Add diff-option --ext-diff

[git.git] / Documentation / diff-options.txt

diff --git a/Documentation/diff-options.txt b/Documentation/diff-options.txt
index b2a05937f9c57e3a6ec70849fcc7aeca277b103b..3d2b9d0a06f38c42c0df927fa03a053fa1b45277 100644 (file)
--- a/Documentation/diff-options.txt
+++ b/Documentation/diff-options.txt
@@ -86,7 +86,7 @@
        Detect renames.
 
 -C::
-       Detect copies as well as renames.
+       Detect copies as well as renames.  See also `--find-copies-harder`.
 
 --diff-filter=[ACDMRTUXB*]::
        Select only files that are Added (`A`), Copied (`C`),
@@ -100,12 +100,13 @@
        that matches other criteria, nothing is selected.
 
 --find-copies-harder::
-       For performance reasons, by default, -C option finds copies only
+       For performance reasons, by default, `-C` option finds copies only
        if the original file of the copy was modified in the same
        changeset.  This flag makes the command
        inspect unmodified files as candidates for the source of
        copy.  This is a very expensive operation for large
-       projects, so use it with caution.
+       projects, so use it with caution.  Giving more than one
+       `-C` option has the same effect.
 
 -l<num>::
        -M and -C options require O(n^2) processing time where n
@@ -167,5 +168,13 @@
 --quiet::
        Disable all output of the program. Implies --exit-code.
 
+--ext-diff::
+       Allow an external diff helper to be executed. If you set an
+       external diff driver with gitlink:gitattributes(5), you need
+       to use this option with gitlink:git-log(1) and friends.
+
+--no-ext-diff::
+       Disallow external diff drivers.
+
 For more detailed explanation on these common options, see also
 link:diffcore.html[diffcore documentation].