d76ce4f734
The combined diff format for merges will only list one filename, even if rename or copy detection is active. For example, with raw format one might see: ::100644 100644 100644fabadb8cc95eb04866510MM describe.c ::100755 100755 100755 52b7a2d 6d1ac04 d2ac7d7 RM bar.sh ::100644 100644 100644 e07d6c5 9042e82 ee91881 RR phooey.c This doesn't let us know what the original name of bar.sh was in the first parent, and doesn't let us know what either of the original names of phooey.c were in either of the parents. In contrast, for non-merge commits, raw format does provide original filenames (and a rename score to boot). In order to also provide original filenames for merge commits, add a --combined-all-paths option (which must be used with either -c or --cc, and is likely only useful with rename or copy detection active) so that we can print tab-separated filenames when renames are involved. This transforms the above output to: ::100644 100644 100644fabadb8cc95eb04866510MM desc.c desc.c desc.c ::100755 100755 100755 52b7a2d 6d1ac04 d2ac7d7 RM foo.sh bar.sh bar.sh ::100644 100644 100644 e07d6c5 9042e82 ee91881 RR fooey.c fuey.c phooey.c Further, in patch format, this changes the from/to headers so that instead of just having one "from" header, we get one for each parent. For example, instead of having --- a/phooey.c +++ b/phooey.c we would see --- a/fooey.c --- a/fuey.c +++ b/phooey.c Signed-off-by: Elijah Newren <newren@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
186 lines
6.4 KiB
Plaintext
186 lines
6.4 KiB
Plaintext
Raw output format
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-----------------
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The raw output format from "git-diff-index", "git-diff-tree",
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"git-diff-files" and "git diff --raw" are very similar.
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These commands all compare two sets of things; what is
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compared differs:
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git-diff-index <tree-ish>::
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compares the <tree-ish> and the files on the filesystem.
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git-diff-index --cached <tree-ish>::
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compares the <tree-ish> and the index.
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git-diff-tree [-r] <tree-ish-1> <tree-ish-2> [<pattern>...]::
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compares the trees named by the two arguments.
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git-diff-files [<pattern>...]::
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compares the index and the files on the filesystem.
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The "git-diff-tree" command begins its output by printing the hash of
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what is being compared. After that, all the commands print one output
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line per changed file.
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An output line is formatted this way:
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------------------------------------------------
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in-place edit :100644 100644 bcd1234 0123456 M file0
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copy-edit :100644 100644 abcd123 1234567 C68 file1 file2
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rename-edit :100644 100644 abcd123 1234567 R86 file1 file3
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create :000000 100644 0000000 1234567 A file4
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delete :100644 000000 1234567 0000000 D file5
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unmerged :000000 000000 0000000 0000000 U file6
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------------------------------------------------
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That is, from the left to the right:
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. a colon.
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. mode for "src"; 000000 if creation or unmerged.
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. a space.
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. mode for "dst"; 000000 if deletion or unmerged.
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. a space.
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. sha1 for "src"; 0\{40\} if creation or unmerged.
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. a space.
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. sha1 for "dst"; 0\{40\} if creation, unmerged or "look at work tree".
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. a space.
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. status, followed by optional "score" number.
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. a tab or a NUL when `-z` option is used.
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. path for "src"
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. a tab or a NUL when `-z` option is used; only exists for C or R.
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. path for "dst"; only exists for C or R.
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. an LF or a NUL when `-z` option is used, to terminate the record.
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Possible status letters are:
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- A: addition of a file
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- C: copy of a file into a new one
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- D: deletion of a file
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- M: modification of the contents or mode of a file
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- R: renaming of a file
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- T: change in the type of the file
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- U: file is unmerged (you must complete the merge before it can
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be committed)
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- X: "unknown" change type (most probably a bug, please report it)
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Status letters C and R are always followed by a score (denoting the
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percentage of similarity between the source and target of the move or
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copy). Status letter M may be followed by a score (denoting the
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percentage of dissimilarity) for file rewrites.
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<sha1> is shown as all 0's if a file is new on the filesystem
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and it is out of sync with the index.
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Example:
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------------------------------------------------
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:100644 100644 5be4a4a 0000000 M file.c
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------------------------------------------------
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Without the `-z` option, pathnames with "unusual" characters are
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quoted as explained for the configuration variable `core.quotePath`
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(see linkgit:git-config[1]). Using `-z` the filename is output
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verbatim and the line is terminated by a NUL byte.
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diff format for merges
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----------------------
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"git-diff-tree", "git-diff-files" and "git-diff --raw"
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can take `-c` or `--cc` option
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to generate diff output also for merge commits. The output differs
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from the format described above in the following way:
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. there is a colon for each parent
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. there are more "src" modes and "src" sha1
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. status is concatenated status characters for each parent
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. no optional "score" number
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. tab-separated pathname(s) of the file
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For `-c` and `--cc`, only the destination or final path is shown even
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if the file was renamed on any side of history. With
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`--combined-all-paths`, the name of the path in each parent is shown
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followed by the name of the path in the merge commit.
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Examples for `-c` and `--cc` without `--combined-all-paths`:
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------------------------------------------------
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::100644 100644 100644 fabadb8 cc95eb0 4866510 MM desc.c
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::100755 100755 100755 52b7a2d 6d1ac04 d2ac7d7 RM bar.sh
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::100644 100644 100644 e07d6c5 9042e82 ee91881 RR phooey.c
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------------------------------------------------
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Examples when `--combined-all-paths` added to either `-c` or `--cc`:
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------------------------------------------------
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::100644 100644 100644 fabadb8 cc95eb0 4866510 MM desc.c desc.c desc.c
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::100755 100755 100755 52b7a2d 6d1ac04 d2ac7d7 RM foo.sh bar.sh bar.sh
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::100644 100644 100644 e07d6c5 9042e82 ee91881 RR fooey.c fuey.c phooey.c
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------------------------------------------------
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Note that 'combined diff' lists only files which were modified from
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all parents.
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include::diff-generate-patch.txt[]
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other diff formats
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------------------
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The `--summary` option describes newly added, deleted, renamed and
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copied files. The `--stat` option adds diffstat(1) graph to the
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output. These options can be combined with other options, such as
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`-p`, and are meant for human consumption.
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When showing a change that involves a rename or a copy, `--stat` output
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formats the pathnames compactly by combining common prefix and suffix of
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the pathnames. For example, a change that moves `arch/i386/Makefile` to
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`arch/x86/Makefile` while modifying 4 lines will be shown like this:
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------------------------------------
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arch/{i386 => x86}/Makefile | 4 +--
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------------------------------------
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The `--numstat` option gives the diffstat(1) information but is designed
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for easier machine consumption. An entry in `--numstat` output looks
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like this:
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----------------------------------------
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1 2 README
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3 1 arch/{i386 => x86}/Makefile
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----------------------------------------
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That is, from left to right:
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. the number of added lines;
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. a tab;
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. the number of deleted lines;
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. a tab;
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. pathname (possibly with rename/copy information);
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. a newline.
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When `-z` output option is in effect, the output is formatted this way:
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----------------------------------------
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1 2 README NUL
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3 1 NUL arch/i386/Makefile NUL arch/x86/Makefile NUL
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----------------------------------------
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That is:
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. the number of added lines;
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. a tab;
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. the number of deleted lines;
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. a tab;
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. a NUL (only exists if renamed/copied);
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. pathname in preimage;
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. a NUL (only exists if renamed/copied);
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. pathname in postimage (only exists if renamed/copied);
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. a NUL.
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The extra `NUL` before the preimage path in renamed case is to allow
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scripts that read the output to tell if the current record being read is
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a single-path record or a rename/copy record without reading ahead.
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After reading added and deleted lines, reading up to `NUL` would yield
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the pathname, but if that is `NUL`, the record will show two paths.
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