scripts: imp code

scripts/make/version.sh

@@ -68,15 +68,6 @@ get_last_minor_zero() {
 		| head -n 1
 }
 
-# get_last_release returns the most recent release tag, regardless whether it's
-# patch, minor, or major one.
-get_last_release() {
-	git tag\
-		| grep -e 'v[0-9]\+\.[0-9]\+\.[0-9]\+$'\
-		| sort -k 1.2,1nr -k 2,2nr -k 3,3nr -t '.'\
-		| head -n 1
-}
-
 channel="${CHANNEL:?please set CHANNEL}"
 readonly channel
 
@@ -141,8 +132,9 @@ in
 	# This pseudo-channel is used to set a proper versions into release
 	# candidate builds.
 
-	# last_release is the name of the previous release version's tag.
-	last_release="$( get_last_release )"
+	# last_tag is expected to be the latest release tag.
+	last_tag="$( git describe --abbrev=0 )"
+	readonly last_tag
 
 	# current_branch is the name of the branch currently checked out.
 	current_branch="$( git rev-parse --abbrev-ref HEAD )"
@@ -159,11 +151,7 @@ in
 		exit 1
 	fi
 
-	# release_version is the final version of this release candidate.
-	release_version="$( echo "$current_branch" | cut -d '-' -f 2 )"
-	readonly release_version
-
-	version="${release_version}-rc.$( git rev-list --count "$last_release"..HEAD )"
+	version="${current_branch#rc-}-rc.$( git rev-list --count "$last_tag"..HEAD )"
 	;;
 (*)
 	echo "invalid channel '$channel', supported values are\