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-rw-r--r--Documentation/git-patch-id.txt19
1 files changed, 9 insertions, 10 deletions
diff --git a/Documentation/git-patch-id.txt b/Documentation/git-patch-id.txt
index 9a4abd1..b6fa2a8 100644
--- a/Documentation/git-patch-id.txt
+++ b/Documentation/git-patch-id.txt
@@ -3,26 +3,25 @@ git-patch-id(1)
NAME
----
-git-patch-id - Some git command not yet documented.
-
+git-patch-id - Generate a patch ID.
SYNOPSIS
--------
-'git-patch-id' [ --option ] <args>...
+'git-patch-id' < <patch>
DESCRIPTION
-----------
-Does something not yet documented.
+A "patch ID" is nothing but a SHA1 of the diff associated with a patch, with
+whitespace and line numbers ignored. As such, it's "reasonably stable", but at
+the same time also reasonably unique, ie two patches that have the same "patch
+ID" are almost guaranteed to be the same thing.
+IOW, you can use this thing to look for likely duplicate commits.
OPTIONS
-------
---option::
- Some option not yet documented.
-
-<args>...::
- Some argument not yet documented.
-
+<patch>::
+ The diff to create the ID of.
Author
------