i have a script in my HOME/bin :
/Users/yt/bin/path_test.rb
my "HOME/bin" is in the PATH
then, if from this script, i outputs $0 and __FILE__
with :
path_test.rb i got :
$0 = /Users/yt/bin/path_test.rb
__FILE__ = /Users/yt/bin/path_test.rb
and the same outputs with :
/Users/yt/bin/path_test.rb
why do i have the same outputs in this case ?
in fact i'm looking that because i do have Ruby class extension in a
subfolder of "HOME/bin", namely :
HOME/bin/ruby_ext
where i put my extension for classes of which i could require :
require "#{File.dirname($0)}/ruby_ext/ansi_color"
what's the best way to require in that case, does i need an "absolute
path (starting from / ) or not ?
···
--
« Je suis sûr que la gaîté ambiguë du drôle de garçon qui a bu du
whisky et fait le zèbre sur un vieux caïman à Noël dans le cañon, a été
bénéfique à l'âme du poète blême, ainsi qu'à son cœur & cætera ! »
(© Jean-Paul Blanc)
Having a hard time understanding your question. Here are some possible
thoughts:
Difference between $0 and __FILE__
$ echo 'p $0 , __FILE__' > callee0.rb
$ echo 'p $0 , __FILE__' > callee1.rb
$ echo 'p $0 , __FILE__' > callee2.rb
$ echo '3.times { |i| require "callee#{i}" ; puts }' > main_prog.rb
$ ruby main_prog.rb
"main_prog.rb"
"./callee0.rb"
"main_prog.rb"
"./callee1.rb"
"main_prog.rb"
"./callee2.rb"
You have the same output because
The program that was run is the same as the file being checked
How to require relative files:
class File - RDoc Documentation
Tip: Relative paths with File.expand_path - Tom Ward's Blog
In this case, that probably means you want
File.expand_path('ruby_ext/ansi_color',__FILE__)
···
2010/5/15 Une Bévue <unbewusst.sein@google.com.invalid>
i have a script in my HOME/bin :
/Users/yt/bin/path_test.rb
my "HOME/bin" is in the PATH
then, if from this script, i outputs $0 and __FILE__
with :
path_test.rb i got :
$0 = /Users/yt/bin/path_test.rb
__FILE__ = /Users/yt/bin/path_test.rb
and the same outputs with :
/Users/yt/bin/path_test.rb
why do i have the same outputs in this case ?
in fact i'm looking that because i do have Ruby class extension in a
subfolder of "HOME/bin", namely :
HOME/bin/ruby_ext
where i put my extension for classes of which i could require :
require "#{File.dirname($0)}/ruby_ext/ansi_color"
what's the best way to require in that case, does i need an "absolute
path (starting from / ) or not ?
--
« Je suis sûr que la gaîté ambiguë du drôle de garçon qui a bu du
whisky et fait le zèbre sur un vieux caïman à Noël dans le cañon, a été
bénéfique à l'âme du poète blême, ainsi qu'à son cœur & cætera ! »
(© Jean-Paul Blanc)
i have a script in my HOME/bin :
/Users/yt/bin/path_test.rb
my "HOME/bin" is in the PATH
then, if from this script, i outputs $0 and __FILE__
with :
path_test.rb i got :
$0 = /Users/yt/bin/path_test.rb
__FILE__ = /Users/yt/bin/path_test.rb
and the same outputs with :
/Users/yt/bin/path_test.rb
why do i have the same outputs in this case ?
Because the shell will also expand full names. How does your PATH look like? I assume you set something like PATH="${PATH}:${HOME}/bin" - in that case you'll have the absolute path to ~/bin in your PATH and consequently the script is invoked with absolute path.
in fact i'm looking that because i do have Ruby class extension in a
subfolder of "HOME/bin", namely :
HOME/bin/ruby_ext
where i put my extension for classes of which i could require :
require "#{File.dirname($0)}/ruby_ext/ansi_color"
what's the best way to require in that case, does i need an "absolute
path (starting from / ) or not ?
IMHO the best way is to define a local location of library files and set RUBYLIB to that directory (I use "$HOME/lib/ruby" for that because I prefer to have lib code separate from programs, but in your case you could also use "$HOME/bin").
If you want to do it on a per script basis you could do this at the beginning of your script (i.e. before any requires):
$:.unshift "/your/folder/here"
Kind regards
robert
···
On 15.05.2010 10:33, Une Bévue wrote:
--
remember.guy do |as, often| as.you_can - without end
http://blog.rubybestpractices.com/