git-commit-tree man page on Darwin

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GIT-COMMIT-TREE(1)		  Git Manual		    GIT-COMMIT-TREE(1)

NAME
       git-commit-tree - Create a new commit object

SYNOPSIS
       git commit-tree <tree> [(-p <parent>)...] < changelog
       git commit-tree [(-p <parent>)...] [-S[<keyid>]] [(-m <message>)...]
			 [(-F <file>)...] <tree>

DESCRIPTION
       This is usually not what an end user wants to run directly. See git-
       commit(1) instead.

       Creates a new commit object based on the provided tree object and emits
       the new commit object id on stdout. The log message is read from the
       standard input, unless -m or -F options are given.

       A commit object may have any number of parents. With exactly one
       parent, it is an ordinary commit. Having more than one parent makes the
       commit a merge between several lines of history. Initial (root) commits
       have no parents.

       While a tree represents a particular directory state of a working
       directory, a commit represents that state in "time", and explains how
       to get there.

       Normally a commit would identify a new "HEAD" state, and while Git
       doesn’t care where you save the note about that state, in practice we
       tend to just write the result to the file that is pointed at by
       .git/HEAD, so that we can always see what the last committed state was.

OPTIONS
       <tree>
	   An existing tree object

       -p <parent>
	   Each -p indicates the id of a parent commit object.

       -m <message>
	   A paragraph in the commit log message. This can be given more than
	   once and each <message> becomes its own paragraph.

       -F <file>
	   Read the commit log message from the given file. Use - to read from
	   the standard input.

       -S[<keyid>]
	   GPG-sign commit.

COMMIT INFORMATION
       A commit encapsulates:

       ·   all parent object ids

       ·   author name, email and date

       ·   committer name and email and the commit time.

       While parent object ids are provided on the command line, author and
       committer information is taken from the following environment
       variables, if set:

	   GIT_AUTHOR_NAME
	   GIT_AUTHOR_EMAIL
	   GIT_AUTHOR_DATE
	   GIT_COMMITTER_NAME
	   GIT_COMMITTER_EMAIL
	   GIT_COMMITTER_DATE

       (nb "<", ">" and "\n"s are stripped)

       In case (some of) these environment variables are not set, the
       information is taken from the configuration items user.name and
       user.email, or, if not present, the environment variable EMAIL, or, if
       that is not set, system user name and the hostname used for outgoing
       mail (taken from /etc/mailname and falling back to the fully qualified
       hostname when that file does not exist).

       A commit comment is read from stdin. If a changelog entry is not
       provided via "<" redirection, git commit-tree will just wait for one to
       be entered and terminated with ^D.

DATE FORMATS
       The GIT_AUTHOR_DATE, GIT_COMMITTER_DATE environment variables support
       the following date formats:

       Git internal format
	   It is <unix timestamp> <time zone offset>, where <unix timestamp>
	   is the number of seconds since the UNIX epoch.  <time zone offset>
	   is a positive or negative offset from UTC. For example CET (which
	   is 2 hours ahead UTC) is +0200.

       RFC 2822
	   The standard email format as described by RFC 2822, for example
	   Thu, 07 Apr 2005 22:13:13 +0200.

       ISO 8601
	   Time and date specified by the ISO 8601 standard, for example
	   2005-04-07T22:13:13. The parser accepts a space instead of the T
	   character as well.

	       Note
	       In addition, the date part is accepted in the following
	       formats: YYYY.MM.DD, MM/DD/YYYY and DD.MM.YYYY.

DISCUSSION
       At the core level, Git is character encoding agnostic.

       ·   The pathnames recorded in the index and in the tree objects are
	   treated as uninterpreted sequences of non-NUL bytes. What
	   readdir(2) returns are what are recorded and compared with the data
	   Git keeps track of, which in turn are expected to be what lstat(2)
	   and creat(2) accepts. There is no such thing as pathname encoding
	   translation.

       ·   The contents of the blob objects are uninterpreted sequences of
	   bytes. There is no encoding translation at the core level.

       ·   The commit log messages are uninterpreted sequences of non-NUL
	   bytes.

       Although we encourage that the commit log messages are encoded in
       UTF-8, both the core and Git Porcelain are designed not to force UTF-8
       on projects. If all participants of a particular project find it more
       convenient to use legacy encodings, Git does not forbid it. However,
       there are a few things to keep in mind.

	1.  git commit and git commit-tree issues a warning if the commit log
	   message given to it does not look like a valid UTF-8 string, unless
	   you explicitly say your project uses a legacy encoding. The way to
	   say this is to have i18n.commitencoding in .git/config file, like
	   this:

	       [i18n]
		       commitencoding = ISO-8859-1

	   Commit objects created with the above setting record the value of
	   i18n.commitencoding in its encoding header. This is to help other
	   people who look at them later. Lack of this header implies that the
	   commit log message is encoded in UTF-8.

	2.  git log, git show, git blame and friends look at the encoding
	   header of a commit object, and try to re-code the log message into
	   UTF-8 unless otherwise specified. You can specify the desired
	   output encoding with i18n.logoutputencoding in .git/config file,
	   like this:

	       [i18n]
		       logoutputencoding = ISO-8859-1

	   If you do not have this configuration variable, the value of
	   i18n.commitencoding is used instead.

       Note that we deliberately chose not to re-code the commit log message
       when a commit is made to force UTF-8 at the commit object level,
       because re-coding to UTF-8 is not necessarily a reversible operation.

FILES
       /etc/mailname

SEE ALSO
       git-write-tree(1)

GIT
       Part of the git(1) suite

Git 1.8.5			  11/27/2013		    GIT-COMMIT-TREE(1)
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