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0.28-from-0.27.1.md

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Notable changes in 0.28 as compared to 0.27.1

May require attention

  • The default install PREFIX is now "/usr/local".

  • BINDIR, DOCDIR, LIBDIR, and MANDIR settings no longer side-step DESTDIR. i.e. make DESTDIR=/x MANDIR=/y install will install the manpages to "/x/y" not just "/y".

  • The index format has changed, which will trigger a full index rebuild on the next index run, making that run more expensive than usual.

  • When given --xdev, bup save should no longer skip directories that are explicitly listed on the command line when the directory is both on a separate filesystem, and a subtree of another path listed on the command line. Previously bup save --xdev / /usr could skip "/usr" if it was on a separate filesystem from "/".

  • Tags along a branch are no longer shown in the branch's directory in the virtual filesystem (VFS). i.e. given bup tag special /foo/latest, "/foo/special" will no longer be visible via bup ls, bup web, bup fuse, etc., but the tag will still be available as "/.tag/special".

General

  • bup now provides experimental rm and gc subcommands, which should allow branches and saves to be deleted, and their storage space reclaimed (assuming nothing else refers to the relevant data). For the moment, these commands require an --unsafe argument and should be treated accordingly. Although if an attempt to join or restore the data you still care about after a gc succeeds, that's a fairly encouraging sign that the commands worked correctly. (The t/compare-trees command in the source tree can be used to help test before/after results.)

    Note that the current gc command is probabilistic, which means it may not remove all of the obsolete data from the repository, but also means that the command should be fairly efficient, even for large repositories.

  • bup may have less impact on the filesystem cache. It now attempts to leave the cache roughly the way it found it when running a save or split.

  • A specific Python can be specified at ./configure time via PYTHON, i.e. PYTHON=/some/python ./configure, and that Python will be embedded in all of the relevant scripts as an explicit "#!/..." line during make install.

  • bup web will now attempt an orderly shutdown when it receives a SIGTERM.

  • bup web will listen on a filesystem socket when given an address like "unix://...".

  • bup no longer limits the number of files in a directory to 100000. The limit is now UINT_MAX.

  • bup fuse now has a --verbose argument, and responds to --debug.

Bugs

  • bup save should not fail when asked to save a subdirectory of a directory that was completely up to date in the index. Previously this could cause a "shalists" assertion failure.

  • The way bup writes the data to disk (the packfiles in particular), should be a bit safer now if there is a coincident power failure or system crash.

  • A problem has been fixed that could cause bup to ignore the current TZ setting when computing the local time.

  • bup should no longer generate broken commits when the timezone offset is not an integer number of hours (e.g. TZ=Australia/Adelaide).

  • bup midx --output should now work when used with --auto or --force.

  • bup import-rsnapshot should exit with a status of 1, not -1.

  • bup should be more likely to get the data to permanent storage safely on OS X, which appears to follow a surprising interpretation of the fsync() specification.

  • bup web should handle non-ASCII paths better. It will no longer treat them as (and try to convert them to) Unicode (which they're not).

  • bup restore should no longer crash when an attempt to remove an xattr returns EACCES.

Build system

  • The tests can now be run in parallel (and possibly much more quickly) via make -j check.

  • The build system now creates and uses cmd/bup-python which refers to the ./configure selected python.

Thanks to (at least)

Aidan Hobson Sayers, Ben Kelly, Ben Wiederhake, Brandon Smith, Brian Minton, David Kettler, Frank Gevaerts, Gabriel Filion, Greg Troxel, James Lott, Karl-Philipp Richter, Luis Sanchez Sanchez, Marcus Schopen, Mark J Hewitt, Markus, Mathieu Schroeter, Michael March, Nimen Nachname, Nix, Patrick Rouleau, Paul Kronenwetter, Rob Browning, Robert Edmonds, Simon Persson, Tadej Janež, Thomas Klausner, Tilo Schwarz, Tim Riemenschneider, Wayne Scott, pspdevel, and stevelr