1 files changed, 59 insertions, 0 deletions
diff --git a/build/cache.sh b/build/cache.sh
new file mode 100644
index 00000000..b8cd8ecc
--- /dev/null
+++ b/build/cache.sh
@@ -0,0 +1,59 @@
+#!/bin/sh
+##############################################################################
+# Copyright (c) 2016 Red Hat Inc.
+# Dan Radez <dradez@redhat.com>
+# All rights reserved. This program and the accompanying materials
+# are made available under the terms of the Apache License, Version 2.0
+# which accompanies this distribution, and is available at
+# http://www.apache.org/licenses/LICENSE-2.0
+##############################################################################
+
+CACHE_DIR="$(pwd)/cache"
+
+# Make sure the cache dir exists
+function cache_dir {
+    if [ ! -d $CACHE_DIR/ ]; then mkdir $CACHE_DIR/; fi
+    if [ ! -f $CACHE_DIR/.cache ]; then touch $CACHE_DIR/.cache; fi
+    echo "Cache Dir: $CACHE_DIR"
+}
+
+function cache_git_tar {
+    echo "cache_git_tar git ls-remote"
+}
+
+# $1 = download url
+# $2 = filename to write to
+function curl_file {
+    echo "Downloading $1"
+    echo "Cache location: $CACHE_DIR/$2"
+    curl -L $1 > $CACHE_DIR/$2
+    sed -i "/$2/d" $CACHE_DIR/.cache
+    echo "$(md5sum $CACHE_DIR/$2) $2" >> $CACHE_DIR/.cache
+}
+
+# $1 =  download url
+function populate_cache {
+    cache_dir
+
+    # get the file name
+    filename="${1##*/}"
+
+    # check if the cache file exists
+    # and if it has an md5 compare that
+    echo "Checking cache file: $1"
+    if [ ! -f $CACHE_DIR/${filename} ]; then
+        curl_file $1 $filename
+    else
+        remote_md5="$(curl -L ${1}.md5 | awk {'print $1'})"
+        if [ -z "$remote_md5" ]; then
+            echo "Got empty MD5 from remote for $filename, skipping MD5 check"
+        elif [ "$remote_md5" != "$(grep ${filename} $CACHE_DIR/.cache | awk {'print $1'})" ]; then
+            curl_file $1 $filename
+        fi
+    fi
+}
+
+# $1 = filename to get from cache
+function get_cached_file {
+  cp -f $CACHE_DIR/$1 .
+}