Chore: Use Grafana API to retrieve the public key to validate plugins (#66439)

pkg/plugins/repo/service.go

@@ -8,6 +8,7 @@ import (
 	"path"
 	"strings"
 
+	"github.com/grafana/grafana/pkg/plugins/config"
 	"github.com/grafana/grafana/pkg/plugins/log"
 )
 
@@ -18,9 +19,12 @@ type Manager struct {
 	log log.PrettyLogger
 }
 
-func ProvideService() *Manager {
-	defaultBaseURL := "https://grafana.com/api/plugins"
-	return New(false, defaultBaseURL, log.NewPrettyLogger("plugin.repository"))
+func ProvideService(cfg *config.Cfg) (*Manager, error) {
+	defaultBaseURL, err := url.JoinPath(cfg.GrafanaComURL, "/api/plugins")
+	if err != nil {
+		return nil, err
+	}
+	return New(false, defaultBaseURL, log.NewPrettyLogger("plugin.repository")), nil
 }
 
 func New(skipTLSVerify bool, baseURL string, logger log.PrettyLogger) *Manager {