New script build.sh

New script build.sh, correctly adds the Package Folder Prefix to the build line
README updated to use build.sh
[adafruit/circuitpython-build-tools#6]

Author: jamesbowman

README.md

@@ -60,4 +60,4 @@ Once installed, make sure you are in the virtual environment:
 
 Then run the build:
 
-    circuitpython-build-bundles --filename_prefix circuitpython-community-bundle --library_location libraries --library_depth 2
+    ./build.sh

build.sh

@@ -0,0 +1,35 @@
+#! /bin/bash
+
+# The MIT License (MIT)
+#
+# Copyright (c) 2016 Scott Shawcroft for Adafruit Industries
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+# THE SOFTWARE.
+
+# This script builds the bundle
+
+set -e
+
+P=$(
+ls -RUx |
+gawk -F '\n' '{ match($1, /(drivers|helpers)\/(.+)\/(.+)\:/, arr) ; if (length(arr[0]) > 0 && match(arr[3], arr[2]) > 0) printf "%s, ", arr[3] }' |
+gawk '{ trimmed = substr($0, 1, length($0) - 2) ; print "\"" trimmed "\"" }'
+)
+
+circuitpython-build-bundles --filename_prefix circuitpython-community-bundle --library_location libraries --library_depth 2 --package_folder_prefix "$P"