abuild: simplify optional git usage

set git=true if git is missing so all git commands are ignored. This
simplifies the code a bit

abuild.in

@@ -12,7 +12,7 @@ sysconfdir=@sysconfdir@
 datadir=@datadir@
 
 abuild_path=$(readlink -f $0)
-git_path=$(command -v git || true)
+git=$(command -v git) || git=true
 
 if ! [ -f "$datadir/functions.sh" ]; then
 	echo "$datadir/functions.sh: not found" >&2
@@ -809,14 +809,12 @@ prepare_language_packs() {
 
 # echo '-dirty' if git is not clean
 git_dirty() {
-	[ -z "$git_path" ] && return
-	[ $(git status -s "$startdir" | wc -l) -ne 0 ] && echo "-dirty"
+	[ $($git status -s "$startdir" | wc -l) -ne 0 ] && echo "-dirty"
 }
 
 # echo last commit hash id
 git_last_commit() {
-	[ -z "$git_path" ] && return
-	git log --format=oneline -n 1 "$startdir" | awk '{print $1}'
+	$git log --format=oneline -n 1 "$startdir" | awk '{print $1}'
 }
 
 get_maintainer() {
@@ -1546,11 +1544,7 @@ update_abuildrepo_index() {
 	subpkg_unset
 
 	if [ -z "$DESCRIPTION" ]; then
-		if [ -n "$git_path" ]; then
-			DESCRIPTION="$repo $(cd $startdir && git describe)"
-		else
-			DESCRIPTION="$repo"
-		fi
+		DESCRIPTION="$repo $(cd $startdir && $git describe)"
 	fi
 
 	for i in $allarch; do
@@ -2404,7 +2398,7 @@ snapshot() {
 	# clone git repo and archive
 	if [ -n "$giturl" ]; then
 		local _version=${verbase:-0}_git${_date}
-		[ -z "$git_path" ] &&  die "Missing git! Install git to support git clone."
+		[ "$git" = "true" ] &&  die "Missing git! Install git to support git clone."
 		local _rev="${reporev:-HEAD}"
 		[ "$_rev" = "HEAD" ] && local _depth="--depth=1"
 		msg "Creating git snapshot: $pkgname-$_version"