lxc/image: Only get instance server when --all-projects flag is set

Signed-off-by: Kadin Sayani <kadin.sayani@canonical.com>

lxc/image.go

@@ -14,7 +14,7 @@ import (
 	"github.com/spf13/cobra"
 	"gopkg.in/yaml.v2"
 
-	"github.com/canonical/lxd/client"
+	lxd "github.com/canonical/lxd/client"
 	"github.com/canonical/lxd/shared"
 	"github.com/canonical/lxd/shared/api"
 	cli "github.com/canonical/lxd/shared/cmd"
@@ -1130,8 +1130,10 @@ Column shorthand chars:
 	return cmd
 }
 
-const defaultImagesColumns = "lfpdatsu"
-const defaultImagesColumnsAllProjects = "elfpdatsu"
+const (
+	defaultImagesColumns            = "lfpdatsu"
+	defaultImagesColumnsAllProjects = "elfpdatsu"
+)
 
 func (c *cmdImageList) parseColumns() ([]imageColumn, error) {
 	columnsShorthandMap := map[rune]imageColumn{
@@ -1353,11 +1355,6 @@ func (c *cmdImageList) run(cmd *cobra.Command, args []string) error {
 		return err
 	}
 
-	d, err := c.global.conf.GetInstanceServer(remoteName)
-	if err != nil {
-		return err
-	}
-
 	// Process the filters
 	filters := []string{}
 	if name != "" {
@@ -1378,6 +1375,11 @@ func (c *cmdImageList) run(cmd *cobra.Command, args []string) error {
 
 	var allImages []api.Image
 	if c.flagAllProjects {
+		d, err := c.global.conf.GetInstanceServer(remoteName)
+		if err != nil {
+			return fmt.Errorf("--all-projects flag is not supported for this server: %w", err)
+		}
+
 		allImages, err = d.GetImagesAllProjectsWithFilter(serverFilters)
 		if err != nil {
 			allImages, err = d.GetImagesAllProjects()