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From "Nick Wellnhofer (JIRA)" <j...@apache.org>
Subject [lucy-issues] [jira] [Created] (CLOWNFISH-70) Export major version from Perl bindings
Date Sat, 06 Feb 2016 14:37:39 GMT
Nick Wellnhofer created CLOWNFISH-70:
----------------------------------------

             Summary: Export major version from Perl bindings
                 Key: CLOWNFISH-70
                 URL: https://issues.apache.org/jira/browse/CLOWNFISH-70
             Project: Apache Lucy-Clownfish
          Issue Type: Improvement
          Components: Perl
            Reporter: Nick Wellnhofer
            Assignee: Nick Wellnhofer


The Perl bindings for a Clownfish parcel should export the major version, so dependent parcels
can die with a meaningful error message if they find a newer and incompatible major version.

For now, I'd propose to implement a manual check. In Clownfish.pm, we could have something
like:

{noformat}
our $MAJOR_VERSION = 0.005000;
{noformat}

And in a dependent parcel like Lucy, something like:

{noformat}
use Clownfish 0.005000;
BEGIN {
    die <<"EOF" if $Clownfish::MAJOR_VERSION > 0.005000;
This version of Lucy doesn't support Clownfish $Clownfish::MAJOR_VERSION or higher.
You should downgrade Clownfish or, if possible, upgrade Lucy.
EOF
}
{noformat}




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