[PATCH][RFC] Kconfig: show git branch name in LOCALVERSION_AUTO

[Richard Kennedy <richard@rsk.demon.co.uk>]

config option to add the git branch name to the automatically generated
version string.

If the current git branch name is not "master" then add the name to the
LOCALVERSION_AUTO version string.
The format will then be -<name>-gxxxxxxxx

Signed-off-by: Richard Kennedy <richard@rsk.demon.co.uk>
---
 Makefile                |    3 ++-
 init/Kconfig            |   10 ++++++++++
 scripts/setlocalversion |    9 ++++++++-
 3 files changed, 20 insertions(+), 2 deletions(-)

I added this to automatically track which git branch I was on, because I
kept forgetting to change the version string manually. Maybe it will be 
helpful to other people too.

Patch is against v2.6.24-rc8.

comments /suggestions ?

Thanks
Richard


diff --git a/Makefile b/Makefile
index 713f685..ea01118 100644
--- a/Makefile
+++ b/Makefile
@@ -867,7 +867,8 @@ localver = $(subst $(space),, $(string) \
 # checks as needed.
 ifdef CONFIG_LOCALVERSION_AUTO
 	_localver-auto = $(shell $(CONFIG_SHELL) \
-	                  $(srctree)/scripts/setlocalversion $(srctree))
+	                  $(srctree)/scripts/setlocalversion $(srctree) \
+			  $(CONFIG_LOCALVERSION_BRANCH) )
 	localver-auto  = $(LOCALVERSION)$(_localver-auto)
 endif
 
diff --git a/init/Kconfig b/init/Kconfig
index b9d11a8..fafb7e5 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -92,6 +92,16 @@ config LOCALVERSION_AUTO
 
 	  which is done within the script "scripts/setlocalversion".)
 
+config LOCALVERSION_BRANCH
+	bool "Automatically add branch name to the version string"
+	default n
+	depends on LOCALVERSION_AUTO
+	help
+	  If the current git branch name is not "master" then add the name to
+	  the LOCALVERSION_AUTO version string.
+	  The format will then be -<name>-gxxxxxxxx
+	  see the help for LOCALVERSION_AUTO for more details
+
 config SWAP
 	bool "Support for paging of anonymous memory (swap)"
 	depends on MMU && BLOCK
diff --git a/scripts/setlocalversion b/scripts/setlocalversion
index 82e4993..1fffa2d 100644
--- a/scripts/setlocalversion
+++ b/scripts/setlocalversion
@@ -2,7 +2,7 @@
 # Print additional version information for non-release trees.
 
 usage() {
-	echo "Usage: $0 [srctree]" >&2
+	echo "Usage: $0 [srctree] [show_branch]" >&2
 	exit 1
 }
 
@@ -10,6 +10,13 @@ cd "${1:-.}" || usage
 
 # Check for git and a git repo.
 if head=`git rev-parse --verify HEAD 2>/dev/null`; then
+
+	if [[ $2 == "y" ]]; then
+		name=`git branch | grep -E "^[*]" | cut -d " " -sf 2`
+		if [[ $name != "master" ]]; then
+			printf '%s' "-$name"
+		fi
+	fi
 	# Do we have an untagged version?
 	if git name-rev --tags HEAD | grep -E '^HEAD[[:space:]]+(.*~[0-9]*|undefined)$' > /dev/null; then
 		printf '%s%s' -g `echo "$head" | cut -c1-8`
-- 
1.5.3.7