I've begun my work on a second draft [1] of the module proposal that Ihab and I put forth at the January meeting. Just to get started, I wanted to emphasize that "all we need is hermetic evaluation", and re-propose the interface for hermetic eval in light of experience with the CommonJS [2] and Narwhal [3] implementations of the SecurableModules [4] proposal Ihab and I made to that group a week later. We've made a lot of great progress in the last 9 months in vetting the module system idea.
This new draft proposes that the primitive hermetic evaluator be more like the Function constructor and permits early exceptions for non-primordial, non-injected free variables. The new proposal is safer since it emphasizes that the module text must be a program construct, makes explicit what names are being injected into the program's scope, and explicates that, unlike "with" blocks, specific names are injected into a function block scope instead of placing a stock Object in the scope chain. It's my intention to copy and edit sections of the original proposal into the wiki, making minor revisions to match up with CommonJS SecurableModules, the Module meta-object amendment [5], explicate synchronous and asynchronous variations of importing modules, and to specify the API's of module loaders and module sandboxes. Ihab is spearheading an effort on CommonJS to formalize "packages" of modules, their layout, their metadata, how to verify their signatures, and how to import modules from packages, which I hope to integrate in a future draft. We remain in discord about whether to conflate the name spaces of injected capabilities and modules, but we had a good discussion recently that might help us arrive at a compromise. This all being said, between Object.freeze and hermetic evaluation, we can do a lot in libraries without native language support so it's worth kicking off a discussion around that feature early. Kris Kowal [1] http://wiki.ecmascript.org/doku.php?id=strawman:modules [2] http://wiki.commonjs.org/wiki/CommonJS [3] http://narwhaljs.org/ [4] http://wiki.commonjs.org/wiki/Modules/SecurableModules [5] http://wiki.commonjs.org/wiki/Modules/Meta _______________________________________________ es-discuss mailing list [email protected] https://mail.mozilla.org/listinfo/es-discuss
