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Re: A master-list of module dependencies?

by biosysadmin (Deacon)
on Jul 11, 2004 at 18:46 UTC ( #373497=note: print w/ replies, xml ) Need Help??


in reply to A master-list of module dependencies?

Is downloading every module really that much of a hassle? I maintain a local CPAN mirror on the Bioinformatics server up at school, and it's only 2.3G large. If size if really that much of an issue you could cut this down considerably by using merlyn's article on Mirroring your own mini-CPAN.

If I were doing this I would probably use a Mini-CPAN because you're probably not interested in older module versions.


Comment on Re: A master-list of module dependencies?
Re: A master-list of module dependencies?
by DapperDan (Pilgrim) on Jul 11, 2004 at 20:22 UTC
    It seems to me that you are still expected to develop your own custom rsync/cron configuration to mirror CPAN. Frankly, that's too much effort for an ordinary developer; it's easier to just use CPANPLUS, or suffer on when you're offline.

    I think if there were HOWTOs for platforms, e.g. MacOS X, each BSD, each Linux distribution, more people would be mirroring CPAN (e.g. on their laptops).

    The intersection set between Perl application developers and those who are willing to invest half a day in setting up a CPAN mirror may not be that large. I know that the payoff isn't good enough for me, but I would do it if it were cheaper in terms of effort.

      I think if there were HOWTOs for platforms, e.g. MacOS X, each BSD, each Linux distribution, more people would be mirroring CPAN (e.g. on their laptops).

      Like the How to mirror CPAN section of the CPAN FAQ you mean :-)

      Basically:

      rsync -av --delete rsync.mirror.of.your.choice::CPAN mycpan

      should do the job.

      As adrianh has pointed out, mirroring CPAN is not very hard at all. Here's the two lines from my crontab that do the job just fine:
      # Update CPAN mirror at 2am every Sunday 0 2 * * 0 /usr/local/bin/rsync -av --delete cpan.mirror.findityourself +.com::CPAN /var/apache/htdocs/CPAN/ >> /dev/null 2>&1
      That took me about 10 minutes to set up the very first time, which really isn't half of a day. Extending it to any Unix-ish system (such as Linux, BSD or MacOSX) should take about 5 minutes. That's much less than half of a day. Unless you live on a planet like Mercury. :P
        I stand corrected. This is a clear case of RTFM if ever there was one.

        Thank you both...

      What's so hard about 0 0 * * * (cd ~me/CPAN-mirror &&  rsync -av --bwlimit=15 --delete rsync.nic.funet.fi::CPAN .)?

      Most people do not mirror CPAN on their machines because they will never need a majority of the modules.

Re^2: A master-list of module dependencies?
by rrwo (Friar) on Jul 12, 2004 at 20:21 UTC
    Is downloading every module really that much of a hassle?...

    Not really, but it seems that this information should already be out there. As far as I can tell, it's not. So I'm in the process of generating my own list. What I'm doing:

    • If there is a .meta file available, I use that,
    • otherwise I download the module, extract the Makefile.PL and do some simple parsing using a module I wrote called Module::MakefilePL::Parse (since Module::Depends uses modules which do not work well on Windows -- ironically this was one of the reasons I started on this project)
Re^2: A master-list of module dependencies?
by rrwo (Friar) on Nov 17, 2004 at 22:18 UTC
    Is downloading every module really that much of a hassle?

    Now that I have moved to a place with poor internet connectivity, yes.

    However, I have a source for some of my information from CPANTS.

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