Deprecate process shell block

[bentsherman]

Based on some recent internal discussions. The original purpose of the shell block was to help distinguish between Nextflow and Bash variables in the process script. Since the VS Code extension now provides both syntax highlighting and error checking for variable names, the shell block isn't needed as much and can be phased out to promote consistent code.

I didn't bother to add a warning in the code because I will add one in the language server, but we can add one here if you want.

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[pditommaso]

It would make sense to add a deprecation warning (and a warning to disable it)

[christopher-hakkaart]

Can we clarify the behavior of single (') vs. double quotes (") in this PR as well?

[pbelmann]

Just my two cents: I use most of the time the terminal to work on Nextflow files, and I think it's still useful to easily distinguish between Nextflow and Bash variables.

[bentsherman]

@pbelmann which terminal editor do you use? the language server is being integrated with other editors here. I believe they already have emacs and neovim

[bentsherman]

@christopher-hakkaart I will address single vs double quotes in the other PR, but I believe shell: is meant to be used always with single quotes so that the dollar sign isn't treated as a Nextflow variable

[pbelmann]

@pbelmann which terminal editor do you use? the language server is being integrated with other editors here. I believe they already have emacs and neovim

I use Vim most of the time.

[bentsherman]

I'm not sure if vim supports LSP but they just added the nextflow language server to neovim

[pbelmann]

I'm not sure if vim supports LSP but they just added the nextflow language server to neovim

Thanks for the info. I think I've just been very happy with the fact that you don't need a special editor or editor plugin to work on Nextflow files. I will have a closer look at neovim.