Add Unix shell script to wrap EasyBuild

EasyBuild

@@ -13,3 +13,8 @@ End
 
 Make -w -d Sources=: -f "{MAKE_FILE}" RomMondo > "{MAKE_OUT}"
 "{MAKE_OUT}"
+
+# So that RomMondo is definitely the newest thing in the tree!
+SetDirectory :BuildResults:RISC:Image:
+Catenate RomMondo > RomMondoX
+Rename -y RomMondoX RomMondo

EasyBuild.sh

@@ -0,0 +1,19 @@
+#!/bin/sh
+
+# Avoid the uber-slow step of running the emulator when nothing has changed
+
+if [ ! -f BuildResults/RISC/Image/RomMondo ]
+then
+	echo "RomMondo not yet built"
+	echo "> Starting emulator to build RomMondo"
+	empw EasyBuild
+	echo "< Emulator done"
+	exit
+fi
+
+echo "Checking for files updated since RomMondo"
+find . ! -regex '.*/\..*' ! -iname '*.dmg' -newer BuildResults/RISC/Image/RomMondo | grep . || exit 0
+
+echo "> Starting emulator to build RomMondo"
+empw EasyBuild
+echo "< Emulator done"

README.md

@@ -51,6 +51,10 @@ Using EMPW, that's:
 
 	empw EasyBuild
 
+Even nicer is this Unix shell script, which avoids unnecessary launches of the emulator:
+
+	./EasyBuild.sh
+
 The 3 MB image will be at `BuildResults/RISC/Image/RomMondo`.
 
 What's next?