Hi,
I think there is an issue with the documentation of git tag, or with the
default being chosen for tags.
the git tag documentation say:
*****
If one of -a, -s, or -u <key-id> 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 <key-id>
are absent, -a is implied.
Otherwise just a tag reference for the SHA1 object name of the
commit object is created (i.e. a lightweight tag).
******
And no options below is provided to list annotated tags only or
lightweight tags only (is there a way to do so?)
I initially didn't get git cared too much on this difference: I've been
using both annotated and lightweight tags without distinctions,
annotated when I want to write something about the tag and non-annotated
when I do not need it.
Since no option is given to show annotated only tags these made sense to me.
Recently I started using submodules and I noticed that:
git submodule status
sometimes gave me the tag name of the submodule between parentesis and
sometimes it gave me something like this:
+6903774653de52d0206e0e6026ca6914def8a333 submodule (1.0-2-g6903774)
even if the 6903774653de52d0206e0e6026ca6914def8a333 was actually a tag
(1.1)
the git help submodule say status use git describe, so I've entered the
submodule directory and tried:
$ git describe
1.0-2-g6903774
$ git describe --tags
1.1
reading the git help describe I discovered the git describe made an
assumption and default to just show annotated tags.
To me, this assumption should have been documented very clearly in the
git tag help page, something like this:
*****
If one of -a, -s, or -u <key-id> 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 <key-id>
are absent, -a is implied.
Otherwise just a tag reference for the SHA1 object name of the
commit object is created (i.e. a lightweight tag).
ANNOTATED vs LIGHTWEIGHT tags
Some git command (ex. git describe) by default only consider
annotated tags. Annotated and Lightweight tags are not the same thing
for git and you shouldn't mix them up. Annotated tags are meant for
release while lightweight tags are meant to tag random commits.
******
And I think an option in git tag to only show annotated tags (or only
show lightweight tags) is needed.
Finally, now that I discovered this I can't replace the lightweights
tags with annotated tags without a public announcement requiring all
developers to delete their local tags.
I'm not aware of any discussion you did about this matter but I think
there's something wrong here that should be fixed.
Regards,
Daniele Segato
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