Find out if a module is installed in perl (and what version)

perl -MModule::Name\ 9999 -e 1
This attempts to load a Perl Module (-M flag) and use version 9999, since no module has a version this high, Perl exits either a) telling you the version of the module installed or b) tells you it can't find the module.
Sample Output
[email protected]:~$ perl -MMoose\ 9999 -e 1
Moose version 9999 required--this is only version 2.0604.
BEGIN failed--compilation aborted.

[email protected]:~$ perl -MModule::Name\ 9999 -e 1
Can't locate Module/ in @INC (@INC contains: /home/foo/perl5/lib/perl5/x86_64-linux-gnu-thread-multi /home/foo/perl5/lib/perl5/x86_64-linux-gnu-thread-multi /home/jon/perl5/lib/perl5 /etc/perl /usr/local/lib/perl/5.14.2 /usr/local/share/perl/5.14.2 /usr/lib/perl5 /usr/share/perl5 /usr/lib/perl/5.14 /usr/share/perl/5.14 /usr/local/lib/site_perl .).
BEGIN failed--compilation aborted.

By: three18ti
2013-01-15 22:51:39

3 Alternatives + Submit Alt

What do you think?

Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

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