Limit the size of the new delta_base_cache
[git/git.git] / Documentation / config.txt
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1CONFIGURATION FILE
2------------------
3
4The git configuration file contains a number of variables that affect
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5the git command's behavior. `.git/config` file for each repository
6is used to store the information for that repository, and
7`$HOME/.gitconfig` is used to store per user information to give
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8fallback values for `.git/config` file. The file `/etc/gitconfig`
9can be used to store system-wide defaults.
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10
11They can be used by both the git plumbing
b8936cf0 12and the porcelains. The variables are divided into sections, where
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13in the fully qualified variable name the variable itself is the last
14dot-separated segment and the section name is everything before the last
15dot. The variable names are case-insensitive and only alphanumeric
16characters are allowed. Some variables may appear multiple times.
17
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18Syntax
19~~~~~~
20
1ab661dd 21The syntax is fairly flexible and permissive; whitespaces are mostly
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22ignored. The '#' and ';' characters begin comments to the end of line,
23blank lines are ignored.
24
25The file consists of sections and variables. A section begins with
26the name of the section in square brackets and continues until the next
27section begins. Section names are not case sensitive. Only alphanumeric
28characters, '`-`' and '`.`' are allowed in section names. Each variable
29must belong to some section, which means that there must be section
30header before first setting of a variable.
31
32Sections can be further divided into subsections. To begin a subsection
33put its name in double quotes, separated by space from the section name,
34in the section header, like in example below:
35
36--------
37 [section "subsection"]
38
39--------
40
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41Subsection names can contain any characters except newline (doublequote
42'`"`' and backslash have to be escaped as '`\"`' and '`\\`',
3dff5379 43respectively) and are case sensitive. Section header cannot span multiple
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44lines. Variables may belong directly to a section or to a given subsection.
45You can have `[section]` if you have `[section "subsection"]`, but you
46don't need to.
47
48There is also (case insensitive) alternative `[section.subsection]` syntax.
49In this syntax subsection names follow the same restrictions as for section
50name.
51
52All the other lines are recognized as setting variables, in the form
53'name = value'. If there is no equal sign on the line, the entire line
54is taken as 'name' and the variable is recognized as boolean "true".
55The variable names are case-insensitive and only alphanumeric
56characters and '`-`' are allowed. There can be more than one value
57for a given variable; we say then that variable is multivalued.
58
59Leading and trailing whitespace in a variable value is discarded.
60Internal whitespace within a variable value is retained verbatim.
61
62The values following the equals sign in variable assign are all either
63a string, an integer, or a boolean. Boolean values may be given as yes/no,
640/1 or true/false. Case is not significant in boolean values, when
65converting value to the canonical form using '--bool' type specifier;
e0d10e1c 66`git-config` will ensure that the output is "true" or "false".
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67
68String values may be entirely or partially enclosed in double quotes.
69You need to enclose variable value in double quotes if you want to
70preserve leading or trailing whitespace, or if variable value contains
71beginning of comment characters (if it contains '#' or ';').
72Double quote '`"`' and backslash '`\`' characters in variable value must
73be escaped: use '`\"`' for '`"`' and '`\\`' for '`\`'.
74
75The following escape sequences (beside '`\"`' and '`\\`') are recognized:
76'`\n`' for newline character (NL), '`\t`' for horizontal tabulation (HT, TAB)
77and '`\b`' for backspace (BS). No other char escape sequence, nor octal
78char sequences are valid.
79
80Variable value ending in a '`\`' is continued on the next line in the
81customary UNIX fashion.
82
83Some variables may require special value format.
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84
85Example
86~~~~~~~
87
88 # Core variables
89 [core]
90 ; Don't trust file modes
91 filemode = false
92
93 # Our diff algorithm
94 [diff]
95 external = "/usr/local/bin/gnu-diff -u"
96 renames = true
97
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98 [branch "devel"]
99 remote = origin
100 merge = refs/heads/devel
101
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102 # Proxy settings
103 [core]
104 gitProxy="ssh" for "ssh://kernel.org/"
105 gitProxy=default-proxy ; for the rest
910c00c8 106
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107Variables
108~~~~~~~~~
109
110Note that this list is non-comprehensive and not necessarily complete.
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111For command-specific variables, you will find a more detailed description
112in the appropriate manual page. You will find a description of non-core
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113porcelain configuration variables in the respective porcelain documentation.
114
115core.fileMode::
116 If false, the executable bit differences between the index and
117 the working copy are ignored; useful on broken filesystems like FAT.
118 See gitlink:git-update-index[1]. True by default.
119
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120core.symlinks::
121 If false, symbolic links are checked out as small plain files that
122 contain the link text. gitlink:git-update-index[1] and
123 gitlink:git-add[1] will not change the recorded type to regular
124 file. Useful on filesystems like FAT that do not support
125 symbolic links. True by default.
126
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127core.gitProxy::
128 A "proxy command" to execute (as 'command host port') instead
129 of establishing direct connection to the remote server when
130 using the git protocol for fetching. If the variable value is
131 in the "COMMAND for DOMAIN" format, the command is applied only
132 on hostnames ending with the specified domain string. This variable
133 may be set multiple times and is matched in the given order;
134 the first match wins.
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135+
136Can be overridden by the 'GIT_PROXY_COMMAND' environment variable
137(which always applies universally, without the special "for"
138handling).
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139
140core.ignoreStat::
141 The working copy files are assumed to stay unchanged until you
142 mark them otherwise manually - Git will not detect the file changes
143 by lstat() calls. This is useful on systems where those are very
144 slow, such as Microsoft Windows. See gitlink:git-update-index[1].
145 False by default.
146
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147core.preferSymlinkRefs::
148 Instead of the default "symref" format for HEAD
149 and other symbolic reference files, use symbolic links.
150 This is sometimes needed to work with old scripts that
151 expect HEAD to be a symbolic link.
1ab661dd 152
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153core.bare::
154 If true this repository is assumed to be 'bare' and has no
155 working directory associated with it. If this is the case a
156 number of commands that require a working directory will be
157 disabled, such as gitlink:git-add[1] or gitlink:git-merge[1].
158+
159This setting is automatically guessed by gitlink:git-clone[1] or
160gitlink:git-init[1] when the repository was created. By default a
161repository that ends in "/.git" is assumed to be not bare (bare =
162false), while all other repositories are assumed to be bare (bare
163= true).
164
6de08ae6 165core.logAllRefUpdates::
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166 Updates to a ref <ref> is logged to the file
167 "$GIT_DIR/logs/<ref>", by appending the new and old
168 SHA1, the date/time and the reason of the update, but
169 only when the file exists. If this configuration
170 variable is set to true, missing "$GIT_DIR/logs/<ref>"
171 file is automatically created for branch heads.
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172+
173This information can be used to determine what commit
174was the tip of a branch "2 days ago".
175+
176This value is true by default in a repository that has
177a working directory associated with it, and false by
178default in a bare repository.
6de08ae6 179
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180core.repositoryFormatVersion::
181 Internal variable identifying the repository format and layout
182 version.
183
184core.sharedRepository::
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185 When 'group' (or 'true'), the repository is made shareable between
186 several users in a group (making sure all the files and objects are
187 group-writable). When 'all' (or 'world' or 'everybody'), the
188 repository will be readable by all users, additionally to being
189 group-shareable. When 'umask' (or 'false'), git will use permissions
5c94f87e 190 reported by umask(2). See gitlink:git-init[1]. False by default.
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191
192core.warnAmbiguousRefs::
193 If true, git will warn you if the ref name you passed it is ambiguous
194 and might match multiple refs in the .git/refs/ tree. True by default.
195
3d3e95af 196core.compression::
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197 An integer -1..9, indicating the compression level for objects that
198 are not in a pack file. -1 is the zlib and git default. 0 means no
199 compression, and 1..9 are various speed/size tradeoffs, 9 being
200 slowest.
201
93821bd9 202core.legacyheaders::
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203 A boolean which
204 changes the format of loose objects so that they are more
205 efficient to pack and to send out of the repository over git
206 native protocol, since v1.4.2. However, loose objects
207 written in the new format cannot be read by git older than
208 that version; people fetching from your repository using
209 older versions of git over dumb transports (e.g. http)
210 will also be affected.
211+
212To let git use the new loose object format, you have to
213set core.legacyheaders to false.
93821bd9 214
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215core.packedGitWindowSize::
216 Number of bytes of a pack file to map into memory in a
217 single mapping operation. Larger window sizes may allow
218 your system to process a smaller number of large pack files
219 more quickly. Smaller window sizes will negatively affect
eb92242f 220 performance due to increased calls to the operating system's
60bb8b14 221 memory manager, but may improve performance when accessing
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222 a large number of large pack files.
223+
224Default is 1 MiB if NO_MMAP was set at compile time, otherwise 32
225MiB on 32 bit platforms and 1 GiB on 64 bit platforms. This should
226be reasonable for all users/operating systems. You probably do
227not need to adjust this value.
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228+
229Common unit suffixes of 'k', 'm', or 'g' are supported.
60bb8b14 230
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231core.packedGitLimit::
232 Maximum number of bytes to map simultaneously into memory
233 from pack files. If Git needs to access more than this many
234 bytes at once to complete an operation it will unmap existing
235 regions to reclaim virtual address space within the process.
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236+
237Default is 256 MiB on 32 bit platforms and 8 GiB on 64 bit platforms.
238This should be reasonable for all users/operating systems, except on
239the largest projects. You probably do not need to adjust this value.
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240+
241Common unit suffixes of 'k', 'm', or 'g' are supported.
77ccc5bb 242
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243core.deltaBaseCacheLimit::
244 Maximum number of bytes to reserve for caching base objects
245 that multiple deltafied objects reference. By storing the
246 entire decompressed base objects in a cache Git is able
247 to avoid unpacking and decompressing frequently used base
248 objects multiple times.
249+
250Default is 16 MiB on all platforms. This should be reasonable
251for all users/operating systems, except on the largest projects.
252You probably do not need to adjust this value.
253+
254Common unit suffixes of 'k', 'm', or 'g' are supported.
255
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256alias.*::
257 Command aliases for the gitlink:git[1] command wrapper - e.g.
258 after defining "alias.last = cat-file commit HEAD", the invocation
259 "git last" is equivalent to "git cat-file commit HEAD". To avoid
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260 confusion and troubles with script usage, aliases that
261 hide existing git commands are ignored. Arguments are split by
262 spaces, the usual shell quoting and escaping is supported.
263 quote pair and a backslash can be used to quote them.
4514ad4f 264
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265 If the alias expansion is prefixed with an exclamation point,
266 it will be treated as a shell command. For example, defining
267 "alias.new = !gitk --all --not ORIG_HEAD", the invocation
268 "git new" is equivalent to running the shell command
269 "gitk --all --not ORIG_HEAD".
270
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271apply.whitespace::
272 Tells `git-apply` how to handle whitespaces, in the same way
273 as the '--whitespace' option. See gitlink:git-apply[1].
274
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275branch.<name>.remote::
276 When in branch <name>, it tells `git fetch` which remote to fetch.
62b339a5 277 If this option is not given, `git fetch` defaults to remote "origin".
648ad18f 278
5372806a 279branch.<name>.merge::
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280 When in branch <name>, it tells `git fetch` the default refspec to
281 be marked for merging in FETCH_HEAD. The value has exactly to match
282 a remote part of one of the refspecs which are fetched from the remote
283 given by "branch.<name>.remote".
284 The merge information is used by `git pull` (which at first calls
285 `git fetch`) to lookup the default branch for merging. Without
286 this option, `git pull` defaults to merge the first refspec fetched.
287 Specify multiple values to get an octopus merge.
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288 If you wish to setup `git pull` so that it merges into <name> from
289 another branch in the local repository, you can point
290 branch.<name>.merge to the desired branch, and use the special setting
291 `.` (a period) for branch.<name>.remote.
5372806a 292
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293color.branch::
294 A boolean to enable/disable color in the output of
295 gitlink:git-branch[1]. May be set to `true` (or `always`),
296 `false` (or `never`) or `auto`, in which case colors are used
297 only when the output is to a terminal. Defaults to false.
298
299color.branch.<slot>::
300 Use customized color for branch coloration. `<slot>` is one of
301 `current` (the current branch), `local` (a local branch),
302 `remote` (a tracking branch in refs/remotes/), `plain` (other
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303 refs).
304+
305The value for these configuration variables is a list of colors (at most
306two) and attributes (at most one), separated by spaces. The colors
307accepted are `normal`, `black`, `red`, `green`, `yellow`, `blue`,
308`magenta`, `cyan` and `white`; the attributes are `bold`, `dim`, `ul`,
309`blink` and `reverse`. The first color given is the foreground; the
310second is the background. The position of the attribute, if any,
311doesn't matter.
f3673988 312
a159ca0c 313color.diff::
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314 When true (or `always`), always use colors in patch.
315 When false (or `never`), never. When set to `auto`, use
316 colors only when the output is to the terminal.
317
a159ca0c 318color.diff.<slot>::
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319 Use customized color for diff colorization. `<slot>` specifies
320 which part of the patch to use the specified color, and is one
321 of `plain` (context text), `meta` (metainformation), `frag`
322 (hunk header), `old` (removed lines), `new` (added lines),
323 `commit` (commit headers), or `whitespace` (highlighting dubious
324 whitespace). The values of these variables may be specified as
325 in color.branch.<slot>.
b5376648 326
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327color.pager::
328 A boolean to enable/disable colored output when the pager is in
329 use (default is true).
330
331color.status::
332 A boolean to enable/disable color in the output of
333 gitlink:git-status[1]. May be set to `true` (or `always`),
334 `false` (or `never`) or `auto`, in which case colors are used
335 only when the output is to a terminal. Defaults to false.
336
337color.status.<slot>::
338 Use customized color for status colorization. `<slot>` is
339 one of `header` (the header text of the status message),
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340 `added` or `updated` (files which are added but not committed),
341 `changed` (files which are changed but not added in the index),
1d77043b 342 or `untracked` (files which are not tracked by git). The values of
f3673988 343 these variables may be specified as in color.branch.<slot>.
1d77043b 344
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345diff.renameLimit::
346 The number of files to consider when performing the copy/rename
347 detection; equivalent to the git diff option '-l'.
348
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349diff.renames::
350 Tells git to detect renames. If set to any boolean value, it
351 will enable basic rename detection. If set to "copies" or
352 "copy", it will detect copies, as well.
353
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354fetch.unpackLimit::
355 If the number of objects fetched over the git native
356 transfer is below this
357 limit, then the objects will be unpacked into loose object
358 files. However if the number of received objects equals or
359 exceeds this limit then the received pack will be stored as
360 a pack, after adding any missing delta bases. Storing the
361 pack from a push can make the push operation complete faster,
362 especially on slow filesystems.
363
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364format.headers::
365 Additional email headers to include in a patch to be submitted
366 by mail. See gitlink:git-format-patch[1].
367
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368format.suffix::
369 The default for format-patch is to output files with the suffix
370 `.patch`. Use this variable to change that suffix (make sure to
371 include the dot if you want it).
1ab661dd 372
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373gc.packrefs::
374 `git gc` does not run `git pack-refs` in a bare repository by
375 default so that older dumb-transport clients can still fetch
376 from the repository. Setting this to `true` lets `git
377 gc` to run `git pack-refs`. Setting this to `false` tells
378 `git gc` never to run `git pack-refs`. The default setting is
379 `notbare`. Enable it only when you know you do not have to
380 support such clients. The default setting will change to `true`
381 at some stage, and setting this to `false` will continue to
382 prevent `git pack-refs` from being run from `git gc`.
383
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384gc.reflogexpire::
385 `git reflog expire` removes reflog entries older than
386 this time; defaults to 90 days.
387
388gc.reflogexpireunreachable::
389 `git reflog expire` removes reflog entries older than
390 this time and are not reachable from the current tip;
391 defaults to 30 days.
392
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393gc.rerereresolved::
394 Records of conflicted merge you resolved earlier are
395 kept for this many days when `git rerere gc` is run.
396 The default is 60 days. See gitlink:git-rerere[1].
397
398gc.rerereunresolved::
399 Records of conflicted merge you have not resolved are
400 kept for this many days when `git rerere gc` is run.
401 The default is 15 days. See gitlink:git-rerere[1].
402
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403gitcvs.enabled::
404 Whether the cvs pserver interface is enabled for this repository.
405 See gitlink:git-cvsserver[1].
406
407gitcvs.logfile::
408 Path to a log file where the cvs pserver interface well... logs
409 various stuff. See gitlink:git-cvsserver[1].
410
411http.sslVerify::
412 Whether to verify the SSL certificate when fetching or pushing
37425065 413 over HTTPS. Can be overridden by the 'GIT_SSL_NO_VERIFY' environment
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414 variable.
415
416http.sslCert::
417 File containing the SSL certificate when fetching or pushing
37425065 418 over HTTPS. Can be overridden by the 'GIT_SSL_CERT' environment
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419 variable.
420
421http.sslKey::
422 File containing the SSL private key when fetching or pushing
abda1ef5 423 over HTTPS. Can be overridden by the 'GIT_SSL_KEY' environment
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424 variable.
425
426http.sslCAInfo::
427 File containing the certificates to verify the peer with when
abda1ef5 428 fetching or pushing over HTTPS. Can be overridden by the
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429 'GIT_SSL_CAINFO' environment variable.
430
431http.sslCAPath::
432 Path containing files with the CA certificates to verify the peer
37425065 433 with when fetching or pushing over HTTPS. Can be overridden
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434 by the 'GIT_SSL_CAPATH' environment variable.
435
436http.maxRequests::
abda1ef5 437 How many HTTP requests to launch in parallel. Can be overridden
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438 by the 'GIT_HTTP_MAX_REQUESTS' environment variable. Default is 5.
439
440http.lowSpeedLimit, http.lowSpeedTime::
441 If the HTTP transfer speed is less than 'http.lowSpeedLimit'
442 for longer than 'http.lowSpeedTime' seconds, the transfer is aborted.
abda1ef5 443 Can be overridden by the 'GIT_HTTP_LOW_SPEED_LIMIT' and
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444 'GIT_HTTP_LOW_SPEED_TIME' environment variables.
445
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446http.noEPSV::
447 A boolean which disables using of EPSV ftp command by curl.
448 This can helpful with some "poor" ftp servers which doesn't
449 support EPSV mode. Can be overridden by the 'GIT_CURL_FTP_NO_EPSV'
450 environment variable. Default is false (curl will use EPSV).
451
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452i18n.commitEncoding::
453 Character encoding the commit messages are stored in; git itself
454 does not care per se, but this information is necessary e.g. when
455 importing commits from emails or in the gitk graphical history
456 browser (and possibly at other places in the future or in other
457 porcelains). See e.g. gitlink:git-mailinfo[1]. Defaults to 'utf-8'.
458
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459i18n.logOutputEncoding::
460 Character encoding the commit messages are converted to when
461 running `git-log` and friends.
462
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463log.showroot::
464 If true, the initial commit will be shown as a big creation event.
465 This is equivalent to a diff against an empty tree.
466 Tools like gitlink:git-log[1] or gitlink:git-whatchanged[1], which
467 normally hide the root commit will now show it. True by default.
468
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469merge.summary::
470 Whether to include summaries of merged commits in newly created
471 merge commit messages. False by default.
472
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473merge.tool::
474 Controls which merge resolution program is used by
475 gitlink:git-mergetool[l]. Valid values are: "kdiff3", "tkdiff",
9cec6539 476 "meld", "xxdiff", "emerge", "vimdiff"
c4b4a5af 477
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478merge.verbosity::
479 Controls the amount of output shown by the recursive merge
480 strategy. Level 0 outputs nothing except a final error
481 message if conflicts were detected. Level 1 outputs only
482 conflicts, 2 outputs conflicts and file changes. Level 5 and
483 above outputs debugging information. The default is level 2.
484
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485pack.window::
486 The size of the window used by gitlink:git-pack-objects[1] when no
487 window size is given on the command line. Defaults to 10.
488
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489pull.octopus::
490 The default merge strategy to use when pulling multiple branches
491 at once.
492
493pull.twohead::
494 The default merge strategy to use when pulling a single branch.
495
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496remote.<name>.url::
497 The URL of a remote repository. See gitlink:git-fetch[1] or
498 gitlink:git-push[1].
499
500remote.<name>.fetch::
501 The default set of "refspec" for gitlink:git-fetch[1]. See
502 gitlink:git-fetch[1].
503
504remote.<name>.push::
505 The default set of "refspec" for gitlink:git-push[1]. See
506 gitlink:git-push[1].
507
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508remote.<name>.skipDefaultUpdate::
509 If true, this remote will be skipped by default when updating
510 using the remote subcommand of gitlink:git-remote[1].
511
060aafc1 512remote.<name>.receivepack::
5dee29ac 513 The default program to execute on the remote side when pushing. See
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514 option \--exec of gitlink:git-push[1].
515
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516remote.<name>.uploadpack::
517 The default program to execute on the remote side when fetching. See
518 option \--exec of gitlink:git-fetch-pack[1].
519
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520remote.<name>.tagopt::
521 Setting this value to --no-tags disables automatic tag following when fetching
522 from remote <name>
523
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524remotes.<group>::
525 The list of remotes which are fetched by "git remote update
526 <group>". See gitlink:git-remote[1].
527
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528repack.usedeltabaseoffset::
529 Allow gitlink:git-repack[1] to create packs that uses
530 delta-base offset. Defaults to false.
531
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532show.difftree::
533 The default gitlink:git-diff-tree[1] arguments to be used
534 for gitlink:git-show[1].
535
536showbranch.default::
537 The default set of branches for gitlink:git-show-branch[1].
538 See gitlink:git-show-branch[1].
539
ce1a79b6 540tar.umask::
7fe08af4 541 By default, gitlink:git-tar-tree[1] sets file and directories modes
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542 to 0666 or 0777. While this is both useful and acceptable for projects
543 such as the Linux Kernel, it might be excessive for other projects.
544 With this variable, it becomes possible to tell
7fe08af4 545 gitlink:git-tar-tree[1] to apply a specific umask to the modes above.
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546 The special value "user" indicates that the user's current umask will
547 be used. This should be enough for most projects, as it will lead to
7fe08af4 548 the same permissions as gitlink:git-checkout[1] would use. The default
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549 value remains 0, which means world read-write.
550
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551user.email::
552 Your email address to be recorded in any newly created commits.
abda1ef5 553 Can be overridden by the 'GIT_AUTHOR_EMAIL' and 'GIT_COMMITTER_EMAIL'
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554 environment variables. See gitlink:git-commit-tree[1].
555
556user.name::
557 Your full name to be recorded in any newly created commits.
abda1ef5 558 Can be overridden by the 'GIT_AUTHOR_NAME' and 'GIT_COMMITTER_NAME'
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559 environment variables. See gitlink:git-commit-tree[1].
560
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561user.signingkey::
562 If gitlink:git-tag[1] is not selecting the key you want it to
563 automatically when creating a signed tag, you can override the
564 default selection with this variable. This option is passed
565 unchanged to gpg's --local-user parameter, so you may specify a key
566 using any method that gpg supports.
567
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568whatchanged.difftree::
569 The default gitlink:git-diff-tree[1] arguments to be used
570 for gitlink:git-whatchanged[1].
571
572imap::
573 The configuration variables in the 'imap' section are described
574 in gitlink:git-imap-send[1].
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576receive.unpackLimit::
577 If the number of objects received in a push is below this
578 limit then the objects will be unpacked into loose object
579 files. However if the number of received objects equals or
580 exceeds this limit then the received pack will be stored as
581 a pack, after adding any missing delta bases. Storing the
582 pack from a push can make the push operation complete faster,
583 especially on slow filesystems.
584
585receive.denyNonFastForwards::
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586 If set to true, git-receive-pack will deny a ref update which is
587 not a fast forward. Use this to prevent such an update via a push,
588 even if that push is forced. This configuration variable is
589 set when initializing a shared repository.
590
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591transfer.unpackLimit::
592 When `fetch.unpackLimit` or `receive.unpackLimit` are
593 not set, the value of this variable is used instead.
594
595