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[tor-talk] Upgrading an obfsbridge to the latest alpha on git master, on raspberry pi

A few days ago, George posted an invitation for obfsproxy operators to
upgrade their Tor software to the latest version on the master branch in
the Tor git repo. [1]

I'm running a low traffic obfsbridge on a raspberry pi, the whole thing is
rather experimental in its nature already, so decided to try just that.

Presumably everyone for whom this might be relevant already knows these
things much better than myself, but since they might be applicable to
all/some Debian users (raspberrypi + raspbian/debian users for sure), i'm
outlining a couple of snags that can maybe be avoided. Previously I ran
0.2.4.15-rc compiled from deb-src
(http://deb.torproject.org/torproject.orgexperimental-wheezy main); I
think it'd have been the same if a precompiled
package had been used. I'd still like to be able to manage Tor via init
scripts with as little change as possible, etc.

TL;DR:

   - after make && make install, do a whereis tor; in all likelihood, your
   new version will be at /usr/local/bin/tor, old one at /usr/sbin/tor etc.;
   /etc/init.d/tor will be using /usr/sbin/tor, so need to change the DAEMON
   key there
   - torrc-defaults will have different values in different distro packages.
   cd /usr/local/etc/tor; if there's no torrc there: sudo ln -s
   /etc/tor/torrc (presumably that's where you kept your torrc before;
   ~/.torrc should work in any case)

$ git clone https://git.torproject.org/tor.git && cd tor
$ ./autogen.sh
if it complains about no aclocal (et al.):
$ sudo apt-get install automake && ./autogen.sh
$ ./configure
$ make
$ sudo make install # or, just use it like that (Tor binary is in src/or/)

If you're using service tor {start,stop,reload,etc}:

$ /usr/sbin/tor --version; /usr/local/bin/tor --version
$ grep DAEMON= /etc/init.d/tor

The latter will likely point to /usr/sbin/tor, which might be outdated
(check above).
If that's the case, change that line in init.d/tor to point to the new Tor
executable /usr/local/bin/tor - that's where it *should* be; if you don't
like that, change
BINDIR = /usr/local/bin
in Tor's Makefile and make install again.

The Debian Tor packages seem to like to assume torrc will be placed in
/etc/tor/torrc. If that's where your torrc resides, make a symlink to it
from /usr/local/etc/tor, which is where the new Tor executable will look
for it.

This is probably an insanely ugly way of dealing with these snags, but if
anyone is reserved to upgrade because of things like that, maybe this'll
help someone..

Kostas.

[1]:
https://lists.torproject.org/pipermail/tor-relays/2013-August/002477.html
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