perl: move the perl/Git/FromCPAN tree to perl/FromCPAN

Move the CPAN modules that have lived under perl/Git/FromCPAN since my
20d2a30 ("Makefile: replace perl/Makefile.PL with simple make
rules", 2017-12-10) to perl/FromCPAN.

A subsequent change will teach the Makefile to only install these
copies of CPAN modules if a flag that distro packagers would like to
set isn't set. Due to how the wildcard globbing is being done it's
much easier to accomplish that if they're moved to their own
directory.

Signed-off-by: Ævar Arnfjörð Bjarmason <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Makefile

@@ -2300,9 +2300,12 @@ po/build/locale/%/LC_MESSAGES/git.mo: po/%.po
 
 LIB_PERL := $(wildcard perl/Git.pm perl/Git/*.pm perl/Git/*/*.pm perl/Git/*/*/*.pm)
 LIB_PERL_GEN := $(patsubst perl/%.pm,perl/build/lib/%.pm,$(LIB_PERL))
+LIB_CPAN := $(wildcard perl/FromCPAN/*.pm perl/FromCPAN/*/*.pm)
+LIB_CPAN_GEN := $(patsubst perl/%.pm,perl/build/lib/%.pm,$(LIB_CPAN))
 
 ifndef NO_PERL
 all:: $(LIB_PERL_GEN)
+all:: $(LIB_CPAN_GEN)
 endif
 
 perl/build/lib/%.pm: perl/%.pm

perl/Git/LoadCPAN.pm

@@ -16,8 +16,7 @@ source.
 Therefore the L<Git::LoadCPAN> namespace shipped with Git contains
 wrapper modules like C<Git::LoadCPAN::Module::Name> that will first
 attempt to load C<Module::Name> from the OS, and if that doesn't work
-will fall back on C<Git::FromCPAN::Module::Name> shipped with Git
-itself.
+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.
@@ -52,7 +51,7 @@ sub import {
 		my $Git_LoadCPAN_pm_root = File::Basename::dirname($Git_LoadCPAN_pm_path) || die "BUG: Can't figure out lib/Git dirname from '$Git_LoadCPAN_pm_path'!";
 
 		require File::Spec;
-		my $Git_pm_FromCPAN_root = File::Spec->catdir($Git_LoadCPAN_pm_root, 'FromCPAN');
+		my $Git_pm_FromCPAN_root = File::Spec->catdir($Git_LoadCPAN_pm_root, '..', 'FromCPAN');
 		die "BUG: '$Git_pm_FromCPAN_root' should be a directory!" unless -d $Git_pm_FromCPAN_root;
 
 		local @INC = ($Git_pm_FromCPAN_root, @INC);