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git/Documentation/git-config.txt
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

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git-config(1)
=============
NAME
----
git-config - Get and set repository or global options
SYNOPSIS
--------
[verse]
'git config' [<file-option>] [--type=<type>] [--show-origin] [-z|--null] name [value [value_regex]]
'git config' [<file-option>] [--type=<type>] --add name value
'git config' [<file-option>] [--type=<type>] --replace-all name value [value_regex]
'git config' [<file-option>] [--type=<type>] [--show-origin] [-z|--null] --get name [value_regex]
'git config' [<file-option>] [--type=<type>] [--show-origin] [-z|--null] --get-all name [value_regex]
'git config' [<file-option>] [--type=<type>] [--show-origin] [-z|--null] [--name-only] --get-regexp name_regex [value_regex]
'git config' [<file-option>] [--type=<type>] [-z|--null] --get-urlmatch name URL
'git config' [<file-option>] --unset name [value_regex]
'git config' [<file-option>] --unset-all name [value_regex]
'git config' [<file-option>] --rename-section old_name new_name
'git config' [<file-option>] --remove-section name
'git config' [<file-option>] [--show-origin] [-z|--null] [--name-only] -l | --list
'git config' [<file-option>] --get-color name [default]
'git config' [<file-option>] --get-colorbool name [stdout-is-tty]
'git config' [<file-option>] -e | --edit
DESCRIPTION
-----------
You can query/set/replace/unset options with this command. The name is
actually the section and the key separated by a dot, and the value will be
escaped.
Multiple lines can be added to an option by using the `--add` option.
If you want to update or unset an option which can occur on multiple
lines, a POSIX regexp `value_regex` needs to be given. Only the
existing values that match the regexp are updated or unset. If
you want to handle the lines that do *not* match the regex, just
prepend a single exclamation mark in front (see also <<EXAMPLES>>).
The `--type=<type>` option instructs 'git config' to ensure that incoming and
outgoing values are canonicalize-able under the given <type>. If no
`--type=<type>` is given, no canonicalization will be performed. Callers may
unset an existing `--type` specifier with `--no-type`.
When reading, the values are read from the system, global and
repository local configuration files by default, and options
`--system`, `--global`, `--local`, `--worktree` and
`--file <filename>` can be used to tell the command to read from only
that location (see <<FILES>>).
When writing, the new value is written to the repository local
configuration file by default, and options `--system`, `--global`,
`--worktree`, `--file <filename>` can be used to tell the command to
write to that location (you can say `--local` but that is the
default).
This command will fail with non-zero status upon error. Some exit
codes are:
- The section or key is invalid (ret=1),
- no section or name was provided (ret=2),
- the config file is invalid (ret=3),
- the config file cannot be written (ret=4),
- you try to unset an option which does not exist (ret=5),
- you try to unset/set an option for which multiple lines match (ret=5), or
- you try to use an invalid regexp (ret=6).
On success, the command returns the exit code 0.
OPTIONS
-------
--replace-all::
Default behavior is to replace at most one line. This replaces
all lines matching the key (and optionally the value_regex).
--add::
Adds a new line to the option without altering any existing
values. This is the same as providing '^$' as the value_regex
in `--replace-all`.
--get::
Get the value for a given key (optionally filtered by a regex
matching the value). Returns error code 1 if the key was not
found and the last value if multiple key values were found.
--get-all::
Like get, but returns all values for a multi-valued key.
--get-regexp::
Like --get-all, but interprets the name as a regular expression and
writes out the key names. Regular expression matching is currently
case-sensitive and done against a canonicalized version of the key
in which section and variable names are lowercased, but subsection
names are not.
--get-urlmatch name URL::
When given a two-part name section.key, the value for
section.<url>.key whose <url> part matches the best to the
given URL is returned (if no such key exists, the value for
section.key is used as a fallback). When given just the
section as name, do so for all the keys in the section and
list them. Returns error code 1 if no value is found.
--global::
For writing options: write to global `~/.gitconfig` file
rather than the repository `.git/config`, write to
`$XDG_CONFIG_HOME/git/config` file if this file exists and the
`~/.gitconfig` file doesn't.
+
For reading options: read only from global `~/.gitconfig` and from
`$XDG_CONFIG_HOME/git/config` rather than from all available files.
+
See also <<FILES>>.
--system::
For writing options: write to system-wide
`$(prefix)/etc/gitconfig` rather than the repository
`.git/config`.
+
For reading options: read only from system-wide `$(prefix)/etc/gitconfig`
rather than from all available files.
+
See also <<FILES>>.
--local::
For writing options: write to the repository `.git/config` file.
This is the default behavior.
+
For reading options: read only from the repository `.git/config` rather than
from all available files.
+
See also <<FILES>>.
--worktree::
Similar to `--local` except that `.git/config.worktree` is
read from or written to if `extensions.worktreeConfig` is
present. If not it's the same as `--local`.
-f config-file::
--file config-file::
Use the given config file instead of the one specified by GIT_CONFIG.
--blob blob::
Similar to `--file` but use the given blob instead of a file. E.g.
you can use 'master:.gitmodules' to read values from the file
'.gitmodules' in the master branch. See "SPECIFYING REVISIONS"
section in linkgit:gitrevisions[7] for a more complete list of
ways to spell blob names.
--remove-section::
Remove the given section from the configuration file.
--rename-section::
Rename the given section to a new name.
--unset::
Remove the line matching the key from config file.
--unset-all::
Remove all lines matching the key from config file.
-l::
--list::
List all variables set in config file, along with their values.
--type <type>::
'git config' will ensure that any input or output is valid under the given
type constraint(s), and will canonicalize outgoing values in `<type>`'s
canonical form.
+
Valid `<type>`'s include:
+
- 'bool': canonicalize values as either "true" or "false".
- 'int': canonicalize values as simple decimal numbers. An optional suffix of
'k', 'm', or 'g' will cause the value to be multiplied by 1024, 1048576, or
1073741824 upon input.
- 'bool-or-int': canonicalize according to either 'bool' or 'int', as described
above.
- 'path': canonicalize by adding a leading `~` to the value of `$HOME` and
`~user` to the home directory for the specified user. This specifier has no
effect when setting the value (but you can use `git config section.variable
~/` from the command line to let your shell do the expansion.)
- 'expiry-date': canonicalize by converting from a fixed or relative date-string
to a timestamp. This specifier has no effect when setting the value.
- 'color': When getting a value, canonicalize by converting to an ANSI color
escape sequence. When setting a value, a sanity-check is performed to ensure
that the given value is canonicalize-able as an ANSI color, but it is written
as-is.
+
--bool::
--int::
--bool-or-int::
--path::
--expiry-date::
Historical options for selecting a type specifier. Prefer instead `--type`
(see above).
--no-type::
Un-sets the previously set type specifier (if one was previously set). This
option requests that 'git config' not canonicalize the retrieved variable.
`--no-type` has no effect without `--type=<type>` or `--<type>`.
-z::
--null::
For all options that output values and/or keys, always
end values with the null character (instead of a
newline). Use newline instead as a delimiter between
key and value. This allows for secure parsing of the
output without getting confused e.g. by values that
contain line breaks.
--name-only::
Output only the names of config variables for `--list` or
`--get-regexp`.
--show-origin::
Augment the output of all queried config options with the
origin type (file, standard input, blob, command line) and
the actual origin (config file path, ref, or blob id if
applicable).
--get-colorbool name [stdout-is-tty]::
Find the color setting for `name` (e.g. `color.diff`) and output
"true" or "false". `stdout-is-tty` should be either "true" or
"false", and is taken into account when configuration says
"auto". If `stdout-is-tty` is missing, then checks the standard
output of the command itself, and exits with status 0 if color
is to be used, or exits with status 1 otherwise.
When the color setting for `name` is undefined, the command uses
`color.ui` as fallback.
--get-color name [default]::
Find the color configured for `name` (e.g. `color.diff.new`) and
output it as the ANSI color escape sequence to the standard
output. The optional `default` parameter is used instead, if
there is no color configured for `name`.
+
`--type=color [--default=<default>]` is preferred over `--get-color`.
-e::
--edit::
Opens an editor to modify the specified config file; either
`--system`, `--global`, or repository (default).
--[no-]includes::
Respect `include.*` directives in config files when looking up
values. Defaults to `off` when a specific file is given (e.g.,
using `--file`, `--global`, etc) and `on` when searching all
config files.
--default <value>::
When using `--get`, and the requested variable is not found, behave as if
<value> were the value assigned to the that variable.
CONFIGURATION
-------------
`pager.config` is only respected when listing configuration, i.e., when
using `--list` or any of the `--get-*` which may return multiple results.
The default is to use a pager.
[[FILES]]
FILES
-----
If not set explicitly with `--file`, there are four files where
'git config' will search for configuration options:
$(prefix)/etc/gitconfig::
System-wide configuration file.
$XDG_CONFIG_HOME/git/config::
Second user-specific configuration file. If $XDG_CONFIG_HOME is not set
or empty, `$HOME/.config/git/config` will be used. Any single-valued
variable set in this file will be overwritten by whatever is in
`~/.gitconfig`. It is a good idea not to create this file if
you sometimes use older versions of Git, as support for this
file was added fairly recently.
~/.gitconfig::
User-specific configuration file. Also called "global"
configuration file.
$GIT_DIR/config::
Repository specific configuration file.
$GIT_DIR/config.worktree::
This is optional and is only searched when
`extensions.worktreeConfig` is present in $GIT_DIR/config.
If no further options are given, all reading options will read all of these
files that are available. If the global or the system-wide configuration
file are not available they will be ignored. If the repository configuration
file is not available or readable, 'git config' will exit with a non-zero
error code. However, in neither case will an error message be issued.
The files are read in the order given above, with last value found taking
precedence over values read earlier. When multiple values are taken then all
values of a key from all files will be used.
You may override individual configuration parameters when running any git
command by using the `-c` option. See linkgit:git[1] for details.
All writing options will per default write to the repository specific
configuration file. Note that this also affects options like `--replace-all`
and `--unset`. *'git config' will only ever change one file at a time*.
You can override these rules either by command-line options or by environment
variables. The `--global`, `--system` and `--worktree` options will limit
the file used to the global, system-wide or per-worktree file respectively.
The `GIT_CONFIG` environment variable has a similar effect, but you
can specify any filename you want.
ENVIRONMENT
-----------
GIT_CONFIG::
Take the configuration from the given file instead of .git/config.
Using the "--global" option forces this to ~/.gitconfig. Using the
"--system" option forces this to $(prefix)/etc/gitconfig.
GIT_CONFIG_NOSYSTEM::
Whether to skip reading settings from the system-wide
$(prefix)/etc/gitconfig file. See linkgit:git[1] for details.
See also <<FILES>>.
[[EXAMPLES]]
EXAMPLES
--------
Given a .git/config like this:
#
# This is the config file, and
# a '#' or ';' character indicates
# a comment
#
; core variables
[core]
; Don't trust file modes
filemode = false
; Our diff algorithm
[diff]
external = /usr/local/bin/diff-wrapper
renames = true
; Proxy settings
[core]
gitproxy=proxy-command for kernel.org
gitproxy=default-proxy ; for all the rest
; HTTP
[http]
sslVerify
[http "https://weak.example.com"]
sslVerify = false
cookieFile = /tmp/cookie.txt
you can set the filemode to true with
------------
% git config core.filemode true
------------
The hypothetical proxy command entries actually have a postfix to discern
what URL they apply to. Here is how to change the entry for kernel.org
to "ssh".
------------
% git config core.gitproxy '"ssh" for kernel.org' 'for kernel.org$'
------------
This makes sure that only the key/value pair for kernel.org is replaced.
To delete the entry for renames, do
------------
% git config --unset diff.renames
------------
If you want to delete an entry for a multivar (like core.gitproxy above),
you have to provide a regex matching the value of exactly one line.
To query the value for a given key, do
------------
% git config --get core.filemode
------------
or
------------
% git config core.filemode
------------
or, to query a multivar:
------------
% git config --get core.gitproxy "for kernel.org$"
------------
If you want to know all the values for a multivar, do:
------------
% git config --get-all core.gitproxy
------------
If you like to live dangerously, you can replace *all* core.gitproxy by a
new one with
------------
% git config --replace-all core.gitproxy ssh
------------
However, if you really only want to replace the line for the default proxy,
i.e. the one without a "for ..." postfix, do something like this:
------------
% git config core.gitproxy ssh '! for '
------------
To actually match only values with an exclamation mark, you have to
------------
% git config section.key value '[!]'
------------
To add a new proxy, without altering any of the existing ones, use
------------
% git config --add core.gitproxy '"proxy-command" for example.com'
------------
An example to use customized color from the configuration in your
script:
------------
#!/bin/sh
WS=$(git config --get-color color.diff.whitespace "blue reverse")
RESET=$(git config --get-color "" "reset")
echo "${WS}your whitespace color or blue reverse${RESET}"
------------
For URLs in `https://weak.example.com`, `http.sslVerify` is set to
false, while it is set to `true` for all others:
------------
% git config --type=bool --get-urlmatch http.sslverify https://good.example.com
true
% git config --type=bool --get-urlmatch http.sslverify https://weak.example.com
false
% git config --get-urlmatch http https://weak.example.com
http.cookieFile /tmp/cookie.txt
http.sslverify false
------------
include::config.txt[]
BUGS
----
When using the deprecated `[section.subsection]` syntax, changing a value
will result in adding a multi-line key instead of a change, if the subsection
is given with at least one uppercase character. For example when the config
looks like
--------
[section.subsection]
key = value1
--------
and running `git config section.Subsection.key value2` will result in
--------
[section.subsection]
key = value1
key = value2
--------
GIT
---
Part of the linkgit:git[1] suite