use nbconvert to write scripts

[akhmerov]

Compared to the current implementation

• Adds a correct shebang for known langauges
• If a comment format is known, converts markdown to comments
• Falls back gracefully to only include code cells if it doesn't know what to do

@chrisjsewell :point_up: I think this supersedes #159

I think we could lean more on the nbconvert API, but this seems like a direct incremental improvement over what we have now.

[chrisjsewell]

Thanks @akhmerov, see the code comment

[chrisjsewell]

and looks like issues with the logger 😬

[akhmerov]

and looks like issues with the logger :grimacing:

https://github.com/ipython/traitlets/issues/606 :tired_face:

I'll think what to do about those.

[chrisjsewell]

FYI, you may want to try using tox (see https://github.com/executablebooks/MyST-NB/blob/master/tox.ini), which I've found recently makes it super easy to run these tests locally, without the need to set up a development environment

[akhmerov]

FYI, you may want to try using tox (see https://github.com/executablebooks/MyST-NB/blob/master/tox.ini), which I've found recently makes it super easy to run these tests locally, without the need to set up a development environment

Sounds good, #161

[akhmerov]

Still remaining: tests, including coconut kernel, although I gotta avoid making this a dependency.