How do I make go find my package?

Question

Where should I put my package so that it can be imported by another package?

$ tree
.
├── main.go
└── src
    └── test.go

1 directory, 2 files

$ cat src/test.go 
package test

$ cat main.go 
package main

import "test"

$ go build main.go 
main.go:3:8: import "test": cannot find package

Answer 1

Set your GOPATH. Put your package foo source(s) in GOPATH/src/optional-whatever/foo/*.go and use it in code as

import "optional-whatever/foo"

You don't need to explicitly install foo, the go tool is a build tool, it will do that automagically for you whenever necessary.