CODEWITHSUNDEEP
haskell
Sean Clark Hess
Sean Clark Hess

Reputation: 16059

Cancel main without closing ghci

I'm working on a web server using Scotty. I can run ghci and keep using :r to get it to reload my code, but if I even run main I cant' restart the web server without killing ghci.

How can I cancel main without closing ghci? Is there a better way to handle web servers and automatically restart them?

Upvotes: 3

Views: 634

Answers (1)

danidiaz
danidiaz

Reputation: 27771

Invoke :set args <arg> ... in ghci to set the arguments that will be returned by System.getArgs.

Then, using the async package, launch the server in ghci with something like a <- async main.

Later invoke cancel a to kill the server.

See also this link that explains how to reload code even while the server is running.

Upvotes: 5

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