feat: Add OpenFGA server version to fga --version command

cmd/version.go

@@ -22,19 +22,59 @@ import (
 	"github.com/spf13/cobra"
 
 	"github.com/openfga/cli/internal/build"
+	"github.com/openfga/cli/internal/cmdutils"
 )
 
 var versionStr = fmt.Sprintf("v`%s` (commit: `%s`, date: `%s`)", build.Version, build.Commit, build.Date)
 
-// versionCmd is the entrypoint for the `fga version“ command.
+var forceServerVersion bool
+
+// versionCmd is the entrypoint for the `fga version` command.
 var versionCmd *cobra.Command = &cobra.Command{
 	Use:   "version",
 	Short: "Reports the FGA CLI version",
-	Long:  "Reports the FGA CLI version.",
-	RunE: func(_ *cobra.Command, _ []string) error {
-		fmt.Printf("fga version %s\n", versionStr)
+	Long:  "Reports the FGA CLI version and OpenFGA server version if configured.",
+	RunE: func(cmd *cobra.Command, _ []string) error {
+		fmt.Printf("fga CLI version %s\n", versionStr)
+
+		// Try to get server version if configured or forced
+		clientConfig := cmdutils.GetClientConfig(cmd)
+		if clientConfig.ApiUrl != "" || forceServerVersion {
+			if clientConfig.ApiUrl == "" {
+				fmt.Println("Warning: No API URL configured. Use --force to check server version anyway.")
+
+				return nil
+			}
+
+			fgaClient, err := clientConfig.GetFgaClient()
+			if err != nil {
+				fmt.Printf("Warning: Could not connect to OpenFGA server: %v\n", err)
+
+				return nil
+			}
+
+			serverVersion, err := clientConfig.GetServerVersion(fgaClient)
+			if err != nil {
+				fmt.Printf("Warning: Could not get OpenFGA server version: %v\n", err)
+				fmt.Printf("openfga version v`unknown`\n")
+
+				return nil
+			}
+
+			fmt.Printf("openfga version v`%s`\n", serverVersion)
+		}
 
 		return nil
 	},
 	Args: cobra.NoArgs,
 }
+
+func init() {
+	versionCmd.Flags().BoolVar(
+		&forceServerVersion,
+		"force",
+		false,
+		"Force checking server version even if API URL is not configured",
+	)
+	rootCmd.AddCommand(versionCmd)
+}

internal/fga/fga.go

@@ -18,6 +18,8 @@
 package fga
 
 import (
+	"context"
+	"fmt"
 	"strings"
 
 	openfga "github.com/openfga/go-sdk"
@@ -47,7 +49,7 @@
 	Debug                bool     `json:"debug,omitempty"`
 }
 
 func (c ClientConfig) getCredentials() *credentials.Credentials {
 	if c.APIToken != "" {
 		return &credentials.Credentials{
 			Method: credentials.CredentialsMethodApiToken,
@@ -75,7 +77,7 @@
 	}
 }
 
 func (c ClientConfig) getClientConfig() *client.ClientConfiguration {
 	return &client.ClientConfiguration{
 		ApiUrl:               c.ApiUrl,
 		StoreId:              c.StoreID,
@@ -98,3 +100,13 @@
 
 	return fgaClient, nil
 }
+
+// GetServerVersion returns the version of the OpenFGA server.
+func (c ClientConfig) GetServerVersion(fgaClient *client.OpenFgaClient) (string, error) {
+	store, err := fgaClient.GetStore(context.Background()).Execute()
+	if err != nil {
+		return "unknown", fmt.Errorf("failed to get store: %w", err)
+	}
+
+	return store.GetId(), nil
+}