Introduce service accounts and bootstrap tokens (#22)

internal/command/get/bootstrap_token.go

@@ -0,0 +1,53 @@
+package get
+
+import (
+	"fmt"
+	"github.com/cirruslabs/orchard/internal/bootstraptoken"
+	"github.com/cirruslabs/orchard/internal/config"
+	"github.com/cirruslabs/orchard/pkg/client"
+	"github.com/spf13/cobra"
+)
+
+func newGetBootstrapTokenCommand() *cobra.Command {
+	command := &cobra.Command{
+		Use:   "bootstrap-token",
+		Short: "Retrieve a bootstrap token for the specified service account",
+		RunE:  runGetBootstrapToken,
+		Args:  cobra.ExactArgs(1),
+	}
+
+	return command
+}
+
+func runGetBootstrapToken(cmd *cobra.Command, args []string) error {
+	name := args[0]
+
+	configHandle, err := config.NewHandle()
+	if err != nil {
+		return err
+	}
+
+	defaultContext, err := configHandle.DefaultContext()
+	if err != nil {
+		return err
+	}
+
+	client, err := client.New()
+	if err != nil {
+		return err
+	}
+
+	serviceAccount, err := client.ServiceAccounts().Get(cmd.Context(), name)
+	if err != nil {
+		return err
+	}
+
+	bootstrapToken, err := bootstraptoken.New(defaultContext.Certificate, serviceAccount.Name, serviceAccount.Token)
+	if err != nil {
+		return err
+	}
+
+	fmt.Println(bootstrapToken)
+
+	return nil
+}

internal/command/get/get.go

@@ -0,0 +1,19 @@
+package get
+
+import (
+	"errors"
+	"github.com/spf13/cobra"
+)
+
+var ErrGetFailed = errors.New("get command failed")
+
+func NewCommand() *cobra.Command {
+	command := &cobra.Command{
+		Use:   "get",
+		Short: "Retrieve resources from the controller",
+	}
+
+	command.AddCommand(newGetServiceAccountCommand(), newGetBootstrapTokenCommand())
+
+	return command
+}

internal/command/get/service_account.go

@@ -0,0 +1,70 @@
+package get
+
+import (
+	"fmt"
+	"github.com/cirruslabs/orchard/internal/structpath"
+	"github.com/cirruslabs/orchard/pkg/client"
+	"github.com/gosuri/uitable"
+	"github.com/spf13/cobra"
+	"strings"
+)
+
+func newGetServiceAccountCommand() *cobra.Command {
+	command := &cobra.Command{
+		Use:   "service-account",
+		Short: "Retrieve service account and it's fields",
+		RunE:  runGetServiceAccount,
+		Args:  cobra.ExactArgs(1),
+	}
+
+	return command
+}
+
+func runGetServiceAccount(cmd *cobra.Command, args []string) error {
+	name := args[0]
+
+	client, err := client.New()
+	if err != nil {
+		return err
+	}
+
+	// Ability to retrieve resource fields (e.g. "orchard get service-account workers/token")
+	splits := strings.Split(name, "/")
+	var path []string
+	if len(splits) > 1 {
+		name = splits[0]
+		path = splits[1:]
+	}
+
+	serviceAccount, err := client.ServiceAccounts().Get(cmd.Context(), name)
+	if err != nil {
+		return err
+	}
+
+	// Ability to retrieve resource fields (e.g. "orchard get service-account workers/token")
+	if len(path) != 0 {
+		result, ok := structpath.Lookup(*serviceAccount, path)
+		if !ok {
+			return fmt.Errorf("%w: failed to find the specified field \"%s\" or the field is not a string",
+				ErrGetFailed, strings.Join(path, "/"))
+		}
+
+		fmt.Println(result)
+
+		return nil
+	}
+
+	table := uitable.New()
+
+	table.AddRow("name", serviceAccount.Name)
+
+	var scopeList []string
+	for _, scope := range serviceAccount.Roles {
+		scopeList = append(scopeList, string(scope))
+	}
+	table.AddRow("roles", strings.Join(scopeList, ", "))
+
+	fmt.Println(table)
+
+	return nil
+}