moderated, borken CPAN on OS X

comp.lang.perl.moderated - Perl language. (Moderated)


moderated >> borken CPAN on OS X

by miah_gbg » Mon, 25 Jul 2005 20:38:42 GMT

Hello,

CPAN is being very unfriendly. I am running it from the command line
thusly;

# perl -MCPAN -e 'install LWP::UserAgent'

and it is replying

"Can't locate object method "install" via package "LWP::UserAgent" at
-e line 1."

I have tried to enter the CPAN shell and install, reset my conf files,
chown the .cpan directory and many other things, but for me CPAN is
just broken. The CPAN web site has not been much help and searching
this newsgroup for informatin on CPAN yields two year old messages. Is
there anyone out there with similar experiences who got CPAN to work?

Many thanks,

Jeremiah
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moderated >> borken CPAN on OS X

by Mark Jason Dominus » Mon, 25 Jul 2005 22:10:37 GMT



Short answer: Use

perl -MCPAN -e 'install("LWP::UserAgent")'

instead.


The 'install LWP::UserAgent' notation is a bit of a cheat, because it
is ambiguous.

It might mean

install('LWP::UserAgent')

which is what you want, but it could also be interpreted as

LWP::UserAgent->install()

which is not what you want. How does Perl decide?

There are several criteria Perl uses. For example, if the current
program has loaded a module named 'LWP::UserAgent', Perl choses the
second interpretation; if not, it choses the first.

Usually, when you run "perl -MCPAN -e 'install Foo'" you are not also
using the module Foo at the same time, because it is not installed
yet, so Perl will assume that you meant "install('Foo')". So
usually you can leave out the punctuation and everything works OK.

But in this case, you do already have the LWP::UserAgent module
installed, and the CPAN module has loaded it, because CPAN.pm is
planning to use it to download files! So the other interpretation is
chosen.

I hope this was helpful.
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moderated >> borken CPAN on OS X

by Gaal Yahas » Mon, 25 Jul 2005 22:43:36 GMT


Use a quoted string, not a bareword:

perl -MCPAN -e 'install "LWP::UserAgent"'

--
Gaal Yahas < XXXX@XXXXX.COM >
http://gaal.livejournal.com/
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moderated >> borken CPAN on OS X

by miah_gbg » Tue, 26 Jul 2005 04:37:49 GMT

Yes, that was very helpful, thank you. I have run into other errors
however and am thinking about moving towards another solution.

Thanks for the reply.
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moderated >> borken CPAN on OS X

by brian d foy » Thu, 28 Jul 2005 00:39:16 GMT

In article < XXXX@XXXXX.COM >, Mark Jason Dominus



or just

$ cpan LWP::UserAgent

--
brian d foy, XXXX@XXXXX.COM
Subscribe to The Perl Review: http://www.theperlreview.com
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