Build for Deno

[Soremwar]

Discussion in #451

This needs some polishing, namely:

• Enable tests to work based on the Deno build
• Await some of my PRs to be merged into Deno repo that fix some issues with their current Node polyfill
• Discuss method of publishing, and talk about mantainability for the future
• Document Deno polyfills
• Document Crossplatform variables and modules

[Soremwar]

Anyone that can help me debug this fails? I tried to test them on Node 6.17.1 and they all passed

[mcollina]

The changes done inside lib must be done inside build/ instead. There is a bunch of scripts there that takes code from Node.js core and rewrite it so it's agnostics. We could potentially use some of the same machinery to generate a deno build.

[mcollina]

(Unfortunately I do not have time to debug the build right now, I'm going for some extended leave and I'll be back full time next year).

[benjamingr]

@mcollina can you point me at the code that generates readable-stream from Node core? I'm not actually familiar with it :]?

[targos]

@benjamingr https://github.com/nodejs/readable-stream/blob/master/build/build.js

[Soremwar]

Someone knows what version of Node the last build of readable stream is using? The README points out to it being Node 10 but I can't really tell (needed for running the build script)

[benjamingr]

Looking at the issue I think it's v10.18.1

[Soremwar]

Thanks @benjamingr

[mcollina]

This seems pretty amazing! Are there any tests for this?

[Soremwar]

@mcollina Actually...that's the main reason why there's been so little activity in this since it was created. The build has been working for a while, but making the tests work has proven to be a major headache due to the differences between the Deno test suite and something like tap

More progress to follow though, I'm on vacations so I am putting some effort into landing this

[mcollina]

You can also write a few high level tests. We run separate tests for the browser for this reason, see https://github.com/nodejs/readable-stream/tree/master/test/browser for more details.

[mcollina]

FYI: check out #454.

[jimmywarting]

I doubt that Deno won't get much traction for node streams, they are mostly just focused on web standarder, meaning: whatwg streams. Node also recently got them.

I always try to avoid core builtin's when i develop anything for cross platform that runs in Deno, Browser and Node.
I never want to bundle the hole readable-stream into the browser, it cost too much, I always try to make my page score 100% in lighthouse
i got a own size limit to somewhere like < 100 kb when i develop a js library for browser and node:stream can easily break that threshold