scripts/training/cachepipe/bashrc

# 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 allows you to cache commands from the command line.
# Usage:

cachecmd_usage() {
	cat <<EOF
Usage: cachecmd ID command [dep1 [dep2 ...]]
where
  ID is the command ID (unique within the directory)
  command is the command to run (remember to quote multiword commands)
  dep1 .. depN are file and environment dependencies
EOF
}

cachecmd() {
	if [ -z "$2" ]; then
		cachecmd_usage
	else
		local tmpfile=.cachepipe.$$.$(date +%s)
		rm -f $tmpfile
		# $@ must be in quotes, or quoted args get split up
		# see VonC's answer at http://stackoverflow.com/questions/255898/how-to-iterate-over-arguments-in-bash-script
		for arg in "$@"; do
			echo $arg >> $tmpfile
		done

		perl -MCachePipe -e "cache_from_file('$tmpfile')"
		rm -f $tmpfile
	fi
}