envsetup: eat safely

Change-Id: I2d8b52206213d8f4d8dcce3518cadb2be59e78d8

envsetup.sh

@@ -630,16 +630,22 @@ function eat()
     if [ "$OUT" ] ; then
         MODVERSION=`sed -n -e'/ro\.modversion/s/^.*CyanogenMod-//p' $OUT/system/build.prop`
         ZIPFILE=$OUT/update-cm-$MODVERSION-signed.zip
+        if [ $(adb get-state) != device ] ; then
+            echo "No device is online. Waiting for one..."
+            adb wait-for-device
+        fi
         echo "Pushing update-cm-$MODVERSION-signed.zip to device"
-        adb push $ZIPFILE /mnt/sdcard/
-        cat << EOF > /tmp/extendedcommand
+        if adb push $ZIPFILE /mnt/sdcard/ ; then
+            cat << EOF > /tmp/extendedcommand
 ui_print("Nom nom nom nom...");
 install_zip("/sdcard/update-cm-$MODVERSION-signed.zip");
 EOF
-        adb push /tmp/extendedcommand /cache/recovery/
-        rm /tmp/extendedcommand
-        echo "Rebooting into recovery for installation"
-        adb reboot recovery
+            if adb push /tmp/extendedcommand /cache/recovery/ ; then
+                echo "Rebooting into recovery for installation"
+                adb reboot recovery
+            fi
+            rm /tmp/extendedcommand
+        fi
     else
         echo "Nothing to eat"
         return 1