error while installing jruby using rvm

Question

I can install jruby on cygwin using rvm, but the jruby gems do not get installed and any attempt to install gem fails.

This is the error I get during installation of jruby, when rvm tries to install default gemset:

Building Nailgun  
jruby-1.6.7 - #installing to /home/salil.wadnerkar/.rvm/rubies/jruby-1.6.7  
jruby-1.6.7 - #importing default gemsets (/home/salil.wadnerkar/.rvm/gemsets/)  
Copying across included gems  
cygpath: can't convert empty path  
Error opening script file: C:/cygwin/home/salil.wadnerkar/.rvm/src/jruby-1.6.7/tool/nailgun/home/salil.wadnerkar/.rvm/rubies/jruby-1.6.7/bin/gem (The system cannot find the path specified)

Any further attempt to install any gem meets with a similar error:

$ which gem  
/home/salil.wadnerkar/.rvm/rubies/jruby-1.6.7/bin/gem  

$ gem install rake  
cygpath: can't convert empty path  
Fetching: rake-0.9.2.2.gem (100%)  
ERROR:  While executing gem ... (Errno::ENOENT)  
    No such file or directory - C:/home/salil.wadnerkar/.rvm/gems/jruby-1.6.7/cache/rake-0.9.2.2.gem  

Update:

Here is my gem env

$ gem env  
cygpath: can't convert empty path  
RubyGems Environment:  
  - RUBYGEMS VERSION: 1.8.15  
  - RUBY VERSION: 1.9.2 (2012-02-22 patchlevel 312) [java]  
  - INSTALLATION DIRECTORY: /home/salil.wadnerkar/.rvm/gems/jruby-1.6.7  
  - RUBY EXECUTABLE: C:/cygwin/home/salil.wadnerkar/.rvm/rubies/jruby-1.6.7/bin/  
jruby.exe  
  - EXECUTABLE DIRECTORY: /home/salil.wadnerkar/.rvm/gems/jruby-1.6.7/bin  
  - RUBYGEMS PLATFORMS:  
    - ruby  
    - universal-java-1.7  
  - GEM PATHS:  
     - /home/salil.wadnerkar/.rvm/gems/jruby-1.6.7  
     - /home/salil.wadnerkar/.rvm/gems/jruby-1.6.7:/home/salil.wadnerkar/.rvm/ge  
ms/jruby-1.6.7@global  
  - GEM CONFIGURATION:  
     - :update_sources => true  
     - :verbose => true  
     - :benchmark => false  
     - :backtrace => false  
     - :bulk_threshold => 1000  
     - "install" => "--no-rdoc --no-ri --env-shebang"  
     - "update" => "--no-rdoc --no-ri --env-shebang"  
  - REMOTE SOURCES:  
     - http://rubygems.org/  

Edit:

Here is my rvm info

$ rvm info  

jruby-1.6.7:  

  system:  
    uname:       "CYGWIN_NT-6.1 got002518 1.7.11(0.260/5/3) 2012-02-24 14:05 i686 Cygwin"  
    bash:        "/usr/bin/bash => GNU bash, version 4.1.10(4)-release (i686-pc-cygwin)"  
    zsh:         " => not installed"  

  rvm:  
    version:      "rvm 1.10.3 by Wayne E. Seguin <wayneeseguin@gmail.com>, Michal Papis <mpapis@gmail.com> [https://rvm.beginrescueend.com/]"  
    updated:      "18 hours 30 minutes 15 seconds ago"  
cygpath: can't convert empty path  

  ruby:  
    interpreter:  "jruby"  
    version:      "1.6.7"  
    date:         "2012-02-22"  
    platform:     "Windows 7-x86-java"  
    patchlevel:   "TM"  
    full_version: "jruby 1.6.7 (ruby-1.9.2-p312) (2012-02-22 3e82bc8) (Java HotS"ot(TM) Client VM 1.7.0_03) [Windows 7-x86-java]  

  homes:  
    gem:          "/home/salil.wadnerkar/.rvm/gems/jruby-1.6.7"  
    ruby:         "/home/salil.wadnerkar/.rvm/rubies/jruby-1.6.7"  

  binaries:  
    ruby:         "/home/salil.wadnerkar/.rvm/rubies/jruby-1.6.7/bin/ruby"  
    irb:          "/home/salil.wadnerkar/.rvm/rubies/jruby-1.6.7/bin/irb"  
    gem:          "/home/salil.wadnerkar/.rvm/rubies/jruby-1.6.7/bin/gem"  
    rake:         "/home/salil.wadnerkar/.rvm/rubies/jruby-1.6.7/bin/rake"  

  environment:  
    PATH:         "/home/salil.wadnerkar/.rvm/gems/jruby-1.6.7/bin:/home/salil.wadnerkar/.rvm/gems/jruby-1.6.7@global/bin:/home/salil.wadnerkar/.rvm/rubies/jruby-1.6.7/bin:/home/salil.wadnerkar/.rvm/bin:/usr/local/bin:/usr/bin:/cygdrive/c/Users/salilw_adm/AppData/Roaming/cabal/bin:/cygdrive/c/Program Files/Common Files/Microsoft Shared/Windows Live:/cygdrive/c/Windows/system32:/cygdrive/c/Windows:/cygdrive/c/Windows/System32/Wbem:/cygdrive/c/Windows/System32/WindowsPowerShell/v1.0:/cygdrive/c/Program Files/Hummingbird/Connectivity/14.00/Accessories:/cygdrive/c/Program Files/Hummingbird/Connectivity/14.00/NFS Maestro:/cygdrive/c/Program Files/WindowsLive/Shared:/cygdrive/c/Program Files/Java/jdk1.7.0_03/bin:/cygdrive/c/Python27:/cygdrive/c/Python27/Scripts:/cygdrive/c/Program Files/QuickTi  
me/QTSystem:/cygdrive/c/Program Files/Subversion/bin:/cygdrive/c/apache-ant-1.8.2/bin:/cygdrive/c/Ruby192/bin:/cygdrive/c/Users/salil.wadnerkar/AppData/Roaming/cabal/bin"  
    GEM_HOME:     "/home/salil.wadnerkar/.rvm/gems/jruby-1.6.7"  
    GEM_PATH:     "/home/salil.wadnerkar/.rvm/gems/jruby-1.6.7:/home/salil.wadnerkar/.rvm/gems/jruby-1.6.7@global"  
    MY_RUBY_HOME: "/home/salil.wadnerkar/.rvm/rubies/jruby-1.6.7"  
    IRBRC:        "/home/salil.wadnerkar/.rvm/rubies/jruby-1.6.7/.irbrc"  
    RUBYOPT:      ""  
    gemset:       ""  

I think it has to do something with the way cygwin is using GEMPATH.

$ gem install bundler  
cygpath: can't convert empty path  
Fetching: bundler-1.0.22.gem (100%)  
ERROR:  While executing gem ... (Errno::ENOENT)  
    No such file or directory - C:/home/salil.wadnerkar/.rvm/gems/jruby-1.6.7/ca  
che/bundler-1.0.22.gem  

$ echo $GEM_PATH  
/home/salil.wadnerkar/.rvm/gems/jruby-1.6.7:/home/salil.wadnerkar/.rvm/gems/jrub  
y-1.6.7@global  

While installing a gem, gem is trying to use Windows-style path. In fact, I have to manually create the gem cache directory because it is using the windows style path and could not find the gem cache directory for gem installation.

Edit: rvm seems to correctly add its path at the front of PATH.

$ echo $PATH  
/home/salil.wadnerkar/.rvm/gems/jruby-1.6.7/bin:/home/salil.wadnerkar/.rvm/gems/jruby-  1.6.7@global/bin:/home/salil.wadnerkar/.rvm/rubies/jruby-1.6.7/bin:/home/salil.wadnerkar/.rvm/bin:/usr/local/bin:/usr/bin:.....  

Edit:

Here is the output of the debug command. I am going to put 'cygpath' in there somewhere to see whether it fixes the path interpretation.

$ gem install rake --debug  
cygpath: can't convert empty path  
ERROR:  While executing gem ... (Errno::ENOENT)  
No such file or directory - C:/home/salil.wadnerkar/.rvm/gems/jruby-1.6.7/cache/rake-0.9.2.2.gem  
    org/jruby/RubyFile.java:465:in `initialize'  
    org/jruby/RubyIO.java:1135:in `open'  
    C:/cygwin/home/salil.wadnerkar/.rvm/rubies/jruby-1.6.7/lib/ruby/site_ruby/1.8/rubygems/remote_fetcher.rb:152:in `download'  
    C:/cygwin/home/salil.wadnerkar/.rvm/rubies/jruby-1.6.7/lib/ruby/site_ruby/1.8/rubygems/dependency_installer.rb:278:in `install'  
    org/jruby/RubyArray.java:1615:in `each'  
    org/jruby/RubyEnumerable.java:956:in `each_with_index'  
    C:/cygwin/home/salil.wadnerkar/.rvm/rubies/jruby-1.6.7/lib/ruby/site_ruby/1.8/rubygems/dependency_installer.rb:270:in `install'  
    C:/cygwin/home/salil.wadnerkar/.rvm/rubies/jruby-1.6.7/lib/ruby/site_ruby/1.8/rubygems/commands/install_command.rb:121:in `execute'  
    org/jruby/RubyArray.java:1615:in `each'  
    C:/cygwin/home/salil.wadnerkar/.rvm/rubies/jruby-1.6.7/lib/ruby/site_ruby/1.8/rubygems/commands/install_command.rb:115:in `execute'  
    C:/cygwin/home/salil.wadnerkar/.rvm/rubies/jruby-1.6.7/lib/ruby/site_ruby/1.8/rubygems/command.rb:278:in `invoke'  
    C:/cygwin/home/salil.wadnerkar/.rvm/rubies/jruby-1.6.7/lib/ruby/site_ruby/1.8/rubygems/command_manager.rb:147:in `process_args'  
    C:/cygwin/home/salil.wadnerkar/.rvm/rubies/jruby-1.6.7/lib/ruby/site_ruby/1.8/rubygems/command_manager.rb:117:in `run'  
    C:/cygwin/home/salil.wadnerkar/.rvm/rubies/jruby-1.6.7/lib/ruby/site_ruby/1.8/rubygems/gem_runner.rb:65:in `run'  
    C:\cygwin\home\salil.wadnerkar\.rvm\rubies\jruby-1.6.7\bin\jgem:25:in `(root)'  
Exception `Gem::SystemExitException' at C:/cygwin/home/salil.wadnerkar/.rvm/rubies/jruby-1.6.7/lib/ruby/site_ruby/1.8/rubygems/user_interaction.rb:332 - Exiting RubyGems with exit_code 1  

Answer 1

Further to my previous post - I overcame the issues by building jruby from source via Ant build as mentioned within the README in jruby source bundle. Hope this helps.

Answer 2

I faced similar issues. I tried everything possible including reinstalling Cygwin. Finally I overcame the issues by building jruby from source.

Answer 3

Error opening script file: C:/cygwin/home/salil.wadnerkar/.rvm/src/jruby-1.6.7/tool/nailgun/home/salil.wadnerkar/.rvm/rubies/jruby-1.6.7/bin/gem (The system cannot find the path specified)

The path format is your problem. Cygwin doesn't (and shouldn't) recognize paths like that. This same path should have been:

/home/salil.wadnerkar/.rvm/src/jruby-1.6.7/tool/nailgun/home/salil.wadnerkar/.rvm/rubies/jruby-1.6.7/bin/gem

Your problem boils down to this -- a tool which is very important for Cygwin, is overriden by another tool with the same name in your PATH system variable, and that tool is located in a directory which is before your Cygwin binary path.

(I had a similar problem when I tried to compile native gems, but I had Windows version of GCC in my PATH and it was before the Cygwin binary path).

A very quick solution would be to edit your system PATH environment variable and make sure your Cygwin binary path is the first entry there, something like this:

PATH = C:\cygwin\bin;C:\your\other\paths;C:\windows\system32;...

etc.

Of course, exit all your Cygwin consoles and stop any Cygwin program that might still be running, then start consoles/other programs again. Everything should be just fine.

I hope this helps you.