odb_loose: fix undefined behavior when computing size
An object's size is computed by reading the object header's size
field until the most significant bit is not set anymore. To get
the total size, we increase the shift on each iteration and add
the shifted value to the total size.
We read the current value into a variable of type `unsigned
char`, from which we then take all bits except the most
significant bit and shift the result. We will end up with a
maximum shift of 60, but this exceeds the width of the value's
type, resulting in undefined behavior.
Fix the issue by instead reading the values into a variable of
type `unsigned long`, which matches the required width. This is
equivalent to git.git, which uses an `unsigned long` as well.
checkout: set ignorecase=0 when config lookup fails
When `git_repository__cvar` fails we may end up with a
`ignorecase` value of `-1`. As we subsequently check if
`ignorecase` is non-zero, we may end up reporting that data
should be removed when in fact it should not.
Err on the safer side and set `ignorecase = 0` when
`git_repository__cvar` fails.
merge_file: do not unnecessarily check ours/theirs for NULL
The `merge_file__xdiff` function checks if either `ours` or
`theirs` is `NULL`. The function is to be called with existing
files, though, and in fact already unconditionally dereferences
both pointers.
Edward Thomson [Tue, 26 Apr 2016 15:39:53 +0000 (11:39 -0400)]
annotated_commit: provide refs and description
Differentiate between the ref_name used to create an annotated_commit
(that can subsequently be used to look up the reference) and the
description that we resolved this with (which _cannot_ be looked up).
The description is used for things like reflogs (and may be a ref name,
and ID something that we revparsed to get here), while the ref name must
actually be a reference name, and is used for things like rebase to
return to the initial branch.
A return value of 0 can lead to an infinite loop, so the return value
of ssl_set_error will be returned if SSL_read is not successful (analog
to openssl_write).
While no extra header fields are defined for tags, git accepts them by
ignoring them and continuing the search for the message. There are a few
tags like this in the wild which git parses just fine, so we should do
the same.
Edward Thomson [Thu, 21 Apr 2016 21:29:19 +0000 (17:29 -0400)]
rebase: handle detached HEADs in `init`
When `init`ing a rebase from a detached HEAD, be sure to remember
that we were in a detached HEAD state so that we can correctly
`abort` the object that we just created.
ignore: fix directory limits when searching for star-star
In order to match the star-star, we disable the flag that's looking for
a single path element, but that leads to searching for the pattern in
the middle of elements in the input string.
Mark when we're handing a star-star so we jump over the elements in our
attempt to match the part of the pattern that comes after the star-star.
While here, tighten up the check so we don't allow invalid rules
through.
CI: start the proxy before the build so it's ready
It takes a bit for the propxy to get ready to accept connections, so
start it before the build so we can be reasonably sure that it's going
to be ready in time.
When we're dealing with proxy addresses, we only want a hostname and
port, and the user would not provide a path, so make it optional so we
can use this same function to parse git as well as proxy URLs.
Edward Thomson [Mon, 11 Apr 2016 17:39:31 +0000 (13:39 -0400)]
tests: skip the unreadable file tests as root
When running as root, skip the unreadable file tests, because, well,
they're probably _not_ unreadable to root unless you've got some
crazy NSA clearance-level honoring operating system shit going on.
Edward Thomson [Mon, 11 Apr 2016 15:50:11 +0000 (11:50 -0400)]
refs::create: strict object creation on by default
When we turned strict object creation validation on by default, we
forgot to inform the refs::create tests of this. They, in fact,
believed that strict object creation was off by default. As a result,
their cleanup function went and turned strict object creation off for
the remaining tests.
refs: provide a more general error message for dwim
If we cannot dwim the input, set the error message to be explicit about
that. Otherwise we leave the error for the last failed lookup, which
can be rather unexpected as it mentions a remote when the user thought
they were trying to look up a branch.
This has not been a supported build mode for quite some time, and it
correspondingly hasn't worked to build the library for a long time. Get
rid of it, as the only build mode we support is though CMakek.
Edward Thomson [Sat, 2 Apr 2016 20:03:09 +0000 (13:03 -0700)]
iterator: support trailing `/` in start for submod
Allow callers to specify a start path with a trailing slash to match
a submodule, instead of just a directory. This is for some legacy
behavior that's sort of dumb, but there it is.
If we're looking for a symlink, realpath will give us the resolved path,
which is not what we're after, but a canonicalized version of the path
the user asked for.
The code initializing the merge driver registry accidentally
forgot a `goto done` in case of an error. Because of this the
next line, which registers the global shutdown callback for the
merge drivers, is only called when an error occured.
Fix this by adding the missing `goto done`. This fixes some
memory leaks when the global state is shut down.
Clang's documentation parser, which we use in our documentation system
does not report any comments for functions which use size_t as a type.
The root cause is buried somewhere in libclang but we can work around it
by defining the type ourselves. This typedef makes sure that libclang
sees it and that we do not change its size.
The xdl_prepare_env() function may initialise an xdlclassifier_t
data structure via xdl_init_classifier(), which allocates memory
to several fields, for example 'rchash', 'rcrecs' and 'ncha'.
If this function later exits due to the failure of xdl_optimize_ctxs(),
then this xdlclassifier_t structure, and the memory allocated to it,
is not cleaned up.
In order to fix the memory leak, insert a call to xdl_free_classifier()
before returning.
xdiff/xprepare: use the XDF_DIFF_ALG() macro to access flag bits
Commit 307ab20b3 ("xdiff: PATIENCE/HISTOGRAM are not independent option
bits", 19-02-2012) introduced the XDF_DIFF_ALG() macro to access the
flag bits used to represent the diff algorithm requested. In addition,
code which had used explicit manipulation of the flag bits was changed
to use the macros.
However, one example of direct manipulation remains. Update this code to
use the XDF_DIFF_ALG() macro.
Edward Thomson [Mon, 28 Mar 2016 15:13:51 +0000 (11:13 -0400)]
config: don't write section header if we're in it
If we hit the EOF while trying to write a new value, it may be that
we're already in the section that we were looking for. If so, do not
write a (duplicate) section header, just write the value.
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