From 7c954c8e61e7f0e2302ebd4ed87c326de5b0a1fa Mon Sep 17 00:00:00 2001
From: "Kai Tetzlaff (NSN/LinSEE)" <kai.tetzlaff@web.de>
Date: Wed, 25 Sep 2013 11:02:11 +0200
Subject: [PATCH] add support for git clone without checkout to e.g. allow
 configuring sparse checkouts

---
 vcs.mk | 22 +++++++++++++---------
 1 file changed, 13 insertions(+), 9 deletions(-)

diff --git a/vcs.mk b/vcs.mk
index ceedd4a..48e4f64 100644
--- a/vcs.mk
+++ b/vcs.mk
@@ -14,13 +14,13 @@ all: updaterepos
 %/initrepos:
 	$(MAKE) -C $* $(@F)
 
-HG  := hg
-GIT := git
-BZR := bzr
-SVN := svn
-#BZR := $(or $(patsubst %,"%",$(subst /,$(DIRSEP),$(wildcard c:/Program?Files/Bazaar/bzr.exe))),bzr)
-CVS := $(or $(patsubst %,"%",$(subst /,$(DIRSEP),$(wildcard c:/Program?Files/CVS?Suite/cvs.exe))),cvs)
-#CVS := evs
+HG  ?= hg
+GIT ?= git
+BZR ?= bzr
+SVN ?= svn
+#BZR ?= $(or $(patsubst %,"%",$(subst /,$(DIRSEP),$(wildcard c:/Program?Files/Bazaar/bzr.exe))),bzr)
+CVS ?= $(or $(patsubst %,"%",$(subst /,$(DIRSEP),$(wildcard c:/Program?Files/CVS?Suite/cvs.exe))),cvs)
+#CVS ?= evs
 
 CVSFLAGS := $(shell cvs --lf --version 2>$(NULL) >$(NULL)&&echo --lf)
 CVSUP_FLAGS := -CPd
@@ -126,7 +126,11 @@ define GIT_TMPL
 			@echo ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 			$(RD) $(subst /,$(DIRSEP),$1)
 			$$(pre_init_cmd-$1)
-			$(GIT) clone $2 $1
+			$(GIT) clone --verbose $(if $(GITCLONE_FLAGS-$1),$(GITCLONE_FLAGS-$1)$(sp))$2 $1
+      ifneq (,$(filter -n --no-checkout,$(GITCLONE_FLAGS-$1)))
+				$$(post_clone_cmd-$1)
+				cd $(subst /,$(DIRSEP),$1) && $(GIT) checkout
+      endif
 			$$(post_init_cmd-$1)
 
     pull-$1:
@@ -134,7 +138,7 @@ define GIT_TMPL
 			@echo +++ Updating[git]: $$(patsubst pull-%,%,$$@) $(SHQ)($2$(SHQ))
 			@echo ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 			$$(pre_up_cmd-$1)
-			@cd $(subst /,$(DIRSEP),$1) >$(NULL) 2>&1 && $(GIT) pull $(GITPULL_FLAGS)
+			$(GIT) --work-tree $1 pull $(GITPULL_FLAGS)
 			$$(post_up_cmd-$1)
 
   endif