English ▾ Topics ▾ Version 2.4.12 ▾ diff-config last updated in 2.19.6

When using git diff to compare with work tree files, do not consider stat-only change 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.


A comma separated list of --dirstat parameters specifying the default behavior of the --dirstat option to git-diff[1]` and friends. The defaults can be overridden on the command line (using --dirstat=<param1,param2,...>). The fallback defaults (when not changed by diff.dirstat) are changes,noncumulative,3. The following parameters are available:


Compute the dirstat numbers by counting the lines that have been removed from the source, or added to the destination. This ignores the amount of pure code movements within a file. In other words, rearranging lines in a file is not counted as much as other changes. This is the default behavior when no parameter is given.


Compute the dirstat numbers by doing the regular line-based diff analysis, and summing the removed/added line counts. (For binary files, count 64-byte chunks instead, since binary files have no natural concept of lines). This is a more expensive --dirstat behavior than the changes behavior, but it does count rearranged lines within a file as much as other changes. The resulting output is consistent with what you get from the other --*stat options.


Compute the dirstat numbers by counting the number of files changed. Each changed file counts equally in the dirstat analysis. This is the computationally cheapest --dirstat behavior, since it does not have to look at the file contents at all.


Count changes in a child directory for the parent directory as well. 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.


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.

Example: The following will count changed files, while ignoring directories with less than 10% of the total amount of changed files, and accumulating child directory counts in the parent directories: files,10,cumulative.


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


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


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’ environment variable. The command is called with parameters as described under "git Diffs" in git[1]. Note: if you want to use an external diff program only on a subset of your files, you might want to use gitattributes[5] instead.


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 also honors 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.


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

compares the (i)ndex and the (w)ork tree;

git diff HEAD

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

compares an (o)bject and a (w)ork tree entity;

git diff --no-index a b

compares two non-git things (1) and (2).


If set, git diff does not show any source or destination prefix.


File indicating how to order files within a diff, using one shell glob pattern per line. Can be overridden by the -O option to git-diff[1].


The number of files to consider when performing the copy/rename detection; equivalent to the git diff option -l.


Tells Git to detect renames. If set to any boolean value, it will enable basic rename detection. If set to "copies" or "copy", it will detect copies, as well.


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


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


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.


The custom diff driver command. See gitattributes[5] for details.


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


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


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 gitattributes[5] for details.


The regular expression that the diff driver should use to split words in a line. See gitattributes[5] for details.


Set this option to true to make the diff driver cache the text conversion outputs. See gitattributes[5] for details.


Controls which diff tool is used by git-difftool[1]. This variable overrides the value configured in merge.tool. The list below shows the valid built-in values. Any other value is treated as a custom diff tool and requires that a corresponding difftool.<tool>.cmd variable is defined.

  • araxis

  • bc

  • bc3

  • codecompare

  • deltawalker

  • diffmerge

  • diffuse

  • ecmerge

  • emerge

  • gvimdiff

  • gvimdiff2

  • gvimdiff3

  • kdiff3

  • kompare

  • meld

  • opendiff

  • p4merge

  • tkdiff

  • vimdiff

  • vimdiff2

  • vimdiff3

  • xxdiff


Choose a diff algorithm. The variants are as follows:

default, myers

The basic greedy diff algorithm. Currently, this is the default.


Spend extra time to make sure the smallest possible diff is produced.


Use "patience diff" algorithm when generating patches.


This algorithm extends the patience algorithm to "support low-occurrence common elements".