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We were not following the git behavior for leading slashes
in path names when matching git ignores and git attribute
file patterns. This should fix issue #638.
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Memory pools and khash hashtables
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This renamed `git_khash_str` to `git_strmap`, `git_hash_oid` to
`git_oidmap`, and deletes `git_hashtable` from the tree, plus
adds unit tests for `git_strmap`.
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This updates khash.h with some extra features (like error checking
on allocations, ability to use wrapped malloc, foreach calls, etc),
creates two high-level wrappers around khash: `git_khash_str` and
`git_khash_oid` for string-to-void-ptr and oid-to-void-ptr tables,
then converts all of the old usage of `git_hashtable` over to use
these new hashtables.
For `git_khash_str`, I've tried to create a set of macros that
yield an API not too unlike the old `git_hashtable` API. Since
the oid hashtable is only used in one file, I haven't bother to
set up all those macros and just use the khash APIs directly for
now.
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Adding a small stash of nodes with key conflicts has been
demonstrated to greatly increase the efficiency of a cuckoo
hashtable. See:
http://research.microsoft.com/pubs/73856/stash-full.9-30.pdf
for more details.
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This removes the custom paged allocator from revwalk and
replaces it with a `git_pool`.
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This converts the git attr related code (including ignores) and
the git diff related code (and implicitly the status code) to use
`git_pools` for storing strings. This reduces the number of small
blocks allocated dramatically.
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This adds a `git_pool` object that can do simple paged memory
allocation with free for the entire pool at once. Using this,
you can replace many small allocations with large blocks that
can then cheaply be doled out in small pieces. This is best
used when you plan to free the small blocks all at once - for
example, if they represent the parsed state from a file or data
stream that are either all kept or all discarded.
There are two real patterns of usage for `git_pools`: either
for "string" allocation, where the item size is a single byte
and you end up just packing the allocations in together, or for
"fixed size" allocation where you are allocating a large object
(e.g. a `git_oid`) and you generally just allocation single
objects that can be tightly packed. Of course, you can use it
for other things, but those two cases are the easiest.
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More Networking updates
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This allows the caller to update an internal structure or update the
user output with the tips that were updated.
While in the area, only try to update the ref if the value is
different from its old one.
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In the case that walk->one is NULL, we know that we have no positive
references, so we already know that the revwalk is over.
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Trying to send every single line immediately won't give us any speed
improvement and duplicates the code we need for other transports. Make
the git transport use the same buffer functions as HTTP.
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This changes the git_remote_download() API, but the existing one is
silly, so you don't get to complain.
The new API allows to know how much data has been downloaded, how many
objects we expect in total and how many we've processed.
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This limitation was a misparsing of the documentation.
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Code clean up, including fixing warnings on Windows 64-bit build
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This fixes all the warnings on win64 except those in deps, which
come from the regex code.
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Adds a new public reference function `git_reference_lookup_oid`
that directly resolved a reference name to an OID without returning
the intermediate `git_reference` object (hence, no free needed).
Internally, this adds a `git_reference_lookup_resolved` function
that combines looking up and resolving a reference. This allows
us to be more efficient with memory reallocation.
The existing `git_reference_lookup` and `git_reference_resolve`
are reimplmented on top of the new utility and a few places in the
code are changed to use one of the two new functions.
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This removes the code for the old status implementation.
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Fix git_repository_set_odb() refcount issue
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git_repository_free() calls git_odb_free() if the owned odb is not null.
According to the doc, when setting a new odb through git_repository_set_odb() the caller has to take care of releasing the odb by himself.
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The code used to assume that there had to be data after the newline in
a tree cache extension entry. This isn't true for a childless
invalidated entry if it's the last one, as there won't be any children
nor a hash to take up space.
Adapt the off-by-one comparison to also work in this case. Fixes #633.
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Resolve any lingering deltas, write out the index file and rename the
packfile.
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This will allow us to index a packfile as soon as we receive it from
the network as well as storing it with its final name so we don't need
to pass temporary file names around.
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The new indexer needs to be able to bypass any kind of buffering, as
it's trying to map data that it has just written to disk.
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Index refcount issue
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git_repository_free() calls git_index_free() if the owned index is not null.
According to the doc, when setting a new index through git_repository_set_index() the caller has still to take care of releasing the index by itself.
In order to cope with this, this fix makes sure the index refcount is incremented when a new repository is being plugged a new index.
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Variable values may be quoted to include newlines, literal quotes and
other characters. Add support for these and test it.
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This adds preliminary support for pathspecs to diff and status.
The implementation is not very optimized (it still looks at
every single file and evaluated the the pathspec match against
them), but it works.
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new-error-handling
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As parents are older than their children, we're appending to the
commit list most of the time, which makes an ordered linked list quite
inefficient.
While we're there, don't sort the results list in the main loop, as
we're sorting them afterwards and it creates extra work.
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There is no need walk down the parents of a merge base to mark them as
uninteresting because we'll never see them. Calculate the merge bases
in prepare_walk() so mark_uninteresting() can stop at a merge base
instead of walking all the way to the root.
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It's implemented in revwalk.c so it has access to the revision
walker's commit cache and related functions. The algorithm is the one
used by git, modified so it fits better with the library's functions.
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The code was already there, so factor it out and let users push an OID
by giving it a reference name. Only refs to commits are
supported. Annotated tags will throw an error.
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Update git_repository_open
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Add a new command `git_repository_open_ext` with extended options
that control how searching for a repository will be done. The
existing `git_repository_open` and `git_repository_discover` are
reimplemented on top of it. We may want to change the default
behavior of `git_repository_open` but this commit does not do that.
Improve support for "gitdir" files where the work dir is separate
from the repo and support for the "separate-git-dir" config. Also,
add support for opening repos created with `git-new-workdir` script
(although I have only confirmed that they can be opened, not that
all functions work correctly).
There are also a few minor changes that came up:
- Fix `git_path_prettify` to allow in-place prettifying.
- Fix `git_path_root` to support backslashes on Win32. This fix
should help many repo open/discover scenarios - it is the one
function called when opening before prettifying the path.
- Tweak `git_config_get_string` to set the "out" pointer to NULL
if the config value is not found. Allows some other cleanup.
- Fix a couple places that should have been calling
`git_repository_config__weakptr` and were not.
- Fix `cl_git_sandbox_init` clar helper to support bare repos.
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The cleanup needs to happen anyway, so set the error code and jump
there instead of copying the code.
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