PRETTY FORMATS
--------------

If the commit is a merge, and if the pretty-format
is not 'oneline', 'email' or 'raw', an additional line is
inserted before the 'Author:' line.  This line begins with
"Merge: " and the sha1s of ancestral commits are printed,
separated by spaces.  Note that the listed commits may not
necessarily be the list of the *direct* parent commits if you
have limited your view of history: for example, if you are
only interested in changes related to a certain directory or
file.

There are several built-in formats, and you can define
additional formats by setting a pretty.<name>
config option to either another format name, or a
'format:' string, as described below (see
linkgit:git-config[1]). Here are the details of the
built-in formats:

* 'oneline'

          <sha1> <title line>
+
This is designed to be as compact as possible.

* 'short'

          commit <sha1>
          Author: <author>

              <title line>

* 'medium'

          commit <sha1>
          Author: <author>
          Date:   <author date>

              <title line>

              <full commit message>

* 'full'

          commit <sha1>
          Author: <author>
          Commit: <committer>

              <title line>

              <full commit message>

* 'fuller'

          commit <sha1>
          Author:     <author>
          AuthorDate: <author date>
          Commit:     <committer>
          CommitDate: <committer date>

               <title line>

               <full commit message>

* 'email'

          From <sha1> <date>
          From: <author>
          Date: <author date>
          Subject: [PATCH] <title line>

          <full commit message>

* 'raw'
+
The 'raw' format shows the entire commit exactly as
stored in the commit object.  Notably, the SHA1s are
displayed in full, regardless of whether --abbrev or
--no-abbrev are used, and 'parents' information show the
true parent commits, without taking grafts nor history
simplification into account.

* 'format:<string>'
+
The 'format:<string>' format allows you to specify which information
you want to show. It works a little bit like printf format,
with the notable exception that you get a newline with '%n'
instead of '\n'.
+
E.g, 'format:"The author of %h was %an, %ar%nThe title was >>%s<<%n"'
would show something like this:
+
-------
The author of fe6e0ee was Junio C Hamano, 23 hours ago
The title was >>t4119: test autocomputing -p<n> for traditional diff input.<<

--------
+
The placeholders are:

- '%H': commit hash
- '%h': abbreviated commit hash
- '%T': tree hash
- '%t': abbreviated tree hash
- '%P': parent hashes
- '%p': abbreviated parent hashes
- '%an': author name
- '%aN': author name (respecting .mailmap, see linkgit:git-shortlog[1] or linkgit:git-blame[1])
- '%ae': author email
- '%aE': author email (respecting .mailmap, see linkgit:git-shortlog[1] or linkgit:git-blame[1])
- '%ad': author date (format respects --date= option)
- '%aD': author date, RFC2822 style
- '%ar': author date, relative
- '%at': author date, UNIX timestamp
- '%ai': author date, ISO 8601 format
- '%cn': committer name
- '%cN': committer name (respecting .mailmap, see linkgit:git-shortlog[1] or linkgit:git-blame[1])
- '%ce': committer email
- '%cE': committer email (respecting .mailmap, see linkgit:git-shortlog[1] or linkgit:git-blame[1])
- '%cd': committer date
- '%cD': committer date, RFC2822 style
- '%cr': committer date, relative
- '%ct': committer date, UNIX timestamp
- '%ci': committer date, ISO 8601 format
- '%d': ref names, like the --decorate option of linkgit:git-log[1]
- '%e': encoding
- '%s': subject
- '%f': sanitized subject line, suitable for a filename
- '%b': body
- '%B': raw body (unwrapped subject and body)
- '%N': commit notes
- '%gD': reflog selector, e.g., `refs/stash@\{1\}`
- '%gd': shortened reflog selector, e.g., `stash@\{1\}`
- '%gs': reflog subject
- '%Cred': switch color to red
- '%Cgreen': switch color to green
- '%Cblue': switch color to blue
- '%Creset': reset color
- '%C(...)': color specification, as described in color.branch.* config option
- '%m': left, right or boundary mark
- '%n': newline
- '%%': a raw '%'
- '%x00': print a byte from a hex code
- '%w([<w>[,<i1>[,<i2>]]])': switch line wrapping, like the -w option of
  linkgit:git-shortlog[1].

NOTE: Some placeholders may depend on other options given to the
revision traversal engine. For example, the `%g*` reflog options will
insert an empty string unless we are traversing reflog entries (e.g., by
`git log -g`). The `%d` placeholder will use the "short" decoration
format if `--decorate` was not already provided on the command line.

If you add a `{plus}` (plus sign) after '%' of a placeholder, a line-feed
is inserted immediately before the expansion if and only if the
placeholder expands to a non-empty string.

If you add a `-` (minus sign) after '%' of a placeholder, line-feeds that
immediately precede the expansion are deleted if and only if the
placeholder expands to an empty string.

* 'tformat:'
+
The 'tformat:' format works exactly like 'format:', except that it
provides "terminator" semantics instead of "separator" semantics. In
other words, each commit has the message terminator character (usually a
newline) appended, rather than a separator placed between entries.
This means that the final entry of a single-line format will be properly
terminated with a new line, just as the "oneline" format does.
For example:
+
---------------------
$ git log -2 --pretty=format:%h 4da45bef \
  | perl -pe '$_ .= " -- NO NEWLINE\n" unless /\n/'
4da45be
7134973 -- NO NEWLINE

$ git log -2 --pretty=tformat:%h 4da45bef \
  | perl -pe '$_ .= " -- NO NEWLINE\n" unless /\n/'
4da45be
7134973
---------------------
+
In addition, any unrecognized string that has a `%` in it is interpreted
as if it has `tformat:` in front of it.  For example, these two are
equivalent:
+
---------------------
$ git log -2 --pretty=tformat:%h 4da45bef
$ git log -2 --pretty=%h 4da45bef
---------------------