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How do I determine module version in my script?

by LameNerd (Hermit)
on Jul 23, 2003 at 17:03 UTC ( #277250=perlquestion: print w/replies, xml ) Need Help??

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

Hello Monks,

Thanks for your help with my DBI question. In that node I asked why I was getting a warning when I called DBI->connect() like so ...
DBI->connect( $dbname, $dbuser, $dbpass, $dbd );
The answer is that with the new version of DBI I should call DBI->connect() like this ...
DBI->connect("dbi:$dbd:$dbname", $user, $pass);
Now what I would like to know is how would I go about doing something like this ...
my $DBI_version = getDBI_Version(); if ( $DBI_version > $oldstyle ) { $dbh = DBI->connect("dbi:$dbd:$dbname", $user, $pass); } else { $dbh = DBI->connect( $dbname, $dbuser, $dbpass, $dbd ); }
Does this make any sense? Or am I make this issue too complicated?

Replies are listed 'Best First'.
Re: How do I determine module version in my script?
by NetWallah (Canon) on Jul 23, 2003 at 17:11 UTC
    This works for me, on the command line:
    perl -e "use DBI; print $DBI::VERSION"
    (On WIn32).
Re: How do I determine module version in my script?
by moxliukas (Curate) on Jul 23, 2003 at 17:09 UTC

    I have never used DBI, so I don't know if you should get round the interface change in this way. However, to answer your question, most modules keep their version number in a variable $VERSION, so in DBI's case you can get to it via a variable $DBI::VERSION. Here's an example how I got at the CPAN module version:

     perl -MCPAN -e 'print "$CPAN::VERSION\n"'

    Hope this helps

Re: How do I determine module version in my script? ( END{if defined $opt_versions...} )
by ybiC (Prior) on Jul 23, 2003 at 17:33 UTC
    To (hopefully) add even more value to the above fine answers...   the following was gleaned from The Dynamic Duo --or-- Holy Getopt::Long, Pod::UsageMan!.   It might not even apply to your situation, yet perhaps still be of value for monks what find your post sometime in the future.

      striving toward Perl Adept
      (it's pronounced "why-bick")
    END{ if(defined $opt_versions){ print "\nModules, Perl, OS, Program info:\n", " Weather::Underground $Weather::Underground::VERSION\n", " Pod::Usage $Pod::Usage::VERSION\n", " Getopt::Long $Getopt::Long::VERSION\n", " strict $strict::VERSION\n", " Perl $]\n", " OS $^O\n", " $wunderg_VER\n", " $0\n", } }

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