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215a7ad1 JH |
1 | git-tag(1) |
2 | ========== | |
2cf565c5 DG |
3 | |
4 | NAME | |
5 | ---- | |
453c1e85 | 6 | git-tag - Create, list, delete or verify a tag object signed with GPG |
2cf565c5 DG |
7 | |
8 | ||
2cf565c5 DG |
9 | SYNOPSIS |
10 | -------- | |
b867c7c2 | 11 | [verse] |
b1889c36 JN |
12 | 'git tag' [-a | -s | -u <key-id>] [-f] [-m <msg> | -F <file>] <name> [<head>] |
13 | 'git tag' -d <name>... | |
14 | 'git tag' [-n[<num>]] -l [<pattern>] | |
15 | 'git tag' -v <name>... | |
2cf565c5 DG |
16 | |
17 | DESCRIPTION | |
18 | ----------- | |
b867c7c2 | 19 | Adds a 'tag' reference in `.git/refs/tags/` |
b7e438f9 | 20 | |
bc162e40 LT |
21 | Unless `-f` is given, the tag must not yet exist in |
22 | `.git/refs/tags/` directory. | |
b7e438f9 | 23 | |
bc162e40 LT |
24 | If one of `-a`, `-s`, or `-u <key-id>` is passed, the command |
25 | creates a 'tag' object, and requires the tag message. Unless | |
62e09ce9 | 26 | `-m <msg>` or `-F <file>` is given, an editor is started for the user to type |
bc162e40 | 27 | in the tag message. |
b7e438f9 | 28 | |
995e8df4 DS |
29 | If `-m <msg>` or `-F <file>` is given and `-a`, `-s`, and `-u <key-id>` |
30 | are absent, `-a` is implied. | |
31 | ||
bc162e40 | 32 | Otherwise just the SHA1 object name of the commit object is |
56b5e946 | 33 | written (i.e. a lightweight tag). |
bc162e40 LT |
34 | |
35 | A GnuPG signed tag object will be created when `-s` or `-u | |
36 | <key-id>` is used. When `-u <key-id>` is not used, the | |
37 | committer identity for the current user is used to find the | |
38 | GnuPG key for signing. | |
2cf565c5 | 39 | |
d839091d NW |
40 | OPTIONS |
41 | ------- | |
42 | -a:: | |
43 | Make an unsigned, annotated tag object | |
44 | ||
45 | -s:: | |
46 | Make a GPG-signed tag, using the default e-mail address's key | |
47 | ||
48 | -u <key-id>:: | |
49 | Make a GPG-signed tag, using the given key | |
50 | ||
51 | -f:: | |
52 | Replace an existing tag with the given name (instead of failing) | |
53 | ||
54 | -d:: | |
453c1e85 | 55 | Delete existing tags with the given names. |
d839091d | 56 | |
0bc72abd | 57 | -v:: |
62e09ce9 | 58 | Verify the gpg signature of the given tag names. |
0bc72abd | 59 | |
3f36cbba | 60 | -n<num>:: |
980ea5c5 MM |
61 | <num> specifies how many lines from the annotation, if any, |
62 | are printed when using -l. | |
63 | The default is not to print any annotation lines. | |
62e09ce9 | 64 | If no number is given to `-n`, only the first line is printed. |
980ea5c5 | 65 | |
b867c7c2 | 66 | -l <pattern>:: |
980ea5c5 | 67 | List tags with names that match the given pattern (or all if no pattern is given). |
62e09ce9 | 68 | Typing "git tag" without arguments, also lists all tags. |
b867c7c2 | 69 | |
d839091d | 70 | -m <msg>:: |
bd46c9a9 JH |
71 | Use the given tag message (instead of prompting). |
72 | If multiple `-m` options are given, there values are | |
73 | concatenated as separate paragraphs. | |
995e8df4 DS |
74 | Implies `-a` if none of `-a`, `-s`, or `-u <key-id>` |
75 | is given. | |
d839091d | 76 | |
f79c73ce JS |
77 | -F <file>:: |
78 | Take the tag message from the given file. Use '-' to | |
79 | read the message from the standard input. | |
995e8df4 DS |
80 | Implies `-a` if none of `-a`, `-s`, or `-u <key-id>` |
81 | is given. | |
2cf565c5 | 82 | |
d67778ec AP |
83 | CONFIGURATION |
84 | ------------- | |
85 | By default, git-tag in sign-with-default mode (-s) will use your | |
86 | committer identity (of the form "Your Name <your@email.address>") to | |
87 | find a key. If you want to use a different default key, you can specify | |
88 | it in the repository configuration as follows: | |
89 | ||
86b9e017 | 90 | ------------------------------------- |
d67778ec AP |
91 | [user] |
92 | signingkey = <gpg-key-id> | |
86b9e017 | 93 | ------------------------------------- |
d67778ec | 94 | |
4853534e JH |
95 | |
96 | DISCUSSION | |
97 | ---------- | |
98 | ||
99 | On Re-tagging | |
100 | ~~~~~~~~~~~~~ | |
101 | ||
102 | What should you do when you tag a wrong commit and you would | |
103 | want to re-tag? | |
104 | ||
105 | If you never pushed anything out, just re-tag it. Use "-f" to | |
106 | replace the old one. And you're done. | |
107 | ||
108 | But if you have pushed things out (or others could just read | |
109 | your repository directly), then others will have already seen | |
110 | the old tag. In that case you can do one of two things: | |
111 | ||
112 | . The sane thing. | |
113 | Just admit you screwed up, and use a different name. Others have | |
114 | already seen one tag-name, and if you keep the same name, you | |
115 | may be in the situation that two people both have "version X", | |
116 | but they actually have 'different' "X"'s. So just call it "X.1" | |
117 | and be done with it. | |
118 | ||
119 | . The insane thing. | |
120 | You really want to call the new version "X" too, 'even though' | |
b1889c36 | 121 | others have already seen the old one. So just use "git-tag -f" |
4853534e JH |
122 | again, as if you hadn't already published the old one. |
123 | ||
06ada152 | 124 | However, Git does *not* (and it should not) change tags behind |
46e56e81 | 125 | users back. So if somebody already got the old tag, doing a |
b1889c36 | 126 | "git-pull" on your tree shouldn't just make them overwrite the old |
4853534e JH |
127 | one. |
128 | ||
129 | If somebody got a release tag from you, you cannot just change | |
130 | the tag for them by updating your own one. This is a big | |
131 | security issue, in that people MUST be able to trust their | |
132 | tag-names. If you really want to do the insane thing, you need | |
133 | to just fess up to it, and tell people that you messed up. You | |
134 | can do that by making a very public announcement saying: | |
135 | ||
136 | ------------ | |
137 | Ok, I messed up, and I pushed out an earlier version tagged as X. I | |
138 | then fixed something, and retagged the *fixed* tree as X again. | |
139 | ||
140 | If you got the wrong tag, and want the new one, please delete | |
141 | the old one and fetch the new one by doing: | |
142 | ||
143 | git tag -d X | |
144 | git fetch origin tag X | |
145 | ||
146 | to get my updated tag. | |
147 | ||
148 | You can test which tag you have by doing | |
149 | ||
150 | git rev-parse X | |
151 | ||
152 | which should return 0123456789abcdef.. if you have the new version. | |
153 | ||
154 | Sorry for inconvenience. | |
155 | ------------ | |
156 | ||
157 | Does this seem a bit complicated? It *should* be. There is no | |
158 | way that it would be correct to just "fix" it behind peoples | |
159 | backs. People need to know that their tags might have been | |
160 | changed. | |
161 | ||
162 | ||
163 | On Automatic following | |
164 | ~~~~~~~~~~~~~~~~~~~~~~ | |
165 | ||
166 | If you are following somebody else's tree, you are most likely | |
167 | using tracking branches (`refs/heads/origin` in traditional | |
168 | layout, or `refs/remotes/origin/master` in the separate-remote | |
169 | layout). You usually want the tags from the other end. | |
170 | ||
171 | On the other hand, if you are fetching because you would want a | |
172 | one-shot merge from somebody else, you typically do not want to | |
173 | get tags from there. This happens more often for people near | |
174 | the toplevel but not limited to them. Mere mortals when pulling | |
175 | from each other do not necessarily want to automatically get | |
176 | private anchor point tags from the other person. | |
177 | ||
178 | You would notice "please pull" messages on the mailing list says | |
179 | repo URL and branch name alone. This is designed to be easily | |
b1889c36 | 180 | cut&pasted to "git-fetch" command line: |
4853534e JH |
181 | |
182 | ------------ | |
183 | Linus, please pull from | |
184 | ||
185 | git://git..../proj.git master | |
186 | ||
187 | to get the following updates... | |
188 | ------------ | |
189 | ||
190 | becomes: | |
191 | ||
192 | ------------ | |
193 | $ git pull git://git..../proj.git master | |
194 | ------------ | |
195 | ||
196 | In such a case, you do not want to automatically follow other's | |
197 | tags. | |
198 | ||
199 | One important aspect of git is it is distributed, and being | |
200 | distributed largely means there is no inherent "upstream" or | |
201 | "downstream" in the system. On the face of it, the above | |
202 | example might seem to indicate that the tag namespace is owned | |
203 | by upper echelon of people and tags only flow downwards, but | |
204 | that is not the case. It only shows that the usage pattern | |
205 | determines who are interested in whose tags. | |
206 | ||
207 | A one-shot pull is a sign that a commit history is now crossing | |
208 | the boundary between one circle of people (e.g. "people who are | |
209 | primarily interested in networking part of the kernel") who may | |
210 | have their own set of tags (e.g. "this is the third release | |
211 | candidate from the networking group to be proposed for general | |
212 | consumption with 2.6.21 release") to another circle of people | |
213 | (e.g. "people who integrate various subsystem improvements"). | |
214 | The latter are usually not interested in the detailed tags used | |
215 | internally in the former group (that is what "internal" means). | |
216 | That is why it is desirable not to follow tags automatically in | |
217 | this case. | |
218 | ||
219 | It may well be that among networking people, they may want to | |
220 | exchange the tags internal to their group, but in that workflow | |
221 | they are most likely tracking with each other's progress by | |
222 | having tracking branches. Again, the heuristic to automatically | |
223 | follow such tags is a good thing. | |
224 | ||
225 | ||
5040beff MO |
226 | On Backdating Tags |
227 | ~~~~~~~~~~~~~~~~~~ | |
228 | ||
229 | If you have imported some changes from another VCS and would like | |
230 | to add tags for major releases of your work, it is useful to be able | |
231 | to specify the date to embed inside of the tag object. The data in | |
232 | the tag object affects, for example, the ordering of tags in the | |
233 | gitweb interface. | |
234 | ||
235 | To set the date used in future tag objects, set the environment | |
055b6615 | 236 | variable GIT_COMMITTER_DATE to one or more of the date and time. The |
5040beff MO |
237 | date and time can be specified in a number of ways; the most common |
238 | is "YYYY-MM-DD HH:MM". | |
239 | ||
240 | An example follows. | |
241 | ||
242 | ------------ | |
055b6615 | 243 | $ GIT_COMMITTER_DATE="2006-10-02 10:31" git tag -s v1.0.1 |
5040beff MO |
244 | ------------ |
245 | ||
246 | ||
2cf565c5 DG |
247 | Author |
248 | ------ | |
3f971fc4 JH |
249 | Written by Linus Torvalds <torvalds@osdl.org>, |
250 | Junio C Hamano <junkio@cox.net> and Chris Wright <chrisw@osdl.org>. | |
2cf565c5 DG |
251 | |
252 | Documentation | |
253 | -------------- | |
254 | Documentation by David Greaves, Junio C Hamano and the git-list <git@vger.kernel.org>. | |
255 | ||
256 | GIT | |
257 | --- | |
9e1f0a85 | 258 | Part of the linkgit:git[1] suite |