How to get the version of an installed module?

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

When trying to locate the version number I keep using this:

perl -MLong::And::Stupid::Module::Name -e "print $Long::And::Stupid::M
+odule::Name::VERSION"
[download]

on Windows and

perl -MLong::And::Stupid::Module::Name -e 'print $Long::And::Stupid::M
+odule::Name::VERSION'
[download]

on Linux I even have a small shell script doing this for me but it is not always with me.

#! /bin/sh
perl -m$1 -le 'print '$1'->VERSION || die "No VERSION in '$1'\n"'
[download]

Is there any better way to do that?

perldoc showing version number?

In many modules I see people embed the version number in the POD so the reader will know. This can quickly get out of sync with the real version number. Would it be better/possible to have perldoc extract the version number of a module - when displaying the docs of a module - and show that along the documentation?

Comment on How to get the version of an installed module? Select or Download Code

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Re: How to get the version of an installed module? by ikegami (Patriarch) on Feb 01, 2011 at 07:08 UTC
If you just want to do a quick and dirty check, `perl -e'use Module 999'` [download] The error message will include the module's version number.	[reply] [d/l]
Re^2: How to get the version of an installed module? by roboticus (Chancellor) on Feb 01, 2011 at 11:08 UTC
Just to clarify ikegami's response: The command line tells perl that you want version 999 of the module in question. When perl can't find that version, it reports the version you do have: `$ perl -e 'use Spreadsheet::ParseExcel 999' Spreadsheet::ParseExcel version 999 required--this is only version 0.5 +7 at -e line 1. BEGIN failed--compilation aborted at -e line 1.` [download] (I didn't recognize what the command line was doing until I executed it to see the error message. I knew you could specify the version on the use line, but thought there was more syntax to it.) ...roboticus When your only tool is a hammer, all problems look like your thumb.	[reply] [d/l]
Re: How to get the version of an installed module? by Khen1950fx (Canon) on Feb 01, 2011 at 08:56 UTC
See App::DualLivedList. For example, the version numbers for Catalyst::Runtime: `dual-lived Catalyst::Runtime` [download] It'll accurately give you the current and installed version numbers.	[reply] [d/l]
Re: How to get the version of an installed module? by planetscape (Chancellor) on Feb 01, 2011 at 11:35 UTC
See also Re: how to determine whether a module is installed or not? HTH, planetscape	[reply]
Re: How to get the version of an installed module? by JavaFan (Canon) on Feb 01, 2011 at 12:34 UTC
http://search.cpan.org/~abeltje/V-0.13/V.pm.	[reply]
Re^2: How to get the version of an installed module? by Tux (Canon) on Feb 02, 2011 at 00:13 UTC
That would have been my suggestion too. I use it all the time. You can even combine multiple modules: $ perl -MV=DBI,DBD::CSV,DBD::Pg DBI /pro/lib/perl5/site_perl/5.12.2/i686-linux-64int-ld/DBI.pm: 1. +616 DBD::CSV /pro/lib/perl5/site_perl/5.12.2/DBD/CSV.pm: 0.31 DBD::Pg /pro/lib/perl5/site_perl/5.12.2/i686-linux-64int-ld/DBD/Pg.pm: + 2.17.1 $ [download] Enjoy, Have FUN! H.Merijn	[reply] [d/l]
Re: How to get the version of an installed module? by JavaFan (Canon) on Feb 01, 2011 at 12:43 UTC
In many modules I see people embed the version number in the POD so the reader will know. This can quickly get out of sync with the real version number. Write a test. Or a little script that either synchronizes, or increments version numbers. Would it be better/possible to have perldoc extract the version number of a module - when displaying the docs of a module - and show that along the documentation? Probably not. But you can always do something like (untested): `{no warnings; <<'=pod'} =pod our $VERSION = '1.2.3'; =pod =cut` [download] The first `=pod` tricks most, if not all, podlators into thinking POD starts. They're all fooled, and perl knows. The second `=pod` starts the real POD section. `=cut` syncs perl and the podlators.	[reply] [d/l] [select]