Check script's dependencies

Update: I've written Module::CheckDeps and checkdeps, so you can use them instead of this script.

Hi everybody. I needed a simple way to check script's dependencies.

Searching on PerlMonks I found two scripts (Check a script's module dependencies and robustly list any Perl code's module dependencies) but I think a better way to achieve that would be using the Module::ExtractUse module, so I wrote my version.

#!/usr/bin/perl

# Usage: checkdeps.pl SCRIPT
# Check Perl script's dependencies

use Module::ExtractUse;

use strict;

my $script = $ARGV[0] or die "Usage: $0 SCRIPT\n";

open SCRIPT, $script or die "$!\n";
my $code = join "", <SCRIPT>;
close SCRIPT;

my $p = Module::ExtractUse -> new;
$p -> extract_use(\$code);

my @used = $p -> array;

foreach my $module(@used) {
        eval "use $module";
        next if !$@;
        print $module."\n";
}
[download]

It simply prints every modules not yet installed (one per line) on which the script depends, ready to feed the cpan script.

For example:

$ cpan `perl checkdeps.pl somescript.pl`

Any hints about the code?

Alex's Log - http://alexlog.co.cc

Comment on Check script's dependencies Select or Download Code
Re: Check script's dependencies by runrig (Abbot) on May 25, 2010 at 17:51 UTC
There is also Module-ScanDeps.	[reply]
Re^2: Check script's dependencies by alexbio (Monk) on May 25, 2010 at 18:01 UTC
I tried the `scandeps.pl` script, but it takes a lot of time (also with the '-R' option active) and its output is not what I needed. Also the module is quite slow, so I found Module::ExtractUse more appropriate because of its "lightness". Alex's Log - http://alexlog.co.cc	[reply] [d/l]
Re: Check script's dependencies by Khen1950fx (Canon) on May 27, 2010 at 06:26 UTC
Interesting, but it doesn't work for me. I added Data::Dumper and took out the foreach and replaced it with `print Dumper($p->used);` Now it works for me. `#!/usr/bin/perl # Usage: checkdeps.pl SCRIPT # Check Perl script's dependencies use strict; use warnings; use Module::ExtractUse; use YAML; use YAML::Dumper; my $script = $ARGV[0] or die "Usage: $0 SCRIPT\n"; open SCRIPT, $script or die "$!\n"; my $code = join "", <SCRIPT>; close SCRIPT; my $p = Module::ExtractUse->new; $p->extract_use(\$code); my $dumper = YAML::Dumper->new; $dumper->indent_width(4); my @used = $p->array; print $dumper->dump($p->used);` [download]	[reply] [d/l] [select]
Re^2: Check script's dependencies by alexbio (Monk) on May 27, 2010 at 16:47 UTC
Thank you for your help, but I think your code lost the main features I needed: the test on every module to check if it is installed and the "formatted output". I really don't understand what's wrong in my code, I tested it on both Linux (perl 5.10.1) and Windows XP (the latest strawberry perl). Has anyone more experienced than me any ideas? Alex's Log - http://alexlog.co.cc	[reply]
Re: Check script's dependencies by Anonymous Monk on Jun 15, 2010 at 18:02 UTC
Might want to call it CheckUninstalledModules.pl	[reply]


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Check script's dependencies

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