Re: libseed-list Hooking into the imports system
- From: Jonatan Liljedahl <lijon kymatica com>
- To: Alan Knowles <alan akbkhome com>
- Cc: libseed-list gnome org
- Subject: Re: libseed-list Hooking into the imports system
- Date: Wed, 30 Jun 2010 13:58:17 +0200
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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