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#!/bin/bash
# Copyright (c) Stephen C. Gilardi. All rights reserved. The use and
# distribution terms for this software are covered by the Eclipse Public
# License 1.0 (http://opensource.org/licenses/eclipse-1.0.php) which can be
# found in the file epl-v10.html at the root of this distribution. By
# using this software in any fashion, you are agreeing to be bound by the
# terms of this license. You must not remove this notice, or any other,
# from this software.
#
# clj-env-dir Launches Clojure, passing along command line arguments. This
# launcher is configured using environment variables and sets
# up CLASSPATH based on the contents of a specified directory.
#
# scgilardi (gmail)
# Created 7 January 2009
#
# Environment variables:
#
# Required:
#
# CLOJURE_EXT The path to a directory containing (either directly or as
# symbolic links) jar files and/or directories whose paths
# should be in Clojure's classpath. The value of the
# CLASSPATH environment variable for Clojure will be a list
# of these paths followed by the previous value of CLASSPATH
# (if any).
#
# Optional:
#
# CLOJURE_JAVA The command to launch a JVM instance for Clojure
# default: java
# example: /usr/local/bin/java6
#
# CLOJURE_OPTS Java options for this JVM instance
# default:
# example:"-Xms32M -Xmx128M -server"
#
# CLOJURE_MAIN The Java class to launch
# default: clojure.main
# example: clojure.contrib.repl_ln
set -o errexit
set -o nounset
#set -o xtrace
function die { echo "$1" 1>&2; exit 1; }
[ -d "${CLOJURE_EXT:-}" ] || die \
"CLOJURE_EXT=\"${CLOJURE_EXT:-}\": directory not found"
EXT="$(find ${CLOJURE_EXT} -mindepth 1 -maxdepth 1 -print0 | tr \\0 \:)"
CLASSPATH="${EXT%:}${CLASSPATH:+:${CLASSPATH}}"
export CLASSPATH
JAVA=${CLOJURE_JAVA:-java}
OPTS=${CLOJURE_OPTS:-}
MAIN=${CLOJURE_MAIN:-clojure.main}
exec $JAVA $OPTS $MAIN "$@"
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