diff options
Diffstat (limited to 'perl/Git')
| -rw-r--r-- | perl/Git/LoadCPAN.pm | 33 |
1 files changed, 32 insertions, 1 deletions
diff --git a/perl/Git/LoadCPAN.pm b/perl/Git/LoadCPAN.pm index 229c1ee87d..e5585e75e8 100644 --- a/perl/Git/LoadCPAN.pm +++ b/perl/Git/LoadCPAN.pm @@ -19,13 +19,25 @@ attempt to load C<Module::Name> from the OS, and if that doesn't work will fall back on C<FromCPAN::Module::Name> shipped with Git itself. Usually distributors will not ship with Git's Git::FromCPAN tree at -all, preferring to use their own packaging of CPAN modules instead. +all via the C<NO_PERL_CPAN_FALLBACKS> option, preferring to use their +own packaging of CPAN modules instead. This module is only intended to be used for code shipping in the C<git.git> repository. Use it for anything else at your peril! =cut +# NO_PERL_CPAN_FALLBACKS_STR evades the sed search-replace from the +# Makefile, and allows for detecting whether the module is loaded from +# perl/Git as opposed to perl/build/Git, which is useful for one-off +# testing without having Error.pm et al installed. +use constant NO_PERL_CPAN_FALLBACKS_STR => '@@' . 'NO_PERL_CPAN_FALLBACKS' . '@@'; +use constant NO_PERL_CPAN_FALLBACKS => ( + q[@@NO_PERL_CPAN_FALLBACKS@@] ne '' + and + q[@@NO_PERL_CPAN_FALLBACKS@@] ne NO_PERL_CPAN_FALLBACKS_STR +); + sub import { shift; my $caller = caller; @@ -45,6 +57,25 @@ sub import { } or do { my $error = $@ || "Zombie Error"; + if (NO_PERL_CPAN_FALLBACKS) { + chomp(my $error = sprintf <<'THEY_PROMISED', $module); +BUG: The '%s' module is not here, but NO_PERL_CPAN_FALLBACKS was set! + +Git needs this Perl module from the CPAN, and will by default ship +with a copy of it. This Git was built with NO_PERL_CPAN_FALLBACKS, +meaning that whoever built it promised to provide this module. + +You're seeing this error because they broke that promise, and we can't +load our fallback version, since we were asked not to install it. + +If you're seeing this error and didn't package Git yourself the +package you're using is broken, or your system is broken. This error +won't appear if Git is built without NO_PERL_CPAN_FALLBACKS (instead +we'll use our fallback version of the module). +THEY_PROMISED + die $error; + } + my $Git_LoadCPAN_pm_path = $INC{"Git/LoadCPAN.pm"} || die "BUG: Should have our own path from %INC!"; require File::Basename; |