Commit Graph

119 Commits

Author SHA1 Message Date
Martin Ågren
c0e9f5be87 config: change default of pager.config to "on"
This is similar to ff1e72483 (tag: change default of `pager.tag` to
"on", 2017-08-02) and is safe now that we do not consider `pager.config`
at all when we are not listing or getting configuration. This change
will help with listing large configurations, but will not hurt users of
`git config --edit` as it would have before the previous commit.

Signed-off-by: Martin Ågren <martin.agren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-02-21 14:27:30 -08:00
Martin Ågren
32888b8fd5 config: respect pager.config in list/get-mode only
Similar to de121ffe5 (tag: respect `pager.tag` in list-mode only,
2017-08-02), use the DELAY_PAGER_CONFIG-mechanism to only respect
`pager.config` when we are listing or "get"ing config.

We have several getters and some are guaranteed to give at most one line
of output. Paging all getters including those could be convenient from a
documentation point-of-view. The downside would be that a misconfigured
or not so modern pager might wait for user interaction before
terminating. Let's instead respect the config for precisely those
getters which may produce more than one line of output.

`--get-urlmatch` may or may not produce multiple lines of output,
depending on the exact usage. Let's not try to recognize the two modes,
but instead make `--get-urlmatch` always respect the config. Analyzing
the detailed usage might be trivial enough here, but could establish a
precedent that we will never be able to enforce throughout the codebase
and that will just open a can of worms.

This fixes the failing test added in the previous commit. Also adapt the
test for whether `git config foo.bar bar` and `git config --get foo.bar`
respects `pager.config`.

Signed-off-by: Martin Ågren <martin.agren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-02-21 14:27:29 -08:00
Haaris Mehmood
5f9674243d config: add --expiry-date
Add --expiry-date as a data-type for config files when
'git config --get' is used. This will return any relative
or fixed dates from config files as timestamps.

This is useful for scripts (e.g. gc.reflogexpire) that work
with timestamps so that '2.weeks' can be converted to a format
acceptable by those scripts/functions.

Following the convention of git_config_pathname(), move
the helper function required for this feature from
builtin/reflog.c to builtin/config.c where other similar
functions exist (e.g. for --bool or --path), and match
the order of parameters with other functions (i.e. output
pointer as first parameter).

Signed-off-by: Haaris Mehmood <hsed@unimetic.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-11-18 12:31:29 +09:00
Jeff King
0e5bba53af add UNLEAK annotation for reducing leak false positives
It's a common pattern in git commands to allocate some
memory that should last for the lifetime of the program and
then not bother to free it, relying on the OS to throw it
away.

This keeps the code simple, and it's fast (we don't waste
time traversing structures or calling free at the end of the
program). But it also triggers warnings from memory-leak
checkers like valgrind or LSAN. They know that the memory
was still allocated at program exit, but they don't know
_when_ the leaked memory stopped being useful. If it was
early in the program, then it's probably a real and
important leak. But if it was used right up until program
exit, it's not an interesting leak and we'd like to suppress
it so that we can see the real leaks.

This patch introduces an UNLEAK() macro that lets us do so.
To understand its design, let's first look at some of the
alternatives.

Unfortunately the suppression systems offered by
leak-checking tools don't quite do what we want. A
leak-checker basically knows two things:

  1. Which blocks were allocated via malloc, and the
     callstack during the allocation.

  2. Which blocks were left un-freed at the end of the
     program (and which are unreachable, but more on that
     later).

Their suppressions work by mentioning the function or
callstack of a particular allocation, and marking it as OK
to leak.  So imagine you have code like this:

  int cmd_foo(...)
  {
	/* this allocates some memory */
	char *p = some_function();
	printf("%s", p);
	return 0;
  }

You can say "ignore allocations from some_function(),
they're not leaks". But that's not right. That function may
be called elsewhere, too, and we would potentially want to
know about those leaks.

So you can say "ignore the callstack when main calls
some_function".  That works, but your annotations are
brittle. In this case it's only two functions, but you can
imagine that the actual allocation is much deeper. If any of
the intermediate code changes, you have to update the
suppression.

What we _really_ want to say is that "the value assigned to
p at the end of the function is not a real leak". But
leak-checkers can't understand that; they don't know about
"p" in the first place.

However, we can do something a little bit tricky if we make
some assumptions about how leak-checkers work. They
generally don't just report all un-freed blocks. That would
report even globals which are still accessible when the
leak-check is run.  Instead they take some set of memory
(like BSS) as a root and mark it as "reachable". Then they
scan the reachable blocks for anything that looks like a
pointer to a malloc'd block, and consider that block
reachable. And then they scan those blocks, and so on,
transitively marking anything reachable from a global as
"not leaked" (or at least leaked in a different category).

So we can mark the value of "p" as reachable by putting it
into a variable with program lifetime. One way to do that is
to just mark "p" as static. But that actually affects the
run-time behavior if the function is called twice (you
aren't likely to call main() twice, but some of our cmd_*()
functions are called from other commands).

Instead, we can trick the leak-checker by putting the value
into _any_ reachable bytes. This patch keeps a global
linked-list of bytes copied from "unleaked" variables. That
list is reachable even at program exit, which confers
recursive reachability on whatever values we unleak.

In other words, you can do:

  int cmd_foo(...)
  {
	char *p = some_function();
	printf("%s", p);
	UNLEAK(p);
	return 0;
  }

to annotate "p" and suppress the leak report.

But wait, couldn't we just say "free(p)"? In this toy
example, yes. But UNLEAK()'s byte-copying strategy has
several advantages over actually freeing the memory:

  1. It's recursive across structures. In many cases our "p"
     is not just a pointer, but a complex struct whose
     fields may have been allocated by a sub-function. And
     in some cases (e.g., dir_struct) we don't even have a
     function which knows how to free all of the struct
     members.

     By marking the struct itself as reachable, that confers
     reachability on any pointers it contains (including those
     found in embedded structs, or reachable by walking
     heap blocks recursively.

  2. It works on cases where we're not sure if the value is
     allocated or not. For example:

       char *p = argc > 1 ? argv[1] : some_function();

     It's safe to use UNLEAK(p) here, because it's not
     freeing any memory. In the case that we're pointing to
     argv here, the reachability checker will just ignore
     our bytes.

  3. Likewise, it works even if the variable has _already_
     been freed. We're just copying the pointer bytes. If
     the block has been freed, the leak-checker will skip
     over those bytes as uninteresting.

  4. Because it's not actually freeing memory, you can
     UNLEAK() before we are finished accessing the variable.
     This is helpful in cases like this:

       char *p = some_function();
       return another_function(p);

     Writing this with free() requires:

       int ret;
       char *p = some_function();
       ret = another_function(p);
       free(p);
       return ret;

     But with unleak we can just write:

       char *p = some_function();
       UNLEAK(p);
       return another_function(p);

This patch adds the UNLEAK() macro and enables it
automatically when Git is compiled with SANITIZE=leak.  In
normal builds it's a noop, so we pay no runtime cost.

It also adds some UNLEAK() annotations to show off how the
feature works. On top of other recent leak fixes, these are
enough to get t0000 and t0001 to pass when compiled with
LSAN.

Note the case in commit.c which actually converts a
strbuf_release() into an UNLEAK. This code was already
non-leaky, but the free didn't do anything useful, since
we're exiting. Converting it to an annotation means that
non-leak-checking builds pay no runtime cost. The cost is
minimal enough that it's probably not worth going on a
crusade to convert these kinds of frees to UNLEAKS. I did it
here for consistency with the "sb" leak (though it would
have been equally correct to go the other way, and turn them
both into strbuf_release() calls).

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-09-08 15:43:17 +09:00
Jeff King
6c6b08d269 config: plug user_config leak
We generate filenames for the user_config ("~/.gitconfig")
and the xdg config ("$XDG_CONFIG_HOME/git/config") and then
decide which to use by looking at the filesystem. But after
selecting one, the unused string is just leaked.

This is a tiny leak, but it creates noise in leak-checker
output.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-09-06 18:06:26 +09:00
Junio C Hamano
50f03c6676 Merge branch 'ab/free-and-null'
A common pattern to free a piece of memory and assign NULL to the
pointer that used to point at it has been replaced with a new
FREE_AND_NULL() macro.

* ab/free-and-null:
  *.[ch] refactoring: make use of the FREE_AND_NULL() macro
  coccinelle: make use of the "expression" FREE_AND_NULL() rule
  coccinelle: add a rule to make "expression" code use FREE_AND_NULL()
  coccinelle: make use of the "type" FREE_AND_NULL() rule
  coccinelle: add a rule to make "type" code use FREE_AND_NULL()
  git-compat-util: add a FREE_AND_NULL() wrapper around free(ptr); ptr = NULL
2017-06-24 14:28:41 -07:00
Junio C Hamano
f31d23a399 Merge branch 'bw/config-h'
Fix configuration codepath to pay proper attention to commondir
that is used in multi-worktree situation, and isolate config API
into its own header file.

* bw/config-h:
  config: don't implicitly use gitdir or commondir
  config: respect commondir
  setup: teach discover_git_directory to respect the commondir
  config: don't include config.h by default
  config: remove git_config_iter
  config: create config.h
2017-06-24 14:28:41 -07:00
Ævar Arnfjörð Bjarmason
6a83d90207 coccinelle: make use of the "type" FREE_AND_NULL() rule
Apply the result of the just-added coccinelle rule. This manually
excludes a few occurrences, mostly things that resulted in many
FREE_AND_NULL() on one line, that'll be manually fixed in a subsequent
change.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-06-16 12:44:03 -07:00
Brandon Williams
dc8441fdb4 config: don't implicitly use gitdir or commondir
'git_config_with_options()' takes a 'config_options' struct which
contains feilds for 'git_dir' and 'commondir'.  If those feilds happen
to be NULL the config machinery falls back to querying global repository
state.  Let's change this and instead use these fields in the
'config_options' struct explicilty all the time.  Since the API is
slightly changing to require these two fields to be set if callers want
the config machinery to load the repository's config, let's change the
name to 'config_with_optison()'.  This allows the config machinery to
not implicitly rely on any global repository state.

Signed-off-by: Brandon Williams <bmwill@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-06-15 12:56:22 -07:00
Brandon Williams
b2141fc1d2 config: don't include config.h by default
Stop including config.h by default in cache.h.  Instead only include
config.h in those files which require use of the config system.

Signed-off-by: Brandon Williams <bmwill@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-06-15 12:56:22 -07:00
Jeff King
25cd291963 config: complain about --local outside of a git repo
The "--local" option instructs git-config to read or modify
the repository-level config. This doesn't make any sense if
you're not actually in a repository.

Older versions of Git would blindly try to read or write
".git/config". For reading, this would result in a quiet
failure, since there was no config to read (and thus no
matching config value). Writing would generally fail
noisily, since ".git" was unlikely to exist. But since
b1ef400ee (setup_git_env: avoid blind fall-back to ".git",
2016-10-20), we catch this in the call to git_pathdup() and
die with an assertion.

Dying is the right thing to do, but we should catch the
problem early and give a more human-friendly error message.

Note that even without --local, git-config will sometimes
default to using local repository config (e.g., when
writing). These cases are already protected by similar
checks, and covered by a test in t1308.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-05-15 11:30:51 +09:00
Junio C Hamano
b80f629f5b Merge branch 'jk/war-on-git-path'
While handy, "git_path()" is a dangerous function to use as a
callsite that uses it safely one day can be broken by changes
to other code that calls it.  Reduction of its use continues.

* jk/war-on-git-path:
  am: drop "dir" parameter from am_state_init
  replace strbuf_addstr(git_path()) with git_path_buf()
  replace xstrdup(git_path(...)) with git_pathdup(...)
  use git_path_* helper functions
  branch: add edit_description() helper
  bisect: add git_path_bisect_terms helper
2017-04-26 15:39:08 +09:00
Junio C Hamano
c9672ba4c8 Merge branch 'nd/conditional-config-in-early-config'
The recently introduced conditional inclusion of configuration did
not work well when early-config mechanism was involved.

* nd/conditional-config-in-early-config:
  config: correct file reading order in read_early_config()
  config: handle conditional include when $GIT_DIR is not set up
  config: prepare to pass more info in git_config_with_options()
2017-04-26 15:39:05 +09:00
Junio C Hamano
a2e2c04683 Merge branch 'nd/conditional-config-include'
$GIT_DIR may in some cases be normalized with all symlinks resolved
while "gitdir" path expansion in the pattern does not receive the
same treatment, leading to incorrect mismatch.  This has been fixed.

* nd/conditional-config-include:
  config: resolve symlinks in conditional include's patterns
  path.c: and an option to call real_path() in expand_user_path()
2017-04-23 22:07:46 -07:00
Jeff King
d9c69644b2 replace xstrdup(git_path(...)) with git_pathdup(...)
It's more efficient to use git_pathdup(), as it skips an
extra copy of the path. And by removing some calls to
git_path(), it makes it easier to audit for dangerous uses.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-04-20 21:04:15 -07:00
Nguyễn Thái Ngọc Duy
c48f4b379e config: prepare to pass more info in git_config_with_options()
So far we can only pass one flag, respect_includes, to thie function. We
need to pass some more (non-flag even), so let's make it accept a struct
instead of an integer.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-04-17 19:18:40 -07:00
Nguyễn Thái Ngọc Duy
4aad2f1627 path.c: and an option to call real_path() in expand_user_path()
In the next patch we need the ability to expand '~' to
real_path($HOME). But we can't do that from outside because '~' is part
of a pattern, not a true path. Add an option to expand_user_path() to do
so.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-04-14 23:51:38 -07:00
Jeff King
e4da43b1f0 prefix_filename: return newly allocated string
The prefix_filename() function returns a pointer to static
storage, which makes it easy to use dangerously. We already
fixed one buggy caller in hash-object recently, and the
calls in apply.c are suspicious (I didn't dig in enough to
confirm that there is a bug, but we call the function once
in apply_all_patches() and then again indirectly from
parse_chunk()).

Let's make it harder to get wrong by allocating the return
value. For simplicity, we'll do this even when the prefix is
empty (and we could just return the original file pointer).
That will cause us to allocate sometimes when we wouldn't
otherwise need to, but this function isn't called in
performance critical code-paths (and it already _might_
allocate on any given call, so a caller that cares about
performance is questionable anyway).

The downside is that the callers need to remember to free()
the result to avoid leaking. Most of them already used
xstrdup() on the result, so we know they are OK. The
remainder have been converted to use free() as appropriate.

I considered retaining a prefix_filename_unsafe() for cases
where we know the static lifetime is OK (and handling the
cleanup is awkward). This is only a handful of cases,
though, and it's not worth the mental energy in worrying
about whether the "unsafe" variant is OK to use in any
situation.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-03-21 11:18:41 -07:00
Jeff King
116fb64e43 prefix_filename: drop length parameter
This function takes the prefix as a ptr/len pair, but in
every caller the length is exactly strlen(ptr). Let's
simplify the interface and just take the string. This saves
callers specifying it (and in some cases handling a NULL
prefix).

In a handful of cases we had the length already without
calling strlen, so this is technically slower. But it's not
likely to matter (after all, if the prefix is non-empty
we'll allocate and copy it into a buffer anyway).

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-03-21 11:12:53 -07:00
Vasco Almeida
ccf6380154 i18n: config: mark error message for translation
Signed-off-by: Vasco Almeida <vascomalmeida@sapo.pt>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-09-15 13:17:32 -07:00
Junio C Hamano
7a3ea66633 Merge branch 'js/commit-slab-decl-fix'
* js/commit-slab-decl-fix:
  commit-slab.h: avoid duplicated global static variables
  config.c: avoid duplicated global static variables
2016-08-10 12:33:20 -07:00
Johannes Sixt
dc29ddebb9 config.c: avoid duplicated global static variables
Repeating the definition of a static variable seems to be valid in C.
Nevertheless, it is bad style because it can cause confusion, definitely
when it becomes necessary to change the type.

d64ec16 (git config: reorganize to use parseopt, 2009-02-21) added two
static variables near the top of the file config.c without removing the
definitions of the two variables that occurs later in the file.

The two variables were needed earlier in the file in the newly
introduced parseopt structure. These references were removed later in
d0e08d6 (config: fix parsing of "git config --get-color some.key -1",
2014-11-20).

Remove the redundant, younger, definitions near the top of the file and
keep the original definitions that occur later.

Signed-off-by: Johannes Sixt <j6t@kdbg.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-08-09 10:19:24 -07:00
Jeff King
aabbd3f3c9 config: fix bogus fd check when setting up default config
Since 9830534 (config --global --edit: create a template
file if needed, 2014-07-25), an edit of the global config
file will try to open() it with O_EXCL, and wants to handle
three cases:

  1. We succeeded; the user has no config file, and we
     should fill in the default template.

  2. We got EEXIST; they have a file already, proceed as usual.

  3. We got another error; we should complain.

However, the check for case 1 does "if (fd)", which will
generally _always_ be true (except for the oddball case that
somehow our stdin got closed and opening really did give us
a new descriptor 0).

So in the EEXIST case, we tried to write the default config
anyway! Fortunately, this turns out to be a noop, since we
just end up writing to and closing "-1", which does nothing.

But in case 3, we would fail to notice any other errors, and
just silently continue (given that we don't actually notice
write errors for the template either, it's probably not that
big a deal; we're about to spawn the editor, so it would
notice any problems. But the code is clearly _trying_ to hit
cover this case and failing).

We can fix it easily by using "fd >= 0" for case 1.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-07-08 09:47:28 -07:00
Junio C Hamano
c832cef8aa Merge branch 'jk/config-get-urlmatch'
"git config --get-urlmatch", unlike other variants of the "git
config --get" family, did not signal error with its exit status
when there was no matching configuration.

* jk/config-get-urlmatch:
  Documentation/git-config: fix --get-all description
  Documentation/git-config: use bulleted list for exit codes
  config: fail if --get-urlmatch finds no value
2016-04-03 10:29:26 -07:00
John Keeping
27b30be686 config: fail if --get-urlmatch finds no value
The --get, --get-all and --get-regexp options to git-config exit with
status 1 if the key is not found but --get-urlmatch succeeds in this
case.

Change --get-urlmatch to behave in the same way as the other --get*
options so that all four are consistent.  --get-color is a special case
because it accepts a default value to return and so should not return an
error if the key is not found.

Also clarify this behaviour in the documentation.

Signed-off-by: John Keeping <john@keeping.me.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-02-28 12:01:45 -08:00
Junio C Hamano
d3faba840e Merge branch 'js/config-set-in-non-repository'
"git config section.var value" to set a value in per-repository
configuration file failed when it was run outside any repository,
but didn't say the reason correctly.

* js/config-set-in-non-repository:
  git config: report when trying to modify a non-existing repo config
2016-02-26 13:37:26 -08:00
Junio C Hamano
225caa73f2 Merge branch 'ps/config-error'
Many codepaths forget to check return value from git_config_set();
the function is made to die() to make sure we do not proceed when
setting a configuration variable failed.

* ps/config-error:
  config: rename git_config_set_or_die to git_config_set
  config: rename git_config_set to git_config_set_gently
  compat: die when unable to set core.precomposeunicode
  sequencer: die on config error when saving replay opts
  init-db: die on config errors when initializing empty repo
  clone: die on config error in cmd_clone
  remote: die on config error when manipulating remotes
  remote: die on config error when setting/adding branches
  remote: die on config error when setting URL
  submodule--helper: die on config error when cloning module
  submodule: die on config error when linking modules
  branch: die on config error when editing branch description
  branch: die on config error when unsetting upstream
  branch: report errors in tracking branch setup
  config: introduce set_or_die wrappers
2016-02-26 13:37:19 -08:00
Johannes Schindelin
638fa623d5 git config: report when trying to modify a non-existing repo config
It is a pilot error to call `git config section.key value` outside of
any Git worktree. The message

	error: could not lock config file .git/config: No such file or
	directory

is not very helpful in that situation, though. Let's print a helpful
message instead.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-02-25 10:52:32 -08:00
Patrick Steinhardt
30598ad06f config: rename git_config_set to git_config_set_gently
The desired default behavior for `git_config_set` is to die
whenever an error occurs. Dying is the default for a lot of
internal functions when failures occur and is in this case the
right thing to do for most callers as otherwise we might run into
inconsistent repositories without noticing.

As some code may rely on the actual return values for
`git_config_set` we still require the ability to invoke these
functions without aborting. Rename the existing `git_config_set`
functions to `git_config_set_gently` to keep them available for
those callers.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-02-22 10:23:55 -08:00
Lars Schneider
70bd879ab6 config: add '--show-origin' option to print the origin of a config value
If config values are queried using 'git config' (e.g. via --get,
--get-all, --get-regexp, or --list flag) then it is sometimes hard to
find the configuration file where the values were defined.

Teach 'git config' the '--show-origin' option to print the source
configuration file for every printed value.

Based-on-patch-by: Jeff King <peff@peff.net>
Signed-off-by: Lars Schneider <larsxschneider@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-02-22 09:43:48 -08:00
Jeff King
3ec832c4b5 config: use xstrfmt in normalize_value
We xmalloc a fixed-size buffer and sprintf into it; this is
OK because the size of our formatting types is finite, but
that's not immediately clear to a reader auditing sprintf
calls. Let's switch to xstrfmt, which is shorter and
obviously correct.

Note that just dropping the common xmalloc here causes gcc
to complain with -Wmaybe-uninitialized. That's because if
"types" does not match any of our known types, we never
write anything into the "normalized" pointer. With the
current code, gcc doesn't notice because we always return a
valid pointer (just one which might point to uninitialized
data, but the compiler doesn't know that). In other words,
the current code is potentially buggy if new types are added
without updating this spot.

So let's take this opportunity to clean up the function a
bit more. We can drop the "normalized" pointer entirely, and
just return directly from each code path. And then add an
assertion at the end in case we haven't covered any cases.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-09-25 10:18:18 -07:00
Jeff King
a92330d21c get_urlmatch: avoid useless strbuf write
We create a strbuf only to insert a single string, pass the
resulting buffer to a function (which does not modify the
string), and then free it. We can just pass the original
string instead.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-08-20 13:16:50 -07:00
Jeff King
f225987753 format_config: simplify buffer handling
When formatting a config value into a strbuf, we may end
up stringifying it into a fixed-size buffer using sprintf,
and then copying that buffer into the strbuf. We can
eliminate the middle-man (and drop some calls to sprintf!)
by writing directly to the strbuf.

The reason it was written this way in the first place is
that we need to know before writing the value whether to
insert a delimiter. Instead of delaying the write of the
value, we speculatively write the delimiter, and roll it
back in the single case that cares.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-08-20 13:16:50 -07:00
Jeff King
9f1429df17 format_config: don't init strbuf
It's unusual for a function which writes to a passed-in
strbuf to call strbuf_init; that will throw away anything
already there, leaking memory. In this case, there are
exactly two callers; one relies on this initialization and
the other passes in an already-initialized buffer.

There's no leak, as the initialized buffer doesn't have
anything in it. But let's bump the strbuf_init out to the
one caller who needs it, making format_config more
idiomatic.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-08-20 13:16:50 -07:00
SZEDER Gábor
ebca2d4957 config: restructure format_config() for better control flow
Commit 578625fa91 (config: add '--name-only' option to list only
variable names, 2015-08-10) modified format_config() such that it
returned from the middle of the function when showing only keys,
resulting in ugly code structure.

Reorganize the if statements and dealing with the key-value delimiter to
make the function easier to read.

Signed-off-by: SZEDER Gábor <szeder@ira.uka.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-08-20 13:15:17 -07:00
SZEDER Gábor
578625fa91 config: add '--name-only' option to list only variable names
'git config' can only show values or name-value pairs, so if a shell
script needs the names of set config variables it has to run 'git config
--list' or '--get-regexp' and parse the output to separate config
variable names from their values.  However, such a parsing can't cope
with multi-line values.  Though 'git config' can produce null-terminated
output for newline-safe parsing, that's of no use in such a case, becase
shells can't cope with null characters.

Even our own bash completion script suffers from these issues.

Help the completion script, and shell scripts in general, by introducing
the '--name-only' option to modify the output of '--list' and
'--get-regexp' to list only the names of config variables, so they don't
have to perform error-prone post processing to separate variable names
from their values anymore.

Signed-off-by: SZEDER Gábor <szeder@ira.uka.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-08-10 10:33:58 -07:00
Junio C Hamano
d9c82fa7a7 Merge branch 'pt/xdg-config-path' into maint
Code clean-up for xdg configuration path support.

* pt/xdg-config-path:
  path.c: remove home_config_paths()
  git-config: replace use of home_config_paths()
  git-commit: replace use of home_config_paths()
  credential-store.c: replace home_config_paths() with xdg_config_home()
  dir.c: replace home_config_paths() with xdg_config_home()
  attr.c: replace home_config_paths() with xdg_config_home()
  path.c: implement xdg_config_home()
  t0302: "unreadable" test needs POSIXPERM
  t0302: test credential-store support for XDG_CONFIG_HOME
  git-credential-store: support XDG_CONFIG_HOME
  git-credential-store: support multiple credential files
2015-06-05 12:00:04 -07:00
Junio C Hamano
c99fec6e35 Sync with 2.3.8
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-05-11 14:39:28 -07:00
Junio C Hamano
1add9aed85 Merge branch 'oh/fix-config-default-user-name-section' into maint-2.3
The default $HOME/.gitconfig file created upon "git config --global"
that edits it had incorrectly spelled user.name and user.email
entries in it.

* oh/fix-config-default-user-name-section:
  config: fix settings in default_user_config template
2015-05-11 14:33:59 -07:00
Junio C Hamano
558e5a8c40 Merge branch 'pt/xdg-config-path'
Code clean-up for xdg configuration path support.

* pt/xdg-config-path:
  path.c: remove home_config_paths()
  git-config: replace use of home_config_paths()
  git-commit: replace use of home_config_paths()
  credential-store.c: replace home_config_paths() with xdg_config_home()
  dir.c: replace home_config_paths() with xdg_config_home()
  attr.c: replace home_config_paths() with xdg_config_home()
  path.c: implement xdg_config_home()
2015-05-11 14:24:01 -07:00
Junio C Hamano
a0c0c2e5c2 Merge branch 'jn/clean-use-error-not-fprintf-on-stderr'
Some error messages in "git config" were emitted without calling
the usual error() facility.

* jn/clean-use-error-not-fprintf-on-stderr:
  config: use error() instead of fprintf(stderr, ...)
2015-05-11 14:23:53 -07:00
Paul Tan
509adc3352 git-config: replace use of home_config_paths()
Since home_config_paths() combines distinct functionality already
implemented by expand_user_path() and xdg_config_home(), and hides the
home config file path ~/.gitconfig. Make the code more explicit by
replacing the use of home_config_paths() with expand_user_path() and
xdg_config_home().

Signed-off-by: Paul Tan <pyokagan@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-05-06 11:33:48 -07:00
Junio C Hamano
67e5a00d0a Merge branch 'oh/fix-config-default-user-name-section'
The default $HOME/.gitconfig file created upon "git config --global"
that edits it had incorrectly spelled user.name and user.email
entries in it.

* oh/fix-config-default-user-name-section:
  config: fix settings in default_user_config template
2015-05-05 21:00:31 -07:00
Jonathan Nieder
95d621217a config: use error() instead of fprintf(stderr, ...)
The die() / error() / warning() helpers put a fatal: / error: /
warning: prefix in front of the error message they print describing
the message's severity, which users are likely to be accustomed to
seeing these days.

This change will also be useful when marking the message for
translation: the argument to error() includes no newline at the end,
so it is less fussy for translators to translate without lines running
together in the translated output.

While we're here, start the error messages with a lowercase letter to
match the usual typography of error messages.

A quick web search and a code search at codesearch.debian.net finds no
scripts trying to parse these error messages, so this change should be
safe.

Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-05-04 14:38:15 -07:00
Ossi Herrala
7e11052442 config: fix settings in default_user_config template
The name (not user) and email setting should be in config section
"user" and not in "core" as documented in Documentation/config.txt.

Signed-off-by: Ossi Herrala <oherrala@gmail.com>
Reviewed-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-04-17 10:32:46 -07:00
Alex Henrie
9c9b4f2f8b standardize usage info string format
This patch puts the usage info strings that were not already in docopt-
like format into docopt-like format, which will be a litle easier for
end users and a lot easier for translators. Changes include:

- Placing angle brackets around fill-in-the-blank parameters
- Putting dashes in multiword parameter names
- Adding spaces to [-f|--foobar] to make [-f | --foobar]
- Replacing <foobar>* with [<foobar>...]

Signed-off-by: Alex Henrie <alexhenrie24@gmail.com>
Reviewed-by: Matthieu Moy <Matthieu.Moy@imag.fr>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-01-14 09:32:04 -08:00
Junio C Hamano
e886efdb34 Merge branch 'jk/colors-fix'
* jk/colors-fix:
  t4026: test "normal" color
  config: fix parsing of "git config --get-color some.key -1"
  docs: describe ANSI 256-color mode
2014-12-12 14:31:39 -08:00
Jeff King
d0e08d6233 config: fix parsing of "git config --get-color some.key -1"
Most of git-config's command line options use OPT_BIT to
choose an action, and then parse the non-option arguments
in a context-dependent way. However, --get-color and
--get-colorbool are unlike the rest of the options, in that
they are OPT_STRING, taking the option name as a parameter.

This generally works, because we then use the presence of
those strings to set an action bit anyway. But it does mean
that the option-parser will continue looking for options
even after the key (because it is not a non-option; it is an
argument to an option). And running:

  git config --get-color some.key -1

(to use "-1" as the default color spec) will barf, claiming
that "-1" is not an option. Instead, we should treat
--get-color and --get-colorbool as action bits, just like
--add, --get, and all the other actions, and then check that
the non-option arguments we got are sane. This fixes the
weirdness above, and makes those two options like all the
others.

This "fixes" a test in t4026, which checked that feeding
"-2" as a color should fail (it does fail, but prior to this
patch, because parseopt barfed, not because we actually ever
tried to parse the color).

This also catches other errors, like:

  git config --get-color some.key black blue

which previously silently ignored "blue" (and now will
complain that you gave too many arguments).

There are some possible regressions, though. We now disallow
these, which currently do what you would expect:

  # specifying other options after the action
  git config --get-color some.key --file whatever

  # using long-arg syntax
  git config --get-color=some.key

However, we have never advertised these in the
documentation, and in fact they did not work in some older
versions of git. The behavior was apparently switched as an
accidental side effect of d64ec16 (git config: reorganize to
use parseopt, 2009-02-21).

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-11-20 10:52:23 -08:00
Michael Haggerty
3696a7c2d9 cmd_config(): make a copy of path obtained from git_path()
The strings returned by git_path() are recycled after a while.  Make
a copy of the config filename rather than holding onto the return
value from git_path().

Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-11-17 09:24:35 -08:00
Junio C Hamano
b946576839 Merge branch 'jn/parse-config-slot'
Code cleanup.

* jn/parse-config-slot:
  color_parse: do not mention variable name in error message
  pass config slots as pointers instead of offsets
2014-10-20 12:23:48 -07:00