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From: Fabian Marin on 27 Jul 2010 22:03
hope I did not misunderstand the question, but would this work??

%x{which $0}

It seems too easy to work so I probably missed something :P

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From: Hassan Schroeder on 27 Jul 2010 22:20
On Tue, Jul 27, 2010 at 7:03 PM, Fabian Marin <fmg134s(a)yahoo.com> wrote:
> hope I did not misunderstand the question, but would this work??
>
> %x{which $0}
>
> It seems too easy to work so I probably missed something :P

Thanks, but
$ irb
>> %x{which $0}
=> "/bin/sh\n"

isn't what I was looking for :-)

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Hassan Schroeder ------------------------ hassan.schroeder(a)gmail.com
twitter: @hassan

From: Edward Middleton on 27 Jul 2010 23:22
On 07/28/2010 11:20 AM, Hassan Schroeder wrote:
> On Tue, Jul 27, 2010 at 7:03 PM, Fabian Marin <fmg134s(a)yahoo.com> wrote:
>> hope I did not misunderstand the question, but would this work??
>>
>> %x{which $0}
>>
>> It seems too easy to work so I probably missed something :P
>
> Thanks, but
> $ irb
>>> %x{which $0}
> => "/bin/sh\n"
>
> isn't what I was looking for :-)

Thats because the $0 is being evaluated by the shell not ruby. What you
actually want is %x{which #{$0}} which will give "which irb" to the
shell. If the PATH environment is the same this should give you the
full path.

Edward

From: Fabian Marin on 28 Jul 2010 00:22
Edward Middleton wrote:
> On 07/28/2010 11:20 AM, Hassan Schroeder wrote:
>> => "/bin/sh\n"
>>
>> isn't what I was looking for :-)
>
> Thats because the $0 is being evaluated by the shell not ruby. What you
> actually want is %x{which #{$0}} which will give "which irb" to the
> shell. If the PATH environment is the same this should give you the
> full path.
>
> Edward

Yeah I missed that. I could not execute/test the code I suggested
because I'm using Win XP right now, sigh...

Edward, you're right. Once $0 is evaluated by Ruby that should work in
a Unix environment.
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From: Caleb Clausen on 28 Jul 2010 02:41
On 7/27/10, Fabian Marin <fmg134s(a)yahoo.com> wrote:
> Edward, you're right. Once $0 is evaluated by Ruby that should work in
> a Unix environment.

But watch:

$ ruby -e 'p $0'
"-e"

That doesn't seem to helpful. Hassan seemed to want the path to the
ruby interpreter, not the path to the ruby script it's executing.

Hassan, what is you objection to using rbconfig.rb as Joel suggests?
AFAIK, that's the best (only real) solution to this particular
problem.

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