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4.7 Deleting, moving, and renaming tags

Normally one does not modify tags. They exist in order to record the history of the repository and so deleting them or changing their meaning would, generally, not be what you want.

However, there might be cases in which one uses a tag temporarily or accidentally puts one in the wrong place. Therefore, one might delete, move, or rename a tag.

WARNING: the commands in this section are dangerous; they permanently discard historical information and it can be difficult or impossible to recover from errors. If you are a CVS administrator, you may consider restricting these commands with the ‘taginfo’ file (see section Taginfo).

To delete a tag, specify the ‘-d’ option to either cvs tag or cvs rtag. For example:

 
cvs rtag -d rel-0-4 tc

deletes the non-branch tag rel-0-4 from the module tc. In the event that branch tags are encountered within the repository with the given name, a warning message will be issued and the branch tag will not be deleted. If you are absolutely certain you know what you are doing, the -B option may be specified to allow deletion of branch tags. In that case, any non-branch tags encountered will trigger warnings and will not be deleted.

WARNING: Moving branch tags is very dangerous! If you think you need the -B option, think again and ask your CVS administrator about it (if that isn't you). There is almost certainly another way to accomplish what you want to accomplish.

When we say move a tag, we mean to make the same name point to different revisions. For example, the stable tag may currently point to revision 1.4 of ‘backend.c’ and perhaps we want to make it point to revision 1.6. To move a non-branch tag, specify the ‘-F’ option to either cvs tag or cvs rtag. For example, the task just mentioned might be accomplished as:

 
cvs tag -r 1.6 -F stable backend.c

If any branch tags are encountered in the repository with the given name, a warning is issued and the branch tag is not disturbed. If you are absolutely certain you wish to move the branch tag, the -B option may be specified. In that case, non-branch tags encountered with the given name are ignored with a warning message.

WARNING: Moving branch tags is very dangerous! If you think you need the -B option, think again and ask your CVS administrator about it (if that isn't you). There is almost certainly another way to accomplish what you want to accomplish.

When we say rename a tag, we mean to make a different name point to the same revisions as the old tag. For example, one may have misspelled the tag name and want to correct it (hopefully before others are relying on the old spelling). To rename a tag, first create a new tag using the ‘-r’ option to cvs rtag, and then delete the old name. (Caution: this method will not work with branch tags.) This leaves the new tag on exactly the same files as the old tag. For example:

 
cvs rtag -r old-name-0-4 rel-0-4 tc
cvs rtag -d old-name-0-4 tc

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