fetch.c: do not call process_tree() from process_tree().
[git/git.git] / Documentation / git-patch-id.txt
1 git-patch-id(1)
2 ===============
3
4 NAME
5 ----
6 git-patch-id - Generate a patch ID
7
8 SYNOPSIS
9 --------
10 'git-patch-id' < <patch>
11
12 DESCRIPTION
13 -----------
14 A "patch ID" is nothing but a SHA1 of the diff associated with a patch, with
15 whitespace and line numbers ignored. As such, it's "reasonably stable", but at
16 the same time also reasonably unique, ie two patches that have the same "patch
17 ID" are almost guaranteed to be the same thing.
18
19 IOW, you can use this thing to look for likely duplicate commits.
20
21 When dealing with git-diff-tree output, it takes advantage of
22 the fact that the patch is prefixed with the object name of the
23 commit, and outputs two 40-byte hexadecimal string. The first
24 string is the patch ID, and the second string is the commit ID.
25 This can be used to make a mapping from patch ID to commit ID.
26
27 OPTIONS
28 -------
29 <patch>::
30 The diff to create the ID of.
31
32 Author
33 ------
34 Written by Linus Torvalds <torvalds@osdl.org>
35
36 Documentation
37 --------------
38 Documentation by Junio C Hamano and the git-list <git@vger.kernel.org>.
39
40 GIT
41 ---
42 Part of the gitlink:git[7] suite
43