Content/build.fsx: use CreateProcess

[dharmatech]

Summary of changes

Use CreateProcess instead of Process.start

Issue

If I go through the "How to start" guide for Saturn:

https://saturnframework.org/tutorials/how-to-start.html

when I run the last step:

dotnet fake build -t run

the webserver does indeed appear to start. I can go to http://localhost:8085/books and see the resulting application.

However, if I ctrl-c at the console to stop the webserver, I notice the following:

On Windows, the browser is never launched.

Changes

The following line:

    Process.start (fun i -> { i with FileName = "http://localhost:8085" }) |> ignore

was replaced with the following:

    if RuntimeInformation.IsOSPlatform(OSPlatform.Windows) then
      CreateProcess.fromRawCommand "cmd.exe" [ "/C"; "start http://localhost:8085" ] |> Proc.run |> ignore
    elif RuntimeInformation.IsOSPlatform(OSPlatform.Linux) then
      CreateProcess.fromRawCommand "xdg-open" [ "http://localhost:8085" ] |> Proc.run |> ignore
    elif RuntimeInformation.IsOSPlatform(OSPlatform.OSX) then
      CreateProcess.fromRawCommand "open" [ "http://localhost:8085" ] |> Proc.run |> ignore

Notes

Some discussion of the issue on stackoverflow:

https://stackoverflow.com/questions/66139159/process-start-being-used-to-launch-browser-but-is-now-deprecated

Thanks to user nh2 who made the suggestion to take a look at how Plotly.NET launches browsers:

https://stackoverflow.com/a/66184603/268581

[Krzysztof-Cieslak]

Thanks a lot!