Keep -one- copy of each repo needed

When building, first fetch once per repo,
then clone locally.

japhb++ for inspiration

.gitignore

@@ -5,3 +5,4 @@ rakudo.jvm
 Pugs.hs
 roast
 LAST_OUTPUT
+repos

bin/git.p5

@@ -0,0 +1,33 @@
+#!/usr/bin/env perl
+
+# Pull down all the repositories that we need to work with, and
+# keep a pristine copy locally.
+
+my $repo_dir = "repos";
+
+if (! -d $repo_dir) {
+    mkdir $repo_dir;
+}
+
+my %repos = (
+    "rakudo"  => "https://github.com/rakudo/rakudo.git",
+    "Pugs.hs" => "https://github.com/perl6/Pugs.hs.git",
+    "niecza"  => "https://github.com/sorear/niecza.git",
+    "parrot"  => "https://github.com/parrot/parrot.git",
+    "roast"   => "https://github.com/perl6/roast.git",
+    "nqp"     => "https://github.com/perl6/nqp.git",
+    "MoarVM"  => "https://github.com/MoarVM/MoarVM.git",
+);
+
+for my $repo (keys %repos) {
+    my $dir = $repo_dir . "/" . $repo . ".git" ;
+    if (-d $dir) {
+        chdir $dir;
+        qx(git fetch);
+	chdir "../../";
+    } else {
+        chdir $repo_dir;
+        qx(git clone --mirror $repos{$repo});
+	chdir "../";
+    }
+}

bin/pugs.sh

@@ -12,7 +12,7 @@ PATH=/usr/local/bin:$PATH
 #
 
 rm -rf Pugs.hs
-git clone git://github.com/perl6/Pugs.hs.git
+git clone repos/Pugs.hs.git
 cd Pugs.hs
 ln -s ../../roast t/spec
 (cd Pugs && make)

bin/rakudo.jvm.sh

@@ -4,7 +4,8 @@
 PATH=/usr/local/bin:$PATH
 
 rm -rf rakudo.jvm
-git clone git://github.com/rakudo/rakudo.git rakudo.jvm
+git clone repos/rakudo.git rakudo.jvm
+git clone repos/nqp.git rakudo.jvm/nqp
 cd rakudo.jvm
 ln -s ../../roast t/spec
 perl Configure.pl --backends=jvm --gen-nqp

bin/rakudo.moar.sh

@@ -4,9 +4,11 @@
 PATH=/usr/local/bin:$PATH
 
 rm -rf rakudo.moar
-git clone -b moar-support git://github.com/rakudo/rakudo.git rakudo.moar
+git clone -b moar-support repos/rakudo.git rakudo.moar
+git clone repos/nqp.git rakudo.moar/nqp
+git clone repos/MoarVM.git rakudo.moar/nqp/MoarVM
 cd rakudo.moar
-ln -s ../../roast t/spec
+ln -s ../roast t/spec
 perl Configure.pl --backends=moar --gen-moar=master --gen-nqp=master
 make all
 

bin/rakudo.parrot.sh

@@ -4,7 +4,9 @@
 PATH=/usr/local/bin:$PATH
 
 rm -rf rakudo.parrot
-git clone git://github.com/rakudo/rakudo.git rakudo.parrot
+git clone repos/rakudo.git rakudo.parrot
+git clone repos/nqp.git rakudo.parrot/nqp
+git clone repos/parrot.git rakudo.parrot/parrot
 cd rakudo.parrot
 ln -s ../../roast t/spec
 perl Configure.pl --backends=parrot --gen-parrot

bin/spec.sh

@@ -1,5 +1,4 @@
 #!/bin/sh
 
 rm -rf roast
-mkdir roast
-git clone git://github.com/perl6/roast.git
+git clone repos/roast.git

doit

@@ -1,4 +1,5 @@
 #!/bin/sh
+./bin/git.p5
 nice -20 ./bin/spec.sh
 nice -20 ./bin/pugs.sh
 nice -20 ./bin/niecza.sh