Preparing an Offline Golang Development Environment

Image by vek0 from Pixabay

I need to perform some quite extensive deployment tasks in an air-gapped environment. My approach will be automation, automation, and automation achieved with magefile and sshkit.

However since it's air-gapped, we will need to prepare our toolings first.

Offline Golang Module Dependency

Let’s prepare the module dependencies and prepackage them with “go vendor”.

go init mod airgap-packages
mkdir magefiles
cd magefiles
touch mods.go main.go

In the mods.go, includes all the required dependency modules,

package main
import (
 _ "github.com/dsnet/try"
 _ "github.com/magefile/mage/mg"
 _ "github.com/zhiminwen/magelib/tunnel"
 _ "github.com/zhiminwen/magetool/shellkit"
 _ "github.com/zhiminwen/magetool/sshkit"
 _ "github.com/zhiminwen/quote"
 _ "gopkg.in/yaml.v2"
)

Create a skeleton main program,

package main
import (
 "os"
 "github.com/dsnet/try"
 "github.com/zhiminwen/magetool/sshkit"
)
var bastion *sshkit.SSHClient
func init() {
  os.Setenv("MAGEFILE_VERBOSE", "true")
  bastion =…