[Buildroot] [PATCH] Improved git download method performance.

[Theodore Witkamp]

Instead of cloning the a complete repository, git archive is used first.
If git archive fails because the remote host does not support it, git clone is
used with with --depth 1 so only minimal history is copied.

Also the $($(PKG)_SOURCE) default is changed to .tar instead of .tar.gz.
This removes unneeded compression and decompression.

Relative file paths are now relative to $(TOPDIR) not $(DL_DIR).
---
 package/Makefile.package.in |   35 ++++++++++++++++++++---------------
 1 files changed, 20 insertions(+), 15 deletions(-)

diff --git a/package/Makefile.package.in b/package/Makefile.package.in
index e85eb15..14f1ba1 100644
--- a/package/Makefile.package.in
+++ b/package/Makefile.package.in
@@ -146,14 +146,14 @@ domainseparator=$(if $(1),$(1),/)
 
 define DOWNLOAD_GIT
 	test -e $(DL_DIR)/$($(PKG)_SOURCE) || \
-	(pushd $(DL_DIR) > /dev/null && \
-	$(GIT) clone --bare $($(PKG)_SITE) $($(PKG)_BASE_NAME) && \
-	pushd $($(PKG)_BASE_NAME) > /dev/null && \
-	$(GIT) archive --format=tar --prefix=$($(PKG)_BASE_NAME)/ $($(PKG)_DL_VERSION) | \
-		gzip -c > $(DL_DIR)/$($(PKG)_SOURCE) && \
-	popd > /dev/null && \
-	rm -rf $($(PKG)_DL_DIR) && \
-	popd > /dev/null)
+	$(GIT) archive --format=tar --remote $($(PKG)_SITE) --prefix=$($(PKG)_BASE_NAME)/ $($(PKG)_DL_VERSION) \
+	> $(DL_DIR)/$($(PKG)_SOURCE) || \
+	( \
+	$(GIT) clone   -v --depth 1 --bare $($(PKG)_SITE) $($(PKG)_DL_DIR)   &&  \
+	$(GIT) archive --format=tar --remote $($(PKG)_DL_DIR) --prefix=$($(PKG)_BASE_NAME)/ $($(PKG)_DL_VERSION) \
+	> $(DL_DIR)/$($(PKG)_SOURCE) && \
+	rm -rf $($(PKG)_DL_DIR)  \
+	)
 endef
 
 # TODO: improve to check that the given PKG_DL_VERSION exists on the remote
@@ -504,13 +504,6 @@ ifneq ($$($(2)_OVERRIDE_SRCDIR),)
 $(2)_VERSION = custom
 endif
 
-ifndef $(2)_SOURCE
- ifdef $(3)_SOURCE
-  $(2)_SOURCE = $($(3)_SOURCE)
- else
-  $(2)_SOURCE			?= $$($(2)_BASE_NAME).tar.gz
- endif
-endif
 
 ifndef $(2)_PATCH
  ifdef $(3)_PATCH
@@ -536,6 +529,18 @@ ifndef $(2)_SITE_METHOD
  endif
 endif
 
+ifndef $(2)_SOURCE
+ ifdef $(3)_SOURCE
+  $(2)_SOURCE = $($(3)_SOURCE)
+ else
+  ifeq ($$($(2)_SITE_METHOD),git)
+   $(2)_SOURCE			?= $$($(2)_BASE_NAME).tar
+  else
+   $(2)_SOURCE			?= $$($(2)_BASE_NAME).tar.gz
+  endif
+ endif
+endif
+
 ifeq ($$($(2)_SITE_METHOD),local)
 ifeq ($$($(2)_OVERRIDE_SRCDIR),)
 $(2)_OVERRIDE_SRCDIR = $($(2)_SITE)
-- 
1.7.4.1