installing git when wget_semver first time

tools/wget_semver

@@ -3,7 +3,7 @@
 REPO_TYPE=$1
 REPO_NAME=$2
 
-function usage {
+function usage() {
 	local BASECMD=$(basename "$0")
 	echo 'usage: <REPO_TYPE> <REPO_NAME> [DESTINATION]'
 	echo 'example:'
@@ -14,42 +14,44 @@ function usage {
 	exit -1
 }
 
-function get_github {
-	local all_releases=$( git ls-remote --tags --sort="v:refname" git://github.com/$REPO_NAME )
+function get_github() {
+	local all_releases=$(git ls-remote --tags --sort="v:refname" git://github.com/$REPO_NAME)
 
 	# extract only VERSION without 'v'
-	local non_v_release=$( echo "$all_releases" \
-		| grep -v "refs/tags/v" | grep -v dev | grep -v rc | tail -n1 | cut -f2 | cut -d '/' -f3 )
+	local non_v_release=$(echo "$all_releases" |
+		grep -v "refs/tags/v" | grep -v dev | grep -v rc | tail -n1 | cut -f2 | cut -d '/' -f3)
 	non_v_release=${non_v_release%^\{\}} # remove extra characters ^{} from github
 	[ -n "$non_v_release" ] && echo $non_v_release && return
-	
+
 	# extract remaining version including 'v'
-	local v_release=$( echo "$all_releases" \
-		| grep -v dev | grep -v rc | tail -n1 | cut -f2 | cut -d '/' -f3 )
+	local v_release=$(echo "$all_releases" |
+		grep -v dev | grep -v rc | tail -n1 | cut -f2 | cut -d '/' -f3)
 	v_release=${v_release%^\{\}} # remove extra characters ^{} from github
 	echo $v_release
 }
 
-function get_artcode {
-	release=$( git ls-remote --tags --sort="v:refname" \
-		https://git.artcode.re/$REPO_NAME \
-		| tail -n1 | cut -f2 | cut -d '/' -f3 )
+function get_artcode() {
+	release=$(git ls-remote --tags --sort="v:refname" \
+		https://git.artcode.re/$REPO_NAME |
+		tail -n1 | cut -f2 | cut -d '/' -f3)
 	echo $release
 }
 
-
 [[ $# -ne 2 ]] && usage
 
+if [ -z "$(command -v git)" ]; then
+	echo "INSTALLING PACKAGE <GIT> required"
+	sudo apt install -y git
+fi
+
 case $REPO_TYPE in
-	github )
-		get_github
-		;;
-	artcode )
-		get_artcode
-		;;
-	* )
-		echo "repository type <${REPO_TYPE}> not yet supported!" && exit 1
-		;;
+github)
+	get_github
+	;;
+artcode)
+	get_artcode
+	;;
+*)
+	echo "repository type <${REPO_TYPE}> not yet supported!" && exit 1
+	;;
 esac
-
-