preliminary debian package support

This sets i2p up as a functional Debian source package. dpkg-buildpackage
will build i2p using ant preppkg (tarball takes too long and not
helpful). It creates a binary .deb archive of the i2p installation,
which when installed goes into /var/lib/i2p as the non-root user i2p,
and adds an /etc/init.d script to start it up.

Some problems not yet solved:
1) under Debian the conf should go into /etc/i2p, but since it doesn't
   things like the eepsite index file get overwritten if you reinstall.
   should check for those somehow and not replace them, or ask the user.
2) under Debian they like it if you split the generated data from the
   static code, so i2p should go into /usr/lib/i2p maybe, but its
   netDB and any other cache files into /var/cache/i2p
   that's important not just for organization, but also /var is often
   on a filesystem optimized for churn. For now just put it in /var/lib
3) i2p is supposedly architecture independant, but it does choose a
   native jbigi library on postinstall, so does that really count
   as architecture independant?

debian/changelog

+i2p (0.7-0) testing; urgency=low
+  * just setting this debian thing up
+    um...
+ -- dream <nobody@nowhere.invalid>  Wed, 01 Jan 2009 17:14:57 +0000

debian/control

+Source: i2p
+Maintainer: jrandom
+Section: net
+Priority: optional
+Homepage: http://dev.i2p2.de
+Build-Depends: java-sdk, ant
+Recommends: libgmp3c2
+Version: 0.7-0
+Tags: implemented-in::java, interface::daemon, network::client, network::server, role::program, security::cryptography
+
+Package: i2p
+Architecture: all
+Section: net
+Priority: optional
+Depends: java-runtime
+Recommends: libgmp3c2
+Description: load-balanced unspoofable packet switching network
+ I2P is an anonymizing network, offering a simple layer that identity-sensitive
+ applications can use to securely communicate. All data is wrapped with several
+ layers of encryption, and the network is both distributed and dynamic, with no
+ trusted parties.
+Homepage: http://www.i2p2.de
+Version: 0.7-0
+Tags: implemented-in::java, interface::daemon, network::client, network::server, role::program, security::cryptography

debian/copyright

+everything is released according to the 
+terms of the I2P license policy.  For the I2P SDK, 
+that means everything contained within this
+module is released into the public domain unless
+otherwise marked.  Alternate licenses that may be
+used include BSD (used by thecrypto's DSA, ElGamal,
+and SHA256 implementations), Cryptix (used by cryptix's
+AES implementation), and MIT.

debian/rules

+#!/usr/bin/make -f
+
+build:
+	ant preppkg && \
+	(cd pkg-temp; chmod +x postinstall.sh) && \
+	mkdir -p debian/tmp/var/lib && \
+	mkdir -p debian/tmp/etc/init.d && \
+	cp -a debian/scripts/init debian/tmp/etc/init.d/i2p && \
+	cp -a pkg-temp debian/tmp/var/lib/i2p && \
+	touch debian/build
+binary: build
+	mkdir -p debian/tmp/DEBIAN && \
+	dpkg-gencontrol && \
+	cp -a debian/scripts/postinst debian/scripts/postrm debian/scripts/prerm debian/tmp/DEBIAN && \
+	dpkg-deb -b debian/tmp ..
+clean:
+	rm -f debian/build
+	ant clean
+	rm -Rf pkg-temp
+	@exit 0

debian/scripts/init

+#! /bin/sh
+
+### BEGIN INIT INFO
+# Provides:		i2p
+# Required-Start:	$remote_fs $syslog
+# Required-Stop:	$remote_fs $syslog
+# Default-Start:	
+# Default-Stop:		1 2 3 4 5
+# Short-Description:	I2P anonymizing mixnet
+### END INIT INFO
+
+set -e
+
+. /lib/lsb/init-functions
+
+function I2P {
+	su i2p -c "/var/lib/i2p/i2prouter $1"
+}
+
+case "$1" in
+  start)
+	log_daemon_msg "Starting I2P" "i2p"
+	if I2P start; then
+	    log_end_msg 0
+	else
+	    log_end_msg 1
+	fi
+	;;
+  stop)
+	log_daemon_msg "Stopping I2P" "i2p"
+	if I2P stop; then
+	    log_end_msg 0
+	else
+	    log_end_msg 1
+	fi
+	;;
+  restart)
+	log_daemon_msg "Restarting I2P" "i2p"
+	if I2P restart; then
+	    log_end_msg 0
+	else
+	    log_end_msg 1
+	fi
+	;;
+  status)
+	I2P status
+	;;
+
+  *)
+	log_action_msg "Usage: /etc/init.d/i2p {start|stop|restart|status}"
+	exit 1
+esac
+
+exit 0

debian/scripts/postinst

+#!/bin/sh
+TOP=/var/lib/i2p
+useradd -b $TOP -r i2p 2>/dev/null
+chown i2p $TOP -R
+
+update-rc.d
+
+cd $TOP
+exec su i2p -c ./postinstall.sh

debian/scripts/postrm

+#!/bin/sh
+exec userdel i2p

debian/scripts/prerm

+#!/bin/sh
+exec /etc/init.d/i2p stop