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Perl Find Question

System

All of my perl does use strict. I have lots of scripts that need to find assets in a filesystem using various conditions - find all files, find all files containing some text, find all files with filenames matching some string, find all directories, find all files and directories, etc. I use File::Find::find for this but I would like to move the wanted function into a module with some more generic logic (pass a regex, etc.). But with strict on I don't know how to pass the array, regex, etc. to the find wanted subroutine in the module - the Perl compiler throws warnings about undeclared variables and won't let me install the module.

I hope this makes sense but I can clarify if needed. Hopefully someone has already resolved a similar problem.

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Comments

Johnny

Do you want to post the code as an attachment so we can have a look.

Im not sure where it would be complaining about the declaration, but sometimes its a little cleaner to treat your params as a hash ref.

eg $someObj->someMethod(param1 => 'value1',
param2 => 'value2');

and then check to see if they exist/defined in the routine.

Cant really say much exactly without seeing what you are doing.

Also for what it is worth, Ive been using TeamSite: Smiley Very Happy

irwalk instead of file::find.
I find it to be alot better to work with. You can do a few interesting things with it too.
have a read of the perldoc.

John Cuiuli

Migrateduser

Let's say I have a Perl module FindUtil.pm, that contains a subroutine findMatchingFiles intended to work as a File::Find::find "wanted" function.

sub findMatchingFiles
{
my ${file} = ${File::Find::name};
...
}

Then I have a script that I want to have use this wanted function.

use strict;
use FindUtil.pm;

my @{list} = ();
my ${dir} = "/tmp";

find( \&findMatchingFiles, ${dir} );

What I need to know is how do I pass parameters (such as the array to populate or a regex if I only want the array populated with files with names matching some pattern) to findMatchingFiles.

Thanks,

-John

Adam Stoller

It truly would help to see both FindUtil.pm *and* the script that uses it....

--fish
Strolling Prime Minister of no fixed address

Migrateduser

Let's say I have the attached code and it does not generate warnings (though I don't think the global variables are good practice). I want to move findMatchingFiles to a module but then list and regex are undefined. What I want is a way to add my variables to the things that are passed to find.

Migrateduser

I guess I move the global variables into the package, then set the regex before calling find with something like ${FindUtil::regex}, then reference them from the calling script using @{FindUtil::foundList} or something.

Johnny

file::find routine that you pass to is controlled by file:find meaning you cant tack on your own params to it.

also if your routine is in a module you will to export to it so that is is part of the script namespace.

TeamSite: Smiley Very Happy

Irwalk has an custom hash ref called ->aux that lets you put stuff in there so your routine can use them... almost like params in a way.

Its always good to have your find routine to act as a controller which determines which routine should handle the file/directory and what info should be put into ->aux

John Cuiuli

Migrateduser

The llama book (around page 70 in this edition) has some information that may be applicable - when I get a chance I'll give it a try.

Migrateduser

Well here's a first stab.