1 files changed, 112 insertions, 0 deletions
diff --git a/build/cache.sh b/build/cache.sh
new file mode 100755
index 000000000..c8cd1b03d
--- /dev/null
+++ b/build/cache.sh
@@ -0,0 +1,112 @@
+#!/bin/bash
+##############################################################################
+# Copyright (c) 2015 Ericsson AB and others.
+# stefan.k.berg@ericsson.com
+# jonas.bjurel@ericsson.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
+##############################################################################
+
+CACHETRANSPORT=${CACHETRANSPORT:-"curl --silent"}
+CACHEBASE=${CACHEBASE:-"file://${HOME}/cache"}
+CACHEMAXAGE=${CACHEMAXAGE:-$[14*24*3600]}
+CACHEDEBUG=${CACHEDEBUG:-1}
+
+debugmsg () {
+    if [ "$CACHEDEBUG" -eq 1 ]; then
+        echo "$@" >&2
+    fi
+}
+
+errormsg () {
+    echo "$@" >&2
+}
+
+# Get a SHA1 based on what's piped into the cache command
+getid() {
+    debugmsg "Generating sha1sum"
+    sha1sum | sed 's/ .*//'
+}
+
+
+# Put in cache
+put() {
+    if check $1; then
+       debugmsg "SHA1 $1 already in cache, skipping storage"
+    else
+        debugmsg "Storing SHA1 $1 in cache"
+        ${CACHETRANSPORT} -T - ${CACHEBASE}/$1.blob
+        echo "Expires: $[`date +"%s"` + $CACHEMAXAGE]" | ${CACHETRANSPORT} -T - ${CACHEBASE}/$1.meta
+    fi
+    exit 0
+}
+
+# Get from cache
+get() {
+    local rc
+
+    ${CACHETRANSPORT} -o - ${CACHEBASE}/$1.blob 2>/dev/null
+    rc=$?
+
+    if [ $rc -eq 0 ]; then
+        echo "Got SHA1 $1 from cache" 2>/dev/null
+    else
+        echo "Tried to get SHA1 $1 from cache but failed" 2>/dev/null
+    fi
+
+    return $?
+}
+
+# Check if in cache
+check() {
+    local rc
+
+    ${CACHETRANSPORT} ${CACHEBASE}/$1.meta &>/dev/null
+    rc=$?
+
+    if [ $rc -eq 0 ]; then
+        debugmsg "Checking for SHA1 $1 in cache and found it, rc = $rc"
+    else
+        debugmsg "Checking for SHA1 $1 in cache and failed, rc = $rc"
+    fi
+
+    return $rc
+}
+
+# Verify that SHA1 seems to be a SHA1...
+validSHA1() {
+    if [ $(echo $1 | wc -c) -ne 41 ]; then
+        return 1
+    else
+        return 0
+    fi
+}
+
+case $1 in
+    getid)
+        if [ $# -ne 1 ]; then
+            errormsg "No arguments can be given to getid!"
+            exit 1
+        fi
+        getid
+        ;;
+    get|check|put)
+        if [ $# -ne 2 ]; then
+            errormsg "Only one argument, the SHA1 sum, can be given to getid!"
+            exit 1
+        else
+            if ! validSHA1 $2; then
+                errormsg "Invalid SHA1 format!"
+                exit 1
+            fi
+        fi
+
+        $1 $2
+        exit $rc
+        ;;
+    *)
+        errormsg "I only know about getid, check, get and put!"
+        exit 1
+esac