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Author SHA1 Message Date
Junio C Hamano 31399a6b61 config: allow tweaking whitespace between value and comment
Extending the previous step, this allows the whitespace placed after
the value before the "# comment message" to be tweaked by tweaking
the preprocessing rule to:

 * If the given comment string begins with one or more whitespace
   characters followed by '#', it is passed intact.

 * If the given comment string begins with '#', a Space is
   prepended.

 * Otherwise, " # " (Space, '#', Space) is prefixed.

 * A string with LF in it cannot be used as a comment string.

Unlike the previous step, which unconditionally added a space after
the value before writing the "# comment string", because the above
preprocessing already gives a whitespace before the '#', the
resulting string is written immediately after copying the value.

And the sanity checking rule becomes

 * comment string after the above massaging that comes into
   git_config_set_multivar_in_file_gently() must

   - begin with zero or more whitespace characters followed by '#'.
   - not have a LF in it.

I personally think this is over-engineered, but since I thought
things through anyway, here it is in the patch form.  The logic to
tweak end-user supplied comment string is encapsulated in a new
helper function, git_config_prepare_comment_string(), so if new
front-end callers would want to use the same massaging rules, it is
easily reused.

Unfortunately I do not think of a way to tweak the preprocessing
rules further to optionally allow having no blank after the value,
i.e. to produce

	[section]
		variable = value#comment

(which is a valid way to say section.variable=value, by the way)
without sacrificing the ergonomics for the more usual case, so this
time I really stop here.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2024-03-15 16:07:39 -07:00
Junio C Hamano fbad334db9 config: fix --comment formatting
When git adds comments itself (like "rebase -i" todo list and
"commit -e" log message editor), it always gives a comment
introducer "#" followed by a Space before the message, except for
the recently introduced "git config --comment", where the users are
forced to say " this is my comment" if they want to add their
comment in this usual format; otherwise their comment string will
end up without a space after the "#".

Make it more ergonomic, while keeping it possible to also use this
unusual style, by massaging the comment string at the UI layer with
a set of simple rules:

 * If the given comment string begins with '#', it is passed intact.
 * Otherwise, "# " is prefixed.
 * A string with LF in it cannot be used as a comment string.

Right now there is only one "front-end" that accepts end-user
comment string and calls the underlying machinery to add or modify
configuration file with comments, but to make sure that the future
callers perform similar massaging as they see fit, add a sanity
check logic in git_config_set_multivar_in_file_gently(), which is
the single choke point in the codepaths that consumes the comment
string.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2024-03-15 16:07:37 -07:00
Ralph Seichter 42d5c03394 config: add --comment option to add a comment
Introduce the ability to append comments to modifications
made using git-config. Example usage:

  git config --comment "changed via script" \
    --add safe.directory /home/alice/repo.git

based on the proposed patch, the output produced is:

  [safe]
    directory = /home/alice/repo.git #changed via script

Users need to be able to distinguish between config entries made
using automation and entries made by a human. Automation can add
comments containing a URL pointing to explanations for the change
made, avoiding questions from users as to why their config file
was changed by a third party.

The implementation ensures that a # character is unconditionally
prepended to the provided comment string, and that the comment
text is appended as a suffix to the changed key-value-pair in the
same line of text. Multi-line comments (i.e. comments containing
linefeed) are rejected as errors, causing Git to exit without
making changes.

Comments are aimed at humans who inspect or change their Git
config using a pager or editor. Comments are not meant to be
read or displayed by git-config at a later time.

Signed-off-by: Ralph Seichter <github@seichter.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2024-03-15 12:25:35 -07:00
Jean-Noël Avila 51e846e673 doc: enforce placeholders in documentation
Any string that is not meant to be used verbatim in the documentation
should be marked as a placeholder.

Signed-off-by: Jean-Noël Avila <jn.avila@free.fr>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2023-12-26 11:06:57 -08:00
Evan Gates 58be11432e git-config: fix misworded --type=path explanation
When `--type=<type>` was added as a prefered alias for `--<type>` by
fb0dc3bac1 (builtin/config.c: support `--type=<type>` as preferred
alias for `--<type>`), the explanation for the path type was
reworded.  Whereas the previous explanation said "expand a leading
`~`" this was changed to "adding a leading `~`".  Change "adding" to
"expanding" to correctly explain the canonicalization.

Signed-off-by: Evan Gates <evan.gates@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2023-09-15 14:09:37 -07:00
Glen Choo 779ea9303a Documentation: define protected configuration
For security reasons, there are config variables that are only trusted
when they are specified in certain configuration scopes, which are
sometimes referred to on-list as 'protected configuration' [1]. A future
commit will introduce another such variable, so let's define our terms
so that we can have consistent documentation and implementation.

In our documentation, define 'protected configuration' as the system,
global and command config scopes. As a shorthand, I will refer to
variables that are only respected in protected configuration as
'protected configuration only', but this term is not used in the
documentation.

This definition of protected configuration is based on whether or not
Git can reasonably protect the user by ignoring the configuration scope:

- System, global and command line config are considered protected
  because an attacker who has control over any of those can do plenty of
  harm without Git, so we gain very little by ignoring those scopes.

- On the other hand, local (and similarly, worktree) config are not
  considered protected because it is relatively easy for an attacker to
  control local config, e.g.:

  - On some shared user environments, a non-admin attacker can create a
    repository high up the directory hierarchy (e.g. C:\.git on
    Windows), and a user may accidentally use it when their PS1
    automatically invokes "git" commands.

    `safe.directory` prevents attacks of this form by making sure that
    the user intended to use the shared repository. It obviously
    shouldn't be read from the repository, because that would end up
    trusting the repository that Git was supposed to reject.

  - "git upload-pack" is expected to run in repositories that may not be
    controlled by the user. We cannot ignore all config in that
    repository (because "git upload-pack" would fail), but we can limit
    the risks by ignoring `uploadpack.packObjectsHook`.

Only `uploadpack.packObjectsHook` is 'protected configuration only'. The
following variables are intentionally excluded:

- `safe.directory` should be 'protected configuration only', but it does
  not technically fit the definition because it is not respected in the
  "command" scope. A future commit will fix this.

- `trace2.*` happens to read the same scopes as `safe.directory` because
  they share an implementation. However, this is not for security
  reasons; it is because we want to start tracing so early that
  repository-level config and "-c" are not available [2].

  This requirement is unique to `trace2.*`, so it does not makes sense
  for protected configuration to be subject to the same constraints.

[1] For example,
https://lore.kernel.org/git/6af83767-576b-75c4-c778-0284344a8fe7@github.com/
[2] https://lore.kernel.org/git/a0c89d0d-669e-bf56-25d2-cbb09b012e70@jeffhostetler.com/

Signed-off-by: Glen Choo <chooglen@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2022-07-14 15:08:29 -07:00
Glen Choo 5f5af3735d Documentation/git-config.txt: add SCOPES section
In a subsequent commit, we will introduce "protected configuration",
which is easiest to describe in terms of configuration scopes (i.e. it's
the union of the 'system', 'global', and 'command' scopes). This
description is fine for ML discussions, but it's inadequate for end
users because we don't provide a good description of "configuration
scopes" in the public docs.

145d59f482 (config: add '--show-scope' to print the scope of a config
value, 2020-02-10) introduced the word "scope" to our public docs, but
that only enumerates the scopes and assumes the user can figure out
what those values mean.

Add a SCOPES section to Documentation/git-config.txt that describes the
configuration scopes, their corresponding CLI options, and mentions that
some configuration options are only respected in certain scopes. Then,
use the word "scope" to simplify the FILES section and change some
confusing wording.

Signed-off-by: Glen Choo <chooglen@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2022-07-14 15:08:29 -07:00
Glen Choo db7961e6a6 config: document and test the 'worktree' scope
Test that "git config --show-scope" shows the "worktree" scope, and add
it to the list of scopes in Documentation/git-config.txt.

"git config --help" does not need to be updated because it already
mentions "worktree".

Signed-off-by: Glen Choo <chooglen@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2022-06-07 18:14:25 -07:00
Derrick Stolee 5c11c0d52c Documentation: add extensions.worktreeConfig details
The extensions.worktreeConfig extension was added in 58b284a (worktree:
add per-worktree config files, 2018-10-21) and was somewhat documented
in Documentation/git-config.txt. However, the extensions.worktreeConfig
value was not specified further in the list of possible config keys. The
location of the config.worktree file is not specified, and there are
some precautions that should be mentioned clearly, but are only
mentioned in git-worktree.txt.

Expand the documentation to help users discover the complexities of
extensions.worktreeConfig by adding details and cross links in these
locations (relative to Documentation/):

- config/extensions.txt
- git-config.txt
- git-worktree.txt

The updates focus on items such as

* $GIT_DIR/config.worktree takes precedence over $GIT_COMMON_DIR/config.

* The core.worktree and core.bare=true settings are incorrect to have in
  the common config file when extensions.worktreeConfig is enabled.

* The sparse-checkout settings core.sparseCheckout[Cone] are recommended
  to be set in the worktree config.

As documented in 11664196ac ("Revert "check_repository_format_gently():
refuse extensions for old repositories"", 2020-07-15), this extension
must be considered regardless of the repository format version for
historical reasons.

A future change will update references to extensions.worktreeConfig
within git-sparse-checkout.txt, but a behavior change is needed before
making those updates.

Helped-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
Reviewed-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2022-02-08 09:49:20 -08:00
Jean-Noël Avila 49cbad0edd doc: express grammar placeholders between angle brackets
This discerns user inputs from verbatim options in the synopsis.

Signed-off-by: Jean-Noël Avila <jn.avila@free.fr>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-11-09 09:39:11 -08:00
Philip Oakley ae578de926 doc: config, tell readers of `git help --config`
The `git help` command gained the ability to list config variables in
3ac68a93fd (help: add --config to list all available config, 2018-05-26)
but failed to tell readers of the config documenation itself.

Provide that cross reference.

Signed-off-by: Philip Oakley <philipoakley@iee.email>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-09-13 14:51:07 -07:00
Jeff King 734283855f doc/git-config: simplify "override" advice for FILES section
At the end of the FILES section, we indicate that you can override the
regular lookup rules with --global, etc. But:

  - we're missing the --local option

  - we point to GIT_CONFIG instead of --file, but the latter has much
    better documentation

  - we're vague about how the overrides work; the actual option
    descriptions are much better here

So let's just mention the names and point people back to the OPTIONS
section. We could perhaps even delete this paragraph entirely, but the
presence of the names may give people reading FILES a clue about where
to look for more information.

Signed-off-by: Jeff King <peff@peff.net>
Reviewed-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-07-20 14:55:06 -07:00
Jeff King b3b186262f doc/git-config: clarify GIT_CONFIG environment variable
The scope and utility of the GIT_CONFIG variable was drastically reduced
by dc87183189 (Only use GIT_CONFIG in "git config", not other programs,
2008-06-30). But the documentation in git-config(1) predates that, which
makes it rather misleading.

These days it is really just another way to say "--file". So let's say
that, and explicitly make it clear that it does not impact other Git
commands (like GIT_CONFIG_SYSTEM, etc, would).

I also bumped it to the bottom of the list of variables, and warned
people off of using it. We don't have any plans for deprecation at this
point, but there's little point in encouraging people to use it by
putting it at the top of the list.

Signed-off-by: Jeff King <peff@peff.net>
Reviewed-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-07-20 14:55:06 -07:00
Jeff King 4bb9eb5f91 doc/git-config: explain --file instead of referring to GIT_CONFIG
The explanation for the --file option only refers to GIT_CONFIG. This
redirection to an environment variable is confusing, but doubly so
because the description of GIT_CONFIG is out of date.

Let's describe --file from scratch, detailing both the reading and
writing behavior as we do for other similar options like --system, etc.

Signed-off-by: Jeff King <peff@peff.net>
Reviewed-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-07-20 14:55:06 -07:00
Patrick Steinhardt 4179b4897f config: allow overriding of global and system configuration
In order to have git run in a fully controlled environment without any
misconfiguration, it may be desirable for users or scripts to override
global- and system-level configuration files. We already have a way of
doing this, which is to unset both HOME and XDG_CONFIG_HOME environment
variables and to set `GIT_CONFIG_NOGLOBAL=true`. This is quite kludgy,
and unsetting the first two variables likely has an impact on other
executables spawned by such a script.

The obvious way to fix this would be to introduce `GIT_CONFIG_NOGLOBAL`
as an equivalent to `GIT_CONFIG_NOSYSTEM`. But in the past, it has
turned out that this design is inflexible: we cannot test system-level
parsing of the git configuration in our test harness because there is no
way to change its location, so all tests run with `GIT_CONFIG_NOSYSTEM`
set.

Instead of doing the same mistake with `GIT_CONFIG_NOGLOBAL`, introduce
two new variables `GIT_CONFIG_GLOBAL` and `GIT_CONFIG_SYSTEM`:

    - If unset, git continues to use the usual locations.

    - If set to a specific path, we skip reading the normal
      configuration files and instead take the path. By setting the path
      to `/dev/null`, no configuration will be loaded for the respective
      level.

This implements the usecase where we want to execute code in a sanitized
environment without any potential misconfigurations via `/dev/null`, but
is more flexible and allows for more usecases than simply adding
`GIT_CONFIG_NOGLOBAL`.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-04-19 14:16:59 -07:00
Junio C Hamano 294e949fa2 Merge branch 'ps/config-env-pairs'
Introduce two new ways to feed configuration variable-value pairs
via environment variables, and tweak the way GIT_CONFIG_PARAMETERS
encodes variable/value pairs to make it more robust.

* ps/config-env-pairs:
  config: allow specifying config entries via envvar pairs
  environment: make `getenv_safe()` a public function
  config: store "git -c" variables using more robust format
  config: parse more robust format in GIT_CONFIG_PARAMETERS
  config: extract function to parse config pairs
  quote: make sq_dequote_step() a public function
  config: add new way to pass config via `--config-env`
  git: add `--super-prefix` to usage string
2021-01-25 14:19:19 -08:00
Patrick Steinhardt d8d77153ea config: allow specifying config entries via envvar pairs
While we currently have the `GIT_CONFIG_PARAMETERS` environment variable
which can be used to pass runtime configuration data to git processes,
it's an internal implementation detail and not supposed to be used by
end users.

Next to being for internal use only, this way of passing config entries
has a major downside: the config keys need to be parsed as they contain
both key and value in a single variable. As such, it is left to the user
to escape any potentially harmful characters in the value, which is
quite hard to do if values are controlled by a third party.

This commit thus adds a new way of adding config entries via the
environment which gets rid of this shortcoming. If the user passes the
`GIT_CONFIG_COUNT=$n` environment variable, Git will parse environment
variable pairs `GIT_CONFIG_KEY_$i` and `GIT_CONFIG_VALUE_$i` for each
`i` in `[0,n)`.

While the same can be achieved with `git -c <name>=<value>`, one may
wish to not do so for potentially sensitive information. E.g. if one
wants to set `http.extraHeader` to contain an authentication token,
doing so via `-c` would trivially leak those credentials via e.g. ps(1),
which typically also shows command arguments.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-01-15 13:03:45 -08:00
Junio C Hamano c902618795 config doc: value-pattern is not necessarily a regexp
The introductory part of the "git config --help" mentions the
optional value-pattern argument, but give no hint that it can be
something other than a regular expression (worse, it just says
"POSIX regexp", which usually means BRE but the regexp the command
takes is ERE).  Also, it needs to be documented that the '!' prefix
to negate the match, which is only mentioned in this part of the
document, works only with regexp and not with the --fixed-value.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-11-25 15:01:31 -08:00
Derrick Stolee fda43942d7 config: add --fixed-value option, un-implemented
The 'git config' builtin takes a 'value-pattern' parameter for several
actions. This can cause confusion when expecting exact value matches
instead of regex matches, especially when the input string contains
metacharacters. While callers can escape the patterns themselves, it
would be more friendly to allow an argument to disable the pattern
matching in favor of an exact string match.

Add a new '--fixed-value' option that does not currently change the
behavior. The implementation will be filled in by later changes for
each appropriate action. For now, check and test that --fixed-value
will abort the command when included with an incompatible action or
without a 'value-pattern' argument.

The name '--fixed-value' was chosen over something simpler like
'--fixed' because some commands allow regular expressions on the
key in addition to the value.

Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-11-25 14:43:48 -08:00
Derrick Stolee 247e2f822e config: replace 'value_regex' with 'value_pattern'
The 'value_regex' argument in the 'git config' builtin is poorly named,
especially related to an upcoming change that allows exact string
matches instead of ERE pattern matches.

Perform a mostly mechanical change of every instance of 'value_regex' to
'value_pattern' in the codebase. This is only critical for documentation
and error messages, but it is best to be consistent inside the codebase,
too.

For documentation, use 'value-pattern' which is better punctuation. This
affects Documentation/git-config.txt and the usage in builtin/config.c,
which was already mixed between 'value_regex' and 'value-regex'.

I gave some thought to leaving the value_regex variables inside config.c
that are regex_t pointers. However, it is probably best to keep the name
consistent with the rest of the variables.

This does not update the translations inside the po/ directory, as that
creates conflicts with ongoing work. The input strings should
automatically update through automation, and a few of the output strings
currently use "[value_regex]" directly.

Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-11-25 14:43:48 -08:00
Matthew Rogers 145d59f482 config: add '--show-scope' to print the scope of a config value
When a user queries config values with --show-origin, often it's
difficult to determine what the actual "scope" (local, global, etc.) of
a given value is based on just the origin file.

Teach 'git config' the '--show-scope' option to print the scope of all
displayed config values.  Note that we should never see anything of
"submodule" scope as that is only ever used by submodule-config.c when
parsing the '.gitmodules' file.

Signed-off-by: Matthew Rogers <mattr94@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-02-10 10:49:12 -08:00
Martin Ågren 1925fe0c8a Documentation: wrap config listings in "----"
The indented lines in these example config-file listings are indented
differently by AsciiDoc and Asciidoctor.

Fix this by marking the example config-files as code listings by
wrapping them in "----". Because this gives us some extra indentation,
we can remove the one that we have been carrying explicitly. That is,
drop the first tab of indentation on each line.

With AsciiDoc, this results in identical rendering before and after this
commit. Asciidoctor now renders this the same as AsciiDoc does.

git-config.txt pretty consistently uses twelve dashes rather than the
minimum four to spell "----". Let's stick to the file-local convention
there.

Signed-off-by: Martin Ågren <martin.agren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-09-09 11:05:51 -07:00
Junio C Hamano 6d281f70cc Merge branch 'ma/asciidoctor-fixes-more'
Documentation mark-up fixes.

* ma/asciidoctor-fixes-more:
  Documentation: turn middle-of-line tabs into spaces
  git-svn.txt: drop escaping '\' that ends up being rendered
  git.txt: remove empty line before list continuation
  config/fsck.txt: avoid starting line with dash
  config/diff.txt: drop spurious backtick
2019-04-16 19:28:04 +09:00
Jeff King cd8e7593b9 config: document --type=color output is a complete line
Even though the newer "--type=color" option to "git config" is meant
to be upward compatible with the traditional "--get-color" option,
unlike the latter, its output is not an incomplete line that lack
the LF at the end.  That makes it consistent with output of other
types like "git config --type=bool".

Document it, as it sometimes surprises unsuspecting users.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-03-07 12:48:35 +09:00
Martin Ågren 8d75a1d183 Documentation: turn middle-of-line tabs into spaces
These tabs happen to appear in columns where they don't stand out too
much, so the diff here is non-obvious. Some of these are rendered
differently by AsciiDoc and Asciidoctor (although the difference might
be invisible!), which is how I found a few of them. The remainder were
found using `git grep "[a-zA-Z.,)]$TAB[a-zA-Z]"`.

Signed-off-by: Martin Ågren <martin.agren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-03-07 09:25:32 +09:00
Nguyễn Thái Ngọc Duy 58b284a2e9 worktree: add per-worktree config files
A new repo extension is added, worktreeConfig. When it is present:

 - Repository config reading by default includes $GIT_DIR/config _and_
   $GIT_DIR/config.worktree. "config" file remains shared in multiple
   worktree setup.

 - The special treatment for core.bare and core.worktree, to stay
   effective only in main worktree, is gone. These config settings are
   supposed to be in config.worktree.

This extension is most useful in multiple worktree setup because you
now have an option to store per-worktree config (which is either
.git/config.worktree for main worktree, or
.git/worktrees/xx/config.worktree for linked ones).

This extension can be used in single worktree mode, even though it's
pretty much useless (but this can happen after you remove all linked
worktrees and move back to single worktree).

"git config" reads from both "config" and "config.worktree" by default
(i.e. without either --user, --file...) when this extension is
present. Default writes still go to "config", not "config.worktree". A
new option --worktree is added for that (*).

Since a new repo extension is introduced, existing git binaries should
refuse to access to the repo (both from main and linked worktrees). So
they will not misread the config file (i.e. skip the config.worktree
part). They may still accidentally write to the config file anyway if
they use with "git config --file <path>".

This design places a bet on the assumption that the majority of config
variables are shared so it is the default mode. A safer move would be
default writes go to per-worktree file, so that accidental changes are
isolated.

(*) "git config --worktree" points back to "config" file when this
    extension is not present and there is only one worktree so that it
    works in any both single and multiple worktree setups.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-10-22 13:17:04 +09:00
Martin Ågren 08caa95a27 git-config.txt: fix 'see: above' note
Rather than saying "(see: above)", drop the colon. Also drop the comma
before this note.

Signed-off-by: Martin Ågren <martin.agren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-09-20 12:00:16 -07:00
Martin Ågren ed3bb3dfc7 Doc: use `--type=bool` instead of `--bool`
After fb0dc3bac1 (builtin/config.c: support `--type=<type>` as preferred
alias for `--<type>`, 2018-04-18) we have a more modern way of spelling
`--bool`.

Update all instances except those that explicitly document the
"historical options" in git-config.txt. The other old-style
type-specifiers already seem to be gone except for in that list of
historical options.

Tweak the grammar a little in config.txt while we are there.

Signed-off-by: Martin Ågren <martin.agren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-09-20 11:52:40 -07:00
Junio C Hamano 2a2c18f1c3 Merge branch 'sb/config-write-fix'
Recent update to "git config" broke updating variable in a
subsection, which has been corrected.

* sb/config-write-fix:
  git-config: document accidental multi-line setting in deprecated syntax
  config: fix case sensitive subsection names on writing
  t1300: document current behavior of setting options
2018-08-20 12:41:32 -07:00
Stefan Beller bff7df7a87 git-config: document accidental multi-line setting in deprecated syntax
The bug was noticed when writing the previous patch; a fix for this bug
is not easy though: If we choose to ignore the case of the subsection
(and revert most of the code of the previous patch, just keeping
s/strncasecmp/strcmp/), then we'd introduce new sections using the
new syntax, such that

 --------
   [section.subsection]
     key = value1
 --------

  git config section.Subsection.key value2

would result in

 --------
   [section.subsection]
     key = value1
   [section.Subsection]
     key = value2
 --------

which is even more confusing. A proper fix would replace the first
occurrence of 'key'. As the syntax is deprecated, let's prefer to not
spend time on fixing the behavior and just document it instead.

Signed-off-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-08-08 13:26:48 -07:00
Taylor Blau 63e2a0f8e9 builtin/config: introduce `color` type specifier
As of this commit, the canonical way to retreive an ANSI-compatible
color escape sequence from a configuration file is with the
`--get-color` action.

This is to allow Git to "fall back" on a default value for the color
should the given section not exist in the specified configuration(s).

With the addition of `--default`, this is no longer needed since:

  $ git config --default red --type=color core.section

will be have exactly as:

  $ git config --get-color core.section red

For consistency, let's introduce `--type=color` and encourage its use
with `--default` together over `--get-color` alone.

Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-04-23 22:52:20 +09:00
Taylor Blau eeaa24b990 builtin/config: introduce `--default`
For some use cases, callers of the `git-config(1)` builtin would like to
fallback to default values when the variable asked for does not exist.
In addition, users would like to use existing type specifiers to ensure
that values are parsed correctly when they do exist in the
configuration.

For example, to fetch a value without a type specifier and fallback to
`$fallback`, the following is required:

  $ git config core.foo || echo "$fallback"

This is fine for most values, but can be tricky for difficult-to-express
`$fallback`'s, like ANSI color codes.

This motivates `--get-color`, which is a one-off exception to the normal
type specifier rules wherein a user specifies both the configuration
variable and an optional fallback. Both are formatted according to their
type specifier, which eases the burden on the user to ensure that values
are correctly formatted.

This commit (and those following it in this series) aim to eventually
replace `--get-color` with a consistent alternative. By introducing
`--default`, we allow the `--get-color` action to be promoted to a
`--type=color` type specifier, retaining the "fallback" behavior via the
`--default` flag introduced in this commit.

For example, we aim to replace:

  $ git config --get-color variable [default] [...]

with:

  $ git config --default default --type=color variable [...]

Values filled by `--default` behave exactly as if they were present in
the affected configuration file; they will be parsed by type specifiers
without the knowledge that they are not themselves present in the
configuration.

Specifically, this means that the following will work:

  $ git config --int --default 1M does.not.exist
  1048576

In subsequent commits, we will offer `--type=color`, which (in
conjunction with `--default`) will be sufficient to replace
`--get-color`.

Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-04-23 22:51:38 +09:00
Taylor Blau fb0dc3bac1 builtin/config.c: support `--type=<type>` as preferred alias for `--<type>`
`git config` has long allowed the ability for callers to provide a 'type
specifier', which instructs `git config` to (1) ensure that incoming
values can be interpreted as that type, and (2) that outgoing values are
canonicalized under that type.

In another series, we propose to extend this functionality with
`--type=color` and `--default` to replace `--get-color`.

However, we traditionally use `--color` to mean "colorize this output",
instead of "this value should be treated as a color".

Currently, `git config` does not support this kind of colorization, but
we should be careful to avoid squatting on this option too soon, so that
`git config` can support `--color` (in the traditional sense) in the
future, if that is desired.

In this patch, we support `--type=<int|bool|bool-or-int|...>` in
addition to `--int`, `--bool`, and etc. This allows the aforementioned
upcoming patch to support querying a color value with a default via
`--type=color --default=...`, without squandering `--color`.

We retain the historic behavior of complaining when multiple,
legacy-style `--<type>` flags are given, as well as extend this to
conflicting new-style `--type=<type>` flags. `--int --type=int` (and its
commutative pair) does not complain, but `--bool --type=int` (and its
commutative pair) does.

Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-04-19 11:49:19 +09:00
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
Nathan Payre 32fceba3fd config doc: clarify "git config --path" example
Change the word "bla" to "section.variable"; "bla" is a placeholder
for a variable name but it wasn't clear for everyone.

While we're here, also reformat this sample command line to use
monospace instead of italics, to better match the rest of the file.

Use a space instead of a dash in "git config", as is common in the
rest of Git's documentation.

Reported-by: Robert P. J. Day <rpjday@crashcourse.ca>
Signed-off-by: MOY Matthieu <matthieu.moy@univ-lyon1.fr>
Signed-off-by: Daniel Bensoussan <daniel.bensoussan--bohm@etu.univ-lyon1.fr>
Signed-off-by: Timothee Albertin <timothee.albertin@etu.univ-lyon1.fr>
Signed-off-by: Nathan Payre <nathan.payre@etu.univ-lyon1.fr>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-10-19 13:52:49 +09:00
Junio C Hamano a8998453be Merge branch 'dg/document-git-c-in-git-config-doc'
The "git -c var[=val] cmd" facility to append a configuration
variable definition at the end of the search order was described in
git(1) manual page, but not in git-config(1), which was more likely
place for people to look for when they ask "can I make a one-shot
override, and if so how?"

* dg/document-git-c-in-git-config-doc:
  doc: mention `git -c` in git-config(1)
2016-08-25 13:55:07 -07:00
David Glasser ae1f7094f7 doc: mention `git -c` in git-config(1)
Signed-off-by: David Glasser <glasser@davidglasser.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-08-23 10:55:58 -07:00
Matthieu Moy bb72e10a41 doc: typeset long options with argument as literal
We previously reformatted '--option' to `--option`. This patch reformats
'--option <arg>' to `--option <arg>`. Obtained with:

  perl -pi -e "s/'(--[a-z][a-z=<>-]* <[^>]*>)'/\`\$1\`/g" *.txt

Signed-off-by: Matthieu Moy <Matthieu.Moy@imag.fr>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-06-28 08:36:45 -07:00
Matthieu Moy bcf9626a71 doc: typeset long command-line options as literal
Similarly to the previous commit, use backquotes instead of
forward-quotes, for long options.

This was obtained with:

  perl -pi -e "s/'(--[a-z][a-z=<>-]*)'/\`\$1\`/g" *.txt

and manual tweak to remove false positive in ascii-art (o'--o'--o' to
describe rewritten history).

Signed-off-by: Matthieu Moy <Matthieu.Moy@imag.fr>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-06-28 08:36:45 -07:00
Tom Russello 47d81b5c7a doc: more consistency in environment variables format
Wrap with backticks (monospaced font) unwrapped or single-quotes wrapped
(italic type) environment variables which are followed by the word
"environment". It was obtained with:

perl -pi -e "s/\'?(\\\$?[0-9A-Z\_]+)\'?(?= environment ?)/\`\1\`/g" *.txt

One of the main purposes is to stick to the CodingGuidelines as possible so
that people writting new documentation by mimicking the existing are more likely
to have it right (even if they didn't read the CodingGuidelines).

Signed-off-by: Tom Russello <tom.russello@grenoble-inp.org>
Signed-off-by: Erwan Mathoniere <erwan.mathoniere@grenoble-inp.org>
Signed-off-by: Samuel Groot <samuel.groot@grenoble-inp.org>
Signed-off-by: Matthieu Moy <matthieu.moy@grenoble-inp.fr>
Reviewed-by: Matthieu Moy <Matthieu.Moy@imag.fr>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-06-08 12:04:37 -07:00
Stefan Beller 376eb604c2 config doc: improve exit code listing
The possible reasons for exiting are now ordered by the exit code value.
While at it, rewrite the `can not write to the config file` to
`the config file cannot be written` to be grammatically correct and a
proper sentence.

Signed-off-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-04-26 11:32:24 -07:00
Junio C Hamano 0759dfdd9c Merge branch 'jk/config-get-urlmatch' into maint
"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
2016-04-14 18:57:43 -07:00
John Keeping 24990b2feb Documentation/git-config: fix --get-all description
--get does not fail if a key is multi-valued, it returns the last value
as described in its documentation.  Clarify the description of --get-all
to avoid implying that --get does fail in this case.

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
John Keeping 94c5b0e8b9 Documentation/git-config: use bulleted list for exit codes
Using a numbered list is confusing because the exit codes are not listed
in order so the numbers at the start of each line do not match the exit
codes described by the following text.  Switch to a bulleted list so
that the only number appearing on each line is the exit code described.

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
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 dd0f567f10 Merge branch 'ls/config-origin'
The configuration system has been taught to phrase where it found a
bad configuration variable in a better way in its error messages.
"git config" learnt a new "--show-origin" option to indicate where
the values come from.

* ls/config-origin:
  config: add '--show-origin' option to print the origin of a config value
  config: add 'origin_type' to config_source struct
  rename git_config_from_buf to git_config_from_mem
  t: do not hide Git's exit code in tests using 'nul_to_q'
2016-02-26 13:37:17 -08:00
Junio C Hamano 895f20de9e Merge branch 'jk/config-include'
* jk/config-include:
  git-config: better document default behavior for `--include`
2016-02-22 13:14:48 -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