Full path to the current file?

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

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Re: Full path to the current file? by davidrw (Prior) on Jan 08, 2008 at 14:59 UTC
File::Spec, File::Basename `use File::Spec; use File::Basename; my $f = '../blah.txt'; my $dir = dirname( File::Spec->rel2abs($f) );` [download]	[reply] [d/l]
Re^2: Full path to the current file? by svenXY (Deacon) on Jan 08, 2008 at 15:02 UTC
Hi, ++davidrw or even `$ perl -MFile::Spec -le 'print File::Spec->rel2abs( __FILE__ ) ;' /home/svenXY/-e # for a one-liner` [download] File::Basename is not necessary here. Regards, svenXY	[reply] [d/l]
Re^3: Full path to the current file? by davidrw (Prior) on Jan 08, 2008 at 16:01 UTC
OP said I have a module that needs to know its path in order to access another file in the same location. -- the second step of File::Basename is to fulfill that requirement (even though he didn't directly ask for it). Other shell (bash) solutions: # setup cd /var/tmp/ touch foo f='../../var/tmp/foo' # for just the directory: d=`(cd ${f%/*} && pwd)` #or: d=`dirname $f` d=`cd $d && pwd` # for the filename (rel2abs): d=`dirname $f` d=`cd $d && pwd` f=`basename $f` f=`/bin/ls $d/$f` [download]	[reply] [d/l]
Re^2: Full path to the current file? by RoUS (Initiate) on Jan 08, 2008 at 16:42 UTC
This works; thanks! The 'funky' aspect to which I referred is that when invoked from a script, the module's __FILE__ is 'XML/Foo.pm'. When invoked from the command line: perl -e "use XML::Foo; $x = new XML::Foo;' its __FILE__ is reported as '/XML/Foo.pm' -- which is clearly bogus. It has been suggested that the latter behaviour is due to Red Hat's patches for Fedora Core 8. Whatever, you've given me the solution. I guess I'll just have to wait and see if it works in all cases, or if there are edge conditions where it goes blooey. Thanks!	[reply]
Re: Full path to the current file? by cdarke (Prior) on Jan 08, 2008 at 20:30 UTC
If you want the full path name of where a module was loaded from, use %INC. For example: `use File::Basename; print "$INC{'File/Basename.pm'}\n";` [download]	[reply] [d/l]
Re: Full path to the current file? by cLive ;-) (Prior) on Jan 08, 2008 at 16:11 UTC
I have a feeling the proposed solutions above don't give you the path relative to the module, but to the script. Cwd is the simplest solution though: `#!/usr/bin/perl use strict; use warnings; use Cwd qw(abs_path getcwd); print "This script is: ".abs_path($0)."\n"; print "Working dir is: ".getcwd()."\n";` [download] but that won't tell you the path from the actual module. For that, you'll need to hard code the path to the module (I think): `my $abs_filepath = abs_path("$module_dir/$relative_pilepath");` [download] __FILENAME__ is your friend...	[reply] [d/l] [select]