Add ts-node for dev

[Akimyou]

Changes

Add ts-node for run snowpack ts source directly, may be it can speed up our dev flow.

cd snowpack/packages/snowpack
npm link

New bin snowpack-ts will be add to global.

We can use it as normal pre builded bin snowpack, such as:

snowpack-ts --help
snowpack-ts build

We can config ts-node by edit snowpack/packages/snowpack/tsconfig.ts-node.json or by pass args to ts-node:

snowpack-ts -T -- --help

The args before -- will be pass to ts-node, agrs after -- will be pass to snowpack.

In default we enable ts-node transpileOnly option for speed up compile time( without type check ).

It will cost 2s in my mac to compile.

time snowpack-ts --help
# MacBook Pro (15-inch, 2018), 2.2 GHz Intel Core i7, 16 GB 2400 MHz DDR4
# snowpack-ts --help  2.07s user 0.10s system 152% cpu 1.429 total

Hope this tool can help we have a better dev experience.

Thanks for hard work on snowpack.

• https://github.com/TypeStrong/ts-node

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[FredKSchott]

At this time, we're only interested in maintaining a single node.js executable. Sorry we can't merge, but thanks for taking the time to look into this!