#!/bin/bash
# (C) Richard Whitty 2008
# A few bash functions which will probably come in useful to java programmers.
CLASSPATH=lib:lib/jogl.jar:lib/gluegenrt.jar:.
BINDIR=bin
# finds files with the extention provided.
# $1 the extenstion to look for
# if we are to be verbose
function find_by_extenstion {
	find  -name \*.$1
}
# gets a list of all class files
function get_class {
	find_by_extenstion class
}
# gets a list of all class files
function get_src {
	find_by_extenstion java
}
# removes class files
function clean {
	get_class | while read
	do
		rm $OPTIONS "$REPLY"
	done
}
# checks if a source file is due for a rebuild.
function needs_rebuild {
	local srcfile="$1"
	local binfile="${BINDIR}/${srcfile:0:${#srcfile}-4}class"
	
	if [[ "$srcfile" -nt "$binfile" ]]
	then
		return 1
	else
		return 0
	fi
}
function get_sources_to_be_updated {
	get_src|while read srcfile
	do
		needs_rebuild "$srcfile"
		if (( $? == 1 ))
		then
			echo $srcfile
		fi
	done
}

# only does the ones that have been updated
function rebuild {
	get_sources_to_be_updated | while read
	do
		echo "javac -cp \"$CLASSPATH\" -d $BINDIR \"$REPLY\""
		javac -cp $CLASSPATH -d $BINDIR "$REPLY" || break;
	done
}
# builds the sources starting from the current directory.
function build {
clean
rebuild
}
function tbuild {
	time build
}
# prints a handy word/line/char count for the source files.
function wordcount {
	if [[ $VERBOSE == 0 ]]
	then
		find -name \*.java -print0 |wc -l --files0-from=-
	else
		find -name \*.java -print0 |wc --files0-from=-
	fi
}
VERBOSE=0
for arg in $@
do
	if [[ "$arg" ==  "-v" ]]
	then
		OPTIONS=" -v "
		VERBOSE="1"
	else
		$arg
	fi
done