Script to start and stop local daml-on-sawtooth

1. Add bash script to ensure that daml-on-sawtooth starts cleanly. This
is to avoid any stale keys stopping validator from starting.

2. Update README to reflect use of script.

Signed-off-by: Paul Sitoh <[email protected]>

README.md

@@ -32,9 +32,9 @@ Please refer to [BUILD.md](./BUILD.md) for further instructions.
 
 * Open a terminal and `cd` into the project folder (i.e. location where you git clone the daml-on-sawtooth project) described in step 2.
 
-* To run up a development copy of daml-on-sawtooth, run this command `docker-compose -f ./docker/compose/daml-local.yaml up`. This will start-up single node sawtooth environment, running the devmode consensus and a DAML environment.
+* To run up a development copy of daml-on-sawtooth, and at the top level ot the project, run this command `./docker/run.sh stop`. This will start-up single node sawtooth environment, running the devmode consensus and a DAML environment.
 
-* To shutdown the application by running the following command `docker-compose -f ./docker/compose/daml-local.yaml down`.
+* To shutdown the application by running the following command `./docker/run.sh stop`.
 
 ### 4. Interacting with daml-on-sawtooth using daml navigator
 

docker/run.sh

@@ -0,0 +1,26 @@
+#!/bin/bash
+
+COMMAND=$1
+
+function start(){
+    if [ -d ${PWD}/docker/keys ]; then
+        rm -rf ${PWD}/docker/keys
+    fi
+    docker-compose -f ${PWD}/docker/compose/daml-local.yaml up
+}
+
+function stop(){
+    if [ -d ${PWD}/docker/keys ]; then
+        rm -rf ${PWD}/docker/keys
+    fi
+    docker-compose -f ${PWD}/docker/compose/daml-local.yaml down
+}
+
+case "$COMMAND" in
+    start)
+        start
+        ;;
+    stop)
+        stop
+        ;;
+esac