refactor structure and print git commit in version

Signed-off-by: Antonio Murdaca <runcom@redhat.com>

Makefile

@@ -21,10 +21,13 @@ ifeq ($(INTERACTIVE), 1)
 endif
 DOCKER_RUN_DOCKER := $(DOCKER_FLAGS) "$(DOCKER_IMAGE)"
 
+GIT_COMMIT := $(shell git rev-parse HEAD 2> /dev/null || true)
+LDFLAGS := "-X github.com/projectatomic/skopeo.GitCommit=${GIT_COMMIT} ${LDFLAGS}"
+
 all: man binary
 
 binary:
-	go build -o ${DEST}skopeo .
+	go build -ldflags ${LDFLAGS} -o ${DEST}skopeo ./cmd/skopeo
 
 build-container:
 	docker build ${DOCKER_BUILD_ARGS} -t "$(DOCKER_IMAGE)" .

docker.go

@@ -1,4 +1,4 @@
-package main
+package skopeo
 
 import (
 	"crypto/tls"

inspect.go

@@ -1,69 +0,0 @@
-package main
-
-import (
-	"encoding/json"
-	"fmt"
-	"strings"
-
-	"github.com/Sirupsen/logrus"
-	"github.com/codegangsta/cli"
-	pkgInspect "github.com/projectatomic/skopeo/docker/inspect"
-	"github.com/projectatomic/skopeo/types"
-)
-
-var inspectCmd = cli.Command{
-	Name:      "inspect",
-	Usage:     "inspect images on a registry",
-	ArgsUsage: ``,
-	Flags: []cli.Flag{
-		cli.BoolFlag{
-			Name:  "raw",
-			Usage: "output raw manifest",
-		},
-	},
-	Action: func(c *cli.Context) {
-		if c.Bool("raw") {
-			img, err := parseImage(c.Args().First())
-			if err != nil {
-				logrus.Fatal(err)
-			}
-			// TODO(runcom): this is not falling back to v1
-			// TODO(runcom): hardcoded schema 2 version 1
-			b, err := img.RawManifest("2-1")
-			if err != nil {
-				logrus.Fatal(err)
-			}
-			fmt.Println(string(b))
-			return
-		}
-		// get the Image interface before inspecting...utils.go parseImage
-		imgInspect, err := inspect(c)
-		if err != nil {
-			logrus.Fatal(err)
-		}
-		out, err := json.Marshal(imgInspect)
-		if err != nil {
-			logrus.Fatal(err)
-		}
-		fmt.Println(string(out))
-	},
-}
-
-func inspect(c *cli.Context) (types.ImageManifest, error) {
-	var (
-		imgInspect types.ImageManifest
-		err        error
-		name       = c.Args().First()
-	)
-
-	switch {
-	case strings.HasPrefix(name, types.DockerPrefix):
-		imgInspect, err = pkgInspect.GetData(c, strings.Replace(name, "docker://", "", -1))
-		if err != nil {
-			return nil, err
-		}
-	default:
-		return nil, fmt.Errorf("%s image is invalid, please use 'docker://'", name)
-	}
-	return imgInspect, nil
-}

layers.go

@@ -1,22 +0,0 @@
-package main
-
-import (
-	"github.com/Sirupsen/logrus"
-	"github.com/codegangsta/cli"
-)
-
-// TODO(runcom): document args and usage
-var layersCmd = cli.Command{
-	Name:      "layers",
-	Usage:     "get images layers",
-	ArgsUsage: ``,
-	Action: func(context *cli.Context) {
-		img, err := parseImage(context.Args().First())
-		if err != nil {
-			logrus.Fatal(err)
-		}
-		if err := img.Layers(context.Args().Tail()...); err != nil {
-			logrus.Fatal(err)
-		}
-	},
-}

main.go

@@ -1,57 +0,0 @@
-package main
-
-import (
-	"os"
-
-	"github.com/Sirupsen/logrus"
-	"github.com/codegangsta/cli"
-	"github.com/docker/docker/cliconfig"
-)
-
-const (
-	version = "0.1.12-dev"
-	usage   = "interact with registries"
-)
-
-func main() {
-	app := cli.NewApp()
-	app.Name = "skopeo"
-	app.Version = version
-	app.Usage = usage
-	// TODO(runcom)
-	//app.EnableBashCompletion = true
-	app.Flags = []cli.Flag{
-		cli.BoolFlag{
-			Name:  "debug",
-			Usage: "enable debug output",
-		},
-		cli.StringFlag{
-			Name:  "username",
-			Value: "",
-			Usage: "registry username",
-		},
-		cli.StringFlag{
-			Name:  "password",
-			Value: "",
-			Usage: "registry password",
-		},
-		cli.StringFlag{
-			Name:  "docker-cfg",
-			Value: cliconfig.ConfigDir(),
-			Usage: "Docker's cli config for auth",
-		},
-	}
-	app.Before = func(c *cli.Context) error {
-		if c.GlobalBool("debug") {
-			logrus.SetLevel(logrus.DebugLevel)
-		}
-		return nil
-	}
-	app.Commands = []cli.Command{
-		inspectCmd,
-		layersCmd,
-	}
-	if err := app.Run(os.Args); err != nil {
-		logrus.Fatal(err)
-	}
-}

utils.go

@@ -1,4 +1,4 @@
-package main
+package skopeo
 
 import (
 	"fmt"
@@ -7,7 +7,7 @@ import (
 	"github.com/projectatomic/skopeo/types"
 )
 
-func parseImage(img string) (types.Image, error) {
+func ParseImage(img string) (types.Image, error) {
 	switch {
 	case strings.HasPrefix(img, types.DockerPrefix):
 		return parseDockerImage(strings.TrimPrefix(img, dockerPrefix))

version.go

@@ -0,0 +1,5 @@
+package skopeo
+
+const Version = "0.1.12-dev"
+
+var GitCommit = ""