Client

For this example we create an EC2 client.

So the import becomes:

import (
	"context"
	"github.com/aws/aws-sdk-go-v2/service/ec2"
	"github.com/aws/aws-sdk-go-v2/config"
)

Don’t forget the go get….

Main now has

package main

import (
        "context"
        "fmt"
        "github.com/aws/aws-sdk-go-v2/service/ec2"
        "github.com/aws/aws-sdk-go-v2/config"
)

var client *ec2.Client

func init(){
        cfg, err := config.LoadDefaultConfig(context.TODO())
        if err != nil {
                panic("configuration error, " + err.Error())
        }
        client = ec2.NewFromConfig(cfg)

}

func main() {
        fmt.Println("vim-go")
}

  1 package main
  2
  3 import (
  4         "context"
  5         "fmt"
  6         "github.com/aws/aws-sdk-go-v2/service/ec2"
  7         "github.com/aws/aws-sdk-go-v2/config"
  8 )
  9
 10 var client *ec2.Client
 11
 12 func init(){
 13         cfg, err := config.LoadDefaultConfig(context.TODO())
 14         if err != nil {
 15                 panic("configuration error, " + err.Error())
 16         }
 17         client = ec2.NewFromConfig(cfg)
 18
 19 }
 20
 21 func main() {
 22         fmt.Println("vim-go")
 23 }

Because client is defined outside the functions, it is accessible from within the init function and the main function.

It is created as a pointer. Because the type is defined in the imported ec2 module, it is defined with:

 10 var client *ec2.Client

This main program will compile and run, but do nothing useful at the moment. If you work with the vim editor, you get a default print in line 22.

See also

Source

See the full source on github.

Sources