Using 'require' with modules in the same folder

ruby-talk
1

Hi people,

I've modularized my very first ruby program (a port of a bash script).

However, if I use 'load' and the target program is loaded multiple times (indirectly), I get warnings about redefinition of constants, etc (understandably)

But if I try to use 'require', it searches for the program in the ruby distribution. Is there a way to specify within the top level script itself where to search?

TIA

···

--
Fernando Cacciola
SciSoft
http://fcacciola.50webs.com

2

Fernando Cacciola wrote:

Hi people,

I've modularized my very first ruby program (a port of a bash script).

However, if I use 'load' and the target program is loaded multiple times
(indirectly), I get warnings about redefinition of constants, etc
(understandably)

But if I try to use 'require', it searches for the program in the ruby
distribution. Is there a way to specify within the top level script
itself where to search?

You can use relative/absolute paths with require. Combined with
__FILE__, more precisely File.dirname(__FILE__), you can require other
files relative to your current one.

mortee

3

Fernando Cacciola wrote:

But if I try to use 'require', it searches for the program in the ruby
distribution.

Never mind... the current folder is included in the search path, I just got confused by an error message from the loaded program.

Is there a way to specify within the top level script
itself where to search?

FWIW

$: << "additional_path"

seems to do it, according to "Programming ruby"

···

--
Fernando Cacciola
SciSoft
http://fcacciola.50webs.com

4

Yes, there's a standard idiom for that:

   $:.unshift(File.dirname(__FILE__))

which means: prepend to the list of directories where libraries are searched ($:) the directory where this file lives. Note that does not assume the directory is the current working directory, since __FILE__ points to the containing file, no matter how is being evaled.

-- fxn

···

On Nov 6, 2007, at 1:00 PM, Fernando Cacciola wrote:

Hi people,

I've modularized my very first ruby program (a port of a bash script).

However, if I use 'load' and the target program is loaded multiple times (indirectly), I get warnings about redefinition of constants, etc (understandably)

But if I try to use 'require', it searches for the program in the ruby distribution. Is there a way to specify within the top level script itself where to search?