|
1b329089
|
2017-05-31T22:27:19
|
|
config_file: refuse modifying included variables
Modifying variables pulled in by an included file currently succeeds,
but it doesn't actually do what one would expect, as refreshing the
configuration will cause the values to reappear. As we are currently not
really able to support this use case, we will instead just return an
error for deleting and setting variables which were included via an
include.
|
|
|
3a7f7a6e
|
2017-05-31T14:43:46
|
|
config_file: pass reader directly to callbacks
Previously, the callbacks passed to `config_parse` got the reader via a
pointer to a pointer. This allowed the callbacks to update the callers
`reader` variable when the array holding it has been reallocated. As the
array is no longer present, we can simply the code by making the reader
a simple pointer.
|
|
|
73df75d8
|
2017-05-31T14:34:48
|
|
config_file: refactor include handling
Current code for configuration files uses the `reader` structure to
parse configuration files and store additional metadata like the file's
path and checksum. These structures are stored within an array in the
backend itself, which causes multiple problems.
First, it does not make sense to keep around the file's contents with
the backend itself. While this data is usually free'd before being added
to the backend, this brings along somewhat intricate lifecycle problems.
A better solution would be to store only the file paths as well as the
checksum of the currently parsed content only.
The second problem is that the `reader` structures are stored inside an
array. When re-parsing configuration files due to changed contents, we
may cause this array to be reallocated, requiring us to update pointers
hold by callers. Furthermore, we do not keep track of includes which
are already associated to a reader inside of this array. This causes us
to add readers multiple times to the backend, e.g. in the scenario of
refreshing configurations.
This commit fixes these shortcomings. We introduce a split between the
parsing data and the configuration file's metadata. The `reader` will
now only hold the file's contents and the parser state and the new
`config_file` structure holds the file's path and checksum. Furthermore,
the new structure is a recursive structure in that it will also hold
references to the files it directly includes. The diskfile is changed to
only store the top-level configuration file.
These changes allow us further refactorings and greatly simplify
understanding the code.
|
|
|
28c2cc3d
|
2017-05-31T16:41:44
|
|
config_file: move reader into `config_read` only
Right now, we have multiple call sites which initialize a `reader`
structure. As the structure is only actually used inside of
`config_read`, we can instead just move the reader inside of the
`config_read` function. Instead, we can just pass in the configuration
file into `config_read`, which eases code readability.
|
|
|
83bcd3a1
|
2017-05-31T22:45:25
|
|
config_file: refresh all files if includes were modified
Currently, we only re-parse the top-level configuration file when it has
changed itself. This can cause problems when an include is changed, as
we were not updating all values correctly.
Instead of conditionally reparsing only refreshed files, the logic
becomes much clearer and easier to follow if we always re-parse the
top-level configuration file when either the file itself or one of its
included configuration files has changed on disk. This commit implements
this logic.
Note that this might impact performance in some cases, as we need to
re-read all configuration files whenever any of the included files
changed. It could increase performance to just re-parse include files
which have actually changed, but this would compromise maintainability
of the code without much gain. The only case where we will gain anything
is when we actually use includes and when only these includes are
updated, which will probably be quite an unusual scenario to actually be
worthwhile to optimize.
|
|
|
56a7a264
|
2017-05-31T14:50:40
|
|
config_file: remove unused backend field from parse data
The backend passed to `config_read` is never actually used anymore, so
we can remove it from the function and the `parse_data` structure.
|
|
|
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.
|
|
a1023a43
|
2017-05-20T17:18:07
|
|
Merge pull request #4179 from libgit2/ethomson/expand_tilde
Introduce home directory expansion function for config files, attribute files
|
|
|
4467aeac
|
2017-03-28T09:00:48
|
|
config_file: handle errors other than OOM while parsing section headers
The current code in `parse_section_header_ext` is only prepared to
properly handle out-of-memory conditions for the `git_buf` structure.
While very unlikely and probably caused by a programming error, it is
also possible to run into error conditions other than out-of-memory
previous to reaching the actual parsing loop. In these cases, we will
run into undefined behavior as the `rpos` variable is only initialized
after these triggerable errors, but we use it in the cleanup-routine.
Fix the issue by unifying the function's cleanup code with an
`end_error` section, which will not use the `rpos` variable.
|
|
29aef948
|
2017-03-23T11:59:06
|
|
config, attrcache: don't fallback to dirs literally named `~`
The config and attrcache file reading code would attempt to load a file
in a home directory by expanding the `~` and looking for the file, using
`git_sysdir_find_global_file`. If the file was not found, the error
handling would look for the literal path, eg `~/filename.txt`.
Use the new `git_config_expand_global_file` instead, which allows us to
get the path to the file separately, when the path is prefixed with
`~/`, and fail with a not found error without falling back to looking
for the literal path.
|
|
301dc26a
|
2016-06-20T13:15:35
|
|
fix error when including a missing config file relative to the home directory
|
|
|
2cf48e13
|
2017-03-20T09:34:41
|
|
config_file: check if section header buffer runs out of memory
While parsing section headers, we use a buffer to store the actual
section name. We do not check though if the buffer runs out of memory at
any stage. Do so.
|
|
|
13c3bc9a
|
2017-01-27T14:32:23
|
|
strmap: remove GIT__USE_STRMAP macro
|
|
|
73028af8
|
2017-01-27T14:20:24
|
|
khash: avoid using macro magic to get return address
|
|
909d5494
|
2016-12-29T12:25:15
|
|
giterr_set: consistent error messages
Error messages should be sentence fragments, and therefore:
1. Should not begin with a capital letter,
2. Should not conclude with punctuation, and
3. Should not end a sentence and begin a new one
|
|
ab96ca55
|
2016-10-06T13:15:31
|
|
Make sure we use the `C` locale for `regcomp` on macOS.
|
|
|
2f0450f4
|
2016-03-29T03:26:43
|
|
Merge pull request #3712 from ethomson/config_duplicate_section
config: don't write duplicate section
|
|
|
e25e1ca1
|
2016-03-28T11:13:51
|
|
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.
|
|
6f09911c
|
2016-03-21T21:10:26
|
|
config: don't special-case multivars that don't exist yet
This special-casing ignores that we might have a locked file, so the
hashtable does not represent the contents of the file we want to
write. This causes multivar writes to overwrite entries instead of add
to them when under lock.
There is no need for this as the normal code-path will write to the file
just fine, so simply get rid of it.
|
|
|
77394a27
|
2016-03-14T19:15:20
|
|
Merge pull request #3677 from pks-t/pks/coverity-fixes-round7
Coverity fixes round 7
|
|
|
836447e5
|
2016-03-10T16:52:09
|
|
config_file: handle error when trying to lock strmap
Accessing the current values map is handled through the
`refcounder_strmap_take` function, which first acquires a mutex
before accessing its values. While this assures everybody is
trying to access the values with the mutex only we do not check
if the locking actually succeeds.
Fix the issue by checking if acquiring the lock succeeds and
returning `NULL` if we encounter an error. Adjust callers.
|
|
|
e126bc95
|
2016-03-01T14:40:17
|
|
config_file: handle missing quotation marks in section header
When parsing a section header we expect something along the
format of '[section "subsection"]'. When a section is
mal-formated and is entirely missing its quotation marks we catch
this case by observing that `strchr(line, '"') - strrchr(line,
'"') = NULL - NULL = 0` and error out. Unfortunately, the error
message is misleading though, as we state that we are missing the
closing quotation mark while we in fact miss both quotation
marks.
Improve the error message by explicitly checking if the first
quotation mark could be found and, if not, stating that quotation
marks are completely missing.
|
|
|
eb597799
|
2015-10-29T21:12:37
|
|
filebuf: use a checksum to detect file changes
Instead of relying on the size and timestamp, which can hide changes
performed in the same second, hash the file content's when we care about
detecting changes.
|
|
|
cd677b8f
|
2015-09-18T12:28:05
|
|
config: buffer comments to match git's variable-adding
When there is a comment at the end of a section, git keeps it there,
while we write the new variable right at the end.
Keep comments buffered and dump them when we're going to output a
variable or section, or reach EOF. This puts us in line with the config
files which git produces.
|
|
|
b1667039
|
2015-06-01T19:17:03
|
|
config: implement basic transactional support
When a configuration file is locked, any updates made to it will be done
to the in-memory copy of the file. This allows for multiple updates to
happen while we hold the lock, preventing races during complex
config-file manipulation.
|
|
|
3ce9e4d2
|
2015-06-01T08:45:15
|
|
config: write the modified file to memory
Instead of writing into the filebuf directly, make the functions to
write the modified config file write into a buffer which can then be
dumped into the lockfile for committing.
This allows us to re-use the same code for modifying a locked
configuration, as we can simply skip the last step of dumping the data
to disk.
|
|
75a4636f
|
2015-05-29T16:56:38
|
|
git__tolower: a tolower() that isn't dumb
Some brain damaged tolower() implementations appear to want to
take the locale into account, and this may require taking some
insanely aggressive lock on the locale and slowing down what should
be the most trivial of trivial calls for people who just want to
downcase ASCII.
|
|
|
b162d97a
|
2015-05-05T09:47:16
|
|
config: plug a couple of leaks
|
|
|
63c0cc65
|
2015-04-27T16:29:00
|
|
config: cleanup some now-unused variables
|
|
|
9c26de0f
|
2015-04-27T15:38:44
|
|
config: lock the file for write before reading
When writing a configuration file, we want to take a lock on the
new file (eg, `config.lock`) before opening the configuration file
(`config`) for reading so that we can prevent somebody from changing
the contents underneath us.
|
|
|
2a950c94
|
2015-04-27T10:43:50
|
|
config: write existing lines as-is when rewriting
When updating a configuration file, we want to copy the old data
from the file to preserve comments and funny whitespace, instead
of writing it in some "canonical" format. Thus, we keep a
pointer to the start of the line and the line length to preserve
these things we don't care to rewrite.
|
|
|
bf99390e
|
2015-04-23T16:54:36
|
|
config: examine whole file when writing
Previously we would try to be clever when writing the configuration
file and try to stop parsing (and simply copy the rest of the old
file) when we either found the value we were trying to write,
or when we left the section that value was in, the assumption being
that there was no more work to do.
Regrettably, you can have another section with the same name later
in the file, and we must cope with that gracefully, thus we read the
whole file in order to write a new file.
Now, writing a file looks even more than reading. Pull the config
parsing out into its own function that can be used by both reading
and writing the configuration.
|
|
|
d369d71f
|
2015-04-21T17:18:35
|
|
config: peek returns '\n' on EOF; handle in write
|
|
|
2c8c00c6
|
2015-04-21T12:52:29
|
|
config: validate config keys
|
|
9a810c5e
|
2015-04-16T15:32:16
|
|
git_config_delete: search until last section.
If git_config_delete is to work properly in the presence of duplicate section
headers, it cannot stop searching at the end of the first matching section, as
there may be another matching section later.
When config_write is used for deletion (value = NULL), it may only terminate
when the desired key is found or there are no sections left to parse.
|
|
|
e009a705
|
2015-04-20T00:22:20
|
|
config_file: comment char can be invalid escape
Don't assume that comment chars are comment chars, they may be (an
attempt to be escaped). If so, \; is not a valid escape sequence,
complain.
|
|
|
7f2e61f3
|
2015-04-19T23:55:02
|
|
config_file: parse multilines generously
Combine unquoting and multiline detection to avoid ambiguity when
parsing.
|
|
|
129022ee
|
2015-04-10T09:36:38
|
|
Fix checking of return value for regcomp.
The regcomp function returns a non-zero value if compilation of
a regular expression fails. In most places we only check for
negative values, but positive values indicate an error, as well.
Fix this tree-wide, fixing a segmentation fault when calling
git_config_iterator_glob_new with an invalid regexp.
|
|
|
9a97f49e
|
2014-12-21T15:31:03
|
|
config: borrow refcounted references
This changes the get_entry() method to return a refcounted version of
the config entry, which you have to free when you're done.
This allows us to avoid freeing the memory in which the entry is stored
on a refresh, which may happen at any time for a live config.
For this reason, get_string() has been forbidden on live configs and a
new function get_string_buf() has been added, which stores the string in
a git_buf which the user then owns.
The functions which parse the string value takea advantage of the
borrowing to parse safely and then release the entry.
|
|
c8e02b87
|
2015-02-15T21:07:05
|
|
Remove extra semicolon outside of a function
Without this change, compiling with gcc and pedantic generates warning:
ISO C does not allow extra ‘;’ outside of a function.
|
|
|
a7fa970f
|
2015-02-15T05:13:50
|
|
Merge pull request #2895 from ethomson/alloc_overflow
allocations: test for overflow of requested size
|
|
|
f1453c59
|
2015-02-12T12:19:37
|
|
Make our overflow check look more like gcc/clang's
Make our overflow checking look more like gcc and clang's, so that
we can substitute it out with the compiler instrinsics on platforms
that support it. This means dropping the ability to pass `NULL` as
an out parameter.
As a result, the macros also get updated to reflect this as well.
|
|
|
2884cc42
|
2015-02-11T09:39:38
|
|
overflow checking: don't make callers set oom
Have the ALLOC_OVERFLOW testing macros also simply set_oom in the
case where a computation would overflow, so that callers don't
need to.
|
|
|
392702ee
|
2015-02-09T23:41:13
|
|
allocations: test for overflow of requested size
Introduce some helper macros to test integer overflow from arithmetic
and set error message appropriately.
|
|
17136538
|
2015-02-05T23:39:59
|
|
Reinit `reader` pointer after reading included config file
Fixes #2869. If included file includes more files, it may reallocate
cfg_file->readers, hence invalidate not only `r` pointer, but `result`
pointer as well.
|
|
6f73e026
|
2014-12-24T11:42:50
|
|
Plug some leaks
|
|
b874629b
|
2014-12-04T21:06:59
|
|
Spelling fixes
|
|
ebc13b2b
|
2014-11-02T19:16:49
|
|
Clean up issues include.path issues found during code review.
* Error-handling is cleaned up to only let a file-not-found error
through, not other sorts of errors. And when a file-not-found
error happens, we clean up the error.
* Test now checks that file-not-found introduces no error. And
other minor cleanups.
|
|
|
727ae380
|
2014-11-01T11:21:45
|
|
Make config reading continue after hitting a missing include file.
For example, if you have
[include]
path = foo
and foo didn't exist, git_config_open_ondisk() would just give up
on the rest of the file. Now it ignores the unresolved include
without error and continues reading the rest of the file.
|
|
|
55cb4999
|
2014-10-23T19:05:02
|
|
config: remove the refresh function and backend field
We have been refreshing on read and write for a while now, so
git_config_refresh() is at best a no-op, and might just end up wasting
cycles.
|
|
ad5adacb
|
2014-10-21T09:29:45
|
|
Patch from @carlosmn to refresh the parent config before snapshotting.
|
|
0a641647
|
2014-10-04T23:27:06
|
|
config: Fix multiple trailing spaces before comments not completely trimmed
|
|
|
9dac1f95
|
2014-08-09T10:56:50
|
|
config: a multiline var can start immediately
In the check for multiline, we traverse the backslashes from the end
backwards and int the end assert that we haven't gone past the beginning
of the line. We make sure of this in the loop condition, but we also
check in the return value.
However, for certain configurations, a line in a multiline variable
might be empty to aid formatting. In that case, 'end' == 'start', since
we ended up looking at the first char which made it a multiline.
There is no need for the (end > start) check in the return, since the
loop guarantees we won't go further back than the first char in the
line, and we do accept the first char to be the final backslash.
This fixes #2483.
|
|
|
991dab2d
|
2014-07-16T21:09:53
|
|
Make sure \n is at the end of config file before a new section is written
|
|
4af0ef96
|
2014-05-15T11:09:49
|
|
Fix mutex init/free in config_file.c
|
|
a37aa82e
|
2014-05-13T15:54:23
|
|
Some coverity inspired cleanups
|
|
|
b1914c36
|
2014-05-12T10:24:46
|
|
Minor fixes for warnings and error propagation
|
|
|
2280b388
|
2014-04-09T13:17:51
|
|
config: share the strmap on snapshot
Now that our strmap is no longer modified but replaced, we can use the
same strmap for the snapshot's values and it will be freed when we don't
need it anymore.
|
|
|
4b99b8f5
|
2014-04-09T13:08:01
|
|
config: refcount the values map
This is mostly groundwork to let us re-use the map in the snapshots.
|
|
|
8c1f4ab4
|
2014-04-09T12:26:53
|
|
config: refresh on delete
When we delete an entry, we also want to refresh the configuration to
catch any changes that happened externally.
This allows us to simplify the logic, as we no longer need to delete
these variables internally. The whole state will be refreshed and the
deleted entries won't be there.
|
|
|
523032cd
|
2014-03-31T09:58:44
|
|
config: refresh before reading a value
With the isolation of complex reads, we can now try to refresh the
on-disk file before reading a value from it.
This changes the semantics a bit, as before we could be sure that a
string we got from the configuration was valid until we wrote or
refreshed. This is no longer the case, as a read can also invalidate the
pointer.
|
|
|
eaf37034
|
2014-03-31T08:53:56
|
|
config: refresh the values on write
When writing out, parse the resulting file instead of adding or
replacing the value locally. This has the effect of reading external
changes as well.
|
|
|
0500a1ef
|
2014-03-31T08:32:45
|
|
config: use a snapshot for the iterator
|
|
|
bd95f836
|
2014-03-31T08:08:17
|
|
config: split out the refresh step
This will be used by the writing commands in a later step.
|
|
|
c047317e
|
2014-03-18T17:54:32
|
|
config: make refresh atomic
Current code sets the active map to a new one and builds it whilst it's
active. This is a race condition with someone else trying to access the
same config.
Instead, let's build up our new map and swap the active and new one.
|
|
|
55ebd7d3
|
2014-03-13T17:11:34
|
|
config: implement config snapshotting
In order to have consistent views of the config files for remotes,
submodules et al. and a configuration that represents what is currently
stored on-disk, we need a way to provide a view of the configuration
that does not change.
The goal here is to provide the snapshotting part by creating a
read-only copy of the state of the configuration at a particular point
in time, which does not change when a repository's main config changes.
|
|
|
40ed4990
|
2014-02-11T14:45:37
|
|
Add diff threading tests and attr file cache locks
This adds a basic test of doing simultaneous diffs on multiple
threads and adds basic locking for the attr file cache because
that was the immediate problem that arose from these tests.
|
|
|
83634d38
|
2014-02-24T17:43:10
|
|
Move system directory cache out of utils
|
|
a8e4cb11
|
2014-01-13T22:12:17
|
|
Fix a memory leak in `config_parse`.
|
|
6014b7b5
|
2013-12-30T18:08:04
|
|
Fixed a compile error in VS2013.
|
|
|
9f77b3f6
|
2013-11-25T14:21:34
|
|
Add config read fns with controlled error behavior
This adds `git_config__lookup_entry` which will look up a key in
a config and return either the entry or NULL if the key was not
present. Optionally, it can either suppress all errors or can
return them (although not finding the key is not an error for this
function). Unlike other accessors, this does not normalize the
config key string, so it must only be used when the key is known
to be in normalized form (i.e. all lower-case before the first dot
and after the last dot, with no invalid characters).
This also adds three high-level helper functions to look up config
values with no errors and a fallback value. The three functions
are for string, bool, and int values, and will resort to the
fallback value for any error that arises. They are:
* `git_config__get_string_force`
* `git_config__get_bool_force`
* `git_config__get_int_force`
None of them normalize the config `key` either, so they can only
be used for internal cases where the key is known to be in normal
format.
|
|
a1d35ede
|
2013-11-10T16:41:41
|
|
config_file: style
|
|
b9cb72c2
|
2013-11-10T07:33:11
|
|
Merge pull request #1950 from csware/quote-config-values
Correctly quote config values while saving
|
|
590c5efb
|
2013-11-07T17:51:43
|
|
Rename method
Signed-off-by: Sven Strickroth <email@cs-ware.de>
|
|
|
fde93250
|
2013-11-07T13:17:36
|
|
Correctly quote config values while saving
If the value contains a command (; or #) char or starts or ends with space it needs to be quoted.
Signed-off-by: Sven Strickroth <email@cs-ware.de>
|
|
61080a95
|
2013-11-05T15:10:02
|
|
Fix leaks
|
|
|
e8162fd0
|
2013-11-05T12:01:14
|
|
Propagate ELOCKED error when updating the config
|
|
|
1d3a8aeb
|
2013-11-04T18:28:57
|
|
move mode_t to filebuf_open instead of _commit
|
|
|
a7a64d2c
|
2013-11-02T18:36:34
|
|
remote: don't write too much when dealing with multivars
We used to move `data_start` forward, which is wrong as that needs to
point to the beginning of the buffer in order to perform size
calculations.
Introduce a `write_start` variable which indicates where we should start
writing from, which is what the `data_start` was being wrongly reused to
be.
|
|
|
b22593fb
|
2013-11-01T17:28:59
|
|
config_file: Style fixes
|
|
a71331eb
|
2013-10-31T23:41:48
|
|
Fix memory leaks.
|
|
|
3793fa9b
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2013-10-31T01:08:50
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Fix saving remotes with several fetch/push ref specs.
At some moment git_config_delete_entry lost the ability to delete one entry of
a multivar configuration. The moment you had more than one fetch or push
ref spec for a remote you will not be able to save that remote anymore. The
changes in network::remote::remotes::save show that problem.
I needed to create a new git_config_delete_multivar because I was not able to
remove one or several entries of a multivar config with the current API.
Several tries modifying how git_config_set_multivar(..., NULL) behaved were
not successful.
git_config_delete_multivar is very similar to git_config_set_multivar, and
delegates into config_delete_multivar of config_file. This function search
for the cvar_t that will be deleted, storing them in a temporal array, and
rebuilding the linked list. After calling config_write to delete the entries,
the cvar_t stored in the temporal array are freed.
There is a little fix in config_write, it avoids an infinite loop when using
a regular expression (case for the multivars). This error was found by the
test network::remote::remotes::tagopt.
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566dd8ce
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2013-09-30T23:38:22
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Config subsection name should allow to have ']' and '\\' should allow to escape any characters
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92d19d16
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2013-09-21T09:34:03
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Merge pull request #1840 from linquize/warning
Fix warning
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66566516
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2013-09-08T17:15:42
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Fix warning
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a9f51e43
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2013-09-11T22:00:36
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Merge git_buf and git_buffer
This makes the git_buf struct that was used internally into an
externally available structure and eliminates the git_buffer.
As part of that, some of the special cases that arose with the
externally used git_buffer were blended into the git_buf, such as
being careful about git_buf objects that may have a NULL ptr and
allowing for bufs with a valid ptr and size but zero asize as a
way of referring to externally owned data.
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53ea0513
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2013-09-07T19:07:39
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config: handle realloc issues from larger depths
As the include depth increases, the chance of a realloc
increases. This means that whenever we run git_array_alloc() or call
config_parse(), we need to remember what our reader's index is so we
can look it up again.
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69789922
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2013-09-07T18:50:35
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config: return an error when reaching the maximum include depth
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73fc5e01
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2013-09-06T21:12:26
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config: fix variable overriding
When two or more variables of the same name exist and the user asks
for a scalar, we must return the latest value assign to it.
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a9fb7989
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2013-09-06T20:51:35
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config: refresh included files
We need to refresh the variables from the included files if they are
changed, so loop over all included files and re-parse the files if any
of them has changed.
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19be0692
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2013-09-06T20:34:02
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config: keep a list of included files
When refreshing we need to refresh if any of the files have been
touched, so we need to keep the list.
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d8d25acb
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2013-09-05T19:24:20
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config: add support for include directives
Relative, absolute and home-relative paths are supported. The
recursion limit it set at 10, just like in git.
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d209cc47
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2013-09-05T18:06:12
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config: decouple the backend from the reader at the low level
In order to support config includes, we must differentiate between the
backend's main file and the file we are currently parsing.
This lays the groundwork for includes, keeping the current behaviours.
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b8b22d77
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2013-08-28T06:04:51
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Merge pull request #1772 from libgit2/config-iter
Configuration iterators redux
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f4be8209
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2013-08-14T00:45:05
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config: don't special-case the multivar iterator
Build it on top of the normal iterator instead, which lets use re-use
a lot of code.
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43e5dda7
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2013-08-12T11:21:57
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config: get rid of a useless asignment
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5880962d
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2013-08-09T09:05:19
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config: introduce _iterator_new()
As the name suggests, it iterates over all the entries
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7f7ebe13
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2013-08-08T12:57:13
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Merge pull request #1771 from nvloff/write_empty_config_value
config: allow setting empty string as value
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c57f6682
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2013-08-08T21:17:32
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config: allow empty string as value
`git_config_set_string(config, "config.section", "")` fails when
escaping the value.
The buffer in `escape_value` is allocated without NULL-termination. And
in case of empty string 0 is passed for buffer size in `git_buf_grow`.
`git_buf_detach` returns NULL when the allocated size is 0 and that
leads to an error return in `GITERR_CHECK_ALLOC` called after
`escape_value`
The change in `config_file.c` was suggested by Russell Belfer <rb@github.com>
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99dfb538
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2013-08-08T17:57:59
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config: working multivar iterator
Implement the foreach version as a wrapper around the iterator.
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