Restart Go's net/http server on file-change like Django

Question

I'm trying out Martini, which adds some nice functionality upon Go's basic net/http package.

I was wondering tho. How can I, like Django does too, let the server restart itself on source-file changes? I know how to monitor a file, but I'm not sure how to retrigger the Server within the same process.

I'm guessing to trigger http.ListenAndServe again, but I have a feeling it doesn't go well with instance already running.

Do I need to spawn a subprocess/daemon to get this working?

Phenocryst

Are you talking source file (compiled) changes or resources? For the former you'll need an external process to watch your source since a recompile is needed. For the latter, Martini seems to serve the latest, at least in development mode. – Woolley

Answer 1

Maybe you need gin ?

Made by the creator of Martini.

Talya

Wonderfully simple. Thank you :) – Phenocryst

Gin starts the server in one port, but I'm using the mux router. What is conflicting ports. – Rotator

Gin is not maintained anymore, as you can read in various issues on Github, like here: github.com/codegangsta/gin/issues/90 "This project is abandoned." – Scheldt

Gin is by no means abandoned and its development is ongoing. The have regularly commits – Punk

Answer 2

You may give it a try

Fresh is a command line tool that builds and (re)starts your web application everytime you save a Go or template file.

Careerist

By far the most user-friendly package I've tried to date. Great recommendation! – Valenevalenka

This will make go development fun! – Hime

Fresh is now unmaintained – Actinopod

Answer 3

You'll need to use an external tool that can watch a directory/files and run a command. I'd recommend reflex which is written in Go itself:

(modifying the example in the README):

# Rerun make whenever a .go file changes
reflex -r '\.go$' ./mymartiniapp

Heed