Make: update setlocalversion from the kernel

This syncs the localversion generation with the kernel.

At least one effect is that a barebox built from a tar archive no
longer marks itself as dirty. Also it moves some stuff from a scary
Makefile to a not-so-scary shell script.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 149 insertions, 43 deletions

diff --git a/scripts/setlocalversion b/scripts/setlocalversion
index 83b75126c9..cce4706cc1 100755
--- a/scripts/setlocalversion
+++ b/scripts/setlocalversion
@@ -1,65 +1,171 @@
 #!/bin/sh
-# Print additional version information for non-release trees.
+#
+# This scripts adds local version information from the version
+# control systems git, mercurial (hg) and subversion (svn).
+#
 
 usage() {
-	echo "Usage: $0 [srctree]" >&2
+	echo "Usage: $0 [--save-scmversion] [srctree]" >&2
 	exit 1
 }
 
-cd "${1:-.}" || usage
+scm_only=false
+srctree=.
+if test "$1" = "--save-scmversion"; then
+	scm_only=true
+	shift
+fi
+if test $# -gt 0; then
+	srctree=$1
+	shift
+fi
+if test $# -gt 0 -o ! -d "$srctree"; then
+	usage
+fi
 
-# Check for git and a git repo.
-if head=`git rev-parse --verify HEAD 2>/dev/null`; then
-	# Do we have an untagged version?
-	if git name-rev --tags HEAD | grep -E '^HEAD[[:space:]]+(.*~[0-9]*|undefined)$' > /dev/null; then
-		if tag=`git describe 2>/dev/null`; then
-			echo $tag | awk -F- '{printf("-%05d-%s", $(NF-1),$(NF))}'
-		fi
-	fi
+scm_version()
+{
+	local short
+	short=false
 
-	# Are there uncommitted changes?
-	git update-index --refresh --unmerged > /dev/null
-	if git diff-index --name-only HEAD | grep -v "^scripts/package" \
-	    | read dummy; then
-		printf '%s' -dirty
+	cd "$srctree"
+	if test -e .scmversion; then
+		cat .scmversion
+		return
+	fi
+	if test "$1" = "--short"; then
+		short=true
 	fi
 
-	# All done with git
-	exit
-fi
+	# Check for git and a git repo.
+	if test -d .git && head=`git rev-parse --verify --short HEAD 2>/dev/null`; then
 
-# Check for mercurial and a mercurial repo.
-if hgid=`hg id 2>/dev/null`; then
-	tag=`printf '%s' "$hgid" | cut -d' ' -f2`
+		# If we are at a tagged commit (like "v2.6.30-rc6"), we ignore
+		# it, because this version is defined in the top level Makefile.
+		if [ -z "`git describe --exact-match 2>/dev/null`" ]; then
 
-	# Do we have an untagged version?
-	if [ -z "$tag" -o "$tag" = tip ]; then
-		id=`printf '%s' "$hgid" | sed 's/[+ ].*//'`
-		printf '%s%s' -hg "$id"
+			# If only the short version is requested, don't bother
+			# running further git commands
+			if $short; then
+				echo "+"
+				return
+			fi
+			# If we are past a tagged commit (like
+			# "v2.6.30-rc5-302-g72357d5"), we pretty print it.
+			if atag="`git describe 2>/dev/null`"; then
+				echo "$atag" | awk -F- '{printf("-%05d-%s", $(NF-1),$(NF))}'
+
+			# If we don't have a tag at all we print -g{commitish}.
+			else
+				printf '%s%s' -g $head
+			fi
+		fi
+
+		# Is this git on svn?
+		if git config --get svn-remote.svn.url >/dev/null; then
+			printf -- '-svn%s' "`git svn find-rev $head`"
+		fi
+
+		# Update index only on r/w media
+		[ -w . ] && git update-index --refresh --unmerged > /dev/null
+
+		# Check for uncommitted changes
+		if git diff-index --name-only HEAD | grep -qv "^scripts/package"; then
+			printf '%s' -dirty
+		fi
+
+		# All done with git
+		return
 	fi
 
-	# Are there uncommitted changes?
-	# These are represented by + after the changeset id.
-	case "$hgid" in
-		*+|*+\ *) printf '%s' -dirty ;;
-	esac
+	# Check for mercurial and a mercurial repo.
+	if test -d .hg && hgid=`hg id 2>/dev/null`; then
+		# Do we have an tagged version?  If so, latesttagdistance == 1
+		if [ "`hg log -r . --template '{latesttagdistance}'`" == "1" ]; then
+			id=`hg log -r . --template '{latesttag}'`
+			printf '%s%s' -hg "$id"
+		else
+			tag=`printf '%s' "$hgid" | cut -d' ' -f2`
+			if [ -z "$tag" -o "$tag" = tip ]; then
+				id=`printf '%s' "$hgid" | sed 's/[+ ].*//'`
+				printf '%s%s' -hg "$id"
+			fi
+		fi
 
-	# All done with mercurial
-	exit
-fi
+		# Are there uncommitted changes?
+		# These are represented by + after the changeset id.
+		case "$hgid" in
+			*+|*+\ *) printf '%s' -dirty ;;
+		esac
 
-# Check for svn and a svn repo.
-if rev=`svn info 2>/dev/null | grep '^Revision'`; then
-	rev=`echo $rev | awk '{print $NF}'`
-	changes=`svn status 2>/dev/null | grep '^[AMD]' | wc -l`
+		# All done with mercurial
+		return
+	fi
 
-	# Are there uncommitted changes?
-	if [ $changes != 0 ]; then
-		printf -- '-svn%s%s%s' "$rev" -dirty "$changes"
-	else
+	# Check for svn and a svn repo.
+	if rev=`svn info 2>/dev/null | grep '^Last Changed Rev'`; then
+		rev=`echo $rev | awk '{print $NF}'`
 		printf -- '-svn%s' "$rev"
+
+		# All done with svn
+		return
 	fi
+}
 
-	# All done with svn
+collect_files()
+{
+	local file res
+
+	for file; do
+		case "$file" in
+		*\~*)
+			continue
+			;;
+		esac
+		if test -e "$file"; then
+			res="$res$(cat "$file")"
+		fi
+	done
+	echo "$res"
+}
+
+if $scm_only; then
+	if test ! -e .scmversion; then
+		res=$(scm_version)
+		echo "$res" >.scmversion
+	fi
 	exit
 fi
+
+if test -e include/config/auto.conf; then
+	. include/config/auto.conf
+else
+	echo "Error: kernelrelease not valid - run 'make prepare' to update it"
+	exit 1
+fi
+
+# localversion* files in the build and source directory
+res="$(collect_files localversion*)"
+if test ! "$srctree" -ef .; then
+	res="$res$(collect_files "$srctree"/localversion*)"
+fi
+
+# CONFIG_LOCALVERSION and LOCALVERSION (if set)
+res="${res}${CONFIG_LOCALVERSION}${LOCALVERSION}"
+
+# scm version string if not at a tagged commit
+if test "$CONFIG_LOCALVERSION_AUTO" = "y"; then
+	# full scm version string
+	res="$res$(scm_version)"
+else
+	# append a plus sign if the repository is not in a clean
+	# annotated or signed tagged state (as git describe only
+	# looks at signed or annotated tags - git tag -a/-s) and
+	# LOCALVERSION= is not specified
+	if test "${LOCALVERSION+set}" != "set"; then
+		scm=$(scm_version --short)
+		res="$res${scm:++}"
+	fi
+fi
+
+echo "$res"