main.bash: introduce and check own tool dependencies

Fixings #207

Author: AntonOks

lib/main.bash

@@ -6,6 +6,11 @@ source "$(dirname "${BASH_SOURCE[0]}")/util.bash"
 # shellcheck source=lib/logging.bash
 source "$(dirname "${BASH_SOURCE[0]}")/logging.bash"
 
+
+RSTAR_DEPS_BIN+=(
+  git
+)
+
 main() {
 	[[ -z $1 ]] && usage && exit 2
 
@@ -297,4 +302,6 @@ discover_system_os() {
 	fi
 }
 
+depcheck_bin || exit 305 # check my own tool dependencies first
+
 main "$@"