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Controlling What Actions Are Watched

By default, watchers are notified about three kinds of action: edits, commits, and unedits. However, if you only want to be notified about, say, commits, you can restrict notifications by adjusting your watch with the -a flag (a for action):

     floss$ cvs watch add -a commit hello.c

Or if you want to watch edits and commits but don't care about unedits, you could pass the -a flag twice:

     floss$ cvs watch add -a edit -a commit hello.c

Adding a watch with the -a flag will never cause any of your existing watches to be removed. If you were watching for all three kinds of actions on hello.c, running

     floss$ cvs watch add -a commit hello.c

has no effect – you'll still be a watcher for all three actions. To remove watches, you should run

     floss$ cvs watch remove hello.c

which is similar to add in that, by default, it removes your watches for all three actions. If you pass -a arguments, it removes only the watches you specify:

     floss$ cvs watch remove -a commit hello.c

This means that you want to stop receiving notifications about commits but continue to receive notifications about edits and unedits (assuming you were watching edits and unedits to begin with, that is).

There are two special actions you can pass to the -a flag: all or none. The former means all actions that are eligible for watching (edits, commits, and unedits, as of this writing), and the latter means none of these. Because CVS's default behavior, in the absence of -a, is to watch all actions, and because watching none is the same as removing yourself from the watch list entirely, it's hard to imagine a situation in which it would be useful to specify either of these two special actions. However, cvs edit also takes the -a option, and in this case, it can be useful to specify all or none. For example, someone working on a file very briefly may not want to receive any notifications about what other people do with the file. Thus, this command

     paste$ whoami
     qsmith
     paste$ cvs edit -a none README.txt

causes watchers of README.txt to be notified that qsmith is about to work on it, but qsmith would not be added as a temporary watcher of README.txt during his editing session (which he normally would have been), because he asked not to watch any actions.

Remember that you can only affect your own watches with the cvs watch command. You may stop watching a certain file yourself, but that won't change anyone else's watches.

Karl Fogel wrote this book. Buy a printed copy via his homepage at red-bean.com

copyright  ©  March 25 2019 sean dreilinger url: https://durak.org/sean/pubs/software/cvsbook/Controlling-What-Actions-Are-Watched.html