path: root/trunk/infrastructure/bin/compilecache.sh

#!/bin/bash

#  Copyright 2009 Google 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.

CP_CMD="cp -R -u"
if [ `uname` == "Darwin" ]; then
    CP_CMD="/bin/cp -R -n"
fi

function cacheonfiles {
    NAME=$1; FILES=$2; FUNC=$3; NOCOPY=1;
    if [ -z "$4" ]; then
	NOCOPY=0
    fi
    REBUILD=0
    BPATH=buildcache/$NAME
    FILETEST=$BPATH/t
    if [ ! -f $FILETEST ]; then
	REBUILD=1
    else
	for a in $FILES; do
	    if [ $FILETEST -ot $a ]; then
		echo $a has changed, rebuilding $NAME
		REBUILD=1
	    fi
	done
    fi
    if [ $REBUILD -eq 1 ]; then
	if [ -d $BPATH ]; then
	    rm -rf $BPATH
	fi
	mkdir -p $BPATH
	$FUNC $BPATH
	pushd $BPATH >> /dev/null
	touch t
	popd >> /dev/null
    else 
	echo using cached $NAME...
    fi
    if [ $NOCOPY -ne 1 ]; then
	for a in $BPATH/*; do
	    if [ -d $a ]; then
		$CP_CMD $a build/
	    elif [ -f $a ]; then
		cp $a build/
	    else
		echo unknown file type $a
		exit 1
	    fi
	done
    fi
}