Add a dep.sh file to check whether all required dependencies are installed

scripts/cores.sh

@@ -0,0 +1,11 @@
+#!/bin/bash
+
+if [[ "$OSTYPE" == "linux-gnu"* ]]; then
+   CORES=`grep ^cpu\\scores /proc/cpuinfo | uniq |  awk '{print $4}'`
+elif [[ "$OSTYPE" == "darwin"* ]]; then
+   CORES=`sysctl -n hw.ncpu`
+else
+	CORES=?
+fi
+
+echo $CORES

scripts/deps.sh

@@ -0,0 +1,39 @@
+DEPS=(
+	echo
+	git
+	date
+	wc
+	grep
+	awk
+	uniq
+	sha256sum
+	zip 
+	tar
+	sqlite3
+	admesh
+	openscad
+)
+
+for dep in ${DEPS[@]}; do
+	if ! command -v "${dep}" &> /dev/null
+	then
+	    echo "Application ${dep} could not be found"
+	    echo "Please install ${dep} before running the build script"
+	    if [[ "${dep}" == "admesh" ]]; then
+	    	echo "For more information about how to install admesh https://github.com/admesh/admesh"
+	    	echo "OR https://www.howtoinstall.me/ubuntu/18-04/admesh/"
+	    fi
+	    echo "Individual .scad files can be compiled directly without this script"
+	    exit 1
+	fi
+done
+
+echo "All dependencies are installed"
+
+VERSION=`bash ./scripts/version.sh`
+CPU=`bash ./scripts/cpu.sh`
+CORES=`bash ./scripts/cores.sh`
+
+echo "CPU: (${CORES}x) ${CPU}"
+echo "OpenSCAD: ${VERSION}"
+