Which Ruby is in use?
in [Ruby]
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From: Hassan Schroeder on 27 Jul 2010 16:26 Is there a way to tell from within a program which executable is being used -- which executable, not the version -- to run it? Seems like there should be, but I'm striking out... TIA, -- Hassan Schroeder ------------------------ hassan.schroeder(a)gmail.com twitter: @hassan
From: Joseph E. Savard on 27 Jul 2010 17:20 The best way is to check your path or your #! Line.... From IRB: ruby-1.9.2-head > RUBY_VERSION => "1.9.2" ruby-1.9.2-head > RUBY_PLATFORM => "i386-darwin9.8.0" ruby-1.9.2-head > RUBY_RELEASE_DATE => "2010-07-14" ruby-1.9.2-head > RUBY_PATCHLEVEL => -1 ruby-1.9.2-head > HERE's the money shot! FROM A RUBY PROGRAM: [args.rb] puts "The name of the progrma laucnhed is #{$0} OR #{$PROGRAM_NAME}" ARGV.each do|a| puts "Argument: #{a}" end puts "And finally the ruby executable #{ENV['_']}" <MANISH:jes> [07-27 16:17] 0 529:29 (14.35 Mb) ~ ! irb args.rb a s d ruby-1.9.2-head > ruby-1.9.2-head > puts "The name of the progrma laucnhed is #{$0} OR #{$PROGRAM_NAME}" The name of the progrma laucnhed is args.rb OR args.rb => nil ruby-1.9.2-head > ARGV.each do|a| ruby-1.9.2-head > ruby-1.9.2-head > puts "Argument: #{a}" ruby-1.9.2-head ?> end Argument: a Argument: s Argument: d => ["a", "s", "d"] ruby-1.9.2-head > ruby-1.9.2-head > puts "And finally the ruby executable #{ENV['_']}" And finally the ruby executable /Users/jes/.rvm/rubies/ruby-1.9.2-head/bin/irb => nil ruby-1.9.2-head > OR RBCONFIG if you like: ruby-1.9.2-head > require "rbconfig" => false ruby-1.9.2-head > puts File.join(Config::CONFIG["bindir"], Config::CONFIG["ruby_install_name"]) /Users/jes/.rvm/rubies/ruby-1.9.2-head/bin/ruby => nil ruby-1.9.2-head > Make sense? > From: Hassan Schroeder <hassan.schroeder(a)gmail.com> > Reply-To: <ruby-talk(a)ruby-lang.org> > Date: Wed, 28 Jul 2010 05:26:42 +0900 > To: ruby-talk ML <ruby-talk(a)ruby-lang.org> > Subject: Which Ruby is in use? > > Is there a way to tell from within a program which executable is being > used -- which executable, not the version -- to run it? > > Seems like there should be, but I'm striking out... > > TIA, > -- > Hassan Schroeder ------------------------ hassan.schroeder(a)gmail.com > twitter: @hassan >
From: Joseph E. Savard on 27 Jul 2010 17:24 In 1.9: RUBY_COPYRIGHT RUBY_DESCRIPTION String Version number 1.9 & interpreter arch. RUBY_ENGINE String The name of the Ruby interpreter RUBY_PATCHLEVEL RUBY_PLATFORM Results in irb: ruby-1.9.2-head > RUBY_COPYRIGHT => "ruby - Copyright (C) 1993-2010 Yukihiro Matsumoto" ruby-1.9.2-head > RUBY_DESCRIPTION => "ruby 1.9.2dev (2010-07-14 revision 28640) [i386-darwin9.8.0]" ruby-1.9.2-head > RUBY_ENGINE => "ruby" ruby-1.9.2-head > RUBY_PATCHLEVEL => -1 ruby-1.9.2-head > RUBY_PLATFORM => "i386-darwin9.8.0" ruby-1.9.2-head > Lots of ways to skin the cat. > From: Hassan Schroeder <hassan.schroeder(a)gmail.com> > Reply-To: <ruby-talk(a)ruby-lang.org> > Date: Wed, 28 Jul 2010 05:26:42 +0900 > To: ruby-talk ML <ruby-talk(a)ruby-lang.org> > Subject: Which Ruby is in use? > > Is there a way to tell from within a program which executable is being > used -- which executable, not the version -- to run it? > > Seems like there should be, but I'm striking out... > > TIA, > -- > Hassan Schroeder ------------------------ hassan.schroeder(a)gmail.com > twitter: @hassan > RUBY_COPYRIGHT RUBY_DESCRIPTION RUBY_ENGINE String RUBY_PATCHLEVEL RUBY_PLATFORM
From: Hassan Schroeder on 27 Jul 2010 17:40 On Tue, Jul 27, 2010 at 2:20 PM, Joseph E. Savard <joseph.savard(a)sabre-holdings.com> wrote: As I said, I'm not interested in the version, just the path to the executable. > puts "And finally the ruby executable #{ENV['_']}" Doesn't appear to work in JRuby. Do you know if it works in anything else besides MRI? -- Hassan Schroeder ------------------------ hassan.schroeder(a)gmail.com twitter: @hassan
From: Joel VanderWerf on 27 Jul 2010 18:10 Hassan Schroeder wrote: > On Tue, Jul 27, 2010 at 2:20 PM, Joseph E. Savard > <joseph.savard(a)sabre-holdings.com> wrote: > > As I said, I'm not interested in the version, just the path to the executable. > >> puts "And finally the ruby executable #{ENV['_']}" > > Doesn't appear to work in JRuby. Do you know if it works in anything > else besides MRI? > Maybe this will work? >> File.join *Config::CONFIG.values_at("bindir", "ruby_install_name") => "/usr/local/bin/ruby"
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