#!/bin/bash --

EXECDIRS="bin usr/bin usr/games"

set -e
. /usr/share/javahelper/jh_lib.sh

syntax()
{
   echo -e "Usage: jh_build [options] [<jar> <src>]"
   echo -e "Options:"
   echo -e "\t-h --help: show this text"
   echo -e "\t-V --version: show the version"
   echo -e "\t-q --quiet: don't print the build commands as they are executed"
   echo -e "\t-m<class> --main=<class>: Use this class as the main class"
   echo -e "\t-j<java-home> --java-home=<java-home>: Set the JAVA_HOME variable"
   echo -e "\t-o<javac-opts> --javacopts=<javac-opts>: Options to the Java compiler"
   echo -e "\t--clean: clean the build tree"
   echo -e "\t-N --no-javadoc: Disable building javadoc"
   echo -e "\t-J --javadoc: Enable building javadoc"
   echo -e "\t--javadoc-opts=<javadoc-opts>: Options to javadoc"
   echo -e "Environment Variables:"
   echo -e "\tJAVA_HOME: path to the JDK to use"
   echo -e "\tCLASSPATH: classpath to compile with and set in the manifest"
   echo -e "\tJH_JAR_EXTRA: extra files to be included in the jar"
   exit 1
}

ARGS="q quiet m main j java-home o javacopts J javadoc N no-javadoc O javadoc-opts clean" parseargs "$@"

if [ -n "`getarg clean`" ]; then
   rm -rf debian/_jh_manifest* debian/_jh_build*
	if [ -f debian/javabuild ]; then
		rm -f `awk '{print $1}' < debian/javabuild`
	fi
   exit 0
fi

if [ -n "`getarg j java-home`" ]; then
   JAVA_HOME="`getarg j java-home`"
elif [ -z "$JAVA_HOME" ]; then
   if [ -d /usr/lib/jvm/default-java ]; then
      JAVA_HOME=/usr/lib/jvm/default-java
   elif [ -d /usr/lib/jvm/java-gcj ]; then
      JAVA_HOME=/usr/lib/jvm/java-gcj
   else
		JAVA_HOME=invalid
   fi
fi

JH_JAVAC_OPTS="`getarg o javacopts`"
JH_JAVADOC_OPTS="`getarg O javadoc-opts`"

if ! grep -- -source <<< "$JH_JAVAC_OPTS" &>/dev/null; then
    if ! grep -- -target <<< "$JH_JAVAC_OPTS" &>/dev/null; then
	JH_JAVAC_OPTS="-source 1.5 -target 1.5 $JH_JAVAC_OPTS"
    else
	JH_JAVAC_OPTS="-source 1.5 $JH_JAVAC_OPTS"
    fi
fi

if ! grep -- -source <<< "$JH_JAVADOC_OPTS" &>/dev/null; then
	JH_JAVADOC_OPTS="-source 1.5 $JH_JAVADOC_OPTS"
fi

function dobuild()
{

	jarfile="$1"
	shift
	ext="`basename "$jarfile" .jar`"
	srcdirs=
	srcfiles=
	while [ -n "$1" ]; do 
		if [ -f "$1" ]; then
			srcfiles="$srcfiles $1"
		elif [ -d "$1" ]; then
			srcdirs="$srcdirs $1"
		else
			echo "Ignoring $1 because it does not exist"
		fi
		shift
	done

	if [ "$JAVA_HOME" == "invalid" ]; then
      echo "Cannot find any JAVA_HOME: aborting" 1>&2
      exit 1
	fi

	rm -f debian/_jh_manifest.$ext
	(
            if [ -n "$CLASSPATH" ]; then
		echo -n "Class-Path: "
		echo $CLASSPATH | sed 's/:/ /g'
	    fi
	    if [ -n "`getarg m main`" ]; then
		echo "Main-Class: `getarg m main`"
		echo "Debian-Java-Home: $JAVA_HOME"
	    fi
        ) | perl -p -e 's/(.{72})(?=.)/$1\n /go' >> debian/_jh_manifest.$ext
        # (NB: see D::JH::Java::write_manifest_section_fd on the regex above)

   CLASSPATHDOCS="`for i in $(grep-dctrl --no-field-names --show-field Build-Depends,Build-Depends-Indep -F source "$pkg" debian/control | tr , ' ' | sed 's/([^)]*)//g') ; do dpkg -L $i 2>/dev/null | grep /usr/share/doc/.*/api$; done | sed 's/^/-link /' | xargs`"

	mkdir -p debian/_jh_build.$ext
	if [ -n "$srcdirs" ]; then

		if [ -z "`getarg q quiet`" ]; then
			echo find $srcdirs -name '*.java' -and -type f -print0 '|' xargs -0 $JAVAC -cp $CLASSPATH:debian/_jh_build.$ext -d debian/_jh_build.$ext $JH_JAVAC_OPTS $srcfiles
		fi

		find $srcdirs -name '*.java' -and -type f -print0 | xargs -0 $JAVAC -cp $CLASSPATH:debian/_jh_build.$ext -d debian/_jh_build.$ext $JH_JAVAC_OPTS $srcfiles

		if [ -n "`getarg J javadoc`" ] || [ -z "`getarg N no-javadoc`" ]; then
			if [ -z "`getarg q quiet`" ]; then
				echo find $srcdirs -name '*.java' -and -type f -print0 '|' xargs -0 $JAVADOC $CLASSPATHDOCS -classpath $CLASSPATH:debian/_jh_build.$ext -d debian/_jh_build.javadoc/api -quiet $JH_JAVADOC_OPTS $srcfiles
			fi

			find $srcdirs -name '*.java' -and -type f -print0 | xargs -0 $JAVADOC $CLASSPATHDOCS -classpath $CLASSPATH:debian/_jh_build.$ext -d debian/_jh_build.javadoc/api -quiet $JH_JAVADOC_OPTS $srcfiles
		fi

	elif [ -n "$srcfiles" ]; then

		if [ -z "`getarg q quiet`" ]; then
			echo $JAVAC -cp $CLASSPATH:debian/_jh_build.$ext -d debian/_jh_build.$ext $JH_JAVAC_OPTS $srcfiles
		fi

		$JAVAC -cp $CLASSPATH:debian/_jh_build.$ext -d debian/_jh_build.$ext $JH_JAVAC_OPTS $srcfiles

		if [ -n "`getarg J javadoc`" ] || [ -z "`getarg N no-javadoc`" ]; then
			if [ -z "`getarg q quiet`" ]; then
				echo $JAVADOC $CLASSPATHDOCS -classpath $CLASSPATH:debian/_jh_build.$ext -d debian/_jh_build.javadoc/api -quiet $JH_JAVADOC_OPTS $srcfiles
			fi
			$JAVADOC $CLASSPATHDOCS -classpath $CLASSPATH:debian/_jh_build.$ext -d debian/_jh_build.javadoc/api -quiet $JH_JAVADOC_OPTS $srcfiles
		fi

	else
		exit 0
	fi

	touch "$jarfile"
	jarpath="`readlink -f "$jarfile"`"

	(
		cd debian/_jh_build.$ext;
		if [ -z "`getarg q quiet`" ]; then
			echo $JAR cfm "$jarpath" ../_jh_manifest.$ext *
		fi
		$JAR cfm  "$jarpath" ../_jh_manifest.$ext *
	)
	if [ -n "$JH_JAR_EXTRA" ]; then
		if [ -z "`getarg q quiet`" ]; then
			echo $JAR uf "$jarpath" $JH_JAR_EXTRA
		fi
		$JAR uf "$jarpath" $JH_JAR_EXTRA
	fi

}

JAVAC="${JAVA_HOME}/bin/javac"
JAVADOC="${JAVA_HOME}/bin/javadoc"
JAR="${JAVA_HOME}/bin/jar"

jarfile="${ARGV[0]}"

if [ -z "$jarfile" ]; then
	if [ -f debian/javabuild ]; then
		cat debian/javabuild | while read line; do
			dobuild $line
		done
	fi
else
	dobuild "${ARGV[@]}"
fi


