X-Git-Url: https://git.octo.it/?a=blobdiff_plain;f=Documentation%2Fgit-diff-tree.txt;h=906830d4bf7b69e98fd1ef0d488976d29eae7749;hb=d9635e9c539465792b1920437b52fa8792a71650;hp=9a2947e27dc2476a78bad93957cca18a06ab037b;hpb=f7a2eb735982e921ae4379f1dcf5f7a023610393;p=git.git

diff --git a/Documentation/git-diff-tree.txt b/Documentation/git-diff-tree.txt
index 9a2947e2..906830d4 100644
--- a/Documentation/git-diff-tree.txt
+++ b/Documentation/git-diff-tree.txt
@@ -8,7 +8,10 @@ git-diff-tree - Compares the content and mode of blobs found via two tree object
 
 SYNOPSIS
 --------
-'git-diff-tree' [--stdin] [-m] [-s] [-v] [--no-commit-id] [--pretty] [-t] [-r] [--root] [<common diff options>] <tree-ish> [<tree-ish>] [<path>...]
+[verse]
+'git-diff-tree' [--stdin] [-m] [-s] [-v] [--no-commit-id] [--pretty]
+	      [-t] [-r] [-c | --cc] [--root] [<common diff options>]
+	      <tree-ish> [<tree-ish>] [<path>...]
 
 DESCRIPTION
 -----------
@@ -57,12 +60,13 @@ separated with a single space are given.
 -m::
 	By default, "git-diff-tree --stdin" does not show
 	differences for merge commits.  With this flag, it shows
-	differences to that commit from all of its parents.
+	differences to that commit from all of its parents. See
+	also '-c'.
 
 -s::
 	By default, "git-diff-tree --stdin" shows differences,
 	either in machine-readable form (without '-p') or in patch
-	form (with '-p').  This output can be supressed.  It is
+	form (with '-p').  This output can be suppressed.  It is
 	only useful with '-v' flag.
 
 -v::
@@ -78,6 +82,30 @@ separated with a single space are given.
 	git-diff-tree outputs a line with the commit ID when
 	applicable.  This flag suppressed the commit ID output.
 
+-c::
+	This flag changes the way a merge commit is displayed
+	(which means it is useful only when the command is given
+	one <tree-ish>, or '--stdin').  It shows the differences
+	from each of the parents to the merge result simultaneously
+	instead of showing pairwise diff between a parent and the
+	result one at a time (which is what the '-m' option does).
+	Furthermore, it lists only files which were modified
+	from all parents.
+
+--cc::
+	This flag changes the way a merge commit patch is displayed,
+	in a similar way to the '-c' option. It implies the '-c'
+	and '-p' options and further compresses the patch output
+	by omitting hunks that show differences from only one
+	parent, or show the same change from all but one parent
+	for an Octopus merge.  When this optimization makes all
+	hunks disappear, the commit itself and the commit log
+	message is not shown, just like in any other "empty diff" case.
+
+--always::
+	Show the commit itself and the commit log message even
+	if the diff itself is empty.
+
 
 Limiting Output
 ---------------