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Re: [PATCH] Disable VC when Emacs is noninteractive -batch


From: Richard Stallman
Subject: Re: [PATCH] Disable VC when Emacs is noninteractive -batch
Date: Tue, 07 Aug 2007 03:29:39 -0400

     >     IMO, if VC's hooks are active in batch mode, that's a bug.
     > 
     > I don't see why.

    Because they change the behavior of Emacs depending on, for example,
    whether the working file differs from the repository file.

Only if you use VC commands, as far as I know.

    VC, however, uses metadata that most programs are not aware of.  This
    can make a program that is deterministic when VC is not loaded
    nondeterministic when it is loaded.

Can you explain concretely what you mean?

     > VC only does anything when you call VC functions explicitly.
     > Unless it has a bug.

    That's clearly not true, for some value of "does anything": VC
    installs hooks which are called for various file and buffer
    operations.

I don't follow you.





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