perl/Git/Error.pm

   1 package Git::Error;
   2 use 5.008;
   3 use strict;
   4 use warnings;
   5
   6 =head1 NAME
   7
   8 Git::Error - Wrapper for the L<Error> module, in case it's not installed
   9
  10 =head1 DESCRIPTION
  11
  12 Wraps the import function for the L<Error> module.
  13
  14 This module is only intended to be used for code shipping in the
  15 C<git.git> repository. Use it for anything else at your peril!
  16
  17 =cut
  18
  19 sub import {
  20     shift;
  21     my $caller = caller;
  22
  23     eval {
  24         require Error;
  25         1;
  26     } or do {
  27         my $error = $@ || "Zombie Error";
  28
  29         my $Git_Error_pm_path = $INC{"Git/Error.pm"} || die "BUG: Should have our own path from %INC!";
  30
  31         require File::Basename;
  32         my $Git_Error_pm_root = File::Basename::dirname($Git_Error_pm_path) || die "BUG: Can't figure out lib/Git dirname from '$Git_Error_pm_path'!";
  33
  34         require File::Spec;
  35         my $Git_pm_FromCPAN_root = File::Spec->catdir($Git_Error_pm_root, 'FromCPAN');
  36         die "BUG: '$Git_pm_FromCPAN_root' should be a directory!" unless -d $Git_pm_FromCPAN_root;
  37
  38         local @INC = ($Git_pm_FromCPAN_root, @INC);
  39         require Error;
  40     };
  41
  42     unshift @_, $caller;
  43     goto &Error::import;
  44 }
  45
  46 1;