feat: add service-account subcommand

xrhidgen can now generate service-account records using the
'service-account' subcommand.

cmd/xrhidgen/main.go

@@ -1,25 +1,26 @@
 // xrhidgen generates X-Rh-Identity records.
 //
-// Usage:
-//   xrhidgen [flags] <subcommand>
-
-// xrhidgen can be used to generate JSON records suitable for passing in to
-// the X-Rh-Identity header. Each subcommand will generate a record of the
-// specified type. Any flag set will be inserted instead of a random value.
-// All remaining fields will be filled with a suitably random value.
-
-// SUBCOMMANDS
-//   user       generate a user identity JSON record
-//   internal   generate an internal identity JSON record
-//   system     generate a system identity JSON record
-//   associate  generate an associate identity JSON record
-
-// FLAGS
-//   -account-number ...          set the identity.account_number field (string)
-//   -auth-type ...               set the identity.authtype field (string)
-//   -employe-account-number ...  set the identity.employee_account_number field (string)
-//   -org-id ...                  set the identity.org_id field (string)
-//   -type ...                    set the identity.type field (string)
+//	USAGE
+//	  xrhidgen [flags] <subcommand>
+//
+//	xrhidgen can be used to generate JSON records suitable for passing in to
+//	the X-Rh-Identity header. Each subcommand will generate a record of the
+//	specified type. Any flag set will be inserted instead of a random value.
+//	All remaining fields will be filled with a suitably random value.
+//
+//	SUBCOMMANDS
+//	  user             generate a user identity JSON record
+//	  internal         generate an internal identity JSON record
+//	  system           generate a system identity JSON record
+//	  associate        generate an associate identity JSON record
+//	  service-account  generate a service account identity JSON record
+//
+//	FLAGS
+//	  -account-number value          set the identity.account_number field (string)
+//	  -auth-type value               set the identity.authtype field (string)
+//	  -employe-account-number value  set the identity.employee_account_number field (string)
+//	  -org-id value                  set the identity.org_id field (string)
+//	  -type value                    set the identity.type field (string)
 package main
 
 import (
@@ -61,6 +62,7 @@ func main() {
 			internalCommand,
 			systemCommand,
 			associateCommand,
+			serviceAccountCommand,
 		},
 		Exec: func(context.Context, []string) error {
 			return flag.ErrHelp

cmd/xrhidgen/service_account.go

@@ -0,0 +1,53 @@
+package main
+
+import (
+	"context"
+	"encoding/json"
+	"flag"
+	"fmt"
+
+	"github.com/peterbourgon/ff/v3/ffcli"
+	"github.com/subpop/xrhidgen"
+)
+
+var serviceAccountFlags struct {
+	clientID StringFlag
+	username StringFlag
+}
+
+func NewServiceAccountFlagSet(name string, errorHandling flag.ErrorHandling) *flag.FlagSet {
+	fs := flag.NewFlagSet(name, errorHandling)
+
+	fs.Var(&serviceAccountFlags.clientID, "client-id", "set the identity.service_account.client_id field (string)")
+	fs.Var(&serviceAccountFlags.username, "username", "set the identity.service_account.username field (string)")
+
+	return fs
+}
+
+var serviceAccountCommand = &ffcli.Command{
+	Name:       "service-account",
+	ShortUsage: "service-account [flags]",
+	ShortHelp:  "generate a service account identity JSON record",
+	LongHelp:   WordWrap("Generate a service account identity record, populating fields with values provided by the matching flag. Any omitted flags will have their corresponding fields populated with a suitable random value", 72),
+	FlagSet:    NewServiceAccountFlagSet("service-account", flag.ExitOnError),
+	Exec: func(ctx context.Context, args []string) error {
+		serviceAccount := xrhidgen.ServiceAccount{
+			ClientID: serviceAccountFlags.clientID.Value,
+			Username: serviceAccountFlags.username.Value,
+		}
+
+		id, err := xrhidgen.NewServiceAccountIdentity(mainIdentity(), serviceAccount)
+		if err != nil {
+			return err
+		}
+
+		data, err := json.Marshal(id)
+		if err != nil {
+			return fmt.Errorf("cannot marshal data: %w", err)
+		}
+
+		fmt.Println(string(data))
+
+		return nil
+	},
+}