1GIT-DIFF-TREE(1)                  Git Manual                  GIT-DIFF-TREE(1)
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NAME

6       git-diff-tree - Compares the content and mode of blobs found via two
7       tree objects
8

SYNOPSIS

10       git diff-tree [--stdin] [-m] [-s] [-v] [--no-commit-id] [--pretty]
11                     [-t] [-r] [-c | --cc] [--root] [<common diff options>]
12                     <tree-ish> [<tree-ish>] [<path>...]
13
14

DESCRIPTION

16       Compares the content and mode of the blobs found via two tree objects.
17
18       If there is only one <tree-ish> given, the commit is compared with its
19       parents (see --stdin below).
20
21       Note that git diff-tree can use the tree encapsulated in a commit
22       object.
23

OPTIONS

25       -p, -u, --patch
26           Generate patch (see section on generating patches).
27
28       -s, --no-patch
29           Suppress diff output. Useful for commands like git show that show
30           the patch by default, or to cancel the effect of --patch.
31
32       -U<n>, --unified=<n>
33           Generate diffs with <n> lines of context instead of the usual
34           three. Implies -p.
35
36       --raw
37           Generate the diff in raw format. This is the default.
38
39       --patch-with-raw
40           Synonym for -p --raw.
41
42       --indent-heuristic
43           Enable the heuristic that shifts diff hunk boundaries to make
44           patches easier to read. This is the default.
45
46       --no-indent-heuristic
47           Disable the indent heuristic.
48
49       --minimal
50           Spend extra time to make sure the smallest possible diff is
51           produced.
52
53       --patience
54           Generate a diff using the "patience diff" algorithm.
55
56       --histogram
57           Generate a diff using the "histogram diff" algorithm.
58
59       --anchored=<text>
60           Generate a diff using the "anchored diff" algorithm.
61
62           This option may be specified more than once.
63
64           If a line exists in both the source and destination, exists only
65           once, and starts with this text, this algorithm attempts to prevent
66           it from appearing as a deletion or addition in the output. It uses
67           the "patience diff" algorithm internally.
68
69       --diff-algorithm={patience|minimal|histogram|myers}
70           Choose a diff algorithm. The variants are as follows:
71
72           default, myers
73               The basic greedy diff algorithm. Currently, this is the
74               default.
75
76           minimal
77               Spend extra time to make sure the smallest possible diff is
78               produced.
79
80           patience
81               Use "patience diff" algorithm when generating patches.
82
83           histogram
84               This algorithm extends the patience algorithm to "support
85               low-occurrence common elements".
86
87           For instance, if you configured the diff.algorithm variable to a
88           non-default value and want to use the default one, then you have to
89           use --diff-algorithm=default option.
90
91       --stat[=<width>[,<name-width>[,<count>]]]
92           Generate a diffstat. By default, as much space as necessary will be
93           used for the filename part, and the rest for the graph part.
94           Maximum width defaults to terminal width, or 80 columns if not
95           connected to a terminal, and can be overridden by <width>. The
96           width of the filename part can be limited by giving another width
97           <name-width> after a comma. The width of the graph part can be
98           limited by using --stat-graph-width=<width> (affects all commands
99           generating a stat graph) or by setting diff.statGraphWidth=<width>
100           (does not affect git format-patch). By giving a third parameter
101           <count>, you can limit the output to the first <count> lines,
102           followed by ...  if there are more.
103
104           These parameters can also be set individually with
105           --stat-width=<width>, --stat-name-width=<name-width> and
106           --stat-count=<count>.
107
108       --compact-summary
109           Output a condensed summary of extended header information such as
110           file creations or deletions ("new" or "gone", optionally "+l" if
111           it’s a symlink) and mode changes ("+x" or "-x" for adding or
112           removing executable bit respectively) in diffstat. The information
113           is put between the filename part and the graph part. Implies
114           --stat.
115
116       --numstat
117           Similar to --stat, but shows number of added and deleted lines in
118           decimal notation and pathname without abbreviation, to make it more
119           machine friendly. For binary files, outputs two - instead of saying
120           0 0.
121
122       --shortstat
123           Output only the last line of the --stat format containing total
124           number of modified files, as well as number of added and deleted
125           lines.
126
127       --dirstat[=<param1,param2,...>]
128           Output the distribution of relative amount of changes for each
129           sub-directory. The behavior of --dirstat can be customized by
130           passing it a comma separated list of parameters. The defaults are
131           controlled by the diff.dirstat configuration variable (see git-
132           config(1)). The following parameters are available:
133
134           changes
135               Compute the dirstat numbers by counting the lines that have
136               been removed from the source, or added to the destination. This
137               ignores the amount of pure code movements within a file. In
138               other words, rearranging lines in a file is not counted as much
139               as other changes. This is the default behavior when no
140               parameter is given.
141
142           lines
143               Compute the dirstat numbers by doing the regular line-based
144               diff analysis, and summing the removed/added line counts. (For
145               binary files, count 64-byte chunks instead, since binary files
146               have no natural concept of lines). This is a more expensive
147               --dirstat behavior than the changes behavior, but it does count
148               rearranged lines within a file as much as other changes. The
149               resulting output is consistent with what you get from the other
150               --*stat options.
151
152           files
153               Compute the dirstat numbers by counting the number of files
154               changed. Each changed file counts equally in the dirstat
155               analysis. This is the computationally cheapest --dirstat
156               behavior, since it does not have to look at the file contents
157               at all.
158
159           cumulative
160               Count changes in a child directory for the parent directory as
161               well. Note that when using cumulative, the sum of the
162               percentages reported may exceed 100%. The default
163               (non-cumulative) behavior can be specified with the
164               noncumulative parameter.
165
166           <limit>
167               An integer parameter specifies a cut-off percent (3% by
168               default). Directories contributing less than this percentage of
169               the changes are not shown in the output.
170
171           Example: The following will count changed files, while ignoring
172           directories with less than 10% of the total amount of changed
173           files, and accumulating child directory counts in the parent
174           directories: --dirstat=files,10,cumulative.
175
176       --summary
177           Output a condensed summary of extended header information such as
178           creations, renames and mode changes.
179
180       --patch-with-stat
181           Synonym for -p --stat.
182
183       -z
184           When --raw, --numstat, --name-only or --name-status has been given,
185           do not munge pathnames and use NULs as output field terminators.
186
187           Without this option, pathnames with "unusual" characters are quoted
188           as explained for the configuration variable core.quotePath (see
189           git-config(1)).
190
191       --name-only
192           Show only names of changed files.
193
194       --name-status
195           Show only names and status of changed files. See the description of
196           the --diff-filter option on what the status letters mean.
197
198       --submodule[=<format>]
199           Specify how differences in submodules are shown. When specifying
200           --submodule=short the short format is used. This format just shows
201           the names of the commits at the beginning and end of the range.
202           When --submodule or --submodule=log is specified, the log format is
203           used. This format lists the commits in the range like git-
204           submodule(1) summary does. When --submodule=diff is specified, the
205           diff format is used. This format shows an inline diff of the
206           changes in the submodule contents between the commit range.
207           Defaults to diff.submodule or the short format if the config option
208           is unset.
209
210       --color[=<when>]
211           Show colored diff.  --color (i.e. without =<when>) is the same as
212           --color=always.  <when> can be one of always, never, or auto.
213
214       --no-color
215           Turn off colored diff. It is the same as --color=never.
216
217       --color-moved[=<mode>]
218           Moved lines of code are colored differently. The <mode> defaults to
219           no if the option is not given and to zebra if the option with no
220           mode is given. The mode must be one of:
221
222           no
223               Moved lines are not highlighted.
224
225           default
226               Is a synonym for zebra. This may change to a more sensible mode
227               in the future.
228
229           plain
230               Any line that is added in one location and was removed in
231               another location will be colored with color.diff.newMoved.
232               Similarly color.diff.oldMoved will be used for removed lines
233               that are added somewhere else in the diff. This mode picks up
234               any moved line, but it is not very useful in a review to
235               determine if a block of code was moved without permutation.
236
237           blocks
238               Blocks of moved text of at least 20 alphanumeric characters are
239               detected greedily. The detected blocks are painted using either
240               the color.diff.{old,new}Moved color. Adjacent blocks cannot be
241               told apart.
242
243           zebra
244               Blocks of moved text are detected as in blocks mode. The blocks
245               are painted using either the color.diff.{old,new}Moved color or
246               color.diff.{old,new}MovedAlternative. The change between the
247               two colors indicates that a new block was detected.
248
249           dimmed-zebra
250               Similar to zebra, but additional dimming of uninteresting parts
251               of moved code is performed. The bordering lines of two adjacent
252               blocks are considered interesting, the rest is uninteresting.
253               dimmed_zebra is a deprecated synonym.
254
255       --no-color-moved
256           Turn off move detection. This can be used to override configuration
257           settings. It is the same as --color-moved=no.
258
259       --color-moved-ws=<modes>
260           This configures how whitespace is ignored when performing the move
261           detection for --color-moved. These modes can be given as a comma
262           separated list:
263
264           no
265               Do not ignore whitespace when performing move detection.
266
267           ignore-space-at-eol
268               Ignore changes in whitespace at EOL.
269
270           ignore-space-change
271               Ignore changes in amount of whitespace. This ignores whitespace
272               at line end, and considers all other sequences of one or more
273               whitespace characters to be equivalent.
274
275           ignore-all-space
276               Ignore whitespace when comparing lines. This ignores
277               differences even if one line has whitespace where the other
278               line has none.
279
280           allow-indentation-change
281               Initially ignore any whitespace in the move detection, then
282               group the moved code blocks only into a block if the change in
283               whitespace is the same per line. This is incompatible with the
284               other modes.
285
286       --no-color-moved-ws
287           Do not ignore whitespace when performing move detection. This can
288           be used to override configuration settings. It is the same as
289           --color-moved-ws=no.
290
291       --word-diff[=<mode>]
292           Show a word diff, using the <mode> to delimit changed words. By
293           default, words are delimited by whitespace; see --word-diff-regex
294           below. The <mode> defaults to plain, and must be one of:
295
296           color
297               Highlight changed words using only colors. Implies --color.
298
299           plain
300               Show words as [-removed-] and {+added+}. Makes no attempts to
301               escape the delimiters if they appear in the input, so the
302               output may be ambiguous.
303
304           porcelain
305               Use a special line-based format intended for script
306               consumption. Added/removed/unchanged runs are printed in the
307               usual unified diff format, starting with a +/-/` ` character at
308               the beginning of the line and extending to the end of the line.
309               Newlines in the input are represented by a tilde ~ on a line of
310               its own.
311
312           none
313               Disable word diff again.
314
315           Note that despite the name of the first mode, color is used to
316           highlight the changed parts in all modes if enabled.
317
318       --word-diff-regex=<regex>
319           Use <regex> to decide what a word is, instead of considering runs
320           of non-whitespace to be a word. Also implies --word-diff unless it
321           was already enabled.
322
323           Every non-overlapping match of the <regex> is considered a word.
324           Anything between these matches is considered whitespace and
325           ignored(!) for the purposes of finding differences. You may want to
326           append |[^[:space:]] to your regular expression to make sure that
327           it matches all non-whitespace characters. A match that contains a
328           newline is silently truncated(!) at the newline.
329
330           For example, --word-diff-regex=.  will treat each character as a
331           word and, correspondingly, show differences character by character.
332
333           The regex can also be set via a diff driver or configuration
334           option, see gitattributes(5) or git-config(1). Giving it explicitly
335           overrides any diff driver or configuration setting. Diff drivers
336           override configuration settings.
337
338       --color-words[=<regex>]
339           Equivalent to --word-diff=color plus (if a regex was specified)
340           --word-diff-regex=<regex>.
341
342       --no-renames
343           Turn off rename detection, even when the configuration file gives
344           the default to do so.
345
346       --check
347           Warn if changes introduce conflict markers or whitespace errors.
348           What are considered whitespace errors is controlled by
349           core.whitespace configuration. By default, trailing whitespaces
350           (including lines that consist solely of whitespaces) and a space
351           character that is immediately followed by a tab character inside
352           the initial indent of the line are considered whitespace errors.
353           Exits with non-zero status if problems are found. Not compatible
354           with --exit-code.
355
356       --ws-error-highlight=<kind>
357           Highlight whitespace errors in the context, old or new lines of the
358           diff. Multiple values are separated by comma, none resets previous
359           values, default reset the list to new and all is a shorthand for
360           old,new,context. When this option is not given, and the
361           configuration variable diff.wsErrorHighlight is not set, only
362           whitespace errors in new lines are highlighted. The whitespace
363           errors are colored with color.diff.whitespace.
364
365       --full-index
366           Instead of the first handful of characters, show the full pre- and
367           post-image blob object names on the "index" line when generating
368           patch format output.
369
370       --binary
371           In addition to --full-index, output a binary diff that can be
372           applied with git-apply.
373
374       --abbrev[=<n>]
375           Instead of showing the full 40-byte hexadecimal object name in
376           diff-raw format output and diff-tree header lines, show only a
377           partial prefix. This is independent of the --full-index option
378           above, which controls the diff-patch output format. Non default
379           number of digits can be specified with --abbrev=<n>.
380
381       -B[<n>][/<m>], --break-rewrites[=[<n>][/<m>]]
382           Break complete rewrite changes into pairs of delete and create.
383           This serves two purposes:
384
385           It affects the way a change that amounts to a total rewrite of a
386           file not as a series of deletion and insertion mixed together with
387           a very few lines that happen to match textually as the context, but
388           as a single deletion of everything old followed by a single
389           insertion of everything new, and the number m controls this aspect
390           of the -B option (defaults to 60%).  -B/70% specifies that less
391           than 30% of the original should remain in the result for Git to
392           consider it a total rewrite (i.e. otherwise the resulting patch
393           will be a series of deletion and insertion mixed together with
394           context lines).
395
396           When used with -M, a totally-rewritten file is also considered as
397           the source of a rename (usually -M only considers a file that
398           disappeared as the source of a rename), and the number n controls
399           this aspect of the -B option (defaults to 50%).  -B20% specifies
400           that a change with addition and deletion compared to 20% or more of
401           the file’s size are eligible for being picked up as a possible
402           source of a rename to another file.
403
404       -M[<n>], --find-renames[=<n>]
405           Detect renames. If n is specified, it is a threshold on the
406           similarity index (i.e. amount of addition/deletions compared to the
407           file’s size). For example, -M90% means Git should consider a
408           delete/add pair to be a rename if more than 90% of the file hasn’t
409           changed. Without a % sign, the number is to be read as a fraction,
410           with a decimal point before it. I.e., -M5 becomes 0.5, and is thus
411           the same as -M50%. Similarly, -M05 is the same as -M5%. To limit
412           detection to exact renames, use -M100%. The default similarity
413           index is 50%.
414
415       -C[<n>], --find-copies[=<n>]
416           Detect copies as well as renames. See also --find-copies-harder. If
417           n is specified, it has the same meaning as for -M<n>.
418
419       --find-copies-harder
420           For performance reasons, by default, -C option finds copies only if
421           the original file of the copy was modified in the same changeset.
422           This flag makes the command inspect unmodified files as candidates
423           for the source of copy. This is a very expensive operation for
424           large projects, so use it with caution. Giving more than one -C
425           option has the same effect.
426
427       -D, --irreversible-delete
428           Omit the preimage for deletes, i.e. print only the header but not
429           the diff between the preimage and /dev/null. The resulting patch is
430           not meant to be applied with patch or git apply; this is solely for
431           people who want to just concentrate on reviewing the text after the
432           change. In addition, the output obviously lacks enough information
433           to apply such a patch in reverse, even manually, hence the name of
434           the option.
435
436           When used together with -B, omit also the preimage in the deletion
437           part of a delete/create pair.
438
439       -l<num>
440           The -M and -C options require O(n^2) processing time where n is the
441           number of potential rename/copy targets. This option prevents
442           rename/copy detection from running if the number of rename/copy
443           targets exceeds the specified number.
444
445       --diff-filter=[(A|C|D|M|R|T|U|X|B)...[*]]
446           Select only files that are Added (A), Copied (C), Deleted (D),
447           Modified (M), Renamed (R), have their type (i.e. regular file,
448           symlink, submodule, ...) changed (T), are Unmerged (U), are Unknown
449           (X), or have had their pairing Broken (B). Any combination of the
450           filter characters (including none) can be used. When *
451           (All-or-none) is added to the combination, all paths are selected
452           if there is any file that matches other criteria in the comparison;
453           if there is no file that matches other criteria, nothing is
454           selected.
455
456           Also, these upper-case letters can be downcased to exclude. E.g.
457           --diff-filter=ad excludes added and deleted paths.
458
459           Note that not all diffs can feature all types. For instance, diffs
460           from the index to the working tree can never have Added entries
461           (because the set of paths included in the diff is limited by what
462           is in the index). Similarly, copied and renamed entries cannot
463           appear if detection for those types is disabled.
464
465       -S<string>
466           Look for differences that change the number of occurrences of the
467           specified string (i.e. addition/deletion) in a file. Intended for
468           the scripter’s use.
469
470           It is useful when you’re looking for an exact block of code (like a
471           struct), and want to know the history of that block since it first
472           came into being: use the feature iteratively to feed the
473           interesting block in the preimage back into -S, and keep going
474           until you get the very first version of the block.
475
476           Binary files are searched as well.
477
478       -G<regex>
479           Look for differences whose patch text contains added/removed lines
480           that match <regex>.
481
482           To illustrate the difference between -S<regex> --pickaxe-regex and
483           -G<regex>, consider a commit with the following diff in the same
484           file:
485
486               +    return !regexec(regexp, two->ptr, 1, &regmatch, 0);
487               ...
488               -    hit = !regexec(regexp, mf2.ptr, 1, &regmatch, 0);
489
490           While git log -G"regexec\(regexp" will show this commit, git log
491           -S"regexec\(regexp" --pickaxe-regex will not (because the number of
492           occurrences of that string did not change).
493
494           Unless --text is supplied patches of binary files without a
495           textconv filter will be ignored.
496
497           See the pickaxe entry in gitdiffcore(7) for more information.
498
499       --find-object=<object-id>
500           Look for differences that change the number of occurrences of the
501           specified object. Similar to -S, just the argument is different in
502           that it doesn’t search for a specific string but for a specific
503           object id.
504
505           The object can be a blob or a submodule commit. It implies the -t
506           option in git-log to also find trees.
507
508       --pickaxe-all
509           When -S or -G finds a change, show all the changes in that
510           changeset, not just the files that contain the change in <string>.
511
512       --pickaxe-regex
513           Treat the <string> given to -S as an extended POSIX regular
514           expression to match.
515
516       -O<orderfile>
517           Control the order in which files appear in the output. This
518           overrides the diff.orderFile configuration variable (see git-
519           config(1)). To cancel diff.orderFile, use -O/dev/null.
520
521           The output order is determined by the order of glob patterns in
522           <orderfile>. All files with pathnames that match the first pattern
523           are output first, all files with pathnames that match the second
524           pattern (but not the first) are output next, and so on. All files
525           with pathnames that do not match any pattern are output last, as if
526           there was an implicit match-all pattern at the end of the file. If
527           multiple pathnames have the same rank (they match the same pattern
528           but no earlier patterns), their output order relative to each other
529           is the normal order.
530
531           <orderfile> is parsed as follows:
532
533           ·   Blank lines are ignored, so they can be used as separators for
534               readability.
535
536           ·   Lines starting with a hash ("#") are ignored, so they can be
537               used for comments. Add a backslash ("\") to the beginning of
538               the pattern if it starts with a hash.
539
540           ·   Each other line contains a single pattern.
541
542           Patterns have the same syntax and semantics as patterns used for
543           fnmatch(3) without the FNM_PATHNAME flag, except a pathname also
544           matches a pattern if removing any number of the final pathname
545           components matches the pattern. For example, the pattern "foo*bar"
546           matches "fooasdfbar" and "foo/bar/baz/asdf" but not "foobarx".
547
548       -R
549           Swap two inputs; that is, show differences from index or on-disk
550           file to tree contents.
551
552       --relative[=<path>]
553           When run from a subdirectory of the project, it can be told to
554           exclude changes outside the directory and show pathnames relative
555           to it with this option. When you are not in a subdirectory (e.g. in
556           a bare repository), you can name which subdirectory to make the
557           output relative to by giving a <path> as an argument.
558
559       -a, --text
560           Treat all files as text.
561
562       --ignore-cr-at-eol
563           Ignore carriage-return at the end of line when doing a comparison.
564
565       --ignore-space-at-eol
566           Ignore changes in whitespace at EOL.
567
568       -b, --ignore-space-change
569           Ignore changes in amount of whitespace. This ignores whitespace at
570           line end, and considers all other sequences of one or more
571           whitespace characters to be equivalent.
572
573       -w, --ignore-all-space
574           Ignore whitespace when comparing lines. This ignores differences
575           even if one line has whitespace where the other line has none.
576
577       --ignore-blank-lines
578           Ignore changes whose lines are all blank.
579
580       --inter-hunk-context=<lines>
581           Show the context between diff hunks, up to the specified number of
582           lines, thereby fusing hunks that are close to each other. Defaults
583           to diff.interHunkContext or 0 if the config option is unset.
584
585       -W, --function-context
586           Show whole surrounding functions of changes.
587
588       --exit-code
589           Make the program exit with codes similar to diff(1). That is, it
590           exits with 1 if there were differences and 0 means no differences.
591
592       --quiet
593           Disable all output of the program. Implies --exit-code.
594
595       --ext-diff
596           Allow an external diff helper to be executed. If you set an
597           external diff driver with gitattributes(5), you need to use this
598           option with git-log(1) and friends.
599
600       --no-ext-diff
601           Disallow external diff drivers.
602
603       --textconv, --no-textconv
604           Allow (or disallow) external text conversion filters to be run when
605           comparing binary files. See gitattributes(5) for details. Because
606           textconv filters are typically a one-way conversion, the resulting
607           diff is suitable for human consumption, but cannot be applied. For
608           this reason, textconv filters are enabled by default only for git-
609           diff(1) and git-log(1), but not for git-format-patch(1) or diff
610           plumbing commands.
611
612       --ignore-submodules[=<when>]
613           Ignore changes to submodules in the diff generation. <when> can be
614           either "none", "untracked", "dirty" or "all", which is the default.
615           Using "none" will consider the submodule modified when it either
616           contains untracked or modified files or its HEAD differs from the
617           commit recorded in the superproject and can be used to override any
618           settings of the ignore option in git-config(1) or gitmodules(5).
619           When "untracked" is used submodules are not considered dirty when
620           they only contain untracked content (but they are still scanned for
621           modified content). Using "dirty" ignores all changes to the work
622           tree of submodules, only changes to the commits stored in the
623           superproject are shown (this was the behavior until 1.7.0). Using
624           "all" hides all changes to submodules.
625
626       --src-prefix=<prefix>
627           Show the given source prefix instead of "a/".
628
629       --dst-prefix=<prefix>
630           Show the given destination prefix instead of "b/".
631
632       --no-prefix
633           Do not show any source or destination prefix.
634
635       --line-prefix=<prefix>
636           Prepend an additional prefix to every line of output.
637
638       --ita-invisible-in-index
639           By default entries added by "git add -N" appear as an existing
640           empty file in "git diff" and a new file in "git diff --cached".
641           This option makes the entry appear as a new file in "git diff" and
642           non-existent in "git diff --cached". This option could be reverted
643           with --ita-visible-in-index. Both options are experimental and
644           could be removed in future.
645
646       For more detailed explanation on these common options, see also
647       gitdiffcore(7).
648
649       <tree-ish>
650           The id of a tree object.
651
652       <path>...
653           If provided, the results are limited to a subset of files matching
654           one of the provided pathspecs.
655
656       -r
657           recurse into sub-trees
658
659       -t
660           show tree entry itself as well as subtrees. Implies -r.
661
662       --root
663           When --root is specified the initial commit will be shown as a big
664           creation event. This is equivalent to a diff against the NULL tree.
665
666       --stdin
667           When --stdin is specified, the command does not take <tree-ish>
668           arguments from the command line. Instead, it reads lines containing
669           either two <tree>, one <commit>, or a list of <commit> from its
670           standard input. (Use a single space as separator.)
671
672           When two trees are given, it compares the first tree with the
673           second. When a single commit is given, it compares the commit with
674           its parents. The remaining commits, when given, are used as if they
675           are parents of the first commit.
676
677           When comparing two trees, the ID of both trees (separated by a
678           space and terminated by a newline) is printed before the
679           difference. When comparing commits, the ID of the first (or only)
680           commit, followed by a newline, is printed.
681
682           The following flags further affect the behavior when comparing
683           commits (but not trees).
684
685       -m
686           By default, git diff-tree --stdin does not show differences for
687           merge commits. With this flag, it shows differences to that commit
688           from all of its parents. See also -c.
689
690       -s
691           By default, git diff-tree --stdin shows differences, either in
692           machine-readable form (without -p) or in patch form (with -p). This
693           output can be suppressed. It is only useful with -v flag.
694
695       -v
696           This flag causes git diff-tree --stdin to also show the commit
697           message before the differences.
698
699       --pretty[=<format>], --format=<format>
700           Pretty-print the contents of the commit logs in a given format,
701           where <format> can be one of oneline, short, medium, full, fuller,
702           email, raw, format:<string> and tformat:<string>. When <format> is
703           none of the above, and has %placeholder in it, it acts as if
704           --pretty=tformat:<format> were given.
705
706           See the "PRETTY FORMATS" section for some additional details for
707           each format. When =<format> part is omitted, it defaults to medium.
708
709           Note: you can specify the default pretty format in the repository
710           configuration (see git-config(1)).
711
712       --abbrev-commit
713           Instead of showing the full 40-byte hexadecimal commit object name,
714           show only a partial prefix. Non default number of digits can be
715           specified with "--abbrev=<n>" (which also modifies diff output, if
716           it is displayed).
717
718           This should make "--pretty=oneline" a whole lot more readable for
719           people using 80-column terminals.
720
721       --no-abbrev-commit
722           Show the full 40-byte hexadecimal commit object name. This negates
723           --abbrev-commit and those options which imply it such as
724           "--oneline". It also overrides the log.abbrevCommit variable.
725
726       --oneline
727           This is a shorthand for "--pretty=oneline --abbrev-commit" used
728           together.
729
730       --encoding=<encoding>
731           The commit objects record the encoding used for the log message in
732           their encoding header; this option can be used to tell the command
733           to re-code the commit log message in the encoding preferred by the
734           user. For non plumbing commands this defaults to UTF-8. Note that
735           if an object claims to be encoded in X and we are outputting in X,
736           we will output the object verbatim; this means that invalid
737           sequences in the original commit may be copied to the output.
738
739       --expand-tabs=<n>, --expand-tabs, --no-expand-tabs
740           Perform a tab expansion (replace each tab with enough spaces to
741           fill to the next display column that is multiple of <n>) in the log
742           message before showing it in the output.  --expand-tabs is a
743           short-hand for --expand-tabs=8, and --no-expand-tabs is a
744           short-hand for --expand-tabs=0, which disables tab expansion.
745
746           By default, tabs are expanded in pretty formats that indent the log
747           message by 4 spaces (i.e.  medium, which is the default, full, and
748           fuller).
749
750       --notes[=<treeish>]
751           Show the notes (see git-notes(1)) that annotate the commit, when
752           showing the commit log message. This is the default for git log,
753           git show and git whatchanged commands when there is no --pretty,
754           --format, or --oneline option given on the command line.
755
756           By default, the notes shown are from the notes refs listed in the
757           core.notesRef and notes.displayRef variables (or corresponding
758           environment overrides). See git-config(1) for more details.
759
760           With an optional <treeish> argument, use the treeish to find the
761           notes to display. The treeish can specify the full refname when it
762           begins with refs/notes/; when it begins with notes/, refs/ and
763           otherwise refs/notes/ is prefixed to form a full name of the ref.
764
765           Multiple --notes options can be combined to control which notes are
766           being displayed. Examples: "--notes=foo" will show only notes from
767           "refs/notes/foo"; "--notes=foo --notes" will show both notes from
768           "refs/notes/foo" and from the default notes ref(s).
769
770       --no-notes
771           Do not show notes. This negates the above --notes option, by
772           resetting the list of notes refs from which notes are shown.
773           Options are parsed in the order given on the command line, so e.g.
774           "--notes --notes=foo --no-notes --notes=bar" will only show notes
775           from "refs/notes/bar".
776
777       --show-notes[=<treeish>], --[no-]standard-notes
778           These options are deprecated. Use the above --notes/--no-notes
779           options instead.
780
781       --show-signature
782           Check the validity of a signed commit object by passing the
783           signature to gpg --verify and show the output.
784
785       --no-commit-id
786           git diff-tree outputs a line with the commit ID when applicable.
787           This flag suppressed the commit ID output.
788
789       -c
790           This flag changes the way a merge commit is displayed (which means
791           it is useful only when the command is given one <tree-ish>, or
792           --stdin). It shows the differences from each of the parents to the
793           merge result simultaneously instead of showing pairwise diff
794           between a parent and the result one at a time (which is what the -m
795           option does). Furthermore, it lists only files which were modified
796           from all parents.
797
798       --cc
799           This flag changes the way a merge commit patch is displayed, in a
800           similar way to the -c option. It implies the -c and -p options and
801           further compresses the patch output by omitting uninteresting hunks
802           whose the contents in the parents have only two variants and the
803           merge result picks one of them without modification. When all hunks
804           are uninteresting, the commit itself and the commit log message is
805           not shown, just like in any other "empty diff" case.
806
807       --always
808           Show the commit itself and the commit log message even if the diff
809           itself is empty.
810

PRETTY FORMATS

812       If the commit is a merge, and if the pretty-format is not oneline,
813       email or raw, an additional line is inserted before the Author: line.
814       This line begins with "Merge: " and the sha1s of ancestral commits are
815       printed, separated by spaces. Note that the listed commits may not
816       necessarily be the list of the direct parent commits if you have
817       limited your view of history: for example, if you are only interested
818       in changes related to a certain directory or file.
819
820       There are several built-in formats, and you can define additional
821       formats by setting a pretty.<name> config option to either another
822       format name, or a format: string, as described below (see git-
823       config(1)). Here are the details of the built-in formats:
824
825       ·   oneline
826
827               <sha1> <title line>
828
829           This is designed to be as compact as possible.
830
831       ·   short
832
833               commit <sha1>
834               Author: <author>
835
836               <title line>
837
838       ·   medium
839
840               commit <sha1>
841               Author: <author>
842               Date:   <author date>
843
844               <title line>
845
846               <full commit message>
847
848       ·   full
849
850               commit <sha1>
851               Author: <author>
852               Commit: <committer>
853
854               <title line>
855
856               <full commit message>
857
858       ·   fuller
859
860               commit <sha1>
861               Author:     <author>
862               AuthorDate: <author date>
863               Commit:     <committer>
864               CommitDate: <committer date>
865
866               <title line>
867
868               <full commit message>
869
870       ·   email
871
872               From <sha1> <date>
873               From: <author>
874               Date: <author date>
875               Subject: [PATCH] <title line>
876
877               <full commit message>
878
879       ·   raw
880
881           The raw format shows the entire commit exactly as stored in the
882           commit object. Notably, the SHA-1s are displayed in full,
883           regardless of whether --abbrev or --no-abbrev are used, and parents
884           information show the true parent commits, without taking grafts or
885           history simplification into account. Note that this format affects
886           the way commits are displayed, but not the way the diff is shown
887           e.g. with git log --raw. To get full object names in a raw diff
888           format, use --no-abbrev.
889
890       ·   format:<string>
891
892           The format:<string> format allows you to specify which information
893           you want to show. It works a little bit like printf format, with
894           the notable exception that you get a newline with %n instead of \n.
895
896           E.g, format:"The author of %h was %an, %ar%nThe title was >>%s<<%n"
897           would show something like this:
898
899               The author of fe6e0ee was Junio C Hamano, 23 hours ago
900               The title was >>t4119: test autocomputing -p<n> for traditional diff input.<<
901
902           The placeholders are:
903
904           ·   %H: commit hash
905
906           ·   %h: abbreviated commit hash
907
908           ·   %T: tree hash
909
910           ·   %t: abbreviated tree hash
911
912           ·   %P: parent hashes
913
914           ·   %p: abbreviated parent hashes
915
916           ·   %an: author name
917
918           ·   %aN: author name (respecting .mailmap, see git-shortlog(1) or
919               git-blame(1))
920
921           ·   %ae: author email
922
923           ·   %aE: author email (respecting .mailmap, see git-shortlog(1) or
924               git-blame(1))
925
926           ·   %ad: author date (format respects --date= option)
927
928           ·   %aD: author date, RFC2822 style
929
930           ·   %ar: author date, relative
931
932           ·   %at: author date, UNIX timestamp
933
934           ·   %ai: author date, ISO 8601-like format
935
936           ·   %aI: author date, strict ISO 8601 format
937
938           ·   %cn: committer name
939
940           ·   %cN: committer name (respecting .mailmap, see git-shortlog(1)
941               or git-blame(1))
942
943           ·   %ce: committer email
944
945           ·   %cE: committer email (respecting .mailmap, see git-shortlog(1)
946               or git-blame(1))
947
948           ·   %cd: committer date (format respects --date= option)
949
950           ·   %cD: committer date, RFC2822 style
951
952           ·   %cr: committer date, relative
953
954           ·   %ct: committer date, UNIX timestamp
955
956           ·   %ci: committer date, ISO 8601-like format
957
958           ·   %cI: committer date, strict ISO 8601 format
959
960           ·   %d: ref names, like the --decorate option of git-log(1)
961
962           ·   %D: ref names without the " (", ")" wrapping.
963
964           ·   %S: ref name given on the command line by which the commit was
965               reached (like git log --source), only works with git log
966
967           ·   %e: encoding
968
969           ·   %s: subject
970
971           ·   %f: sanitized subject line, suitable for a filename
972
973           ·   %b: body
974
975           ·   %B: raw body (unwrapped subject and body)
976
977           ·   %N: commit notes
978
979           ·   %GG: raw verification message from GPG for a signed commit
980
981           ·   %G?: show "G" for a good (valid) signature, "B" for a bad
982               signature, "U" for a good signature with unknown validity, "X"
983               for a good signature that has expired, "Y" for a good signature
984               made by an expired key, "R" for a good signature made by a
985               revoked key, "E" if the signature cannot be checked (e.g.
986               missing key) and "N" for no signature
987
988           ·   %GS: show the name of the signer for a signed commit
989
990           ·   %GK: show the key used to sign a signed commit
991
992           ·   %GF: show the fingerprint of the key used to sign a signed
993               commit
994
995           ·   %GP: show the fingerprint of the primary key whose subkey was
996               used to sign a signed commit
997
998           ·   %gD: reflog selector, e.g., refs/stash@{1} or refs/stash@{2
999               minutes ago}; the format follows the rules described for the -g
1000               option. The portion before the @ is the refname as given on the
1001               command line (so git log -g refs/heads/master would yield
1002               refs/heads/master@{0}).
1003
1004           ·   %gd: shortened reflog selector; same as %gD, but the refname
1005               portion is shortened for human readability (so
1006               refs/heads/master becomes just master).
1007
1008           ·   %gn: reflog identity name
1009
1010           ·   %gN: reflog identity name (respecting .mailmap, see git-
1011               shortlog(1) or git-blame(1))
1012
1013           ·   %ge: reflog identity email
1014
1015           ·   %gE: reflog identity email (respecting .mailmap, see git-
1016               shortlog(1) or git-blame(1))
1017
1018           ·   %gs: reflog subject
1019
1020           ·   %Cred: switch color to red
1021
1022           ·   %Cgreen: switch color to green
1023
1024           ·   %Cblue: switch color to blue
1025
1026           ·   %Creset: reset color
1027
1028           ·   %C(...): color specification, as described under Values in the
1029               "CONFIGURATION FILE" section of git-config(1). By default,
1030               colors are shown only when enabled for log output (by
1031               color.diff, color.ui, or --color, and respecting the auto
1032               settings of the former if we are going to a terminal).
1033               %C(auto,...)  is accepted as a historical synonym for the
1034               default (e.g., %C(auto,red)). Specifying %C(always,...)  will
1035               show the colors even when color is not otherwise enabled
1036               (though consider just using --color=always to enable color for
1037               the whole output, including this format and anything else git
1038               might color).  auto alone (i.e.  %C(auto)) will turn on auto
1039               coloring on the next placeholders until the color is switched
1040               again.
1041
1042           ·   %m: left (<), right (>) or boundary (-) mark
1043
1044           ·   %n: newline
1045
1046           ·   %%: a raw %
1047
1048           ·   %x00: print a byte from a hex code
1049
1050           ·   %w([<w>[,<i1>[,<i2>]]]): switch line wrapping, like the -w
1051               option of git-shortlog(1).
1052
1053           ·   %<(<N>[,trunc|ltrunc|mtrunc]): make the next placeholder take
1054               at least N columns, padding spaces on the right if necessary.
1055               Optionally truncate at the beginning (ltrunc), the middle
1056               (mtrunc) or the end (trunc) if the output is longer than N
1057               columns. Note that truncating only works correctly with N >= 2.
1058
1059           ·   %<|(<N>): make the next placeholder take at least until Nth
1060               columns, padding spaces on the right if necessary
1061
1062           ·   %>(<N>), %>|(<N>): similar to %<(<N>), %<|(<N>) respectively,
1063               but padding spaces on the left
1064
1065           ·   %>>(<N>), %>>|(<N>): similar to %>(<N>), %>|(<N>) respectively,
1066               except that if the next placeholder takes more spaces than
1067               given and there are spaces on its left, use those spaces
1068
1069           ·   %><(<N>), %><|(<N>): similar to %<(<N>), %<|(<N>) respectively,
1070               but padding both sides (i.e. the text is centered)
1071
1072           ·   %(trailers[:options]): display the trailers of the body as
1073               interpreted by git-interpret-trailers(1). The trailers string
1074               may be followed by a colon and zero or more comma-separated
1075               options. If the only option is given, omit non-trailer lines
1076               from the trailer block. If the unfold option is given, behave
1077               as if interpret-trailer’s --unfold option was given. E.g.,
1078               %(trailers:only,unfold) to do both.
1079
1080           Note
1081           Some placeholders may depend on other options given to the revision
1082           traversal engine. For example, the %g* reflog options will insert
1083           an empty string unless we are traversing reflog entries (e.g., by
1084           git log -g). The %d and %D placeholders will use the "short"
1085           decoration format if --decorate was not already provided on the
1086           command line.
1087
1088       If you add a + (plus sign) after % of a placeholder, a line-feed is
1089       inserted immediately before the expansion if and only if the
1090       placeholder expands to a non-empty string.
1091
1092       If you add a - (minus sign) after % of a placeholder, all consecutive
1093       line-feeds immediately preceding the expansion are deleted if and only
1094       if the placeholder expands to an empty string.
1095
1096       If you add a ` ` (space) after % of a placeholder, a space is inserted
1097       immediately before the expansion if and only if the placeholder expands
1098       to a non-empty string.
1099
1100       ·   tformat:
1101
1102           The tformat: format works exactly like format:, except that it
1103           provides "terminator" semantics instead of "separator" semantics.
1104           In other words, each commit has the message terminator character
1105           (usually a newline) appended, rather than a separator placed
1106           between entries. This means that the final entry of a single-line
1107           format will be properly terminated with a new line, just as the
1108           "oneline" format does. For example:
1109
1110               $ git log -2 --pretty=format:%h 4da45bef \
1111                 | perl -pe '$_ .= " -- NO NEWLINE\n" unless /\n/'
1112               4da45be
1113               7134973 -- NO NEWLINE
1114
1115               $ git log -2 --pretty=tformat:%h 4da45bef \
1116                 | perl -pe '$_ .= " -- NO NEWLINE\n" unless /\n/'
1117               4da45be
1118               7134973
1119
1120           In addition, any unrecognized string that has a % in it is
1121           interpreted as if it has tformat: in front of it. For example,
1122           these two are equivalent:
1123
1124               $ git log -2 --pretty=tformat:%h 4da45bef
1125               $ git log -2 --pretty=%h 4da45bef
1126
1127

RAW OUTPUT FORMAT

1129       The raw output format from "git-diff-index", "git-diff-tree",
1130       "git-diff-files" and "git diff --raw" are very similar.
1131
1132       These commands all compare two sets of things; what is compared
1133       differs:
1134
1135       git-diff-index <tree-ish>
1136           compares the <tree-ish> and the files on the filesystem.
1137
1138       git-diff-index --cached <tree-ish>
1139           compares the <tree-ish> and the index.
1140
1141       git-diff-tree [-r] <tree-ish-1> <tree-ish-2> [<pattern>...]
1142           compares the trees named by the two arguments.
1143
1144       git-diff-files [<pattern>...]
1145           compares the index and the files on the filesystem.
1146
1147       The "git-diff-tree" command begins its output by printing the hash of
1148       what is being compared. After that, all the commands print one output
1149       line per changed file.
1150
1151       An output line is formatted this way:
1152
1153           in-place edit  :100644 100644 bcd1234 0123456 M file0
1154           copy-edit      :100644 100644 abcd123 1234567 C68 file1 file2
1155           rename-edit    :100644 100644 abcd123 1234567 R86 file1 file3
1156           create         :000000 100644 0000000 1234567 A file4
1157           delete         :100644 000000 1234567 0000000 D file5
1158           unmerged       :000000 000000 0000000 0000000 U file6
1159
1160
1161       That is, from the left to the right:
1162
1163        1. a colon.
1164
1165        2. mode for "src"; 000000 if creation or unmerged.
1166
1167        3. a space.
1168
1169        4. mode for "dst"; 000000 if deletion or unmerged.
1170
1171        5. a space.
1172
1173        6. sha1 for "src"; 0{40} if creation or unmerged.
1174
1175        7. a space.
1176
1177        8. sha1 for "dst"; 0{40} if creation, unmerged or "look at work tree".
1178
1179        9. a space.
1180
1181       10. status, followed by optional "score" number.
1182
1183       11. a tab or a NUL when -z option is used.
1184
1185       12. path for "src"
1186
1187       13. a tab or a NUL when -z option is used; only exists for C or R.
1188
1189       14. path for "dst"; only exists for C or R.
1190
1191       15. an LF or a NUL when -z option is used, to terminate the record.
1192
1193       Possible status letters are:
1194
1195       ·   A: addition of a file
1196
1197       ·   C: copy of a file into a new one
1198
1199       ·   D: deletion of a file
1200
1201       ·   M: modification of the contents or mode of a file
1202
1203       ·   R: renaming of a file
1204
1205       ·   T: change in the type of the file
1206
1207       ·   U: file is unmerged (you must complete the merge before it can be
1208           committed)
1209
1210       ·   X: "unknown" change type (most probably a bug, please report it)
1211
1212       Status letters C and R are always followed by a score (denoting the
1213       percentage of similarity between the source and target of the move or
1214       copy). Status letter M may be followed by a score (denoting the
1215       percentage of dissimilarity) for file rewrites.
1216
1217       <sha1> is shown as all 0’s if a file is new on the filesystem and it is
1218       out of sync with the index.
1219
1220       Example:
1221
1222           :100644 100644 5be4a4a 0000000 M file.c
1223
1224
1225       Without the -z option, pathnames with "unusual" characters are quoted
1226       as explained for the configuration variable core.quotePath (see git-
1227       config(1)). Using -z the filename is output verbatim and the line is
1228       terminated by a NUL byte.
1229

DIFF FORMAT FOR MERGES

1231       "git-diff-tree", "git-diff-files" and "git-diff --raw" can take -c or
1232       --cc option to generate diff output also for merge commits. The output
1233       differs from the format described above in the following way:
1234
1235        1. there is a colon for each parent
1236
1237        2. there are more "src" modes and "src" sha1
1238
1239        3. status is concatenated status characters for each parent
1240
1241        4. no optional "score" number
1242
1243        5. single path, only for "dst"
1244
1245       Example:
1246
1247           ::100644 100644 100644 fabadb8 cc95eb0 4866510 MM       describe.c
1248
1249
1250       Note that combined diff lists only files which were modified from all
1251       parents.
1252

GENERATING PATCHES WITH -P

1254       When "git-diff-index", "git-diff-tree", or "git-diff-files" are run
1255       with a -p option, "git diff" without the --raw option, or "git log"
1256       with the "-p" option, they do not produce the output described above;
1257       instead they produce a patch file. You can customize the creation of
1258       such patches via the GIT_EXTERNAL_DIFF and the GIT_DIFF_OPTS
1259       environment variables.
1260
1261       What the -p option produces is slightly different from the traditional
1262       diff format:
1263
1264        1. It is preceded with a "git diff" header that looks like this:
1265
1266               diff --git a/file1 b/file2
1267
1268           The a/ and b/ filenames are the same unless rename/copy is
1269           involved. Especially, even for a creation or a deletion, /dev/null
1270           is not used in place of the a/ or b/ filenames.
1271
1272           When rename/copy is involved, file1 and file2 show the name of the
1273           source file of the rename/copy and the name of the file that
1274           rename/copy produces, respectively.
1275
1276        2. It is followed by one or more extended header lines:
1277
1278               old mode <mode>
1279               new mode <mode>
1280               deleted file mode <mode>
1281               new file mode <mode>
1282               copy from <path>
1283               copy to <path>
1284               rename from <path>
1285               rename to <path>
1286               similarity index <number>
1287               dissimilarity index <number>
1288               index <hash>..<hash> <mode>
1289
1290           File modes are printed as 6-digit octal numbers including the file
1291           type and file permission bits.
1292
1293           Path names in extended headers do not include the a/ and b/
1294           prefixes.
1295
1296           The similarity index is the percentage of unchanged lines, and the
1297           dissimilarity index is the percentage of changed lines. It is a
1298           rounded down integer, followed by a percent sign. The similarity
1299           index value of 100% is thus reserved for two equal files, while
1300           100% dissimilarity means that no line from the old file made it
1301           into the new one.
1302
1303           The index line includes the SHA-1 checksum before and after the
1304           change. The <mode> is included if the file mode does not change;
1305           otherwise, separate lines indicate the old and the new mode.
1306
1307        3. Pathnames with "unusual" characters are quoted as explained for the
1308           configuration variable core.quotePath (see git-config(1)).
1309
1310        4. All the file1 files in the output refer to files before the commit,
1311           and all the file2 files refer to files after the commit. It is
1312           incorrect to apply each change to each file sequentially. For
1313           example, this patch will swap a and b:
1314
1315               diff --git a/a b/b
1316               rename from a
1317               rename to b
1318               diff --git a/b b/a
1319               rename from b
1320               rename to a
1321

COMBINED DIFF FORMAT

1323       Any diff-generating command can take the -c or --cc option to produce a
1324       combined diff when showing a merge. This is the default format when
1325       showing merges with git-diff(1) or git-show(1). Note also that you can
1326       give the -m option to any of these commands to force generation of
1327       diffs with individual parents of a merge.
1328
1329       A combined diff format looks like this:
1330
1331           diff --combined describe.c
1332           index fabadb8,cc95eb0..4866510
1333           --- a/describe.c
1334           +++ b/describe.c
1335           @@@ -98,20 -98,12 +98,20 @@@
1336                   return (a_date > b_date) ? -1 : (a_date == b_date) ? 0 : 1;
1337             }
1338
1339           - static void describe(char *arg)
1340            -static void describe(struct commit *cmit, int last_one)
1341           ++static void describe(char *arg, int last_one)
1342             {
1343            +      unsigned char sha1[20];
1344            +      struct commit *cmit;
1345                   struct commit_list *list;
1346                   static int initialized = 0;
1347                   struct commit_name *n;
1348
1349            +      if (get_sha1(arg, sha1) < 0)
1350            +              usage(describe_usage);
1351            +      cmit = lookup_commit_reference(sha1);
1352            +      if (!cmit)
1353            +              usage(describe_usage);
1354            +
1355                   if (!initialized) {
1356                           initialized = 1;
1357                           for_each_ref(get_name);
1358
1359
1360
1361        1. It is preceded with a "git diff" header, that looks like this (when
1362           -c option is used):
1363
1364               diff --combined file
1365
1366           or like this (when --cc option is used):
1367
1368               diff --cc file
1369
1370        2. It is followed by one or more extended header lines (this example
1371           shows a merge with two parents):
1372
1373               index <hash>,<hash>..<hash>
1374               mode <mode>,<mode>..<mode>
1375               new file mode <mode>
1376               deleted file mode <mode>,<mode>
1377
1378           The mode <mode>,<mode>..<mode> line appears only if at least one of
1379           the <mode> is different from the rest. Extended headers with
1380           information about detected contents movement (renames and copying
1381           detection) are designed to work with diff of two <tree-ish> and are
1382           not used by combined diff format.
1383
1384        3. It is followed by two-line from-file/to-file header
1385
1386               --- a/file
1387               +++ b/file
1388
1389           Similar to two-line header for traditional unified diff format,
1390           /dev/null is used to signal created or deleted files.
1391
1392        4. Chunk header format is modified to prevent people from accidentally
1393           feeding it to patch -p1. Combined diff format was created for
1394           review of merge commit changes, and was not meant for apply. The
1395           change is similar to the change in the extended index header:
1396
1397               @@@ <from-file-range> <from-file-range> <to-file-range> @@@
1398
1399           There are (number of parents + 1) @ characters in the chunk header
1400           for combined diff format.
1401
1402       Unlike the traditional unified diff format, which shows two files A and
1403       B with a single column that has - (minus — appears in A but removed in
1404       B), + (plus — missing in A but added to B), or " " (space — unchanged)
1405       prefix, this format compares two or more files file1, file2,... with
1406       one file X, and shows how X differs from each of fileN. One column for
1407       each of fileN is prepended to the output line to note how X’s line is
1408       different from it.
1409
1410       A - character in the column N means that the line appears in fileN but
1411       it does not appear in the result. A + character in the column N means
1412       that the line appears in the result, and fileN does not have that line
1413       (in other words, the line was added, from the point of view of that
1414       parent).
1415
1416       In the above example output, the function signature was changed from
1417       both files (hence two - removals from both file1 and file2, plus ++ to
1418       mean one line that was added does not appear in either file1 or file2).
1419       Also eight other lines are the same from file1 but do not appear in
1420       file2 (hence prefixed with +).
1421
1422       When shown by git diff-tree -c, it compares the parents of a merge
1423       commit with the merge result (i.e. file1..fileN are the parents). When
1424       shown by git diff-files -c, it compares the two unresolved merge
1425       parents with the working tree file (i.e. file1 is stage 2 aka "our
1426       version", file2 is stage 3 aka "their version").
1427

OTHER DIFF FORMATS

1429       The --summary option describes newly added, deleted, renamed and copied
1430       files. The --stat option adds diffstat(1) graph to the output. These
1431       options can be combined with other options, such as -p, and are meant
1432       for human consumption.
1433
1434       When showing a change that involves a rename or a copy, --stat output
1435       formats the pathnames compactly by combining common prefix and suffix
1436       of the pathnames. For example, a change that moves arch/i386/Makefile
1437       to arch/x86/Makefile while modifying 4 lines will be shown like this:
1438
1439           arch/{i386 => x86}/Makefile    |   4 +--
1440
1441
1442       The --numstat option gives the diffstat(1) information but is designed
1443       for easier machine consumption. An entry in --numstat output looks like
1444       this:
1445
1446           1       2       README
1447           3       1       arch/{i386 => x86}/Makefile
1448
1449
1450       That is, from left to right:
1451
1452        1. the number of added lines;
1453
1454        2. a tab;
1455
1456        3. the number of deleted lines;
1457
1458        4. a tab;
1459
1460        5. pathname (possibly with rename/copy information);
1461
1462        6. a newline.
1463
1464       When -z output option is in effect, the output is formatted this way:
1465
1466           1       2       README NUL
1467           3       1       NUL arch/i386/Makefile NUL arch/x86/Makefile NUL
1468
1469
1470       That is:
1471
1472        1. the number of added lines;
1473
1474        2. a tab;
1475
1476        3. the number of deleted lines;
1477
1478        4. a tab;
1479
1480        5. a NUL (only exists if renamed/copied);
1481
1482        6. pathname in preimage;
1483
1484        7. a NUL (only exists if renamed/copied);
1485
1486        8. pathname in postimage (only exists if renamed/copied);
1487
1488        9. a NUL.
1489
1490       The extra NUL before the preimage path in renamed case is to allow
1491       scripts that read the output to tell if the current record being read
1492       is a single-path record or a rename/copy record without reading ahead.
1493       After reading added and deleted lines, reading up to NUL would yield
1494       the pathname, but if that is NUL, the record will show two paths.
1495

GIT

1497       Part of the git(1) suite
1498
1499
1500
1501Git 2.21.0                        02/24/2019                  GIT-DIFF-TREE(1)
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