Make flashall safer to use.

I've bricked Beast a few times because flashing failed, yet the script
continued to reboot the device. It's happened to me that I'm in the
wrong directory.

- Always use image files in the same directory as flash-all.sh.
- Abort execution when any command fails (set -e).

Test: Flashed Beast from a local build.

Change-Id: I6f12afbf3747a29a135961464d9579d66d04472e

1 files changed, 5 insertions, 2 deletions

diff --git a/flash-all.sh b/flash-all.sh
index 822d309..96397a9 100755
--- a/flash-all.sh
+++ b/flash-all.sh
@@ -14,6 +14,9 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+set -e
+cd $(dirname $0)
+
 lflag="unlock"
 if [[ $# -gt 0 ]]; then
     lflag="$1"
@@ -31,7 +34,8 @@ fi
 
 if [ "$skipreboot" != "skip" ]
 then
-    adb $sern reboot fastboot
+    # Ignore failure, in case we are already in fastboot.
+    adb $sern reboot fastboot || true
 fi
 
 function flash_with_retry() {
@@ -44,7 +48,6 @@ function flash_with_retry() {
     fastboot ${sern} reboot-bootloader
     fastboot ${sern} flash ${partition} ${img}
   fi
-  return 1
 }
 
 fastboot $sern flashing unlock_critical