Add --git-depth option

The option adds --depth option to all git clone commands

Author: atroxaper

Configure.pl

@@ -31,7 +31,8 @@
                'with-parrot=s', 'gen-parrot:s', 'parrot-config=s', 'parrot-option=s@',
                'with-moar=s', 'gen-moar:s', 'moar-option=s@',
                'make-install!', 'makefile-timing!',
-               'git-protocol=s');
+               'git-protocol=s',
+               'git-depth=s',);
 
     # Print help if it's requested
     if ($options{'help'}) {
@@ -318,6 +319,8 @@ sub print_help {
     --git-protocol={ssh,https,git}
                        Protocol to use for git clone. Default: https
     --make-install     Immediately run `MAKE install` after configuring
+    --git-depth=<number>
+                       Use the --depth option for git clone with parameter number
 
 Configure.pl also reads options from 'config.default' in the current directory.
 END

tools/lib/NQP/Configure.pm

@@ -211,11 +211,15 @@ sub git_checkout {
     my $dir  = shift;
     my $checkout = shift;
     my $pushurl = shift;
+    my $git_depth = shift;
+	my $depth = $git_depth ? '--depth=' . $git_depth : '';
     my $pwd = cwd();
 
     # get an up-to-date repository
     if (! -d $dir) {
-        system_or_die('git', 'clone', $repo, $dir);
+        my @args = ('git', 'clone', $repo, $dir);
+		push @args, $depth if $depth;
+		system_or_die(@args);
         chdir($dir);
         system('git', 'config', 'remote.origin.pushurl', $pushurl)
             if defined $pushurl && $pushurl ne $repo;
@@ -317,6 +321,7 @@ sub gen_nqp {
             github_url($git_protocol, 'perl6', 'nqp'),
             'nqp', $nqp_want,
             github_url('ssh', 'perl6', 'nqp'),
+            $options{'git-depth'},
         );
     }
 
@@ -369,6 +374,7 @@ sub gen_parrot {
             github_url($git_protocol, 'parrot', 'parrot'),
             'parrot', $gen_parrot,
             github_url('ssh', 'parrot', 'parrot'),
+            $options{'git-depth'},
         );
         $par_ok = $par_have eq $par_repo;
     }
@@ -377,6 +383,7 @@ sub gen_parrot {
             github_url($git_protocol, 'parrot', 'parrot'),
             'parrot', $par_want,
             github_url('ssh', 'parrot', 'parrot'),
+            $options{'git-depth'},
         );
     }
 
@@ -450,6 +457,7 @@ sub gen_moar {
         github_url($git_protocol, 'MoarVM', 'MoarVM'),
         'MoarVM', $gen_moar || $moar_want,
         github_url('ssh', 'MoarVM', 'MoarVM'),
+        $options{'git-depth'},
     );
 
     unless (cmp_rev($moar_repo, $moar_want) >= 0) {