Mini Shell

#!/bin/bash
#
# Small script to build a classpath depending on the JVM used
#
# JPackage Project <http://www.jpackage.org/>
#

# Import java functions
[ -r "/usr/share/java-utils/java-functions" ] \
 &&  . "/usr/share/java-utils/java-functions" || exit 1

# Prints help message
usage() {
cat >&2 << EOF_USAGE
Usage: $0 <jar1> [<jar2> .. <jarn>]
jarX: name of a jar
      Example: jndi
EOF_USAGE
exit 2
}

[ "$#" -eq "0" ] && usage

set_javacmd || exit 3

check_java_env || exit 4

set_jvm_dirs || exit 5

_ALLFOUND="true"

for extension in "$@" ; do
    unset _JARS
    extension=$(find_jar $extension)
    if [ "$?" = 0 ] ; then
	if [ -d "$extension" ] ; then
	    # Brute-force approach. If we can't specify a single jar, we can as
	    # well take everything in the directory
	    # This may create duplicates if symlinks point back inside the
	    # directory structure, but who cares
	    _JARS=$(find "$extension" -follow -name "*.jar" -type f -printf %p: 2>/dev/null)
	else
	    _JARS=$extension:
	fi
	_CLASSPATH=$_CLASSPATH$_JARS
    else
	# Defer failure to get list of all errors in one shot
	_ALLFOUND="false"
    fi
done

# Cleanup trailing :
_CLASSPATH="$(echo $_CLASSPATH | sed 's+:$++g')"

# Echo classpath whether it's complete or not
# Apps that do not care about a full classpath can redirect errors to /dev/null
echo "$_CLASSPATH"

if [ "$_ALLFOUND" = "true" ] ; then
    exit 0
else
    echo "$0: error: Some specified jars were not found" >&2
    exit 6
fi