Editing Git diff-tree --help

<pre>NAME
       git-diff-tree - Compares the content and mode of blobs found via two tree objects

SYNOPSIS
       git diff-tree [--stdin] [-m] [-s] [-v] [--no-commit-id] [--pretty]
                     [-t] [-r] [-c | --cc] [--combined-all-paths] [--root] [--merge-base]
                     [<common-diff-options>] <tree-ish> [<tree-ish>] [<path>...]

DESCRIPTION
       Compares the content and mode of the blobs found via two tree objects.

       If there is only one <tree-ish> given, the commit is compared with its parents (see
       --stdin below).

       Note that git diff-tree can use the tree encapsulated in a commit object.

OPTIONS
       -p, -u, --patch
           Generate patch (see section on generating patches).

       -s, --no-patch
           Suppress diff output. Useful for commands like git show that show the patch by
           default, or to cancel the effect of --patch.

       -U<n>, --unified=<n>
           Generate diffs with <n> lines of context instead of the usual three. Implies
           --patch.

       --output=<file>
           Output to a specific file instead of stdout.

       --output-indicator-new=<char>, --output-indicator-old=<char>,
       --output-indicator-context=<char>
           Specify the character used to indicate new, old or context lines in the generated
           patch. Normally they are +, - and ' ' respectively.

       --raw
           Generate the diff in raw format. This is the default.

       --patch-with-raw
           Synonym for -p --raw.

       --indent-heuristic
           Enable the heuristic that shifts diff hunk boundaries to make patches easier to
           read. This is the default.

       --no-indent-heuristic
           Disable the indent heuristic.

       --minimal
           Spend extra time to make sure the smallest possible diff is produced.

       --patience
           Generate a diff using the "patience diff" algorithm.

       --histogram
           Generate a diff using the "histogram diff" algorithm.

       --anchored=<text>
           Generate a diff using the "anchored diff" algorithm.
This option may be specified more than once.

           If a line exists in both the source and destination, exists only once, and starts
           with this text, this algorithm attempts to prevent it from appearing as a deletion
           or addition in the output. It uses the "patience diff" algorithm internally.

       --diff-algorithm={patience|minimal|histogram|myers}
           Choose a diff algorithm. The variants are as follows:

           default, myers
               The basic greedy diff algorithm. Currently, this is the default.

           minimal
               Spend extra time to make sure the smallest possible diff is produced.

           patience
               Use "patience diff" algorithm when generating patches.

           histogram
               This algorithm extends the patience algorithm to "support low-occurrence common
               elements".

           For instance, if you configured the diff.algorithm variable to a non-default value
           and want to use the default one, then you have to use --diff-algorithm=default
           option.

       --stat[=<width>[,<name-width>[,<count>]]]
           Generate a diffstat. By default, as much space as necessary will be used for the
           filename part, and the rest for the graph part. Maximum width defaults to terminal
           width, or 80 columns if not connected to a terminal, and can be overridden by
           <width>. The width of the filename part can be limited by giving another width
           <name-width> after a comma. The width of the graph part can be limited by using
           --stat-graph-width=<width> (affects all commands generating a stat graph) or by
           setting diff.statGraphWidth=<width> (does not affect git format-patch). By giving a
           third parameter <count>, you can limit the output to the first <count> lines,
           followed by ... if there are more.

           These parameters can also be set individually with --stat-width=<width>,
           --stat-name-width=<name-width> and --stat-count=<count>.

       --compact-summary
           Output a condensed summary of extended header information such as file creations or
           deletions ("new" or "gone", optionally "+l" if it’s a symlink) and mode changes
           ("+x" or "-x" for adding or removing executable bit respectively) in diffstat. The
           information is put between the filename part and the graph part. Implies --stat.

       --numstat
           Similar to --stat, but shows number of added and deleted lines in decimal notation
           and pathname without abbreviation, to make it more machine friendly. For binary
           files, outputs two - instead of saying 0 0.

       --shortstat
           Output only the last line of the --stat format containing total number of modified
           files, as well as number of added and deleted lines.

       -X[<param1,param2,...>], --dirstat[=<param1,param2,...>]
           Output the distribution of relative amount of changes for each sub-directory. The
           behavior of --dirstat can be customized by passing it a comma separated list of
           parameters. The defaults are controlled by the diff.dirstat configuration variable:
(see git-config(1)). The following parameters are available:

           changes
               Compute the dirstat numbers by counting the lines that have been removed from
               the source, or added to the destination. This ignores the amount of pure code
               movements within a file. In other words, rearranging lines in a file is not
               counted as much as other changes. This is the default behavior when no parameter
               is given.

           lines
               Compute the dirstat numbers by doing the regular line-based diff analysis, and
               summing the removed/added line counts. (For binary files, count 64-byte chunks
               instead, since binary files have no natural concept of lines). This is a more
               expensive --dirstat behavior than the changes behavior, but it does count
               rearranged lines within a file as much as other changes. The resulting output is
               consistent with what you get from the other --*stat options.

           files
               Compute the dirstat numbers by counting the number of files changed. Each
               changed file counts equally in the dirstat analysis. This is the computationally
               cheapest --dirstat behavior, since it does not have to look at the file contents
               at all.

           cumulative
               Count changes in a child directory for the parent directory as well. Note that
               when using cumulative, the sum of the percentages reported may exceed 100%. The
               default (non-cumulative) behavior can be specified with the noncumulative
               parameter.

           <limit>
               An integer parameter specifies a cut-off percent (3% by default). Directories
               contributing less than this percentage of the changes are not shown in the
               output.

           Example: The following will count changed files, while ignoring directories with
           less than 10% of the total amount of changed files, and accumulating child directory
           counts in the parent directories: --dirstat=files,10,cumulative.

       --cumulative
           Synonym for --dirstat=cumulative

       --dirstat-by-file[=<param1,param2>...]
           Synonym for --dirstat=files,param1,param2...

       --summary
           Output a condensed summary of extended header information such as creations, renames
           and mode changes.

       --patch-with-stat
           Synonym for -p --stat.

       -z
When --raw, --numstat, --name-only or --name-status has been given, do not munge
           pathnames and use NULs as output field terminators.

           Without this option, pathnames with "unusual" characters are quoted as explained for
           the configuration variable core.quotePath (see git-config(1)).

       --name-only
           Show only names of changed files. The file names are often encoded in UTF-8. For
           more information see the discussion about encoding in the git-log(1) manual page.

       --name-status
           Show only names and status of changed files. See the description of the
           --diff-filter option on what the status letters mean. Just like --name-only the file
           names are often encoded in UTF-8.

       --submodule[=<format>]
           Specify how differences in submodules are shown. When specifying --submodule=short
           the short format is used. This format just shows the names of the commits at the
           beginning and end of the range. When --submodule or --submodule=log is specified,
           the log format is used. This format lists the commits in the range like git-
           submodule(1) summary does. When --submodule=diff is specified, the diff format is
           used. This format shows an inline diff of the changes in the submodule contents
           between the commit range. Defaults to diff.submodule or the short format if the
           config option is unset.

       --color[=<when>]
           Show colored diff.  --color (i.e. without =<when>) is the same as --color=always.
           <when> can be one of always, never, or auto.

       --no-color
           Turn off colored diff. It is the same as --color=never.

       --color-moved[=<mode>]
           Moved lines of code are colored differently. The <mode> defaults to no if the option
           is not given and to zebra if the option with no mode is given. The mode must be one
           of:

           no
               Moved lines are not highlighted.

           default
               Is a synonym for zebra. This may change to a more sensible mode in the future.

           plain
               Any line that is added in one location and was removed in another location will
               be colored with color.diff.newMoved. Similarly color.diff.oldMoved will be used
               for removed lines that are added somewhere else in the diff. This mode picks up
               any moved line, but it is not very useful in a review to determine if a block of
               code was moved without permutation.

           blocks
               Blocks of moved text of at least 20 alphanumeric characters are detected
               greedily. The detected blocks are painted using either the
               color.diff.{old,new}Moved color. Adjacent blocks cannot be told apart.

           zebra
               Blocks of moved text are detected as in blocks mode. The blocks are painted
               using either the color.diff.{old,new}Moved color or
 color.diff.{old,new}MovedAlternative. The change between the two colors
               indicates that a new block was detected.

           dimmed-zebra
               Similar to zebra, but additional dimming of uninteresting parts of moved code is
               performed. The bordering lines of two adjacent blocks are considered
               interesting, the rest is uninteresting.  dimmed_zebra is a deprecated synonym.

       --no-color-moved
           Turn off move detection. This can be used to override configuration settings. It is
           the same as --color-moved=no.

       --color-moved-ws=<modes>
           This configures how whitespace is ignored when performing the move detection for
           --color-moved. These modes can be given as a comma separated list:

           no
               Do not ignore whitespace when performing move detection.

           ignore-space-at-eol
               Ignore changes in whitespace at EOL.

           ignore-space-change
               Ignore changes in amount of whitespace. This ignores whitespace at line end, and
               considers all other sequences of one or more whitespace characters to be
               equivalent.

           ignore-all-space
               Ignore whitespace when comparing lines. This ignores differences even if one
               line has whitespace where the other line has none.

           allow-indentation-change
               Initially ignore any whitespace in the move detection, then group the moved code
               blocks only into a block if the change in whitespace is the same per line. This
               is incompatible with the other modes.

       --no-color-moved-ws
           Do not ignore whitespace when performing move detection. This can be used to
           override configuration settings. It is the same as --color-moved-ws=no.

       --word-diff[=<mode>]
           Show a word diff, using the <mode> to delimit changed words. By default, words are
           delimited by whitespace; see --word-diff-regex below. The <mode> defaults to plain,
           and must be one of:

           color
               Highlight changed words using only colors. Implies --color.

           plain
               Show words as [-removed-] and {+added+}. Makes no attempts to escape the
               delimiters if they appear in the input, so the output may be ambiguous.

           porcelain
               Use a special line-based format intended for script consumption.
               Added/removed/unchanged runs are printed in the usual unified diff format,
               starting with a +/-/` ` character at the beginning of the line and extending to
the end of the line. Newlines in the input are represented by a tilde ~ on a
               line of its own.

           none
               Disable word diff again.

           Note that despite the name of the first mode, color is used to highlight the changed
           parts in all modes if enabled.

       --word-diff-regex=<regex>
           Use <regex> to decide what a word is, instead of considering runs of non-whitespace
           to be a word. Also implies --word-diff unless it was already enabled.

           Every non-overlapping match of the <regex> is considered a word. Anything between
           these matches is considered whitespace and ignored(!) for the purposes of finding
           differences. You may want to append |[^[:space:]] to your regular expression to make
           sure that it matches all non-whitespace characters. A match that contains a newline
           is silently truncated(!) at the newline.

           For example, --word-diff-regex=. will treat each character as a word and,
           correspondingly, show differences character by character.

           The regex can also be set via a diff driver or configuration option, see
           gitattributes(5) or git-config(1). Giving it explicitly overrides any diff driver or
           configuration setting. Diff drivers override configuration settings.

       --color-words[=<regex>]
           Equivalent to --word-diff=color plus (if a regex was specified)
           --word-diff-regex=<regex>.

       --no-renames
           Turn off rename detection, even when the configuration file gives the default to do
           so.

       --[no-]rename-empty
           Whether to use empty blobs as rename source.

       --check
           Warn if changes introduce conflict markers or whitespace errors. What are considered
           whitespace errors is controlled by core.whitespace configuration. By default,
           trailing whitespaces (including lines that consist solely of whitespaces) and a
           space character that is immediately followed by a tab character inside the initial
           indent of the line are considered whitespace errors. Exits with non-zero status if
           problems are found. Not compatible with --exit-code.

       --ws-error-highlight=<kind>
           Highlight whitespace errors in the context, old or new lines of the diff. Multiple
           values are separated by comma, none resets previous values, default reset the list
           to new and all is a shorthand for old,new,context. When this option is not given,
           and the configuration variable diff.wsErrorHighlight is not set, only whitespace
           errors in new lines are highlighted. The whitespace errors are colored with
color.diff.whitespace.

       --full-index
           Instead of the first handful of characters, show the full pre- and post-image blob
           object names on the "index" line when generating patch format output.

       --binary
           In addition to --full-index, output a binary diff that can be applied with
           git-apply. Implies --patch.

       --abbrev[=<n>]
           Instead of showing the full 40-byte hexadecimal object name in diff-raw format
           output and diff-tree header lines, show the shortest prefix that is at least <n>
           hexdigits long that uniquely refers the object. In diff-patch output format,
           --full-index takes higher precedence, i.e. if --full-index is specified, full blob
           names will be shown regardless of --abbrev. Non default number of digits can be
           specified with --abbrev=<n>.

       -B[<n>][/<m>], --break-rewrites[=[<n>][/<m>]]
           Break complete rewrite changes into pairs of delete and create. This serves two
           purposes:

           It affects the way a change that amounts to a total rewrite of a file not as a
           series of deletion and insertion mixed together with a very few lines that happen to
           match textually as the context, but as a single deletion of everything old followed
           by a single insertion of everything new, and the number m controls this aspect of
           the -B option (defaults to 60%).  -B/70% specifies that less than 30% of the
           original should remain in the result for Git to consider it a total rewrite (i.e.
           otherwise the resulting patch will be a series of deletion and insertion mixed
           together with context lines).

           When used with -M, a totally-rewritten file is also considered as the source of a
           rename (usually -M only considers a file that disappeared as the source of a
           rename), and the number n controls this aspect of the -B option (defaults to 50%).
           -B20% specifies that a change with addition and deletion compared to 20% or more of
           the file’s size are eligible for being picked up as a possible source of a rename to
           another file.

       -M[<n>], --find-renames[=<n>]
           Detect renames. If n is specified, it is a threshold on the similarity index (i.e.
           amount of addition/deletions compared to the file’s size). For example, -M90% means
           Git should consider a delete/add pair to be a rename if more than 90% of the file
           hasn’t changed. Without a % sign, the number is to be read as a fraction, with a
           decimal point before it. I.e., -M5 becomes 0.5, and is thus the same as -M50%.
           Similarly, -M05 is the same as -M5%. To limit detection to exact renames, use
           -M100%. The default similarity index is 50%.

       -C[<n>], --find-copies[=<n>]
           Detect copies as well as renames. See also --find-copies-harder. If n is specified,
           it has the same meaning as for -M<n>.

       --find-copies-harder
           For performance reasons, by default, -C option finds copies only if the original
           file of the copy was modified in the same changeset. This flag makes the command
           inspect unmodified files as candidates for the source of copy. This is a very
           expensive operation for large projects, so use it with caution. Giving more than one
-C option has the same effect.

       -D, --irreversible-delete
           Omit the preimage for deletes, i.e. print only the header but not the diff between
           the preimage and /dev/null. The resulting patch is not meant to be applied with
           patch or git apply; this is solely for people who want to just concentrate on
           reviewing the text after the change. In addition, the output obviously lacks enough
           information to apply such a patch in reverse, even manually, hence the name of the
           option.

           When used together with -B, omit also the preimage in the deletion part of a
           delete/create pair.

       -l<num>
           The -M and -C options involve some preliminary steps that can detect subsets of
           renames/copies cheaply, followed by an exhaustive fallback portion that compares all
           remaining unpaired destinations to all relevant sources. (For renames, only
           remaining unpaired sources are relevant; for copies, all original sources are
           relevant.) For N sources and destinations, this exhaustive check is O(N^2). This
           option prevents the exhaustive portion of rename/copy detection from running if the
           number of source/destination files involved exceeds the specified number. Defaults
           to diff.renameLimit. Note that a value of 0 is treated as unlimited.

       --diff-filter=[(A|C|D|M|R|T|U|X|B)...[*]]
           Select only files that are Added (A), Copied (C), Deleted (D), Modified (M), Renamed
           (R), have their type (i.e. regular file, symlink, submodule, ...) changed (T), are
           Unmerged (U), are Unknown (X), or have had their pairing Broken (B). Any combination
           of the filter characters (including none) can be used. When * (All-or-none) is added
           to the combination, all paths are selected if there is any file that matches other
           criteria in the comparison; if there is no file that matches other criteria, nothing
           is selected.

           Also, these upper-case letters can be downcased to exclude. E.g.  --diff-filter=ad
           excludes added and deleted paths.

           Note that not all diffs can feature all types. For instance, copied and renamed
           entries cannot appear if detection for those types is disabled.

       -S<string>
           Look for differences that change the number of occurrences of the specified string
           (i.e. addition/deletion) in a file. Intended for the scripter’s use.

           It is useful when you’re looking for an exact block of code (like a struct), and
           want to know the history of that block since it first came into being: use the
           feature iteratively to feed the interesting block in the preimage back into -S, and
           keep going until you get the very first version of the block.

           Binary files are searched as well.

       -G<regex>
           Look for differences whose patch text contains added/removed lines that match
           <regex>.

           To illustrate the difference between -S<regex> --pickaxe-regex and -G<regex>,
           consider a commit with the following diff in the same file:
 +    return frotz(nitfol, two->ptr, 1, 0);
               ...
               -    hit = frotz(nitfol, mf2.ptr, 1, 0);

           While git log -G"frotz\(nitfol" will show this commit, git log -S"frotz\(nitfol"
           --pickaxe-regex will not (because the number of occurrences of that string did not
           change).

           Unless --text is supplied patches of binary files without a textconv filter will be
           ignored.

           See the pickaxe entry in gitdiffcore(7) for more information.

       --find-object=<object-id>
           Look for differences that change the number of occurrences of the specified object.
           Similar to -S, just the argument is different in that it doesn’t search for a
           specific string but for a specific object id.

           The object can be a blob or a submodule commit. It implies the -t option in git-log
           to also find trees.

       --pickaxe-all
           When -S or -G finds a change, show all the changes in that changeset, not just the
           files that contain the change in <string>.

       --pickaxe-regex
           Treat the <string> given to -S as an extended POSIX regular expression to match.

       -O<orderfile>
           Control the order in which files appear in the output. This overrides the
           diff.orderFile configuration variable (see git-config(1)). To cancel diff.orderFile,
           use -O/dev/null.

           The output order is determined by the order of glob patterns in <orderfile>. All
           files with pathnames that match the first pattern are output first, all files with
           pathnames that match the second pattern (but not the first) are output next, and so
           on. All files with pathnames that do not match any pattern are output last, as if
           there was an implicit match-all pattern at the end of the file. If multiple
           pathnames have the same rank (they match the same pattern but no earlier patterns),
           their output order relative to each other is the normal order.

           <orderfile> is parsed as follows:

           •   Blank lines are ignored, so they can be used as separators for readability.

           •   Lines starting with a hash ("#") are ignored, so they can be used for comments.
               Add a backslash ("\") to the beginning of the pattern if it starts with a hash.

           •   Each other line contains a single pattern.

           Patterns have the same syntax and semantics as patterns used for fnmatch(3) without
           the FNM_PATHNAME flag, except a pathname also matches a pattern if removing any
           number of the final pathname components matches the pattern. For example, the
           pattern "foo*bar" matches "fooasdfbar" and "foo/bar/baz/asdf" but not "foobarx".
--skip-to=<file>, --rotate-to=<file>
           Discard the files before the named <file> from the output (i.e.  skip to), or move
           them to the end of the output (i.e.  rotate to). These were invented primarily for
           use of the git difftool command, and may not be very useful otherwise.

       -R
           Swap two inputs; that is, show differences from index or on-disk file to tree
           contents.

       --relative[=<path>], --no-relative
           When run from a subdirectory of the project, it can be told to exclude changes
           outside the directory and show pathnames relative to it with this option. When you
           are not in a subdirectory (e.g. in a bare repository), you can name which
           subdirectory to make the output relative to by giving a <path> as an argument.
           --no-relative can be used to countermand both diff.relative config option and
           previous --relative.

       -a, --text
           Treat all files as text.

       --ignore-cr-at-eol
           Ignore carriage-return at the end of line when doing a comparison.

       --ignore-space-at-eol
           Ignore changes in whitespace at EOL.

       -b, --ignore-space-change
           Ignore changes in amount of whitespace. This ignores whitespace at line end, and
           considers all other sequences of one or more whitespace characters to be equivalent.

       -w, --ignore-all-space
           Ignore whitespace when comparing lines. This ignores differences even if one line
           has whitespace where the other line has none.

       --ignore-blank-lines
           Ignore changes whose lines are all blank.

       -I<regex>, --ignore-matching-lines=<regex>
           Ignore changes whose all lines match <regex>. This option may be specified more than
           once.

       --inter-hunk-context=<lines>
           Show the context between diff hunks, up to the specified number of lines, thereby
           fusing hunks that are close to each other. Defaults to diff.interHunkContext or 0 if
           the config option is unset.

       -W, --function-context
           Show whole function as context lines for each change. The function names are
           determined in the same way as git diff works out patch hunk headers (see Defining a
           custom hunk-header in gitattributes(5)).

       --exit-code
           Make the program exit with codes similar to diff(1). That is, it exits with 1 if
 --quiet
           Disable all output of the program. Implies --exit-code.

       --ext-diff
           Allow an external diff helper to be executed. If you set an external diff driver
           with gitattributes(5), you need to use this option with git-log(1) and friends.

       --no-ext-diff
           Disallow external diff drivers.

       --textconv, --no-textconv
           Allow (or disallow) external text conversion filters to be run when comparing binary
           files. See gitattributes(5) for details. Because textconv filters are typically a
           one-way conversion, the resulting diff is suitable for human consumption, but cannot
           be applied. For this reason, textconv filters are enabled by default only for git-
           diff(1) and git-log(1), but not for git-format-patch(1) or diff plumbing commands.

       --ignore-submodules[=<when>]
           Ignore changes to submodules in the diff generation. <when> can be either "none",
           "untracked", "dirty" or "all", which is the default. Using "none" will consider the
           submodule modified when it either contains untracked or modified files or its HEAD
           differs from the commit recorded in the superproject and can be used to override any
           settings of the ignore option in git-config(1) or gitmodules(5). When "untracked" is
           used submodules are not considered dirty when they only contain untracked content
           (but they are still scanned for modified content). Using "dirty" ignores all changes
           to the work tree of submodules, only changes to the commits stored in the
           superproject are shown (this was the behavior until 1.7.0). Using "all" hides all
           changes to submodules.

       --src-prefix=<prefix>
           Show the given source prefix instead of "a/".

       --dst-prefix=<prefix>
           Show the given destination prefix instead of "b/".

       --no-prefix
           Do not show any source or destination prefix.

       --line-prefix=<prefix>
           Prepend an additional prefix to every line of output.

       --ita-invisible-in-index
           By default entries added by "git add -N" appear as an existing empty file in "git
           diff" and a new file in "git diff --cached". This option makes the entry appear as a
           new file in "git diff" and non-existent in "git diff --cached". This option could be
           reverted with --ita-visible-in-index. Both options are experimental and could be
           removed in future.

 For more detailed explanation on these common options, see also gitdiffcore(7).

       <tree-ish>
           The id of a tree object.

       <path>...
           If provided, the results are limited to a subset of files matching one of the
           provided pathspecs.

       -r
           recurse into sub-trees

       -t
           show tree entry itself as well as subtrees. Implies -r.

       --root
           When --root is specified the initial commit will be shown as a big creation event.
           This is equivalent to a diff against the NULL tree.

       --merge-base
           Instead of comparing the <tree-ish>s directly, use the merge base between the two
           <tree-ish>s as the "before" side. There must be two <tree-ish>s given and they must
           both be commits.

       --stdin
           When --stdin is specified, the command does not take <tree-ish> arguments from the
           command line. Instead, it reads lines containing either two <tree>, one <commit>, or
           a list of <commit> from its standard input. (Use a single space as separator.)

           When two trees are given, it compares the first tree with the second. When a single
           commit is given, it compares the commit with its parents. The remaining commits,
           when given, are used as if they are parents of the first commit.

           When comparing two trees, the ID of both trees (separated by a space and terminated
           by a newline) is printed before the difference. When comparing commits, the ID of
           the first (or only) commit, followed by a newline, is printed.

           The following flags further affect the behavior when comparing commits (but not
           trees).
-m
           By default, git diff-tree --stdin does not show differences for merge commits. With
           this flag, it shows differences to that commit from all of its parents. See also -c.

       -s
           By default, git diff-tree --stdin shows differences, either in machine-readable form
           (without -p) or in patch form (with -p). This output can be suppressed. It is only
           useful with -v flag.

       -v
           This flag causes git diff-tree --stdin to also show the commit message before the
           differences.

       --pretty[=<format>], --format=<format>
           Pretty-print the contents of the commit logs in a given format, where <format> can
           be one of oneline, short, medium, full, fuller, reference, email, raw,
           format:<string> and tformat:<string>. When <format> is none of the above, and has
           %placeholder in it, it acts as if --pretty=tformat:<format> were given.

           See the "PRETTY FORMATS" section for some additional details for each format. When
           =<format> part is omitted, it defaults to medium.

           Note: you can specify the default pretty format in the repository configuration (see
           git-config(1)).

       --abbrev-commit
           Instead of showing the full 40-byte hexadecimal commit object name, show a prefix
           that names the object uniquely. "--abbrev=<n>" (which also modifies diff output, if
           it is displayed) option can be used to specify the minimum length of the prefix.

           This should make "--pretty=oneline" a whole lot more readable for people using
           80-column terminals.

       --no-abbrev-commit
           Show the full 40-byte hexadecimal commit object name. This negates --abbrev-commit,
           either explicit or implied by other options such as "--oneline". It also overrides
           the log.abbrevCommit variable.

       --oneline
           This is a shorthand for "--pretty=oneline --abbrev-commit" used together.

       --encoding=<encoding>
           Commit objects record the character encoding used for the log message in their
           encoding header; this option can be used to tell the command to re-code the commit
           log message in the encoding preferred by the user. For non plumbing commands this
           defaults to UTF-8. Note that if an object claims to be encoded in X and we are
           outputting in X, we will output the object verbatim; this means that invalid
           sequences in the original commit may be copied to the output. Likewise, if iconv(3)
           fails to convert the commit, we will quietly output the original object verbatim.

 --expand-tabs=<n>, --expand-tabs, --no-expand-tabs
           Perform a tab expansion (replace each tab with enough spaces to fill to the next display column that is multiple of <n>) in the log message before showing it in the output.  --expand-tabs is
           a short-hand for --expand-tabs=8, and --no-expand-tabs is a short-hand for --expand-tabs=0, which disables tab expansion.

           By default, tabs are expanded in pretty formats that indent the log message by 4 spaces (i.e.  medium, which is the default, full, and fuller).

       --notes[=<ref>]
           Show the notes (see git-notes(1)) that annotate the commit, when showing the commit log message. This is the default for git log, git show and git whatchanged commands when there is no
           --pretty, --format, or --oneline option given on the command line.

           By default, the notes shown are from the notes refs listed in the core.notesRef and notes.displayRef variables (or corresponding environment overrides). See git-config(1) for more details.

           With an optional <ref> argument, use the ref to find the notes to display. The ref can specify the full refname when it begins with refs/notes/; when it begins with notes/, refs/ and
           otherwise refs/notes/ is prefixed to form a full name of the ref.

           Multiple --notes options can be combined to control which notes are being displayed. Examples: "--notes=foo" will show only notes from "refs/notes/foo"; "--notes=foo --notes" will show both
           notes from "refs/notes/foo" and from the default notes ref(s).

       --no-notes
           Do not show notes. This negates the above --notes option, by resetting the list of notes refs from which notes are shown. Options are parsed in the order given on the command line, so e.g.
           "--notes --notes=foo --no-notes --notes=bar" will only show notes from "refs/notes/bar".

       --show-notes[=<ref>], --[no-]standard-notes
           These options are deprecated. Use the above --notes/--no-notes options instead.

       --show-signature
           Check the validity of a signed commit object by passing the signature to gpg --verify and show the output.

       --no-commit-id
           git diff-tree outputs a line with the commit ID when applicable. This flag suppressed the commit ID output.

       -c
           This flag changes the way a merge commit is displayed (which means it is useful only when the command is given one <tree-ish>, or --stdin). It shows the differences from each of the parents
           to the merge result simultaneously instead of showing pairwise diff between a parent and the result one at a time (which is what the -m option does). Furthermore, it lists only files which
           were modified from all parents.

       --cc
           This flag changes the way a merge commit patch is displayed, in a similar way to the -c option. It implies the -c and -p options and further compresses the patch output by omitting
           uninteresting hunks whose the contents in the parents have only two variants and the merge result picks one of them without modification. When all hunks are uninteresting, the commit itself
           and the commit log message is not shown, just like in any other "empty diff" case.

       --combined-all-paths
           This flag causes combined diffs (used for merge commits) to list the name of the file from all parents. It thus only has effect when -c or --cc are specified, and is likely only useful if
           filename changes are detected (i.e. when either rename or copy detection have been requested).

       --always
           Show the commit itself and the commit log message even if the diff itself is empty. </pre>