Minimal Go app built with Bazel

BUILD

package(default_visibility = ["//visibility:public"])

load("@io_bazel_rules_go//go:def.bzl", "go_prefix", "go_binary")

go_prefix("helloworld")

go_binary(
    name = "helloworld",
    srcs = ["helloworld.go"],
)

helloworld.go

package main

func main() {
	println("Hello!")
}

WORKSPACE

http_archive(
    name = "io_bazel_rules_go",
    url = "https://github.com/bazelbuild/rules_go/releases/download/0.7.0/rules_go-0.7.0.tar.gz",
    sha256 = "91fca9cf860a1476abdc185a5f675b641b60d3acf0596679a27b580af60bf19c",
)
load("@io_bazel_rules_go//go:def.bzl", "go_rules_dependencies", "go_register_toolchains")
go_rules_dependencies()
go_register_toolchains()