Re: CPAN, recursive dependency problem

You could break the cycle by downloading individual tarballs, e.g:

    cpan> get K/KW/KWILLIAMS/PathTools-3.03.tar.gz
[download]

hunt it down on disk (~/.cpan/sources/...), untar, build and install manually:

    tar zxfv PathTools-3.03.tar.gz
    cd PathTools-3.03
    perl Makefile.PL
    make install
[download]

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Re^2: CPAN, recursive dependency problem by ecsd (Initiate) on Jan 28, 2005 at 01:29 UTC
Where (or how) does CPAN's install figure that there is a dependency? I would like to be able to break stuff to lie to it, and I'd as soon break the "idea" that there is a dependency loop. Also, if this comes up with any frequency, I'd suggest enforcing some scheme to prevent such loops in the first place. I haven't seen any reference to this issue in any other FAQs (CPAN, Perl) but it bites often enough. Thanks for the information. -ecsd	[reply]
Re^2: CPAN, recursive dependency problem by ecsd (Initiate) on Jan 28, 2005 at 01:33 UTC
It's worth pointing out that CPAN will also not allow a "get" of a module in a dependency chain, so that has to be done manually also.	[reply]
Re^3: CPAN, recursive dependency problem by saintmike (Vicar) on Jan 28, 2005 at 05:56 UTC
It's worth pointing out that CPAN will also not allow a "get" of a module in a dependency chain ... Not true. Here's a quick way to verify dependencies (even circular ones): There's two modules on CPAN with the sole purpose of defining a circular dependency between each other: Acme::Prereq::A and Acme::Prereq::B. `Acme::Prereq::A` depends on `Acme::Prereq::B` and vice versa, see `Acme::Prereq::A`'s Makefile.PL: `'PREREQ_PM' => { 'Acme::Prereq::B' => 0, }, # e.g., Module::Name => 1.1` [download] Try it out, it works fine: `perl -MCPAN -eshell cpan> get Acme::Prereq::B` [download] The CPAN shell's `get` command will fetch the requested module's tarball without checking dependencies. However, if you've run into a recursive dependency within a CPAN session, CPAN.pm will keep complaining, even if you switch to `get`. Restart the CPAN shell to get back to normal.	[reply] [d/l] [select]