From: Phrogz <gavin@...>
Date: 2007-03-23T07:50:05+09:00
Subject: Re: Rake bug on Windows

On Mar 22, 3:38 pm, "S. Robert James" <srobertja...@gmail.com> wrote:
> Rake returns 0 exit status on Windows, even after failure.

Not really. It appears that the problem is with the rake.bat batch
file that is used on Windows. Pared down, it looks something like
this:

  "%~d0%~p0ruby" -x "%~f0" %*
  goto endofruby
  #!/bin/ruby

  require 'rubygems'
  require 'rake'
  load 'rake'

  __END__
  :endofruby

The problem is that the batch file doesn't seem to properly pass along
the exit code in a way that causes Windows to do the right thing if
you perform a goto in the batch file. Here's a simple test case:

  C:\>type tmp1.bat
  @echo off
  ruby -e "puts 'failing...'; exit(1)"

  C:\>tmp1.bat && echo "success"
  failing...

  C:\>type tmp2.bat
  @echo off
  ruby -e "puts 'failing...'; exit(1)"
  goto alldone
  :alldone
  echo The error level is %ERRORLEVEL%

  C:\>tmp2.bat && echo "success"
  failing...
  The error level is 1
  "success"

I hoped maybe I could fix this by really truly having the batch file
return the right error code, but no such luck:
  C:\>exit /?
  Quits the CMD.EXE program (command interpreter) or the current
  batch script.

    EXIT [/B] [exitCode]

    /B        specifies to exit the current batch script instead of
              CMD.EXE.  If executed from outside a batch script, it
              will quit CMD.EXE

    exitCode  specifies a numeric number.  if /B is specified, sets
              ERRORLEVEL that number.  If quitting CMD.EXE, sets the
process
              exit code with that number.

  C:\>type tmp3.bat
  @echo off
  ruby -e "puts 'failing...'; exit(1)"
  goto alldone
  :alldone
  echo The error level is %ERRORLEVEL%
  EXIT /B %ERRORLEVEL%

  C:\>tmp3.bat && echo "success"
  failing...
  The error level is 1
  "success"

If this is important, you could modify the rake.bat file on Windows
(in c:\ruby\bin) to have it not use the trick ruby -x option, and
instead just use -e instead. Something like:

  C:\>type \ruby\bin\rake.bat
  @"%~d0%~p0ruby" -e "require 'rubygems'; require 'rake'; load 'rake'"
%*

  C:\>rake && echo "success"
  rake aborted!
  No Rakefile found (looking for: rakefile, Rakefile, rakefile.rb,
Rakefile.rb)
  c:/ruby/lib/ruby/gems/1.8/gems/rake-0.7.2/lib/rake.rb:1849:in
`load_rakefile'
  (See full trace by running task with --trace)