|
8d86cdd4
|
2017-07-07T12:27:43
|
|
ignore: return early to avoid useless indentation
|
|
|
58197758
|
2017-07-07T12:27:18
|
|
ignore: fix indentation of comment block
|
|
e7c24ea2
|
2017-07-20T21:00:15
|
|
tests: fix the rebase-submodule test
|
|
cc9b0b6c
|
2017-06-16T21:05:58
|
|
tests: try to init with empty template path
|
|
|
54d4e5de
|
2017-06-21T14:57:30
|
|
Remove invalid submodule
Fixes #4274
|
|
f908bb8e
|
2017-06-23T10:10:29
|
|
Convert port with htons() in p_getaddrinfo()
`sin_port` should be in network byte order.
|
|
|
e4517af3
|
2017-06-16T23:19:31
|
|
repository: remove trailing whitespace
|
|
|
82bb59b4
|
2017-06-16T21:02:26
|
|
repository: do not initialize templates if dir is an empty string
|
|
|
dd2d5381
|
2018-03-08T18:00:46
|
|
Merge pull request #4572 from pks-t/pks/index-secfixes
Security fixes for reading index v4
|
|
|
182e8e5e
|
2018-03-08T16:19:16
|
|
Bump version to v0.26.2
|
|
|
01b5a161
|
2018-03-08T16:23:15
|
|
CHANGELOG: udpate for v0.26.2
|
|
|
6f4d04b5
|
2018-03-08T12:36:46
|
|
index: error out on unreasonable prefix-compressed path lengths
When computing the complete path length from the encoded
prefix-compressed path, we end up just allocating the complete path
without ever checking what the encoded path length actually is. This can
easily lead to a denial of service by just encoding an unreasonable long
path name inside of the index. Git already enforces a maximum path
length of 4096 bytes. As we also have that enforcement ready in some
places, just make sure that the resulting path is smaller than
GIT_PATH_MAX.
Reported-by: Krishna Ram Prakash R <krp@gtux.in>
Reported-by: Vivek Parikh <viv0411.parikh@gmail.com>
|
|
|
6ddd286e
|
2018-03-08T12:00:27
|
|
index: fix out-of-bounds read with invalid index entry prefix length
The index format in version 4 has prefix-compressed entries, where every
index entry can compress its path by using a path prefix of the previous
entry. Since implmenting support for this index format version in commit
5625d86b9 (index: support index v4, 2016-05-17), though, we do not
correctly verify that the prefix length that we want to reuse is
actually smaller or equal to the amount of characters than the length of
the previous index entry's path. This can lead to a an integer underflow
and subsequently to an out-of-bounds read.
Fix this by verifying that the prefix is actually smaller than the
previous entry's path length.
Reported-by: Krishna Ram Prakash R <krp@gtux.in>
Reported-by: Vivek Parikh <viv0411.parikh@gmail.com>
|
|
|
b6756821
|
2018-03-08T11:49:19
|
|
index: convert `read_entry` to return entry size via an out-param
The function `read_entry` does not conform to our usual coding style of
returning stuff via the out parameter and to use the return value for
reporting errors. Due to most of our code conforming to that pattern, it
has become quite natural for us to actually return `-1` in case there is
any error, which has also slipped in with commit 5625d86b9 (index:
support index v4, 2016-05-17). As the function returns an `size_t` only,
though, the return value is wrapped around, causing the caller of
`read_tree` to continue with an invalid index entry. Ultimately, this
can lead to a double-free.
Improve code and fix the bug by converting the function to return the
index entry size via an out parameter and only using the return value to
indicate errors.
Reported-by: Krishna Ram Prakash R <krp@gtux.in>
Reported-by: Vivek Parikh <viv0411.parikh@gmail.com>
|
|
3f15bf8b
|
2018-03-07T17:46:15
|
|
Merge pull request #4568 from pks-t/pks/zlib-update-0.26
deps: upgrade embedded zlib to version 1.2.11
|
|
|
67211f31
|
2018-03-07T10:42:44
|
|
Bump version to 0.26.1
|
|
|
aade4bd1
|
2018-03-07T16:00:05
|
|
CHANGELOG.md: update for version 0.26.1
|
|
490c7426
|
2018-01-10T15:13:23
|
|
travis: we use bintray's own key for signing
The VM on Travis apparently will still proceed, but it's good practice.
|
|
|
acbb435c
|
2018-01-10T12:33:56
|
|
travis: fetch trusty dependencies from bintray
The trusty dependencies are now hosted on Bintray.
|
|
|
f05f90d8
|
2017-09-15T10:28:32
|
|
cmake: fix linker error with dbghelper library
When the MSVC_CRTDBG option is set by the developer, we will link in the
dbghelper library to enable memory lead detection in MSVC projects. We
are doing so by adding it to the variable `CMAKE_C_STANDARD_LIBRARIES`,
so that it is linked for every library and executable built by CMake.
But this causes our builds to fail with a linker error:
```
LINK: fatal error LNK1104: cannot open file 'advapi32.lib;Dbghelp.lib'
```
The issue here is that we are treating the variable as if it were an
array of libraries by setting it via the following command:
```
SET(CMAKE_C_STANDARD_LIBRARIES "${CMAKE_C_STANDARD_LIBRARIES}"
"Dbghelp.lib")
```
The generated build commands will then simply stringify the variable,
concatenating all the contained libraries with a ";". This causes the
observed linking failure.
To fix the issue, we should just treat the variabable as a simple
string. So instead of adding multiple members, we just add the
"Dbghelp.lib" library to the existing string, separated by a space
character.
|
|
|
edc03027
|
2018-03-07T10:28:21
|
|
deps: upgrade embedded zlib to version 1.2.11
The current version of zlib bundled with libgit2 is version 1.2.8. This
version has several CVEs assigned:
- CVE-2016-9843
- CVE-2016-9841
- CVE-2016-9842
- CVE-2016-9840
Upgrade the bundled version to the current release 1.2.11, which has
these vulnerabilities fixes.
|
|
|
15e11937
|
2017-06-14T13:31:20
|
|
CHANGELOG: document git_filter_init and GIT_FILTER_INIT
|
|
|
8296da5f
|
2017-06-14T10:49:28
|
|
Merge pull request #4267 from mohseenrm/master
adding GIT_FILTER_VERSION to GIT_FILTER_INIT as part of convention
|
|
|
4e257dab
|
2017-06-14T10:48:04
|
|
Merge pull request #4268 from pks-t/pks/homebrew-dupes-deprecation
travis: replace use of deprecated homebrew/dupes tap
|
|
|
953427b3
|
2017-06-14T10:47:55
|
|
Merge pull request #4269 from pks-t/pks/tests
Test improvements
|
|
a78441bc
|
2017-06-13T11:05:40
|
|
Adding git_filter_init for initializing `git_filter` struct + unit test
|
|
|
7f7dabda
|
2017-06-12T13:40:47
|
|
adding GIT_FILTER_VERSION to GIT_FILTER_INIT as part of convention
|
|
|
a180e7d9
|
2017-06-13T11:10:19
|
|
tests: odb: add more low-level backend tests
Introduce a new test suite "odb::backend::simple", which utilizes the
fake backend to exercise the ODB abstraction layer. While such tests
already exist for the case where multiple backends are put together, no
direct testing for functionality with a single backend exist yet.
|
|
|
b2e53f36
|
2017-06-13T11:39:36
|
|
tests: odb: implement `exists_prefix` for the fake backend
The fake backend currently implements all reading functions except for
the `exists_prefix` one. Implement it to enable further testing of the
ODB layer.
|
|
|
983e627d
|
2017-06-13T11:38:59
|
|
tests: odb: use correct OID length
The `search_object` function takes the OID length as one of its
parameters, where its maximum length is `GIT_OID_HEXSZ`. The `exists`
function of the fake backend used `GIT_OID_RAWSZ` though, leading to
only the first half of the OID being used when finding the correct
object.
|
|
|
c4cbb3b1
|
2017-06-13T11:38:14
|
|
tests: odb: have the fake backend detect ambiguous prefixes
In order to be able to test the ODB prefix functions, we need to be able
to detect ambiguous prefixes in case multiple objects with the same
prefix exist in the fake ODB. Extend `search_object` to detect ambiguous
queries and have callers return its error code instead of always
returning `GIT_ENOTFOUND`.
|
|
|
95170294
|
2017-06-13T11:08:28
|
|
tests: core: test initialization of `git_proxy_options`
Initialization of the `git_proxy_options` structure is never tested
anywhere. Include it in our usual initialization test in
"core::structinit::compare".
|
|
|
bee423cc
|
2017-06-13T10:29:23
|
|
tests: network: add missing include for `git_repository_new`
A newly added test uses the `git_repository_new` function without the
corresponding header file being included. While this works due to the
compiler deducing the correct function signature, we should obviously
just include the function's declaration file.
|
|
|
a64532e1
|
2017-06-13T11:05:09
|
|
cmake: disable optimization on debug builds
While our debug builds on MSVC platforms already tune the code optimizer
to aid debugging code, all the other platforms still use the default
optimization level. This makes it hard for developers on these platforms
to actually debug code while maintaining his sanity due to optimizations
like inlined code, elided variables etc.
To help this common use case, we can simply follow the MSVC example and
turn off code optimization with "-O0" for debug builds. While it would
be preferable to instead use "-Og" supported by more modern compilers,
we cannot guarantee that this level is available on all supported
platforms.
|
|
|
61399953
|
2017-06-13T11:03:38
|
|
cmake: set "-D_DEBUG" on non-Windows platforms
In our code base, we have some occasions where we use the "_DEBUG"
preprocessor macro to enable additional code which should not be part of
release builds. While we define this flag on MSVC platforms, it is
guarded by the conditional `WIN32 AND NOT CYGWIN` on other platforms
since 19be3f9e6 (Improve MSVC compiler, linker flags, 2013-02-13). While
this condition can be fulfilled by the MSVC platform, it is never
encountered due to being part of the `ELSE` part of `IF (MSVC)`.
The intention of the conditional was most likely to avoid the
preprocessor macro on Cygwin platforms, but to include it on everthing
else. As such, the correct condition here would be `IF (NOT CYGWIN)`
instead. But digging a bit further, the condition is only ever used in
two places:
1. To skip the test in "core::structinit", which should also work on
Cygwin.
2. In "src/win32/git2.rc", where it is used to set additional file
flags. As this file is included in MSVC builds only, it cannot cause
any harm to set "_DEBUG" on Cygwin here.
As such, we can simply drop the conditional and always set "-D_DEBUG" on
all platforms.
|
|
|
e94be4c0
|
2017-06-13T11:08:19
|
|
cmake: remove stale comment on precompiled headers
In commit 9f75a9ce7 (Turning on runtime checks when building debug under
MSVC., 2012-03-30), we introduced a comment "Precompiled headers", which
actually refers to no related commands. Seeing that the comment never
had anything to refer to, we can simply remove it here.
|
|
|
96d02989
|
2017-06-13T08:09:38
|
|
travis: replace use of deprecated homebrew/dupes tap
The formulae provided by the homebrew/dupes tap are deprecated since at
least April 4, 2017, with formulae having been migrated to
homebrew/core.
Replace the deprecated reference to "homebrew/dupes/zlib" with only
"zlib".
|
|
|
2ca088bd
|
2017-06-12T22:47:54
|
|
Merge pull request #4265 from pks-t/pks/read-prefix-tests
Read prefix tests
|
|
|
99e40a67
|
2017-06-12T21:23:44
|
|
Merge pull request #4263 from libgit2/ethomson/config_for_inmemory_repo
Allow creation of a configuration object in an in-memory repository
|
|
|
d9914fb7
|
2017-06-12T21:22:27
|
|
Merge pull request #4266 from libgit2/ethomson/travis-explicit-openssl
travis: install openssl explicitly
|
|
|
844e85f2
|
2017-06-12T20:00:21
|
|
travis: install openssl explicitly
|
|
|
fe9a5dd3
|
2017-06-12T12:00:14
|
|
remote: ensure we can create an anon remote on inmemory repo
Given a wholly in-memory repository, ensure that we can create an
anonymous remote and perform actions on it.
|
|
|
2d486781
|
2017-06-12T12:02:27
|
|
repository: don't fail to create config option in inmemory repo
When in an in-memory repository - without a configuration file - do not
fail to create a configuration object.
|
|
|
9d49a43c
|
2017-06-12T12:01:10
|
|
repository_item_path: return ENOTFOUND when appropriate
Disambiguate error values: return `GIT_ENOTFOUND` when the item cannot
exist in the repository (perhaps because the repository is inmemory or
otherwise not backed by a filesystem), return `-1` when there is a hard
failure.
|
|
|
f148258a
|
2017-06-12T16:19:45
|
|
tests: odb: add tests with multiple backends
Previous to pulling out and extending the fake backend, it was quite
cumbersome to write tests for very specific scenarios regarding
backends. But as we have made it more generic, it has become much easier
to do so. As such, this commit adds multiple tests for scenarios with
multiple backends for the ODB.
The changes also include a test for a very targeted scenario. When one
backend found a matching object via `read_prefix`, but the last backend
returns `GIT_ENOTFOUND` and when object hash verification is turned off,
we fail to reset the error code to `GIT_OK`. This causes us to segfault
later on, when doing a double-free on the returned object.
|
|
|
6e010bb1
|
2017-06-12T15:43:56
|
|
tests: odb: allow passing fake objects to the fake backend
Right now, the fake backend is quite restrained in the way how it
works: we pass it an OID which it is to return later as well as an error
code we want it to return. While this is sufficient for existing tests,
we can make the fake backend a little bit more generic in order to allow
us testing for additional scenarios.
To do so, we change the backend to not accept an error code and OID
which it is to return for queries, but instead a simple array of OIDs
with their respective blob contents. On each query, the fake backend
simply iterates through this array and returns the first matching
object.
|
|
|
369cb45f
|
2017-06-12T15:21:58
|
|
tests: do not reuse OID from backend
In order to make the fake backend more useful, we want to enable it
holding multiple object references. To do so, we need to decouple it
from the single fake OID it currently holds, which we simply move up
into the calling tests.
|
|
|
2add34d0
|
2017-06-12T14:53:46
|
|
tests: odb: move fake backend into its own file
The fake backend used by the test suite `odb::backend::nonrefreshing` is
useful to have some low-level tests for the ODB layer. As such, we move
the implementation into its own `backend_helpers` module.
|
|
|
9927e958
|
2017-06-12T16:01:22
|
|
Merge pull request #4261 from RogerGee/fix_wait_while_ack
smart_protocol: fix parsing of server ACK responses
|
|
|
2ade8fb0
|
2017-06-12T07:33:41
|
|
Merge pull request #4264 from libgit2/ethomson/read_prefix
odb_read_prefix: reset error in backends loop
|
|
|
cb3010c5
|
2017-06-12T12:56:40
|
|
odb_read_prefix: reset error in backends loop
When looking for an object by prefix, we query all the backends so that
we can ensure that there is no ambiguity. We need to reset the `error`
value between backends; otherwise the first backend may find an object
by prefix, but subsequent backends may not. If we do not reset the
`error` value then it will remain at `GIT_ENOTFOUND` and `read_prefix_1`
will fail, despite having actually found an object.
|
|
|
fb3fc837
|
2017-06-12T11:45:09
|
|
repository_item_path: error messages lowercased
|
|
|
bd692809
|
2017-06-11T12:32:00
|
|
Merge pull request #4262 from libgit2/ethomson/bump-v26
Update version number to 0.26
|
|
|
2a3cc403
|
2017-06-11T12:23:34
|
|
Update version number to v0.26
|
|
|
a1b4cafd
|
2017-06-11T12:21:23
|
|
changelog: add some final 0.26 changes
|
|
|
29ef7d3f
|
2017-06-11T10:58:35
|
|
Merge pull request #4254 from pks-t/pks/changelog-v0.26
CHANGELOG: add various changes introduced since v0.25
|
|
|
6f960b55
|
2017-06-11T10:37:46
|
|
Merge pull request #4088 from chescock/packfile-name-using-complete-hash
Ensure packfiles with different contents have different names
|
|
|
d2c4f764
|
2017-06-11T09:54:04
|
|
Merge pull request #4260 from libgit2/ethomson/forced_checkout_2
Update to forced checkout and untracked files
|
|
|
4a0df574
|
2017-06-10T18:46:35
|
|
git_futils_rmdir: only allow `EBUSY` when asked
Only ignore `EBUSY` from `rmdir` when the `GIT_RMDIR_SKIP_NONEMPTY` bit
is set.
|
|
|
83989d70
|
2017-06-08T22:23:53
|
|
checkout: cope with untracked files in directory deletion
When deleting a directory during checkout, do not simply delete the
directory, since there may be untracked files. Instead, go into
the iterator and examine each file.
In the original code (the code with the faulty assumption), we look to
see if there's an index entry beneath the directory that we want to
remove. Eg, it looks to see if we have a workdir entry foo and an
index entry foo/bar.txt. If this is not the case, then the working
directory must have precious files in that directory. This part is okay.
The part that's not okay is if there is an index entry foo/bar.txt. It
just blows away the whole damned directory.
That's not cool.
Instead, by simply pushing the directory itself onto the stack and
iterating each entry, we will deal with the files one by one - whether
they're in the index (and can be force removed) or not (and are
precious).
The original code was a bad optimization, assuming that we didn't need
to git_iterator_advance_into if there was any index entry in the folder.
That's wrong - we could have optimized this iff all folder entries are
in the index.
Instead, we need to simply dig into the directory and analyze its
entries.
|
|
|
0ef405b3
|
2017-02-15T14:05:10
|
|
checkout: do not delete directories with untracked entries
If the `GIT_CHECKOUT_FORCE` flag is given to any of the `git_checkout`
invocations, we remove files which were previously staged. But while
doing so, we unfortunately also remove unstaged files in a directory
which contains at least one staged file, resulting in potential data
loss.
This commit adds two tests to verify behavior.
|
|
e141f079
|
2017-06-10T11:46:09
|
|
smart_protocol: fix parsing of server ACK responses
Fix ACK parsing in wait_while_ack() internal function. This patch
handles the case where multi_ack_detailed mode sends 'ready' ACKs. The
existing functionality would bail out too early, thus causing the
processing of the ensuing packfile to fail if/when 'ready' ACKs were
sent.
|
|
|
a1510880
|
2017-06-07T08:32:41
|
|
CHANGELOG: add various changes introduced since v0.25
|
|
|
e476d528
|
2017-06-08T22:54:30
|
|
Merge pull request #4259 from pks-t/pks/fsync-option-rename
settings: rename `GIT_OPT_ENABLE_SYNCHRONOUS_OBJECT_CREATION`
|
|
|
6c23704d
|
2017-06-08T21:40:18
|
|
settings: rename `GIT_OPT_ENABLE_SYNCHRONOUS_OBJECT_CREATION`
Initially, the setting has been solely used to enable the use of
`fsync()` when creating objects. Since then, the use has been extended
to also cover references and index files. As the option is not yet part
of any release, we can still correct this by renaming the option to
something more sensible, indicating not only correlation to objects.
This commit renames the option to `GIT_OPT_ENABLE_FSYNC_GITDIR`. We also
move the variable from the object to repository source code.
|
|
|
458cea5c
|
2017-06-08T14:22:24
|
|
Merge pull request #4255 from pks-t/pks/buffer-grow-errors
Buffer growing cleanups
|
|
|
90500d81
|
2017-06-08T13:56:22
|
|
Merge pull request #4253 from pks-t/pks/cov-fixes
Coverity fixes
|
|
|
90388aa8
|
2017-06-06T15:02:23
|
|
refdb_fs: be explicit about using null-OID if we cannot resolve ref
|
|
|
78a8f68f
|
2017-06-06T14:57:31
|
|
path: only set dotgit flags when configs were read
|
|
|
9be4c303
|
2017-06-06T14:54:48
|
|
worktree: use `git__free` instead of `free`
|
|
|
0f642f31
|
2017-06-06T14:54:19
|
|
refs: properly report errors from `update_wt_heads`
|
|
|
0c28c72d
|
2017-06-06T14:53:45
|
|
fileops: check return value of `git_path_dirname`
|
|
|
a693b873
|
2017-06-07T10:20:44
|
|
buffer: use `git_buf_init` with length
The `git_buf_init` function has an optional length parameter, which will
cause the buffer to be initialized and allocated in one step. This can
be used instead of static initialization with `GIT_BUF_INIT` followed by
a `git_buf_grow`. This patch does so for two functions where it is
applicable.
|
|
|
4796c916
|
2017-06-07T09:56:31
|
|
buffer: return errors for `git_buf_init` and `git_buf_attach`
Both the `git_buf_init` and `git_buf_attach` functions may call
`git_buf_grow` in case they were given an allocation length as
parameter. As such, it is possible for these functions to fail when we
run out of memory. While it won't probably be used anytime soon, it does
indeed make sense to also record this fact by returning an error code
from both functions. As they belong to the internal API only, this
change does not break our interface.
|
|
|
9a8386a2
|
2017-06-07T09:50:54
|
|
buffer: consistently use `ENSURE_SIZE` to grow buffers on-demand
The `ENSURE_SIZE` macro can be used to grow a buffer if its currently
allocated size does not suffice a required target size. While most of
the code already uses this macro, the `git_buf_join` and `git_buf_join3`
functions do not yet use it. Due to the macro first checking whether we
have to grow the buffer at all, this has the benefit of saving a
function call when it is not needed. While this is nice to have, it will
probably not matter at all performance-wise -- instead, this only serves
for consistency across the code.
|
|
|
e82dd813
|
2017-06-08T11:52:32
|
|
buffer: fix `ENSURE_SIZE` macro referencing wrong variable
While the `ENSURE_SIZE` macro gets a reference to both the buffer that
is to be resized and a new size, we were not consistently referencing
the passed buffer, but instead a variable `buf`, which is not passed in.
Funnily enough, we never noticed because our buffers seem to always be
named `buf` whenever the macro was being used.
Fix the macro by always using the passed-in buffer. While at it, add
braces around all mentions of passed-in variables as should be done with
macros to avoid subtle errors.
Found-by: Edward Thompson
|
|
|
97eb5ef0
|
2017-06-07T10:05:54
|
|
buffer: rely on `GITERR_OOM` set by `git_buf_try_grow`
The function `git_buf_try_grow` consistently calls `giterr_set_oom`
whenever growing the buffer fails due to insufficient memory being
available. So in fact, we do not have to do this ourselves when a call
to any buffer-growing function has failed due to an OOM situation. But
we still do so in two functions, which this patch cleans up.
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3a8801ae
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2017-06-08T10:55:47
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Merge pull request #4258 from pks-t/pks/sha1dc-update
SHA1DC update
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db1abffa
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2017-06-07T14:59:38
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sha1dc: do not use standard includes
The updated SHA1DC library allows us to use custom includes instead of
using standard includes. Due to requirements with cross-platform, we
provide some custom system includes files like for example the
"stdint.h" file on Win32. Because of this, we want to make sure to avoid
breaking cross-platform compatibility when SHA1DC is enabled.
To use the new mechanism, we can simply define
`SHA1DC_NO_STANDARD_INCLUDES`. Furthermore, we can specify custom
include files via two defines, which we now use to include our
"common.h" header.
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63d86c27
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2017-06-07T14:50:16
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sha1dc: update to fix errors with endianess and unaligned access
This updates our version of SHA1DC to e139984 (Merge pull request #35
from lidl/master, 2017-05-30).
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3bc95cfe
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2017-06-07T14:42:12
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Merge pull request #4236 from pks-t/pks/index-v4-fixes
Fix path computations for compressed index entries
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6a13cf1e
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2017-06-07T13:56:22
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Merge pull request #4256 from libgit2/ethomson/unc_tests
(Temporarily) disable UNC tests
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f218508f
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2017-06-07T10:54:48
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ctest: temporarily disable UNC path tests
(Temporarily) disable UNC path tests to work around AppVeyor issues.
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40139fe6
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2017-06-07T07:38:06
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Merge pull request #4251 from Keruspe/master
Fix build with libressl
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f28744a5
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2017-06-05T10:11:20
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openssl_stream: fix building with libressl
OpenSSL v1.1 has introduced a new way of initializing the library
without having to call various functions of different subsystems. In
libgit2, we have been adapting to that change with 88520151f
(openssl_stream: use new initialization function on OpenSSL version
>=1.1, 2017-04-07), where we added an #ifdef depending on the OpenSSL
version. This change broke building with libressl, though, which has not
changed its API in the same way.
Fix the issue by expanding the #ifdef condition to use the old way of
initializing with libressl.
Signed-off-by: Marc-Antoine Perennou <Marc-Antoine@Perennou.com>
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92d3ea4e
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2017-05-19T13:04:32
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tests: index::version: improve write test for index v4
The current write test does not trigger some edge-cases in the index
version 4 path compression code. Rewrite the test to start off the an
empty standard repository, creating index entries with interesting paths
itself. This allows for more fine-grained control over checked paths.
Furthermore, we now also verify that entry paths are actually
reconstructed correctly.
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8fe33538
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2017-05-19T12:45:48
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tests: index::version: verify we write compressed index entries
While we do have a test which checks whether a written index of version
4 has the correct version set, we do not check whether this actually
enables path compression for index entries. This commit adds a new test
by adding a number of index entries with equal path prefixes to the
index and subsequently flushing that to disk. With suffix compression
enabled by index version 4, only the last few bytes of these paths will
actually have to be written to the index, saving a lot of disk space.
For the test, differences are about an order of magnitude, allowing us
to easily verify without taking a deeper look at actual on-disk
contents.
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82368b1b
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2017-05-12T10:04:42
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tests: index::version: add test to read index version v4
While we have a simple test to determine whether we can write an index
of version 4, we never verified that we are able to read this kind of
index (and in fact, we were not able to do so). Add a new repository
which has an index of version 4. This repository is then read from a new
test.
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fea0c81e
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2017-05-12T09:09:07
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tests: index::version: move up cleanup function
The init and cleanup functions for test suites are usually prepended to
our actual tests. The index::version test suite does not adhere to this
stile. Fix this.
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064a60e9
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2017-05-19T14:06:15
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index: verify we have enough space left when writing index entries
In our code writing index entries, we carry around a `disk_size`
representing how much memory we have in total and pass this value to
`git_encode_varint` to do bounds checks. This does not make much sense,
as at the time when passing on this variable it is already out of date.
Fix this by subtracting used memory from `disk_size` as we go along.
Furthermore, assert we've actually got enough space left to do the final
path memcpy.
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c71dff7e
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2017-05-19T13:49:34
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index: fix shared prefix computation when writing index entry
When using compressed index entries, each entry's path is preceded by a
varint encoding how long the shared prefix with the previous index entry
actually is. We currently encode a length of `(path_len - same_len)`,
which is doubly wrong. First, `path_len` is already set to `path_len -
same_len` previously. Second, we want to encode the shared prefix rather
than the un-shared suffix length.
Fix this by using `same_len` as the varint value instead.
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83e0392c
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2017-05-19T13:39:05
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index: also sanity check entry size with compressed entries
We have a check in place whether the index has enough data left for the
required footer after reading an index entry, but this was only used for
uncompressed entries. Move the check down a bit so that it is executed
for both compressed and uncompressed index entries.
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350d2c47
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2017-05-19T14:22:35
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index: remove file-scope entry size macros
All index entry size computations are now performed in
`index_entry_size`. As such, we do not need the file-scope macros for
computing these sizes anymore. Remove them and move the `entry_size`
macro into the `index_entry_size` function.
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46b67034
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2017-05-19T13:59:53
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index: don't right-pad paths when writing compressed entries
Our code to write index entries to disk does not check whether the
entry that is to be written should use prefix compression for the path.
As such, we were overallocating memory and added bogus right-padding
into the resulting index entries. As there is no padding allowed in the
index version 4 format, this should actually result in an invalid index.
Fix this by re-using the newly extracted `index_entry_size` function.
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29f498e0
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2017-05-19T13:38:34
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index: move index entry size computation into its own function
Create a new function `index_entry_size` which encapsulates the logic to
calculate how much space is needed for an index entry, whether it is
simple/extended or compressed/uncompressed. This can later be re-used by
our code writing index entries.
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8ceb890b
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2017-05-19T12:35:21
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index: set last written index entry in foreach-entry-loop
The last written disk entry is currently being written inside of the
function `write_disk_entry`. Make behavior a bit more obviously by
instead setting it inside of `write_entries` while iterating all
entries.
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11d0be23
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2017-05-12T10:01:43
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index: set last entry when reading compressed entries
To calculate the path of a compressed index entry, we need to know the
preceding entry's path. While we do actually set the first predecessor
correctly to "", we fail to update this while reading the entries.
Fix the issue by updating `last` inside of the loop. Previously, we've
been passing a double-pointer to `read_entry`, which it didn't update.
As it is more obvious to update the pointer inside the loop itself,
though, we can simply convert it to a normal pointer.
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febe8c14
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2017-05-10T14:27:12
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index: fix confusion with shared prefix in compressed path names
The index version 4 introduced compressed path names for the entries.
From the git.git index-format documentation:
At the beginning of an entry, an integer N in the variable width
encoding [...] is stored, followed by a NUL-terminated string S.
Removing N bytes from the end of the path name for the previous
entry, and replacing it with the string S yields the path name for
this entry.
But instead of stripping N bytes from the previous path's string and
using the remaining prefix, we were instead simply concatenating the
previous path with the current entry path, which is obviously wrong.
Fix the issue by correctly copying the first N bytes of the previous
entry only and concatenating the result with our current entry's path.
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8a5e7aae
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2017-05-22T12:53:44
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varint: fix computation for remaining buffer space
When encoding varints to a buffer, we want to remain sure that the
required buffer space does not exceed what is actually available. Our
current check does not do the right thing, though, in that it does not
honor that our `pos` variable counts the position down instead of up. As
such, we will require too much memory for small varints and not enough
memory for big varints.
Fix the issue by correctly calculating the required size as
`(sizeof(varint) - pos)`. Add a test which failed before.
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dd0aa811
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2017-06-04T22:46:07
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Merge branch 'pr/4228'
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