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Obnam, a backup program
=======================
Obnam is a backup program. It is currently in BETA quality, meaning that
all the necessary features should be there, but there are bugs that may
annoy you a lot, and performance may be entirely inadequate for you.
Hopefully using Obnam will no longer turn you bitter and hateful, and
make you abandon all hope for civilisation, move into the rain forest,
and talk to birds for the rest of your life.
It would be inadvisable to rely on Obnam as your only backup solution,
but it should be ready for evaluation use.
Home page
---------
The Obnam home page is at <http://braawi.org/obnam/>, see there
for more information.
Installation
------------
The source tree contains packaging for Debian. Run `debuild -us -uc` to
build an installation package.
On other systems, using the `setup.py` file should work: run
"python setup.py --help" for advice. If not, please report a bug.
(I've only tested `setup.py` enough for to build the Debian package.)
You need to install my Python B-tree library, and some other libraries
and tools, which you can get from:
* <http://liw.fi/larch/>
* <http://liw.fi/ttystatus/>
* <http://liw.fi/lru/>
* <http://liw.fi/coverage-test-runner/>
* <http://liw.fi/extrautils/>
Use
---
To get a quick help summary of options:
./obnam --help
To make a backup:
./obnam backup --repository /tmp/mybackup $HOME
For more information, see the manual page:
man -l obnam.1
Hacking
-------
The canonical version control repository for obnam itself is at:
http://code.liw.fi/obnam/bzr/
The 'trunk' branch is the main development one. Note that the URL points
at a bzr repository, it is not useful to browse it by hand.
To build:
make
To run automatic tests:
make check
python test-sftpfs # Read it first, though. Requires ssh setup.
You need my CoverageTestRunner to run tests, see above for where to get it.
A couple of scripts exist to run benchmarks and profiles:
./run-benchmark
viewprof obnam.prof cumulative | less -S
viewprof is a little helper script I wrote, around the Python pstats module.
You can use your own, or get mine from extrautils (see above).
If you make any changes, I welcome patches, either as plain diffs, bzr
bundles, or public repositories I can merge from.
The code layout is roughly like this:
obnamlib/ # all the real code
obnamlib/plugins/ # the plugin code (see pluginmgr.py)
obnam # script to invoke obnam
_obnammodule.c # wrapper around some system calls
In obnamlib, every code module has a corresponding test module,
and "make check" uses CoverageTestRunner to run them pairwise. For
each pair, test coverage must be 100% or the test will fail.
Mark statements that should not be included in coverage test with
"# pragma: no cover", if you really, really can't write a test.
without-tests lists modules that have no test modules.
If you want to make a new release of Obnam, I recommend following
my release checklist: <http://braawi.org/obnam/release/>.
Feedback
--------
I welcome bug fixes, enhancements, bug reports, suggestions, requests,
and other feedback. I prefer e-mail (<mailto:liw@liw.fi>).
There's a mailing list for Obnam users: send mail to
<mailto:obnam-help@braawi.org> for instructions.
It would be helpful if you can run `make clean check` before submitting
a patch, but it is not strictly required.
Legal stuff
-----------
Most of the code is written by Lars Wirzenius. (Please provide patches
so that can change.)
The code is covered by the GNU General Public License, version 3 or later.
Copyright 2010, 2011 Lars Wirzenius
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
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