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doc: git diff reformatting #1769

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fd3ee13
doc: git-diff: apply new documentation guidelines
jnavila Jun 24, 2024
a0a3986
doc: git-diff: apply format changes to diff-options
jnavila Jun 24, 2024
aca3573
doc: git-diff: apply format changes to diff-format
jnavila Aug 4, 2024
0e6162d
doc: git-diff: apply format changes to diff-generate-patch
jnavila Aug 4, 2024
d350237
doc: git-diff: apply format changes to config part
jnavila Aug 4, 2024
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204 changes: 111 additions & 93 deletions Documentation/config/diff.txt
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Original file line number Diff line number Diff line change
@@ -1,18 +1,25 @@
diff.autoRefreshIndex::
When using 'git diff' to compare with work tree
`diff.autoRefreshIndex`::
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On the Git mailing list, Johannes Sixt wrote (reply to this):

Am 11.11.24 um 17:53 schrieb Jean-Noël Avila via GitGitGadget:
> @@ -1,18 +1,18 @@
> -diff.autoRefreshIndex::
> -	When using 'git diff' to compare with work tree
> +`diff.autoRefreshIndex`::
> +	When using `git diff` to compare with work tree
>  	files, do not consider stat-only changes as changed.
>  	Instead, silently run `git update-index --refresh` to
>  	update the cached stat information for paths whose
>  	contents in the work tree match the contents in the
>  	index.  This option defaults to true.  Note that this
> -	affects only 'git diff' Porcelain, and not lower level
> -	'diff' commands such as 'git diff-files'.
> +	affects only `git diff` Porcelain, and not lower level
> +	`diff` commands such as '`git diff-files`.

A stray ' remained on this line.

> -diff.srcPrefix::
> -	If set, 'git diff' uses this source prefix. Defaults to "a/".
> +`diff.srcPrefix`::
> +	If set, `git diff` uses this source prefix. Defaults to "a/".
>  
> -diff.dstPrefix::
> -	If set, 'git diff' uses this destination prefix. Defaults to "b/".
> +`diff.dstPrefix`::
> +	If set, `git diff` uses this destination prefix. Defaults to "b/".

You are applying `backticks` to possible values such as `true` and
`false` later. Then these `a/` and `b/` should also be set in this way.

-- Hannes

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On the Git mailing list, Jean-Noël Avila wrote (reply to this):

Le 12/11/2024 à 19:51, Johannes Sixt a écrit :
> Am 11.11.24 um 17:53 schrieb Jean-Noël Avila via GitGitGadget:
>> @@ -1,18 +1,18 @@
>> -diff.autoRefreshIndex::
>> -	When using 'git diff' to compare with work tree
>> +`diff.autoRefreshIndex`::
>> +	When using `git diff` to compare with work tree
>>  	files, do not consider stat-only changes as changed.
>>  	Instead, silently run `git update-index --refresh` to
>>  	update the cached stat information for paths whose
>>  	contents in the work tree match the contents in the
>>  	index.  This option defaults to true.  Note that this
>> -	affects only 'git diff' Porcelain, and not lower level
>> -	'diff' commands such as 'git diff-files'.
>> +	affects only `git diff` Porcelain, and not lower level
>> +	`diff` commands such as '`git diff-files`.
> 
> A stray ' remained on this line.
> 
>> -diff.srcPrefix::
>> -	If set, 'git diff' uses this source prefix. Defaults to "a/".
>> +`diff.srcPrefix`::
>> +	If set, `git diff` uses this source prefix. Defaults to "a/".
>>  
>> -diff.dstPrefix::
>> -	If set, 'git diff' uses this destination prefix. Defaults to "b/".
>> +`diff.dstPrefix`::
>> +	If set, `git diff` uses this destination prefix. Defaults to "b/".
> 
> You are applying `backticks` to possible values such as `true` and
> `false` later. Then these `a/` and `b/` should also be set in this way.
> 
> -- Hannes
> 

Thank you for your review. Will fix.

When using `git diff` to compare with work tree
files, do not consider stat-only changes as changed.
Instead, silently run `git update-index --refresh` to
update the cached stat information for paths whose
contents in the work tree match the contents in the
index. This option defaults to true. Note that this
affects only 'git diff' Porcelain, and not lower level
'diff' commands such as 'git diff-files'.
index. This option defaults to `true`. Note that this
affects only `git diff` Porcelain, and not lower level
`diff` commands such as `git diff-files`.

diff.dirstat::
`diff.dirstat`::
ifdef::git-diff[]
A comma separated list of `--dirstat` parameters specifying the
default behavior of the `--dirstat` option to `git diff` and friends.
endif::git-diff[]
ifndef::git-diff[]
A comma separated list of `--dirstat` parameters specifying the
default behavior of the `--dirstat` option to linkgit:git-diff[1]
and friends. The defaults can be overridden on the command line
(using `--dirstat=<param1,param2,...>`). The fallback defaults
and friends.
endif::git-diff[]
The defaults can be overridden on the command line
(using `--dirstat=<param>,...`). The fallback defaults
(when not changed by `diff.dirstat`) are `changes,noncumulative,3`.
The following parameters are available:
+
Expand Down Expand Up @@ -41,7 +48,7 @@ diff.dirstat::
Note that when using `cumulative`, the sum of the percentages
reported may exceed 100%. The default (non-cumulative) behavior can
be specified with the `noncumulative` parameter.
<limit>;;
_<limit>_;;
An integer parameter specifies a cut-off percent (3% by default).
Directories contributing less than this percentage of the changes
are not shown in the output.
Expand All @@ -52,58 +59,58 @@ directories with less than 10% of the total amount of changed files,
and accumulating child directory counts in the parent directories:
`files,10,cumulative`.

diff.statNameWidth::
Limit the width of the filename part in --stat output. If set, applies
to all commands generating --stat output except format-patch.
`diff.statNameWidth`::
Limit the width of the filename part in `--stat` output. If set, applies
to all commands generating `--stat` output except `format-patch`.

diff.statGraphWidth::
Limit the width of the graph part in --stat output. If set, applies
to all commands generating --stat output except format-patch.
`diff.statGraphWidth`::
Limit the width of the graph part in `--stat` output. If set, applies
to all commands generating `--stat` output except `format-patch`.

diff.context::
Generate diffs with <n> lines of context instead of the default
of 3. This value is overridden by the -U option.
`diff.context`::
Generate diffs with _<n>_ lines of context instead of the default
of 3. This value is overridden by the `-U` option.

diff.interHunkContext::
`diff.interHunkContext`::
Show the context between diff hunks, up to the specified number
of lines, thereby fusing the hunks that are close to each other.
This value serves as the default for the `--inter-hunk-context`
command line option.

diff.external::
`diff.external`::
If this config variable is set, diff generation is not
performed using the internal diff machinery, but using the
given command. Can be overridden with the `GIT_EXTERNAL_DIFF'
given command. Can be overridden with the `GIT_EXTERNAL_DIFF`
environment variable. The command is called with parameters
as described under "git Diffs" in linkgit:git[1]. Note: if
you want to use an external diff program only on a subset of
your files, you might want to use linkgit:gitattributes[5] instead.

diff.trustExitCode::
If this boolean value is set to true then the
`diff.trustExitCode`::
If this boolean value is set to `true` then the
`diff.external` command is expected to return exit code
0 if it considers the input files to be equal or 1 if it
considers them to be different, like `diff(1)`.
If it is set to false, which is the default, then the command
is expected to return exit code 0 regardless of equality.
considers them to be different, like `diff`(1).
If it is set to `false`, which is the default, then the command
is expected to return exit code `0` regardless of equality.
Any other exit code causes Git to report a fatal error.

diff.ignoreSubmodules::
Sets the default value of --ignore-submodules. Note that this
affects only 'git diff' Porcelain, and not lower level 'diff'
commands such as 'git diff-files'. 'git checkout'
and 'git switch' also honor
`diff.ignoreSubmodules`::
Sets the default value of `--ignore-submodules`. Note that this
affects only `git diff` Porcelain, and not lower level `diff`
commands such as `git diff-files`. `git checkout`
and `git switch` also honor
this setting when reporting uncommitted changes. Setting it to
'all' disables the submodule summary normally shown by 'git commit'
and 'git status' when `status.submoduleSummary` is set unless it is
overridden by using the --ignore-submodules command-line option.
The 'git submodule' commands are not affected by this setting.
`all` disables the submodule summary normally shown by `git commit`
and `git status` when `status.submoduleSummary` is set unless it is
overridden by using the `--ignore-submodules` command-line option.
The `git submodule` commands are not affected by this setting.
By default this is set to untracked so that any untracked
submodules are ignored.

diff.mnemonicPrefix::
If set, 'git diff' uses a prefix pair that is different from the
standard "a/" and "b/" depending on what is being compared. When
`diff.mnemonicPrefix`::
If set, `git diff` uses a prefix pair that is different from the
standard `a/` and `b/` depending on what is being compared. When
this configuration is in effect, reverse diff output also swaps
the order of the prefixes:
`git diff`;;
Expand All @@ -112,111 +119,117 @@ diff.mnemonicPrefix::
compares a (c)ommit and the (w)ork tree;
`git diff --cached`;;
compares a (c)ommit and the (i)ndex;
`git diff HEAD:file1 file2`;;
`git diff HEAD:<file1> <file2>`;;
compares an (o)bject and a (w)ork tree entity;
`git diff --no-index a b`;;
compares two non-git things (1) and (2).
`git diff --no-index <a> <b>`;;
compares two non-git things _<a>_ and _<b>_.

diff.noPrefix::
If set, 'git diff' does not show any source or destination prefix.
`diff.noPrefix`::
If set, `git diff` does not show any source or destination prefix.

diff.srcPrefix::
If set, 'git diff' uses this source prefix. Defaults to "a/".
`diff.srcPrefix`::
If set, `git diff` uses this source prefix. Defaults to `a/`.

diff.dstPrefix::
If set, 'git diff' uses this destination prefix. Defaults to "b/".
`diff.dstPrefix`::
If set, `git diff` uses this destination prefix. Defaults to `b/`.

diff.relative::
If set to 'true', 'git diff' does not show changes outside of the directory
`diff.relative`::
If set to `true`, `git diff` does not show changes outside of the directory
and show pathnames relative to the current directory.

diff.orderFile::
`diff.orderFile`::
File indicating how to order files within a diff.
See the '-O' option to linkgit:git-diff[1] for details.
ifdef::git-diff[]
See the `-O` option for details.
endif::git-diff[]
ifndef::git-diff[]
See the `-O` option to linkgit:git-diff[1] for details.
endif::git-diff[]
If `diff.orderFile` is a relative pathname, it is treated as
relative to the top of the working tree.

diff.renameLimit::
`diff.renameLimit`::
The number of files to consider in the exhaustive portion of
copy/rename detection; equivalent to the 'git diff' option
copy/rename detection; equivalent to the `git diff` option
`-l`. If not set, the default value is currently 1000. This
setting has no effect if rename detection is turned off.

diff.renames::
Whether and how Git detects renames. If set to "false",
rename detection is disabled. If set to "true", basic rename
detection is enabled. If set to "copies" or "copy", Git will
detect copies, as well. Defaults to true. Note that this
affects only 'git diff' Porcelain like linkgit:git-diff[1] and
`diff.renames`::
Whether and how Git detects renames. If set to `false`,
rename detection is disabled. If set to `true`, basic rename
detection is enabled. If set to `copies` or `copy`, Git will
detect copies, as well. Defaults to `true`. Note that this
affects only `git diff` Porcelain like linkgit:git-diff[1] and
linkgit:git-log[1], and not lower level commands such as
linkgit:git-diff-files[1].

diff.suppressBlankEmpty::
`diff.suppressBlankEmpty`::
A boolean to inhibit the standard behavior of printing a space
before each empty output line. Defaults to false.
before each empty output line. Defaults to `false`.

diff.submodule::
`diff.submodule`::
Specify the format in which differences in submodules are
shown. The "short" format just shows the names of the commits
at the beginning and end of the range. The "log" format lists
shown. The `short` format just shows the names of the commits
at the beginning and end of the range. The `log` format lists
the commits in the range like linkgit:git-submodule[1] `summary`
does. The "diff" format shows an inline diff of the changed
contents of the submodule. Defaults to "short".
does. The `diff` format shows an inline diff of the changed
contents of the submodule. Defaults to `short`.

diff.wordRegex::
`diff.wordRegex`::
A POSIX Extended Regular Expression used to determine what is a "word"
when performing word-by-word difference calculations. Character
sequences that match the regular expression are "words", all other
characters are *ignorable* whitespace.

diff.<driver>.command::
`diff.<driver>.command`::
The custom diff driver command. See linkgit:gitattributes[5]
for details.

diff.<driver>.trustExitCode::
If this boolean value is set to true then the
`diff.<driver>.trustExitCode`::
If this boolean value is set to `true` then the
`diff.<driver>.command` command is expected to return exit code
0 if it considers the input files to be equal or 1 if it
considers them to be different, like `diff(1)`.
If it is set to false, which is the default, then the command
considers them to be different, like `diff`(1).
If it is set to `false`, which is the default, then the command
is expected to return exit code 0 regardless of equality.
Any other exit code causes Git to report a fatal error.

diff.<driver>.xfuncname::
`diff.<driver>.xfuncname`::
The regular expression that the diff driver should use to
recognize the hunk header. A built-in pattern may also be used.
See linkgit:gitattributes[5] for details.

diff.<driver>.binary::
Set this option to true to make the diff driver treat files as
`diff.<driver>.binary`::
Set this option to `true` to make the diff driver treat files as
binary. See linkgit:gitattributes[5] for details.

diff.<driver>.textconv::
`diff.<driver>.textconv`::
The command that the diff driver should call to generate the
text-converted version of a file. The result of the
conversion is used to generate a human-readable diff. See
linkgit:gitattributes[5] for details.

diff.<driver>.wordRegex::
`diff.<driver>.wordRegex`::
The regular expression that the diff driver should use to
split words in a line. See linkgit:gitattributes[5] for
details.

diff.<driver>.cachetextconv::
Set this option to true to make the diff driver cache the text
`diff.<driver>.cachetextconv`::
Set this option to `true` to make the diff driver cache the text
conversion outputs. See linkgit:gitattributes[5] for details.

include::../mergetools-diff.txt[]

diff.indentHeuristic::
`diff.indentHeuristic`::
Set this option to `false` to disable the default heuristics
that shift diff hunk boundaries to make patches easier to read.

diff.algorithm::
`diff.algorithm`::
Choose a diff algorithm. The variants are as follows:
+
--
`default`, `myers`;;
`default`;;
`myers`;;
The basic greedy diff algorithm. Currently, this is the default.
`minimal`;;
Spend extra time to make sure the smallest possible diff is
Expand All @@ -229,7 +242,7 @@ diff.algorithm::
--
+

diff.wsErrorHighlight::
`diff.wsErrorHighlight`::
Highlight whitespace errors in the `context`, `old` or `new`
lines of the diff. Multiple values are separated by comma,
`none` resets previous values, `default` reset the list to
Expand All @@ -238,14 +251,19 @@ diff.wsErrorHighlight::
The command line option `--ws-error-highlight=<kind>`
overrides this setting.

diff.colorMoved::
If set to either a valid `<mode>` or a true value, moved lines
in a diff are colored differently, for details of valid modes
see '--color-moved' in linkgit:git-diff[1]. If simply set to
true the default color mode will be used. When set to false,
moved lines are not colored.

diff.colorMovedWS::
`diff.colorMoved`::
If set to either a valid _<mode>_ or a `true` value, moved lines
in a diff are colored differently.
ifdef::git-diff[]
For details of valid modes see `--color-moved`.
endif::git-diff[]
ifndef::git-diff[]
For details of valid modes see `--color-moved` in linkgit:git-diff[1].
endif::git-diff[]
If simply set to `true` the default color mode will be used. When
set to `false`, moved lines are not colored.

`diff.colorMovedWS`::
When moved lines are colored using e.g. the `diff.colorMoved` setting,
this option controls the `<mode>` how spaces are treated.
For details of valid modes see '--color-moved-ws' in linkgit:git-diff[1].
this option controls the mode how spaces are treated.
For details of valid modes see `--color-moved-ws` in linkgit:git-diff[1].
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