Trader demo: use a start script instead of Gradle, which simplifies setup.

It also stops Gradle messing with the console output.

build.gradle

@@ -110,16 +110,3 @@ tasks.withType(JavaExec) {
     jvmArgs "-javaagent:${configurations.quasar.singleFile}"
     jvmArgs "-Dco.paralleluniverse.fibers.verifyInstrumentation"
 }
-
-
-task runDemoBuyer(type: JavaExec, dependsOn: ':classes') {
-    classpath = sourceSets.main.runtimeClasspath
-    main = 'core.node.TraderDemoKt'
-    args = ['--dir=buyer', '--service-fake-trades', '--network-address=localhost']
-}
-
-task runDemoSeller(type: JavaExec, dependsOn: ':classes') {
-    classpath = sourceSets.main.runtimeClasspath
-    main = 'core.node.TraderDemoKt'
-    args = ['--dir=seller', '--fake-trade-with=localhost', '--network-address=localhost:31338', '--timestamper-identity-file=buyer/identity-public', '--timestamper-address=localhost']
-}

docs/source/running-the-trading-demo.rst

@@ -9,20 +9,20 @@ let us know.
 
 Now, open two terminals, and in the first run:::
 
-    ./gradlew runDemoBuyer
+    ./scripts/trader-demo.sh buyer
 
-It will create a directory named "buyer" and ask you to edit the configuration file inside. Open up ``buyer/config``
-in your favourite text editor and give the node a legal identity of "Big Buyer Corp, Inc" or whatever else you feel like.
-The actual text string is not important. Now run the gradle command again, and it should start up and wait for
-a seller to connect.
+It will compile things, if necessary, then create a directory named "buyer" with a bunch of files inside and start
+the node. You should see it waiting for a trade to begin.
 
 In the second terminal, run::
 
-    ./gradlew runDemoSeller
-
-and repeat the process, this time calling the node ... something else.
+    ./scripts/trader-demo.sh seller
 
 You should see some log lines scroll past, and within a few seconds the messages "Purchase complete - we are a
 happy customer!" and "Sale completed - we have a happy customer!" should be printed.
 
 If it doesn't work, jump on the mailing list and let us know.
+
+For Windows users, the contents of the shell script are very trivial and can easily be done by hand from a command
+window. Essentially, it just runs Gradle to create the startup scripts, and then starts the node with one set of
+flags or another.

scripts/trader-demo.sh

@@ -0,0 +1,33 @@
+#!/bin/bash
+
+mode=$1
+
+if [ ! -e ./gradlew ]; then
+    echo "Run from the root directory please"
+    exit 1
+fi
+
+if [ ! -d build/install/r3prototyping ]; then
+    ./gradlew installDist
+fi
+
+if [[ "$mode" == "buyer" ]]; then
+    if [ ! -d buyer ]; then
+        mkdir buyer
+        echo "myLegalName = Bank of Zurich" >buyer/config
+    fi
+
+    build/install/r3prototyping/bin/r3prototyping --dir=buyer --service-fake-trades --network-address=localhost
+elif [[ "$mode" == "seller" ]]; then
+    if [ ! -d seller ]; then
+        mkdir seller
+        echo "myLegalName = Bank of Giza" >seller/config
+    fi
+
+    build/install/r3prototyping/bin/r3prototyping --dir=seller --fake-trade-with=localhost --network-address=localhost:31338 --timestamper-identity-file=buyer/identity-public --timestamper-address=localhost
+else
+    echo "Run like this, one in each tab:"
+    echo
+    echo "  scripts/trader-demo.sh buyer"
+    echo "  scripts/trader-demo.sh seller"
+fi