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Re: [Savannah-hackers-public] Setting up bzr+ssh on Savannah.

From: Karl Fogel
Subject: Re: [Savannah-hackers-public] Setting up bzr+ssh on Savannah.
Date: Sun, 16 May 2010 22:55:57 -0400
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/23.1.93 (gnu/linux)

Ping; any help on the questions below appreciated.  Thanks,

Karl Fogel <address@hidden> writes:
>Sylvain Beucler <address@hidden> writes:
>>Also: Karl, you'll want to test the creation of new bzr repositories
>>from the Savane interface in the new environment.
>Sure.  What is this interface?  I've never used it AFAIK.  (Is it a web
>interface, or something else?)
>Current status: I'm testing bzr+ssh:// on vcs-noshell, and some things
>work, but not everything works yet.  Details follow, ending with a
>I've done the following:
>    * Tar'd up /srv/bzr on sftp, copied it over to vcs-noshell, and
>      unpacked it into /srv/bzr there.  (I didn't worry about the small
>      chance that a repository could have inconsistent state when I tar
>      it up, since this is just for testing right now anyway.)
>    * Installed bazaar on vcs-noshell:
>      First I tried
>        # apt-get update
>        # apt-get install bzr
>      But it turns out the latest bzr in lenny is 1.5 and that's what
>      we're running already.  So as a temporary solution, I built bzr
>      2.1.0 from source to run in-place (/root/kfogel/bzr-2.1.0/bzr).
>      In the long run we'll need a better solution, of course.  At
>, the latest is
>      1.16.1, which is a bit behind.  Shall I see if we can get 2.1.0
>      backported?
>      Anyway, to get it to build from source I had to do the following:
>        # apt-get install python-pyrex
>        # apt-get install python-paramiko
>        # apt-get install bzrtools
>        # apt-get install gcc
>        # apt-get install python-dev
>        # apt-get install libc6-dev
>        # apt-get install zlibc
>        # apt-get install zlib1g-dev
>        # cd ~root/kfogel/bzr-2.1.0/
>        # make   (equivalent to 'python build', I believe)
>    * I added this to /etc/ on vcs-noshell:
>        $use_bzr = 1;
>        $bin_bzr = "/root/kfogel/bzr-2.1.0/bzr";
>    * Also on vcs-noshell, applied a patch to /usr/local/bin/sv_membersh
>      to disable plugins and suppress writing of ~/.bzr.log.  See
>      for that patch.  I also tweaked $regexp_bzr at the top of that
>      file:
>        our $regexp_bzr = '^(bzr|/root/kfogel/bzr-2.1.0/bzr) serve \
>                           --inet --directory=/ --allow-writes$';
>On my client machine, I can do this:
>  $ BZR_REMOTE_PATH=/root/kfogel/bzr-2.1.0/bzr \
>    bzr ls bzr+ssh://address@hidden/srv/bzr/emacs/trunk
>to get a listing of the Emacs bzr branches.  Note the hostname is "git"
>for now, because doesn't point to vcs-noshell yet.
>However, I cannot do the same command with user "kfogel":
>  $ BZR_REMOTE_PATH=/root/kfogel/bzr-2.1.0/bzr \
>    bzr ls bzr+ssh://address@hidden/srv/bzr/emacs/trunk
>nor with "kfogel" and the proper path:
>  $ BZR_REMOTE_PATH=/root/kfogel/bzr-2.1.0/bzr \
>    bzr ls bzr+ssh://address@hidden/emacs/trunk
>...because both get this error:
>  Failed to exec '/root/kfogel/bzr-2.1.0/bzr --no-plugins serve  \
>    --inet --directory=/srv/bzr --allow-writes':                 \
>  Permission denied at /usr/local/bin/sv_membersh line 157.
>  bzr: ERROR: Connection closed: Unexpected end of message.      \
>  Please check connectivity and permissions, and report a bug if \
>  problems persist.
>And that's what I'm debugging right now.  Some notes:
>In the first case (the successful one using "root"), we presumably never
>even invoke /usr/local/bin/sv_membersh on the server, because "root" is
>not affected by the restricted shell system.  Hence the need for
>"/srv/bzr" in the original URL, since the "--directory=/srv/bzr" option
>that /usr/local/bin/sv_membersh adds to 'bzr serve' never happens.
>Does that sound correct?
>In the second case, with user "kfogel", I'm not sure why the
>custom-built bzr is failing to exec().  The file
>/etc/ssh/authorized_keys/kfogel exists and has the expected content.
>And I can log into the server and run the exact same 'bzr serve' command
>on the command line (as root) just fine.
>Any ideas?

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