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  • Dependencies of a CPAN package

    From dacav@21:1/5 to All on Sat May 6 15:26:15 2017
    Hello Perl folk!

    I'm currently in the process of improving a Perl package I wrote: App::PFT. It's time for me to decide the version of my dependencies. This is a task I postponed up to now, but it is now time to get it right.

    I'm wondering what would be the version assignment that works better. I
    started therefore by installing my package on different GNU/Linux
    distributions via Docker, and to check how it goes.

    The first one was Debian Jessie. Before being able to install it clean I had
    to place a couple of Debian dependencies (locales-all, liblocal-lib-perl for local::lib, make and gcc). After that, the installation of App::PFT went
    smooth (comprehensive of unit-test), and I could see the following dependencies:

    Carp 1.3301
    Cwd 3.48_01
    Encode 2.60
    Encode::Locale 1.05
    Exporter 5.71
    File::Basename 2.85
    File::Path 2.09
    File::Spec 3.48_01
    File::Spec::Functions 3.48_01
    IO::File 1.16
    Text::Markdown 1.000031
    Scalar::Util 1.38
    YAML::Tiny 1.70

    So far so good. I thought I could take these versions and declare a
    dependency to anything greater or equal. Just out of curiosity I also tried
    the same on Ubuntu 16.04:

    Carp 1.36
    Cwd 3.56
    Encode 2.72
    Encode::Locale 1.05
    Exporter 5.72
    File::Basename 2.85
    File::Path 2.09
    File::Spec 3.56
    File::Spec::Functions 3.56
    IO::File 1.16
    Text::Markdown 1.000031
    Scalar::Util 1.41
    YAML::Tiny 1.70

    Different versions here! And I did this literally a couple of minutes later!

    I'm a bit surprised to see that Ubuntu installed via CPAN different version numbers. Of course I would expect different things if I was installing from
    the Debian's repository VS Ubuntu's repositories. What I didn't expect is to see differences when I install on both distributions via CPAN.

    Do you maybe know why this happens?

    Thanks in advance

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  • From Eric Pozharski@21:1/5 to dacav on Sun May 7 16:12:22 2017
    with <oekpun$oe7$[email protected]> dacav wrote:

    I'm currently in the process of improving a Perl package I wrote:
    App::PFT. It's time for me to decide the version of my dependencies.
    This is a task I postponed up to now, but it is now time to get it
    right.

    I suggest you stop wasting your time. Ship without versioned
    dependencies; wait for couple of days (two weeks should be fine);
    inspect FAILs of cpantesters; re-iterate.

    *SKIP*
    I'm a bit surprised to see that Ubuntu installed via CPAN different
    version numbers. Of course I would expect different things if I was installing from the Debian's repository VS Ubuntu's repositories. What
    I didn't expect is to see differences when I install on both
    distributions via CPAN.
    Do you maybe know why this happens?

    I don't see your versionful dependency of perl. What could possibly go
    wrong here?

    --
    Torvalds' goal for Linux is very simple: World Domination
    Stallman's goal for GNU is even simpler: Freedom

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