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Re: Completion and command versions
- X-seq: zsh-workers 18353
- From: Oliver Kiddle <okiddle@xxxxxxxxxxx>
- To: zsh-workers@xxxxxxxxxx
- Subject: Re: Completion and command versions
- Date: Fri, 14 Mar 2003 12:58:18 +0100
- In-reply-to: <28975.1047637814@xxxxxxx>
- Mailing-list: contact zsh-workers-help@xxxxxxxxxx; run by ezmlm
- References: <28975.1047637814@xxxxxxx>
> Doug Kearns wrote:
> > Is there a policy regarding the command version that completion
> > functions should support? What about commands where there are
> > significant changes between versions?
I don't think we have any official policy. For most commands, where the
differences are little more than a few added options I just update it
to the latest version.
If an option that takes an argument is removed you could precede the
_arguments spec with \! so that it is recognised but not completed.
Where a command changes significantly, and in particular where an old
version continues to be in wide use, it can then be worth the trouble
of handling the old version.
> The standard way is using the _pick_variant function.
> If it's too dangerous to run the command to find out what it does, you
> probably need a style. `variant' is already use by _pick_variant,
> unfortunately --- it's not a very good name, since it doesn't give the
> variant, it gives the programme to run to pick the variant. Of course
_pick_variant is not in 4.0 so it isn't too late to change this. It
perhaps should stick with the command style but set the tag to `variant'
when looking it up.
Another issue we perhaps ought to think about is how we keep track
of what version of a command the functions have been updated to. I
notice some people have put a version number in a comment at the top
of functions which is one way. What we could do is setup a separate cvs
repository containing the output of the commands' --help (or equivalent)
outputs. I've found that diffing these is a good way of finding any
new options - assuming I still have the old program around to get it's
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