diskimage-builder/elements/cache-url/bin/cache-url
Vipul Sabhaya c0206aa52c Fix cache-url to use single '=' in test expression
When downloading the base image for the first time, the response
test expression fails with '[: 200: unexpected operator'.  This is
caused by using '==' in the test expression, which is not supported
in sh scripts.

Fixes bug 1195030

Change-Id: I66260814cb591371dc5c10f8436f90c2f18d78cf
2013-06-26 14:51:30 -07:00

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#!/bin/sh
# Copyright 2012 Hewlett-Packard Development Company, L.P.
# All Rights Reserved.
# Copyright 2013 Red Hat, Inc.
#
# Licensed 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.
set -e
# Download a URL to a local cache
# e.g. cache-url http://.../foo ~/.cache/image-create/foo
url=$1
dest=$2
mkdir -p $(dirname $dest)
tmp=$(mktemp $(dirname $dest)/.download.XXXXXXXX)
if [ -f $dest ] ; then
time_cond="-z $dest"
success="Server copy has changed. Using server version of $url"
else
success="Downloaded and cached $url for the first time"
fi
rcode=$(curl -o $tmp -w '%{http_code}' $url $time_cond)
if [ "$rcode" = "200" ] ; then
echo $success
mv $tmp $dest
elif [ "$rcode" = "304" ] ; then
echo "Server copy has not changed. Using locally cached $url"
rm -f $tmp
else
echo "Server returned an unexpected response code. [$rcode]"
rm -f $tmp
exit 1
fi