default to device type of last build if no device type is given

platform_tools/android/bin/android_setup.sh

 #!/bin/bash
 #
 # android_setup.sh: Sets environment variables used by other Android scripts.
 
 # Parse the arguments for a DEVICE_ID.
 DEVICE_ID=""
 DEVICE_SERIAL=""
 while (( "$#" )); do
   if [[ $(echo "$1" | grep "^-d$") != "" ]];
   then
     DEVICE_ID=$2
     shift
   elif [[ "$1" == "-s" ]];
   then
     if [[ $# -lt 2 ]];
     then
       echo "ERROR: missing serial number"
       exit 1;
     fi
     DEVICE_SERIAL="-s $2"
     shift
   else
     APP_ARGS=("${APP_ARGS[@]}" "${1}")
   fi
 
   shift
 done
 
+if [ -z "$DEVICE_ID" ]

[borenet, 2013/08/19 20:30:50]

Why not do this block where the previous default was set?  That way, if "-d" is
supplied, it can take precedence over either default.

+then
+
+    if [ ! -f .android_config ]
+    then
+        DEVICE_ID="arm_v7"
+        echo "INFO: no target device type was specified so using the default 'arm_v7'"

[borenet, 2013/08/19 20:30:50]

Use "${DEVICE_ID}" instead of "arm_v7"?

+    else
+        DEVICE_ID=$(cat .android_config)
+        echo "INFO: no target device type was specified so using the device from the most recent build"

[borenet, 2013/08/19 20:30:50]

Include $DEVICE_ID?

+    fi
+fi
+
 function exportVar {
   NAME=$1
   VALUE=$2
   echo export $NAME=\"$VALUE\"
   export $NAME="$VALUE"
 }
 
 SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
 
 # A valid Android SDK installation is required to build the sample app.
@@ skipping 114 matching lines @@
 setup_device() {
   DEFINES="OS=android"
   DEFINES="${DEFINES} host_os=$(uname -s | sed -e 's/Linux/linux/;s/Darwin/mac/')"
   DEFINES="${DEFINES} skia_os=android"
   DEFINES="${DEFINES} android_base=${SCRIPT_DIR}/.."
   DEFINES="${DEFINES} skia_shared_lib=1"
 
   # Setup the build variation depending on the target device
   TARGET_DEVICE="$1"
 
-  if [ -z "$TARGET_DEVICE" ]; then
-    echo "INFO: no target device type was specified so using the default 'arm_v7'"
-    TARGET_DEVICE="arm_v7"
-  fi
-
   case $TARGET_DEVICE in
     nexus_s)
       DEFINES="${DEFINES} skia_arch_type=arm arm_neon=1 arm_version=7 arm_thumb=1"
       DEFINES="${DEFINES} skia_texture_cache_mb_limit=24"
       ANDROID_ARCH="arm"
       ;;
     nexus_4 | nexus_7 | nexus_10)
       DEFINES="${DEFINES} skia_arch_type=arm arm_neon=1 arm_version=7 arm_thumb=1"
       ANDROID_ARCH="arm"
       ;;
@@ skipping 128 matching lines @@
   else
     $ADB $DEVICE_SERIAL push $HOST_SRC $ANDROID_DST
   fi
 }
 
 # Set up the device.
 setup_device "${DEVICE_ID}"
 if [[ "$?" != "0" ]]; then
   exit 1
 fi