Init order within a package

Question

I have files:

main/
    a.go
    b.go
    c.go

a.go:

package main
import "fmt"

func init(){
    fmt.Println("a")
}

func main(){}

b.go:

package main
import "fmt"

func init(){
    fmt.Println("b")
}

c.go:

package main
import "fmt"

func init(){
    fmt.Println("c")
}

In what order will the strings be outputted?

Answer 1

The order that the respective filenames were passed to the Go compiler.

The Go spec says "build systems are encouraged to present multiple files belonging to the same package in lexical file name order to a compiler" so it's a safe bet that go build does exactly that, and the inits will run in A-B-C order.