Re: [PATCH] Introduce a filter-path argument to git-daemon, for doing custom path transformations

2009/3/19 Johannes Schindelin [off-list ref]:

quoted

I actually was hoping (especially we have Dscho on Cc: list) that somebody
like you would start suggesting a "plug in" approach to load .so files,
which would lead to a easy-to-port dso support with the help from msysgit
folks we can use later in other parts of the system (e.g. customizable
filters used for diff textconv, clean/smudge, etc.)

I do not like that at all.  Dynamic libraries -- especially on Windows --
are a major hassle.

However, I cannot think of anything Johan might want to do that would not
be possible using a bunch of regular expressions together with
substitions.

Let me reiterate my use-case then: I need to dynamically substitute
one path with another. Perhaps "map" paints a better picture than
"substitute" here. Please refer to my second mail in this thread for
more details.

The only way I can see regexps work, is that if they're read, on a
per-request basis (reloading git-daemon every time they change is just
silly), from somewhere outside the git-daemon. Then, you might as well
take the full-on approach this patch provides.

Cheers,
JS

FWIW I have experimental code in my personal tree that sports
strbuf_regsub(), a function to replace matches of a regular expression
(possibly with groups) by a given string (which may contain \0 .. \9,
being replaced with the respective group's contents).

Ciao,
Dscho