[Monotone-devel] Re: random thought on peg restrictions

[Derek Scherger]

Nathaniel Smith wrote:
> So along the lines of peg revisions:
>   http://svnbook.red-bean.com/en/1.1/ch07s03.html
> it might be useful to have an "any" peg, which means, "any file whose
> name matches this given name, at whatever points in history where it
> matches".  So you'd say 'log foo/address@hidden' or whatever, and get a
> list of changes filtered by surface name, not logical node id.

Yeah, that sounds like it could certainly be useful.

> And the sort of functionality required to code this -- keeping names
> around, instead of just going straight to node ids -- seems
> interestingly close to the wartish part of the node-id-based
> restrictions code, where it needs to do something similar to deal with
> unversioned items?

True enough. So are you suggesting that this makes that particular wart 
look a little less ugly or somehow justifies it or are you thinking that 
we don't want to use node id based restrictions at all?

> I have no idea whether this goes anywhere, it was just a random
> thought before bed, so I thought I'd jot it down for future reference,
> and in case it sparked anything down the line :-).

Along the same lines, I was doing a perforce sync (aka update) to a 
particular revision of some file the other day. The syntax for this is 
something like:

        $ p4 sync //depot/path/to/file#version

and as I typed that I wondered whether I was about to get the version I 
hoped for or whether '#version' would be stripped off as a comment. 
Interestingly, it seems that #foo is not considered a comment (by bash 
at least) if some non-whitespace character immediately preceeds it. What 
I mean is:

        $ echo foo #bar
        foo
        $ echo foo#bar
        foo#bar

which struck me as a bit odd but possibly convenient. It does seems a 
bit nasty though and I don't know if this is specified or standard 
behaviour. Perforce has various "special" version numbers like #none, 
#head, #have among others which all seem to rely on this quirk to some 
degree.

Cheers,
Derek