Grump 1.0-ish wishlist

[guncha]

Tracking things I'd like to do / fix for the 1.0 release:

• Rewrite Grump in Typescript

This would help ensure that GrumpFS indeed matches the Node's FS interface and increase reliability. It's also an opportunity to clean up a bunch of modules and perhaps narrow the scope some more.

• Cache the directory tree so it can be reused by GrumpFS

A lot of globbing libraries like to make a lot of fs.dirlist calls and currently each one of them triggers a full traversal of the handlers. Also, since the handlers are based on the patterns and not actual directory structure, weird requests can be served where something that looks like a directory is actually a file.

• Don't trigger the handler when doing fs.stat calls and similar

Most callers just want to know if a file exists and if it's a directory. These can be answered by traversing the handlers. Only asking for the file size would require running the handler, but I'm yet to see any build tool that does that.

• Grump.require should wrap graceful-fs and similar libraries, too
• Add ability for handlers to pass on handling the filename in which case the next one is tried
• Find a better way to deal with *Sync calls

Currently, the sync package requires that the current stack frame starts inside a fiber somewhere which any callback based code is going to violate. There could be a separate sync path trough Grump that does it's best to serve the request. This would also let us get rid of the fibers package which is a compiled module that patches Node internals and could cause weird bugs and conflicts.

• Implement the less used fs methods for GrumpFS, like read and open.
• Implement fs write methods that should simply write the file to the cache or with a configuration option, write it to the file system.