1 The output format from "git-diff-index", "git-diff-tree",
2 "git-diff-files" and "git diff --raw" are very similar.
4 These commands all compare two sets of things; what is
7 git-diff-index <tree-ish>::
8 compares the <tree-ish> and the files on the filesystem.
10 git-diff-index --cached <tree-ish>::
11 compares the <tree-ish> and the index.
13 git-diff-tree [-r] <tree-ish-1> <tree-ish-2> [<pattern>...]::
14 compares the trees named by the two arguments.
16 git-diff-files [<pattern>...]::
17 compares the index and the files on the filesystem.
20 An output line is formatted this way:
22 ------------------------------------------------
23 in-place edit :100644 100644 bcd1234... 0123456... M file0
24 copy-edit :100644 100644 abcd123... 1234567... C68 file1 file2
25 rename-edit :100644 100644 abcd123... 1234567... R86 file1 file3
26 create :000000 100644 0000000... 1234567... A file4
27 delete :100644 000000 1234567... 0000000... D file5
28 unmerged :000000 000000 0000000... 0000000... U file6
29 ------------------------------------------------
31 That is, from the left to the right:
34 . mode for "src"; 000000 if creation or unmerged.
36 . mode for "dst"; 000000 if deletion or unmerged.
38 . sha1 for "src"; 0\{40\} if creation or unmerged.
40 . sha1 for "dst"; 0\{40\} if creation, unmerged or "look at work tree".
42 . status, followed by optional "score" number.
43 . a tab or a NUL when '-z' option is used.
45 . a tab or a NUL when '-z' option is used; only exists for C or R.
46 . path for "dst"; only exists for C or R.
47 . an LF or a NUL when '-z' option is used, to terminate the record.
49 Possible status letters are:
51 - A: addition of a file
52 - C: copy of a file into a new one
53 - D: deletion of a file
54 - M: modification of the contents or mode of a file
55 - R: renaming of a file
56 - T: change in the type of the file
57 - U: file is unmerged (you must complete the merge before it can
59 - X: "unknown" change type (most probably a bug, please report it)
61 Status letters C and M are always followed by a score (denoting the
62 percentage of similarity between the source and target of the move or
63 copy), and are the only ones to be so.
65 <sha1> is shown as all 0's if a file is new on the filesystem
66 and it is out of sync with the index.
70 ------------------------------------------------
71 :100644 100644 5be4a4...... 000000...... M file.c
72 ------------------------------------------------
74 When `-z` option is not used, TAB, LF, and backslash characters
75 in pathnames are represented as `\t`, `\n`, and `\\`,
78 diff format for merges
79 ----------------------
81 "git-diff-tree", "git-diff-files" and "git-diff --raw"
82 can take '-c' or '--cc' option
83 to generate diff output also for merge commits. The output differs
84 from the format described above in the following way:
86 . there is a colon for each parent
87 . there are more "src" modes and "src" sha1
88 . status is concatenated status characters for each parent
89 . no optional "score" number
90 . single path, only for "dst"
94 ------------------------------------------------
95 ::100644 100644 100644 fabadb8... cc95eb0... 4866510... MM describe.c
96 ------------------------------------------------
98 Note that 'combined diff' lists only files which were modified from
102 include::diff-generate-patch.txt[]
108 The `--summary` option describes newly added, deleted, renamed and
109 copied files. The `--stat` option adds diffstat(1) graph to the
110 output. These options can be combined with other options, such as
111 `-p`, and are meant for human consumption.
113 When showing a change that involves a rename or a copy, `--stat` output
114 formats the pathnames compactly by combining common prefix and suffix of
115 the pathnames. For example, a change that moves `arch/i386/Makefile` to
116 `arch/x86/Makefile` while modifying 4 lines will be shown like this:
118 ------------------------------------
119 arch/{i386 => x86}/Makefile | 4 +--
120 ------------------------------------
122 The `--numstat` option gives the diffstat(1) information but is designed
123 for easier machine consumption. An entry in `--numstat` output looks
126 ----------------------------------------
128 3 1 arch/{i386 => x86}/Makefile
129 ----------------------------------------
131 That is, from left to right:
133 . the number of added lines;
135 . the number of deleted lines;
137 . pathname (possibly with rename/copy information);
140 When `-z` output option is in effect, the output is formatted this way:
142 ----------------------------------------
144 3 1 NUL arch/i386/Makefile NUL arch/x86/Makefile NUL
145 ----------------------------------------
149 . the number of added lines;
151 . the number of deleted lines;
153 . a NUL (only exists if renamed/copied);
154 . pathname in preimage;
155 . a NUL (only exists if renamed/copied);
156 . pathname in postimage (only exists if renamed/copied);
159 The extra `NUL` before the preimage path in renamed case is to allow
160 scripts that read the output to tell if the current record being read is
161 a single-path record or a rename/copy record without reading ahead.
162 After reading added and deleted lines, reading up to `NUL` would yield
163 the pathname, but if that is `NUL`, the record will show two paths.