Dynamic subcommands call + help

Author: dmius

nancy.sh

@@ -3,21 +3,39 @@
 cmd=""
 
 case "$1" in
-    run )  
-        cmd="./nancy_run.sh"
-        shift
-        ;;
-    workload ) 
-        cmd="./nancy_workload.sh"
-        shift
-        ;;
     help )
-        echo "Here will be help! Comming soon."
+        echo -e "
+\033[1mDESCRIPTION\033[22m
+
+	The Nancy Command Line Interface is a unified way to manage
+	database experiments.
+
+	Nancy is a member of Postgres.ai's Artificial DBA team
+	responsible for conducting experiments.
+
+\033[1mSYNOPSYS\033[22m
+
+	  nancy <command> [parameters]
+
+\033[1mAVAILABLE COMMANDS\033[22m
+
+	* help
+
+	* prepare-database
+
+	* prepare-workload
+
+	* run
+"
         exit 1;
         ;;
     * ) 
-        >&2 echo "ERROR: Unknown command."
-        exit 1;
+        if [ ! -f "./nancy_$1.sh" ]
+        then
+            >&2 echo "ERROR: Unknown command."
+            exit 1;
+        fi
+        cmd="./nancy_$1.sh"
     ;;
 esac