*.sh: Handle unset environment variables and adjust commandline handling

build.sh

@@ -1,6 +1,6 @@
-#!/bin/bash -eu
+#!/bin/bash
 
-set -e
+set -eu
 
 SOURCE_LOCATION="`dirname \"$0\"`"
 SOURCE_LOCATION="`( cd \"${SOURCE_LOCATION}\" && pwd )`"
@@ -24,7 +24,7 @@ do
     fi
 done
 
-if [ "${BUILD_EXTRAS}" == "1" ]; then
+if [ "${BUILD_EXTRAS:-0}" == "1" ]; then
     cd ${SOURCE_LOCATION}
     echo "------building example------"
     mkdir -p example-build

install.sh

@@ -1,6 +1,6 @@
 #!/bin/sh
 
-set -e
+set -eu
 
 export DO_INSTALL=1
 

run.sh

@@ -1,17 +1,20 @@
 #!/bin/sh
 
-set -e
+set -eu
 
 SOURCE_LOCATION="`dirname \"$0\"`"
 SOURCE_LOCATION="`( cd \"${SOURCE_LOCATION}\" && pwd )`"
 
 cd ${SOURCE_LOCATION}
 
 application=openambit
-if test -n "$1"; then
-     application=$1
-     shift
+
+if [ $# -gt 0 ];then
+    echo running $1
+    application=$1
+    shift
 fi
+
 case "$application" in
     openambit)          builddir=${application}-build;;
     ambitconsole)       builddir=example-build;;