[WIP] Write a golang cli

.gitignore

@@ -3,4 +3,5 @@ ec2gaming.bat
 scripts/ec2gaming-permissionpolicy.json
 scripts/ec2gaming.ovpn
 scripts/ec2gaming.rdp
+ec2gaming
 

constants.go

@@ -0,0 +1,8 @@
+package main
+
+var (
+	ProductDescriptionWindows = "Windows"
+	InstanceType              = "g2.2xlarge"
+	UsWest1                   = "us-west-1"
+	UsWest2                   = "us-west-2"
+)

ec2gaming.go

@@ -0,0 +1,36 @@
+package main
+
+import (
+	"fmt"
+	"github.com/urfave/cli"
+	"os"
+)
+
+func main() {
+	app := cli.NewApp()
+	app.Name = "ec2gaming"
+	app.Usage = "macOS EC2 Gaming with Steam In-Home Streaming"
+	app.Commands = []cli.Command{
+		{
+			Name:  "start",
+			Usage: "starts instance, VPN and Steam",
+			Action: func(*cli.Context) error {
+				spotPrice, err := fmt.Println(SpotPrice())
+				fmt.Println(spotPrice)
+				return err
+			},
+		},
+		{
+			Name:  "stop",
+			Usage: "stops instance & vpn",
+			Action: func(*cli.Context) error {
+				fmt.Println("stop")
+				return nil
+
+			},
+		},
+	}
+
+	app.Run(os.Args)
+
+}

spot_price.go

@@ -0,0 +1,60 @@
+package main
+
+import (
+	"fmt"
+	"github.com/aws/aws-sdk-go/aws"
+	"github.com/aws/aws-sdk-go/aws/session"
+	"github.com/aws/aws-sdk-go/service/ec2"
+	"sort"
+	"strconv"
+	"time"
+)
+
+type SpotPriceHistory []*ec2.SpotPrice
+
+func (spotPriceHistory SpotPriceHistory) Len() int {
+	return len(spotPriceHistory)
+}
+
+func (spotPriceHistory SpotPriceHistory) Less(i, j int) bool {
+	price1, err := strconv.ParseFloat(*spotPriceHistory[i].SpotPrice, 32)
+	if err != nil {
+		panic(err)
+	}
+	price2, err := strconv.ParseFloat(*spotPriceHistory[j].SpotPrice, 32)
+	if err != nil {
+		panic(err)
+	}
+	return price1 < price2
+}
+
+func (spotPriceHistory SpotPriceHistory) Swap(i, j int) {
+	spotPriceHistory[i], spotPriceHistory[j] = spotPriceHistory[j], spotPriceHistory[i]
+}
+
+func SpotPrice() (string, error) {
+	now := time.Now()
+	then := time.Now().Add(time.Duration(-1) * time.Hour)
+	instanceTypes := []*string{&InstanceType}
+	productDescriptions := []*string{&ProductDescriptionWindows}
+	session, err := session.NewSession()
+	if err != nil {
+		fmt.Println(err)
+		return "", err
+	}
+
+	svc := ec2.New(session, &aws.Config{Region: aws.String(UsWest1)})
+
+	result, err := svc.DescribeSpotPriceHistory(&ec2.DescribeSpotPriceHistoryInput{
+		StartTime:           &then,
+		EndTime:             &now,
+		InstanceTypes:       instanceTypes,
+		ProductDescriptions: productDescriptions,
+	})
+	if err != nil {
+		fmt.Println(err)
+		return "", err
+	}
+	sort.Sort(SpotPriceHistory(result.SpotPriceHistory))
+	return *result.SpotPriceHistory[0].SpotPrice, nil
+}