From b6ba3db100676adaba2d928d5430a0530bf50610 Mon Sep 17 00:00:00 2001
From: Attila Lendvai <attila@lendvai.name>
Date: Tue, 26 May 2015 01:50:07 +0200
Subject: [PATCH] make the build script more roboust.

---
 .gitignore       |  1 -
 build.sh         | 10 +++++++++-
 build/.gitignore |  4 ++++
 3 files changed, 13 insertions(+), 2 deletions(-)
 create mode 100644 build/.gitignore

diff --git a/.gitignore b/.gitignore
index 3c49f0f..99ed0d4 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1 @@
-build/
 notes.txt
diff --git a/build.sh b/build.sh
index d7d486a..158b548 100755
--- a/build.sh
+++ b/build.sh
@@ -1,11 +1,13 @@
 #!/bin/bash
 
+set -e
+
 absolutize ()
 {
   if [ ! -d "$1" ]; then
     echo
     echo "ERROR: '$1' doesn't exist or not a directory!"
-    exit -1
+    kill -INT $$
   fi
 
   pushd "$1" >/dev/null
@@ -14,6 +16,12 @@ absolutize ()
 }
 
 TARGET_PLATFORM=$1
+
+if [ -z ${TARGET_PLATFORM} ]; then
+    echo "Usage: $0 target-platform (e.g. 'TLWDR4300')"
+    kill -INT $$
+fi
+
 BUILD=`dirname "$0"`"/build/"
 BUILD=`absolutize $BUILD`
 IMGTEMPDIR="${BUILD}/openwrt-build-image-extras"
diff --git a/build/.gitignore b/build/.gitignore
new file mode 100644
index 0000000..5e7d273
--- /dev/null
+++ b/build/.gitignore
@@ -0,0 +1,4 @@
+# Ignore everything in this directory
+*
+# Except this file
+!.gitignore