ndctl: fix rpm source url, switch back to v$VERSION tag scheme

The way to have github generate tarballs in ndctl-$VERSION format while
maintaining a v$VERSION tag scheme is to use a source url in the
following format:

https://github.com/pmem/%{name}/archive/v%{version}.tar.gz#/%{name}-%{version}.tar.gz

Signed-off-by: Dan Williams <[email protected]>

Author: djbw

git-version

@@ -2,9 +2,9 @@
 
 to_ver() {
 	VN=$1
-	#drop leading 'ndctl-' out of the version so its a pure number
-	if [ ${VN:0:6} = "ndctl-" ]; then
-			VN=${VN:6}
+	#drop leading 'v' out of the version so its a pure number
+	if [ ${VN:0:1} = "v" ]; then
+			VN=${VN:1}
 	fi
 	echo $VN
 }
@@ -29,10 +29,10 @@ LF='
 if test -f version; then
 	VN=$(cat version) || VN="$DEF_VER"
 elif test -d ${GIT_DIR:-.git} -o -f .git &&
-	VN=$(git describe --match "ndctl-[0-9]*" --abbrev=7 HEAD 2>/dev/null) &&
+	VN=$(git describe --match "v[0-9]*" --abbrev=7 HEAD 2>/dev/null) &&
 	case "$VN" in
 	*$LF*) (exit 1) ;;
-	ndctl-[0-9]*)
+	v[0-9]*)
 		VN="$(dirty $VN)"
 	esac; then
 	VN=$(echo "$VN" | sed -e 's/-/./g');

ndctl.spec.in

@@ -5,7 +5,7 @@ Summary:	Manage "libnvdimm" subsystem devices (Non-volatile Memory)
 License:	GPLv2
 Group:		System Environment/Base
 Url:		https://github.com/pmem/ndctl
-Source0:	https://github.com/pmem/ndctl/archive/ndctl-%{version}.tar.gz
+Source0:	https://github.com/pmem/%{name}/archive/v%{version}.tar.gz#/%{name}-%{version}.tar.gz
 
 BuildRequires:	autoconf
 BuildRequires:	asciidoc