Re: [Monotone-devel] options for automate inventory

[William Uther]

On 14/01/2008, at 9:19 PM, Stephen Leake wrote:

> As others noticed, 0: does work in automate stdio for flag options.

Cool :)

> So I've committed new automate inventory options --no-ignored,
> --no-unknown, --no-unchanged, with appropriate tests, manual update,
> and NEWS entry.
>
> In addition, I fixed/changed automate inventory so it does not recurse
> into ignored directories. On my typical workspace, which has compiler
> output files in a directory 'objects', that gives a factor of two
> increase in speed, as measured from Emacs DVC (that includes the Emacs
> processing time, but monotone dominates).
>
> --no-ignored --no-unchanged gives another factor of three increase in
> speed.

While I'm thinking of it, I wanted to post to record another idea I  
had...

I don't know how many people use MacOS, but it has two features that  
might
help here.  The first is common to a number of systems - you can  
register
to receive events when the filesystem changes.  That is a private API on
MacOS though, and it would require having a daemon running all the time.
The second feature is directly more useful - there is a system daemon  
that
listens to the first API and records all changes, fseventsd.  You can
request a list of all changes in the filesystems below a certain
directory, since a certain time.  The granularity is a little coarse -
directories rather than files, and multi-second time increments.  But  
that
isn't a huge problem - you just scan the directories that might have
changed, rather than everything.

Just a thought...

Will       :-}

P.S.  Here is a link to the Apple docs for those interested...

http://developer.apple.com/documentation/Darwin/Conceptual/ 
FSEvents_ProgGuide/index.html