Re: libseed-list Hooking into the imports system

[Jonatan Liljedahl <lijon kymatica com>]

Alan Knowles wrote:
...
> For the toString stuff, I guess that's needed only for this patch.

No, I think it should go in even without my 
missing-module-handler-patch. Look at this:

lijon kymatix:~/Coding/seed$ ls -l mydir/
total 12
-rw-r--r-- 1 lijon lijon 59 2010-06-18 10:03 bar.js
-rw-r--r-- 1 lijon lijon 79 2010-06-18 10:03 foo.js
-rw-r--r-- 1 lijon lijon 43 2010-06-30 13:52 toString.js
lijon kymatix:~/Coding/seed$ seed
> d = imports.mydir
Oops, where did this come from?

>^C
lijon kymatix:~/Coding/seed$ cat mydir/toString.js
print("Oops, where did this come from?");

/Jonatan

>  --- On 30/Jun/2010, Jonatan Liljedahl wrote: 
> > Here is a small patch that adds a feature that I'd be very happy to see.
> > It allows one to hook into the imports system by defining a handler for
> > when a module was not found. Example:
> >
> >    imports.__notFoundHandler__ = function(name, dir) {
> >      print("making "+name);
> >      return {foo:123}
> >    }
> >    f = imports.foobar;
> >    print(f.foo);
> >
> > running above file prints:
> >
> >    making foobar
> >    123
> >
> > This can be used to integrate all sorts of cool stuff with the imports
> > object. For example, the handler can iterate over imports.searchPath to
> > find n+".html" and return an object representation of the DOM tree, or
> > parsing a custom language (hmmmm ;)), or perhaps even connect to an
> > online database of modules.. x = imports.seedgems.foo; -> updates foo
> > from an online repository, etc...
> >
> > Currently it only passes the first path from seed_importer_search_dirs() 
> > as the second arg, at least this works for the case when the search is 
> > done inside a single directory, but I guess it would be better to just 
> > send the whole path GSList by converting it to a JS array. One could 
> > still work around it on the script side by merging the dir arg with 
> > imports.searchPath if dir != searchPath[0].
> >
> > BTW, this patch also adds the toString and toValue hack to 
> > seed_importer_dir_get_property() so it doesn't call the handler saying 
> > that "toString" module wasn't found, etc..
> >
> > /Jonatan
>
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