|Subject:||Checking if two versions are the same|
|Date:||Thu, 12 Jun 2003 10:51:05 +0300|
I have a tag name, and a working directory of some project (without a sticky tag). I want to know if the tag name denotes the same version as my working directory. What is the right way to find out?
Suppose that I have just checked-out this working directory (i.e. only the files from CVS are in the working directory, and I have not touched them) – is the following algorithm correct?
1. Run: cvs –qn update –r tag-name
2. If this command had no output at all, then the tag name denotes the same as the checked-out version. If the command had output (either on stdout or on stderr), then the tag name denotes a different version.
[ In any case, I would prefer a simpler solution, in which I don’t need to check stderr, and preferrably even not stdout, only the exit status of a command. This is because the algorithm needs to run in several environments. ]
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