Provide helper to detect the current architecture
Signed-off-by: Lee Jones <lee.jones@linaro.org>
diff --git a/bin/detect-arch.sh b/bin/detect-arch.sh
new file mode 100755
index 0000000..60cb779
--- /dev/null
+++ b/bin/detect-arch.sh
@@ -0,0 +1,73 @@
+#!/usr/bin/env bash
+
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements. See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership. The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License. You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied. See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
+# This shell script detects which architecture we're currently
+# operating on, and sets an environment variable the calling
+# script can use.
+
+# stop on error
+set -e
+
+case "${OSTYPE}" in
+ linux*)
+ if [ -x /usr/bin/arch -o -x /bin/arch ]; then
+ export ARCH=`arch`
+ fi
+
+ if [ -x /usr/bin/uname -o -x /bin/uname ]; then
+ export ARCH=`uname -m`
+ fi
+
+ if [ "$ARCH" == "" ]; then
+ echo "$0 uses 'arch' or 'uname' which appear to be missing"
+ exit 1
+ fi
+ ;;
+ *bsd*)
+ # TODO
+ echo "Currently unable to detect Arch on BSD"
+ exit 1
+ ;;
+ darwin*)
+ # TODO
+ echo "Currently unable to detect Arch on macOS (OSX)"
+ exit 1
+ ;;
+ solaris*)
+ # TODO
+ echo "Currently unable to detect Arch on Solaris-like OS"
+ exit 1
+ ;;
+ msys*)
+ # TODO
+ echo "Currently unable to detect Arch on Windows (msys)"
+ exit 1
+ ;;
+ cygwin*)
+ # TODO
+ echo "Currently unable to detect Arch on Windows (cygwin)"
+ exit 1
+ ;;
+ *)
+ echo "Unknown OS detected: ${OSTYPE}"
+ exit 1
+ ;;
+esac
+
+echo "Detected architecture: $ARCH"
