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-rw-r--r--Documentation/diff-options.txt82
1 files changed, 66 insertions, 16 deletions
diff --git a/Documentation/diff-options.txt b/Documentation/diff-options.txt
index c32105f1ed..c7ed946357 100644
--- a/Documentation/diff-options.txt
+++ b/Documentation/diff-options.txt
@@ -66,19 +66,49 @@ endif::git-format-patch[]
number of modified files, as well as number of added and deleted
lines.
---dirstat[=<limit>]::
- Output the distribution of relative amount of changes (number of lines added or
- removed) for each sub-directory. Directories with changes below
- a cut-off percent (3% by default) are not shown. The cut-off percent
- can be set with `--dirstat=<limit>`. Changes in a child directory are not
- counted for the parent directory, unless `--cumulative` is used.
+--dirstat[=<param1,param2,...>]::
+ Output the distribution of relative amount of changes for each
+ sub-directory. The behavior of `--dirstat` can be customized by
+ passing it a comma separated list of parameters.
+ The defaults are controlled by the `diff.dirstat` configuration
+ variable (see linkgit:git-config[1]).
+ The following parameters are available:
+
-Note that the `--dirstat` option computes the changes while ignoring
-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.
-
---dirstat-by-file[=<limit>]::
- Same as `--dirstat`, but counts changed files instead of lines.
+--
+`changes`;;
+ 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.
+`lines`;;
+ 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.
+`files`;;
+ 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.
+`cumulative`;;
+ 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.
+<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.
+--
++
+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:
+`--dirstat=files,10,cumulative`.
--summary::
Output a condensed summary of extended header information
@@ -124,12 +154,19 @@ any of those replacements occurred.
--color[=<when>]::
Show colored diff.
- The value must be always (the default), never, or auto.
+ The value must be `always` (the default for `<when>`), `never`, or `auto`.
+ The default value is `never`.
+ifdef::git-diff[]
+ It can be changed by the `color.ui` and `color.diff`
+ configuration settings.
+endif::git-diff[]
--no-color::
- Turn off colored diff, even when the configuration file
- gives the default to color output.
- Same as `--color=never`.
+ Turn off colored diff.
+ifdef::git-diff[]
+ This can be used to override configuration settings.
+endif::git-diff[]
+ It is the same as `--color=never`.
--word-diff[=<mode>]::
Show a word diff, using the <mode> to delimit changed words.
@@ -263,6 +300,19 @@ endif::git-log[]
projects, so use it with caution. Giving more than one
`-C` option has the same effect.
+-D::
+--irreversible-delete::
+ Omit the preimage for deletes, i.e. print only the header but not
+ the diff between the preimage and `/dev/null`. The resulting patch
+ is not meant to be applied with `patch` nor `git apply`; this is
+ solely for people who want to just concentrate on reviewing the
+ text after the change. In addition, the output obviously lack
+ enough information to apply such a patch in reverse, even manually,
+ hence the name of the option.
++
+When used together with `-B`, omit also the preimage in the deletion part
+of a delete/create pair.
+
-l<num>::
The `-M` and `-C` options require O(n^2) processing time where n
is the number of potential rename/copy targets. This