dash

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This PR makes three different actions instead of one for the addin

• Run as Job in Background
• Run as Job with Environment
• Run as Job with Environment and Packages

The last one is normally what I want in order to run a snippet in the background since it also loads any attached packages. Note that Run as Job in Background would now run without the environment (which would be a change of behaviour from the current package), so they could perhaps be renamed

• Run as Job in Background
• Run as Job without Environment
• Run as Job with Environment and Packages

although the first option seems clearer to me.

Neat, thank you very kindly! I'll take this for a spin. To be honest I haven't tried {dash} with the latest RStudio versions, but I am aware they added similar support (run selection as job) recently (I'm using 1.3.322, the very latest daily is 1.3.536, but the latest official release is 1.2.5001).

I wrote this package when Jobs first appeared in the RStudio source (well before they were announced). The specification of running with/without environment or packages isn't as finely controlled as {dash}, though, so perhaps there's still a use-case here.

If you're not on mission-critical software I'd recommend trying out https://dailies.rstudio.com/ to see if it covers what you need.

Thank you for your package and detailed description regarding use-cases. I notice today there is still no support launching jobs within RStudio packages attached mode. However this use-case is highly useful e.g. you could launch several time-consuming models across CPU cores without copy-paste manipulation. Would you check @jefferis two commits, please. It works fine. I also recommend to switch name of package which could be more representative for such use case.