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GIT-TAG(1)			  Git Manual			    GIT-TAG(1)

NAME
       git-tag - Create, list, delete or verify	a tag object signed with GPG

SYNOPSIS
       git tag [-a | -s	| -u <keyid>] [-f] [-m <msg> | -F <file>]
	       <tagname> [<commit> | <object>]
       git tag -d <tagname>...
       git tag [-n[<num>]] -l [--contains <commit>] [--no-contains <commit>]
	       [--points-at <object>] [--column[=<options>] | --no-column]
	       [--create-reflog] [--sort=<key>]	[--format=<format>]
	       [--[no-]merged [<commit>]] [<pattern>...]
       git tag -v [--format=<format>] <tagname>...

DESCRIPTION
       Add a tag reference in refs/tags/, unless -d/-l/-v is given to delete,
       list or verify tags.

       Unless -f is given, the named tag must not yet exist.

       If one of -a, -s, or -u <keyid> is passed, the command creates a	tag
       object, and requires a tag message. Unless -m <msg> or -F <file>	is
       given, an editor	is started for the user	to type	in the tag message.

       If -m <msg> or -F <file>	is given and -a, -s, and -u <keyid> are
       absent, -a is implied.

       Otherwise just a	tag reference for the SHA-1 object name	of the commit
       object is created (i.e. a lightweight tag).

       A GnuPG signed tag object will be created when -s or -u <keyid> is
       used. When -u <keyid> is	not used, the committer	identity for the
       current user is used to find the	GnuPG key for signing. The
       configuration variable gpg.program is used to specify custom GnuPG
       binary.

       Tag objects (created with -a, -s, or -u)	are called "annotated" tags;
       they contain a creation date, the tagger	name and e-mail, a tagging
       message,	and an optional	GnuPG signature. Whereas a "lightweight" tag
       is simply a name	for an object (usually a commit	object).

       Annotated tags are meant	for release while lightweight tags are meant
       for private or temporary	object labels. For this	reason,	some git
       commands	for naming objects (like git describe) will ignore lightweight
       tags by default.

OPTIONS
       -a, --annotate
	   Make	an unsigned, annotated tag object

       -s, --sign
	   Make	a GPG-signed tag, using	the default e-mail address's key.

       -u <keyid>, --local-user=<keyid>
	   Make	a GPG-signed tag, using	the given key.

       -f, --force
	   Replace an existing tag with	the given name (instead	of failing)

       -d, --delete
	   Delete existing tags	with the given names.

       -v, --verify
	   Verify the GPG signature of the given tag names.

       -n<num>
	   <num> specifies how many lines from the annotation, if any, are
	   printed when	using -l. Implies --list.

	   The default is not to print any annotation lines. If	no number is
	   given to -n,	only the first line is printed.	If the tag is not
	   annotated, the commit message is displayed instead.

       -l, --list
	   List	tags. With optional <pattern>..., e.g.	git tag	--list 'v-*',
	   list	only the tags that match the pattern(s).

	   Running "git	tag" without arguments also lists all tags. The
	   pattern is a	shell wildcard (i.e., matched using fnmatch(3)).
	   Multiple patterns may be given; if any of them matches, the tag is
	   shown.

	   This	option is implicitly supplied if any other list-like option
	   such	as --contains is provided. See the documentation for each of
	   those options for details.

       --sort=<key>
	   Sort	based on the key given.	Prefix - to sort in descending order
	   of the value. You may use the --sort=<key> option multiple times,
	   in which case the last key becomes the primary key. Also supports
	   "version:refname" or	"v:refname" (tag names are treated as
	   versions). The "version:refname" sort order can also	be affected by
	   the "versionsort.suffix" configuration variable. The	keys supported
	   are the same	as those in git	for-each-ref. Sort order defaults to
	   the value configured	for the	tag.sort variable if it	exists,	or
	   lexicographic order otherwise. See git-config(1).

       -i, --ignore-case
	   Sorting and filtering tags are case insensitive.

       --column[=<options>], --no-column
	   Display tag listing in columns. See configuration variable
	   column.tag for option syntax.--column and --no-column without
	   options are equivalent to always and	never respectively.

	   This	option is only applicable when listing tags without annotation
	   lines.

       --contains [<commit>]
	   Only	list tags which	contain	the specified commit (HEAD if not
	   specified). Implies --list.

       --no-contains [<commit>]
	   Only	list tags which	don't contain the specified commit (HEAD if
	   not specified). Implies --list.

       --merged	[<commit>]
	   Only	list tags whose	commits	are reachable from the specified
	   commit (HEAD	if not specified), incompatible	with --no-merged.

       --no-merged [<commit>]
	   Only	list tags whose	commits	are not	reachable from the specified
	   commit (HEAD	if not specified), incompatible	with --merged.

       --points-at <object>
	   Only	list tags of the given object (HEAD if not specified). Implies
	   --list.

       -m <msg>, --message=<msg>
	   Use the given tag message (instead of prompting). If	multiple -m
	   options are given, their values are concatenated as separate
	   paragraphs. Implies -a if none of -a, -s, or	-u <keyid> is given.

       -F <file>, --file=<file>
	   Take	the tag	message	from the given file. Use - to read the message
	   from	the standard input. Implies -a if none of -a, -s, or -u
	   <keyid> is given.

       --cleanup=<mode>
	   This	option sets how	the tag	message	is cleaned up. The _mode_ can
	   be one of verbatim, whitespace and strip. The strip mode is
	   default. The	verbatim mode does not change message at all,
	   whitespace removes just leading/trailing whitespace lines and strip
	   removes both	whitespace and commentary.

       --create-reflog
	   Create a reflog for the tag.	To globally enable reflogs for tags,
	   see core.logAllRefUpdates in	git-config(1). The negated form
	   --no-create-reflog only overrides an	earlier	--create-reflog, but
	   currently does not negate the setting of core.logallrefupdates.

       <tagname>
	   The name of the tag to create, delete, or describe. The new tag
	   name	must pass all checks defined by	git-check-ref-format(1). Some
	   of these checks may restrict	the characters allowed in a tag	name.

       <commit>, <object>
	   The object that the new tag will refer to, usually a	commit.
	   Defaults to HEAD.

       <format>
	   A string that interpolates %(fieldname) from	the object pointed at
	   by a	ref being shown. The format is the same	as that	of git-for-
	   each-ref(1).	When unspecified, defaults to %(refname:strip=2).

CONFIGURATION
       By default, git tag in sign-with-default	mode (-s) will use your
       committer identity (of the form Your Name <your@email.address>) to find
       a key. If you want to use a different default key, you can specify it
       in the repository configuration as follows:

	   [user]
	       signingKey = <gpg-keyid>

DISCUSSION
   On Re-tagging
       What should you do when you tag a wrong commit and you would want to
       re-tag?

       If you never pushed anything out, just re-tag it. Use "-f" to replace
       the old one. And	you're done.

       But if you have pushed things out (or others could just read your
       repository directly), then others will have already seen	the old	tag.
       In that case you	can do one of two things:

	1. The sane thing. Just	admit you screwed up, and use a	different
	   name. Others	have already seen one tag-name,	and if you keep	the
	   same	name, you may be in the	situation that two people both have
	   "version X",	but they actually have different "X"'s.	So just	call
	   it "X.1" and	be done	with it.

	2. The insane thing. You really	want to	call the new version "X" too,
	   even	though others have already seen	the old	one. So	just use git
	   tag -f again, as if you hadn't already published the	old one.

       However,	Git does not (and it should not) change	tags behind users
       back. So	if somebody already got	the old	tag, doing a git pull on your
       tree shouldn't just make	them overwrite the old one.

       If somebody got a release tag from you, you cannot just change the tag
       for them	by updating your own one. This is a big	security issue,	in
       that people MUST	be able	to trust their tag-names. If you really	want
       to do the insane	thing, you need	to just	fess up	to it, and tell	people
       that you	messed up. You can do that by making a very public
       announcement saying:

	   Ok, I messed	up, and	I pushed out an	earlier	version	tagged as X. I
	   then	fixed something, and retagged the *fixed* tree as X again.

	   If you got the wrong	tag, and want the new one, please delete
	   the old one and fetch the new one by	doing:

		   git tag -d X
		   git fetch origin tag	X

	   to get my updated tag.

	   You can test	which tag you have by doing

		   git rev-parse X

	   which should	return 0123456789abcdef.. if you have the new version.

	   Sorry for the inconvenience.

       Does this seem a	bit complicated? It should be. There is	no way that it
       would be	correct	to just	"fix" it automatically.	People need to know
       that their tags might have been changed.

   On Automatic	following
       If you are following somebody else's tree, you are most likely using
       remote-tracking branches	(eg. refs/remotes/origin/master). You usually
       want the	tags from the other end.

       On the other hand, if you are fetching because you would	want a
       one-shot	merge from somebody else, you typically	do not want to get
       tags from there.	This happens more often	for people near	the toplevel
       but not limited to them.	Mere mortals when pulling from each other do
       not necessarily want to automatically get private anchor	point tags
       from the	other person.

       Often, "please pull" messages on	the mailing list just provide two
       pieces of information: a	repo URL and a branch name; this is designed
       to be easily cut&pasted at the end of a git fetch command line:

	   Linus, please pull from

		   git://git..../proj.git master

	   to get the following	updates...

       becomes:

	   $ git pull git://git..../proj.git master

       In such a case, you do not want to automatically	follow the other
       person's	tags.

       One important aspect of Git is its distributed nature, which largely
       means there is no inherent "upstream" or	"downstream" in	the system. On
       the face	of it, the above example might seem to indicate	that the tag
       namespace is owned by the upper echelon of people and that tags only
       flow downwards, but that	is not the case. It only shows that the	usage
       pattern determines who are interested in	whose tags.

       A one-shot pull is a sign that a	commit history is now crossing the
       boundary	between	one circle of people (e.g. "people who are primarily
       interested in the networking part of the	kernel") who may have their
       own set of tags (e.g. "this is the third	release	candidate from the
       networking group	to be proposed for general consumption with 2.6.21
       release") to another circle of people (e.g. "people who integrate
       various subsystem improvements"). The latter are	usually	not interested
       in the detailed tags used internally in the former group	(that is what
       "internal" means). That is why it is desirable not to follow tags
       automatically in	this case.

       It may well be that among networking people, they may want to exchange
       the tags	internal to their group, but in	that workflow they are most
       likely tracking each other's progress by	having remote-tracking
       branches. Again,	the heuristic to automatically follow such tags	is a
       good thing.

   On Backdating Tags
       If you have imported some changes from another VCS and would like to
       add tags	for major releases of your work, it is useful to be able to
       specify the date	to embed inside	of the tag object; such	data in	the
       tag object affects, for example,	the ordering of	tags in	the gitweb
       interface.

       To set the date used in future tag objects, set the environment
       variable	GIT_COMMITTER_DATE (see	the later discussion of	possible
       values; the most	common form is "YYYY-MM-DD HH:MM").

       For example:

	   $ GIT_COMMITTER_DATE="2006-10-02 10:31" git tag -s v1.0.1

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 1	hour ahead of UTC) is +0100.

       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.

SEE ALSO
       git-check-ref-format(1).	git-config(1).

GIT
       Part of the git(1) suite

Git 2.13.2			  06/24/2017			    GIT-TAG(1)

NAME | SYNOPSIS | DESCRIPTION | OPTIONS | CONFIGURATION | DISCUSSION | DATE FORMATS | SEE ALSO | GIT

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