Finding relative path to called script

Anonymous Monk has asked for the wisdom of the Perl Monks concerning the following question:

Hello revered monks, I am using Test::Harness to call a test script using a relative path. i.e.

use strict;

use Test::Harness;

my @scripts = qw(
../../somedir/anotherdir/script.pl
);

runtests(@scripts);
[download]

The problem is that my script.pl use relative "use lib" statements. My question is what is the best way for a script to know what its path is relative to the calling script. Any help will be greatly appreciated.

Comment on Finding relative path to called script Download Code

Replies are listed 'Best First'.
Re: Finding relative path to called script by mickeyn (Priest) on Jul 26, 2006 at 14:46 UTC
try: `use FindBin qw($Bin);` [download] $Bin is now your script's path. Enjoy, Mickey	[reply] [d/l]
Re: Finding relative path to called script by bsdz (Friar) on Jul 26, 2006 at 14:35 UTC
You could use caller and dirname to find the scripts current relative directory then chdir to it. I.e. put this at the top of your script.pl `BEGIN { use File::Basename; chdir((sub { return dirname((caller(0))[1]) })->()); }` [download] The code must be exceuted in a BEGIN block before any other modules are loaded. The anonymous sub gives caller some context. Hope that helps :)	[reply] [d/l]
Re: Finding relative path to called script by duc (Beadle) on Jul 26, 2006 at 15:19 UTC
I guess there is a lot of way to do it but I have run into the same kind of problem. Since you know the path to the script you are calling, you call simply do a chdir to that path. `chdir("../../somedire/anotherdir/script.pl");` This would change your current working directory but it is simple and it works.	[reply] [d/l]
Re: Finding relative path to called script by eff_i_g (Curate) on Jul 26, 2006 at 17:23 UTC
I use mickeyn's suggestion: `use FindBin; use lib "$FindBin::Bin/Packages"; print "Using libraries from $FindBin::Bin/Packages.\n";` [download]	[reply] [d/l]
Re: Finding relative path to called script by Anonymous Monk on Jul 26, 2006 at 16:40 UTC
That is great. I can see there are many alternatives. Many thanks monks.	[reply]