Answer

require loads a file from the  LOAD PATH  If you want to require a file relative to the currently executing file instead of from the  LOAD PATH  use require relative

User · Answer

you need to give the path  Atleast you should give the path from the current directory  It will work for sure    filename

User · Answer

First      sudo gem install colored2   And you should input your password   Then      sudo gem update --system     Appear Updating rubygems-update ERROR   While executing gem      OpenSSL  SSL  SSLError      hostname  gems ruby-china org  does not match the server certificate  Then      rvm -v   rvm get head   Last What language do you want to use     Swift   ObjC       ObjC   Would you like to include a demo application with your library    Yes   No       Yes   Which testing frameworks will you use    Specta   Kiwi   None       None   Would you like to do view based testing    Yes   No       No   What is your class prefix      XMG   Running pod install on your new library

User · Answer

Just do this   require relative  tokenizer    If you put this in a Ruby file that is in the same directory as tokenizer rb  it will work fine no matter what your current working directory  CWD  is   Explanation of why this is the best way  The other answers claim you should use require    tokenizer   but that is the wrong answer  because it will only work if you run your Ruby process in the same directory that tokenizer rb is in   Pretty much the only reason to consider using require like that would be if you need to support Ruby 1 8  which doesn t have require relative   The require    tokenizer  answer might work for you today  but it unnecessarily limits the ways in which you can run your Ruby code   Tomorrow  if you want to move your files to a different directory  or just want to start your Ruby process from a different directory  you ll have to rethink all of those require statements   Using require to access files that are on the load path is a fine thing and Ruby gems do it all the time   But you shouldn t start the argument to require with a   unless you are doing something very special and know what you are doing   When you write code that makes assumptions about its environment  you should think carefully about what assumptions to make   In this case  there are up to three different ways to require the tokenizer file  and each makes a different assumption    require relative  path to tokenizer    Assumes that the relative path between the two Ruby source files will stay the same  require  path to tokenizer   Assumes that path to tokenizer is inside one of the directories on the load path   LOAD PATH    This generally requires extra setup  since you have to add something to the load path  require    path to tokenizer   Assumes that the relative path from the Ruby process s current working directory to tokenizer rb is going to stay the same    I think that for most people and most situations  the assumptions made in options  1 and  2 are more likely to hold true over time

User · Answer

I just tried and it works with require    tokenizer   Hope this helps

User · Answer

I used jruby-1 7 4 to compile my ruby code    require  roman-numerals rb     is the code which threw the below error    LoadError  no such file to load -- roman-numerals   require at org jruby RubyKernel java 1054   require at  Users amanoharan  rvm rubies jruby-1 7 4 lib ruby shared rubygems custom require rb 36     root  at  Users amanoharan Documents Aptana Studio 3 Workspace RubyApplication RubyApplication1 Ruby2 rb 2   I removed rb from require and gave   require  roman-numerals     It worked fine

User · Answer

Ruby 1 9 has removed the current directory from the load path  and so you will need to do a relative require on this file  as David Grayson says   require relative  tokenizer    There s no need to suffix it with  rb  as Ruby s smart enough to know that s what you mean anyway

User · Answer

What about including the current directory in the search path   ruby -I  main rb

User · Answer

Another nice little method is to include the current directory in your load path with     unshift        You could push it onto the      LOAD PATH  array but unshift will force it to load your current working directory before the rest of the load path   Once you ve added your current directory in your load path you don t need to keep specifying   require    tokenizer     and can just go back to using   require  tokenizer

User · Answer

For those who are absolutely sure their relative path is correct  my problem was that my files did not have the  rb extension   Even though I used RubyMine to create the files and selected that they were Ruby files on creation    Double check the file extensions on your file

User · Answer

The problem is that require does not load from the current directory  This is what I thought  too but then I found this thread  For example I tried the following code   irb gt  f   File new  blabla rb     gt    lt File blabla rb gt  irb gt  f read   gt   class Tokenizer n    def self tokenize string  n        return string split         n    end nend n  irb gt  require f LoadError  cannot load such file -- blabla rb         from D  dev Ruby193 lib ruby 1 9 1 rubygems custom require rb 36 in  req uire          from D  dev Ruby193 lib ruby 1 9 1 rubygems custom require rb 36 in  req uire          from  irb  24         from D  dev Ruby193 bin irb 12 in   lt main gt     As it can be seen it read the file ok  but I could not require it  the path was not recognized   and here goes code that works   irb f   File new  D   blabla rb     gt    lt File D   blabla rb gt  irb f read   gt   class Tokenizer n    def self tokenize string  n        return string split         n    end nend n  irb gt  require f   gt  true   As you can see if you specify the full path the file loads correctly

User · Answer

I would recommend   load    tokenizer rb    Given  that you know the file is in the same working directory   If you re trying to require it relative to the file  you can use  require relative  tokenizer    I hope this helps

[ruby] Ruby 'require' error: cannot load such file

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