Go中同一包中的多个文件

Question

I'm writing my first Go code which among other things, sends an email. After finding out that the package net/smtp only supports Plain Auth (but some providers like outlook doesn't support it), I asked for a solution and got pointed out to https://gist.github.com/andelf/5118732 .

That code works like a charm, but as it's not something written by myself, I would like to add it in a separate file and just reference it in my main.go .

What's the right approach to have multiple files in the same package? I don't want to create a different package just for that code, first because it's not mine, and secondly, because I think it's an "overkill" approach, isn't it?

I thought that as long as the files are in the same directory, I could have many *.go files, but it seems it's not working out. If I just create a file with the content of that gist, the compiler fails because expected package, found import . If I add something like package auth , then it fails because found packages auth (auth.go) and main (main.go)

So, what's the general practice in this situations? Just create packages for everything?

Answer 1

You can have only one package in a directory, and it looks like you don't need a package for this addition, so you can simply put that in a separate file, and add package main at the top. Having a main package and putting everything under it works up to a point. As things get larger, you have to break it up into self-contained packages.