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Under ghc 7.4, this seems to be able to handle all filename encodings
again. Including filename encodings that do not match the LANG setting.
I think this will not work with earlier versions of ghc, it uses some ghc
internals.
Turns out that ghc 7.4 has a special filesystem encoding that it uses when
reading/writing filenames (as FilePaths). This encoding is documented
to allow "arbitrary undecodable bytes to be round-tripped through it".
So, to get FilePaths from eg, git ls-files, set the Handle that is reading
from git to use this encoding. Then things basically just work.
However, I have not found a way to make Text read using this encoding.
Text really does assume unicode. So I had to switch back to using String
when reading/writing data to git. Which is a pity, because it's some
percent slower, but at least it works.
Note that stdout and stderr also have to be set to this encoding, or
printing out filenames that contain undecodable bytes causes a crash.
IMHO this is a misfeature in ghc, that the user can pass you a filename,
which you can readFile, etc, but that default, putStr of filename may
cause a crash!
Git.CheckAttr gave me special trouble, because the filenames I got back
from git, after feeding them in, had further encoding breakage.
Rather than try to deal with that, I just zip up the input filenames
with the attributes. Which must be returned in the same order queried
for this to work.
Also of note is an apparent GHC bug I worked around in Git.CheckAttr. It
used to forkProcess and feed git from the child process. Unfortunatly,
after this forkProcess, accessing the `files` variable from the parent
returns []. Not the value that was passed into the function. This screams
of a bad bug, that's clobbering a variable, but for now I just avoid
forkProcess there to work around it. That forkProcess was itself only added
because of a ghc bug, #624389. I've confirmed that the test case for that
bug doesn't reproduce it with ghc 7.4. So that's ok, except for the new ghc
bug I have not isolated and reported. Why does this simple bit of code
magnet the ghc bugs? :)
Also, the symlink touching code is currently broken, when used on utf-8
filenames in a non-utf-8 locale, or probably on any filename containing
undecodable bytes, and I temporarily commented it out.
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If you have only utf-8 filenames, and need to build git-annex with ghc 7.4,
this will work. But, it will crash on non-utf-8 filenames.
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This fails with ghc 4.7.
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I had not realized what a memory leak the lazy state monad could be,
although I have not seen much evidence of actual leaking in git-annex.
However, if running git-annex on a great many files, this could matter.
The additional Utility.State.changeState adds even more strictness,
avoiding a problem I saw in github-backup where repeatedly modifying
state built up a huge pile of thunks.
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People seem to want to post comments here with vague details about a new
bug, rather than opening a new bug report.
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Dropping a key from a local remote ran git-annex-shell unnecessarily.
Now git-annex-shell is never used when acting on a local remote.
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Done by adding a oneshot mode, in which location log changes are written to
the journal, but not committed. Taking advantage of git-annex's existing
ability to recover in this situation.
This is used by git-annex-shell and other places where changes are made to
a remote's location log.
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This reverts commit 6da40100c99a097401fb130b63edc05b18f61249.
On closer examinaton, this change is wrong. The bup special remote
can be configured with "buprepo=", which makes it use the default
~/.bup repo. This change makes it use a different temp dir each time,
which I'm sure would not be appreciated by anyone with that
configuration.
Bup insisting in creating ~/.bup even when using a different repo
does seem like a bug in *something*, but I'm leaning toward the bug
being in bup itself.
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Not used in git-annex, but I am using it in git-backup
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This drops the >>! and >>? with the nice low fixity. IfElse does have
undocumented >>=>>! and >>=>>? operators, but I deem that too fishy.
Anyway, using whenM and unlessM is easier; I sometimes mixed the operators
up.
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a stricter (but also partial) readMaybe is getting added to base
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So the user can override them.
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Ssh connection caching is now enabled automatically by git-annex. Only one
ssh connection is made to each host per git-annex run, which can speed some
things up a lot, as well as avoiding repeated password prompts. Concurrent
git-annex processes also share ssh connections. Cached ssh connections are
shut down when git-annex exits.
Note: The rsync special remote does not yet participate in the ssh
connection caching.
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Avoids expensive file transfers, at the expense of checking file size
and/or contents.
Required some reworking of the remote code.
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Avoids possible repeated password prompts, at the cost of a small bit of
locking complication.
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For a local git remote, can symlink the file.
For a git remote using rsync, can preseed any local content.
There are a few reasons to use fsck --from on a normal git remote.
One is if it's using gitosis or similar, and you don't have shell access
to run git annex locally. Another reason could be if you just want to
fsck certian files of a bare remote.
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Since the content might be symlinked into place, it's not appropriate to
use withTmp here.
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No need to copy anything, just symlink to the file.
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When a file is present locally, the remote's version can be rsynced to
a copy of it, which will avoid wasting a lot of bandwidth.
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Add news item recommending fscking directory special remotes.
Remote news item about URL backend being removed; it was later added back
to be used by git annex addurl --fast.
Link NEWS into top level.
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Joey Hess
https://www.google.com/accounts/o8/id?id=AItOawk6QAwUsFHpr3Km1yQbg8hf3S7RDYf7hX4
http://joey.kitenet.net/
Lauri Alanko
https://www.google.com/accounts/o8/id?id=AItOawlB7-aXsqwzOi2BIR_Q4sUF8sjj24H6F3c
https://www.google.com/accounts/o8/id?id=AItOawnBJ6Dv1glxzzi4qIzGFNa6F-mfHIvv9Ck