Add the build.sh script

Author: WadeWaldron

build.sh

@@ -0,0 +1,60 @@
+#!/bin/bash
+set -euo pipefail
+IFS=$'\n\t'
+
+EXERCISES_DIR=exercises
+SOLUTIONS_DIR=solutions
+STAGING_DIR=staging
+SCRIPT_DIR=scripts
+
+function help() {
+    echo "Usage:"
+    echo "  build.sh <command>"
+    echo "  Commands:"
+    echo "    validate - Run through each exercise, stage the exercise, then apply the solution. Verify the exercise builds in it's final state."   
+}
+
+function validate() {
+    WORKING_DIR=$(pwd)
+
+    EXERCISES=($(ls $SOLUTIONS_DIR/ | grep "^[0-9]*"))
+
+    TMP_DIR=target/tmp
+    rm -rf $TMP_DIR
+    mkdir -p $TMP_DIR
+
+    cp -r $EXERCISES_DIR $TMP_DIR
+    cp -r $SOLUTIONS_DIR $TMP_DIR
+    cp -r $STAGING_DIR $TMP_DIR 
+
+    cd $TMP_DIR/$EXERCISES_DIR
+
+    for EXERCISE in "${EXERCISES[@]}"
+    do
+        echo "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~"
+        echo $EXERCISE
+        ./exercise.sh stage $EXERCISE
+        ./exercise.sh solve $EXERCISE
+        echo "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~"
+
+        if [ -f "pom.xml" ]; then
+            mvn clean test
+        fi
+    done
+
+    rm -rf $TMP_DIR
+
+    cd $WORKING_DIR
+}
+
+## Determine which command is being requested, and execute it.
+COMMAND=${1:-"help"}
+if [ "$COMMAND" = "validate" ]; then
+    validate
+elif [ "$COMMAND" = "help" ]; then
+    help
+else
+    echo "INVALID COMMAND: $COMMAND"
+    help
+    exit 1
+fi