Add build command

cmd/localcb/main.go

@@ -14,8 +14,9 @@ func main() {
 	app := cli.NewApp()
 	app.Name = "localcb"
 	app.Usage = "Run AWS CodeBuild pipeline directly on your local machine"
-	app.Version = "0.3.0"
+	app.Version = "0.4.0"
 	app.Commands = []cli.Command{
+		codebuild.BuildCommand(),
 		codebuild.RunCommand(),
 	}
 

provider/codebuild/cmd_build.go

@@ -0,0 +1,108 @@
+package codebuild
+
+import (
+	"fmt"
+	"os"
+	"strings"
+	"text/template"
+
+	"github.com/piotrkubisa/localcb/cmd"
+	"github.com/urfave/cli"
+)
+
+var buildFlags = struct {
+	DockerImage cmd.FlagPair
+}{
+	DockerImage: cmd.NewFlagPair("image", "i"),
+}
+
+var buildTemplate = `cd /tmp
+git clone https://github.com/aws/aws-codebuild-docker-images.git
+cd aws-codebuild-docker-images
+cd {{.ImagePath}}
+docker build -t {{.DockerImage}} .
+`
+
+// BuildCommand registers a cli.Command
+func BuildCommand() cli.Command {
+	return cli.Command{
+		Name:      "build",
+		Usage:     "Prepares shell script to build one of the AWS CodeBuild curated Docker image",
+		ArgsUsage: "<docker-image>",
+		Action:    buildCommand,
+	}
+}
+
+func buildCommand(c *cli.Context) error {
+	image := c.Args().Get(0)
+	if image == "" {
+		return fmt.Errorf("Provide name of the docker image, i.e. aws/codebuild/golang:1.10 or golang:1.10")
+	}
+
+	var imagePath string
+	var dockerImage string
+	shortImage := strings.TrimPrefix(image, "aws/codebuild/")
+
+	switch image {
+	case "android-java-8:24.4.1":
+		fallthrough
+	case "android-java-8:26.1.1":
+		fallthrough
+	case "docker:17.09.0":
+		fallthrough
+	case "dot-net:core-1":
+		fallthrough
+	case "dot-net:core-2.1":
+		fallthrough
+	case "dot-net:core-2":
+		fallthrough
+	case "golang:1.10":
+		fallthrough
+	case "java:openjdk-8":
+		fallthrough
+	case "java:openjdk-9":
+		fallthrough
+	case "nodejs:10.1.0":
+		fallthrough
+	case "nodejs:6.3.1":
+		fallthrough
+	case "nodejs:8.11.0":
+		fallthrough
+	case "php:5.6":
+		fallthrough
+	case "php:7.0":
+		fallthrough
+	case "python:2.7.12":
+		fallthrough
+	case "python:3.3.6":
+		fallthrough
+	case "python:3.4.5":
+		fallthrough
+	case "python:3.5.2":
+		fallthrough
+	case "python:3.6.5":
+		fallthrough
+	case "ruby:2.2.5":
+		fallthrough
+	case "ruby:2.3.1":
+		fallthrough
+	case "ruby:2.5.1":
+		fallthrough
+	case "ubuntu-base:14.04":
+		imagePath = "ubuntu/" + strings.Replace(shortImage, ":", "/", 1)
+		dockerImage = "aws/codebuild/" + shortImage
+	default:
+		return fmt.Errorf("Unknown image name (%s), you might need to build it manually", image)
+	}
+
+	tpl, err := template.New("script").Parse(buildTemplate)
+	if err != nil {
+		return err
+	}
+
+	data := struct {
+		ImagePath   string
+		DockerImage string
+	}{imagePath, dockerImage}
+	return tpl.Execute(os.Stdout, data)
+}