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Posted to issues@lucy.apache.org by "Nick Wellnhofer (JIRA)" <ji...@apache.org> on 2016/02/06 15:37:39 UTC
[lucy-issues] [jira] [Created] (CLOWNFISH-70) Export major version from Perl
bindings
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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