add login command

cmd/hauler/cli/cli.go

@@ -32,6 +32,7 @@ func New() *cobra.Command {
 
 	// Add subcommands
 	addDownload(cmd)
+	addLogin(cmd)
 	addStore(cmd)
 	addServe(cmd)
 	addVersion(cmd)

cmd/hauler/cli/login.go

@@ -0,0 +1,75 @@
+package cli
+
+import (
+	"context"
+	"strings"
+	"os"
+	"io"
+	"fmt"
+	"github.com/spf13/cobra"
+
+	"oras.land/oras-go/pkg/content"
+
+	"github.com/rancherfederal/hauler/pkg/cosign"
+)
+
+type Opts struct {
+	Username  string
+	Password  string
+	PasswordStdin bool
+}
+
+func (o *Opts) AddArgs(cmd *cobra.Command) {
+	f := cmd.Flags()
+	f.StringVarP(&o.Username, "username", "u", "", "Username")
+	f.StringVarP(&o.Password, "password", "p", "", "Password")
+	f.BoolVarP(&o.PasswordStdin, "password-stdin", "", false, "Take the password from stdin")
+}
+
+func addLogin(parent *cobra.Command) {
+	o := &Opts{}
+
+	cmd := &cobra.Command{
+		Use:   "login",
+		Short: "Log in to a registry",
+		Example: `
+# Log in to reg.example.com
+hauler login reg.example.com -u bob -p haulin`,
+		Args:    cobra.ExactArgs(1),
+		RunE: func(cmd *cobra.Command, arg []string) error {
+			ctx := cmd.Context()
+
+			if o.PasswordStdin {
+				contents, err := io.ReadAll(os.Stdin)
+				if err != nil {
+					return err
+				}
+				o.Password = strings.TrimSuffix(string(contents), "\n")
+				o.Password = strings.TrimSuffix(o.Password, "\r")
+			}
+
+			if o.Username == "" && o.Password == "" {
+				return fmt.Errorf("username and password required")
+			}
+
+			return login(ctx, o, arg[0])
+		},
+	}
+	o.AddArgs(cmd)
+
+	parent.AddCommand(cmd)
+}
+
+func login(ctx context.Context, o *Opts, registry string) error {
+	ropts := content.RegistryOptions{
+		Username:  o.Username,
+		Password:  o.Password,
+	}
+
+	err := cosign.RegistryLogin(ctx, nil, registry, ropts)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}

pkg/cosign/cosign.go

@@ -140,17 +140,18 @@ func LoadImages(ctx context.Context, s *store.Layout, registry string, ropts con
 
 // RegistryLogin - performs cosign login
 func RegistryLogin(ctx context.Context, s *store.Layout, registry string, ropts content.RegistryOptions) error {
+	log := log.FromContext(ctx)
 	cosignBinaryPath, err := getCosignPath(ctx)
 	if err != nil {
 		return err
 	}
 
 	cmd := exec.Command(cosignBinaryPath, "login", registry, "-u", ropts.Username, "-p", ropts.Password)
-
 	output, err := cmd.CombinedOutput()
 	if err != nil {
 		return fmt.Errorf("error logging into registry: %v, output: %s", err, output)
 	}
+	log.Infof(strings.Trim(string(output), "\n"))
 
 	return nil
 }