use new plugin-specific repo route when installing or updating a single plugin (#4992)

pkg/cmd/grafana-cli/commands/upgrade_command.go

 package commands
 
 import (
+	"github.com/fatih/color"
+	"github.com/grafana/grafana/pkg/cmd/grafana-cli/log"
 	s "github.com/grafana/grafana/pkg/cmd/grafana-cli/services"
 )
 
@@ -14,20 +16,17 @@ func upgradeCommand(c CommandLine) error {
 		return err
 	}
 
-	remotePlugins, err2 := s.ListAllPlugins(c.GlobalString("repo"))
+	v, err2 := s.GetPlugin(localPlugin.Id, c.GlobalString("repo"))
 
 	if err2 != nil {
 		return err2
 	}
 
-	for _, v := range remotePlugins.Plugins {
-		if localPlugin.Id == v.Id {
-			if ShouldUpgrade(localPlugin.Info.Version, v) {
-				s.RemoveInstalledPlugin(pluginsDir, pluginName)
-				return InstallPlugin(localPlugin.Id, "", c)
-			}
-		}
+	if ShouldUpgrade(localPlugin.Info.Version, v) {
+		s.RemoveInstalledPlugin(pluginsDir, pluginName)
+		return InstallPlugin(localPlugin.Id, "", c)
 	}
 
+	log.Infof("%s %s is up to date \n", color.GreenString("✔"), localPlugin.Id)
 	return nil
 }

pkg/cmd/grafana-cli/services/services.go

@@ -44,7 +44,7 @@ func ReadPlugin(pluginDir, pluginName string) (m.InstalledPlugin, error) {
 	}
 
 	if res.Id == "" {
-		return m.InstalledPlugin{}, errors.New("could not read find plugin " + pluginName)
+		return m.InstalledPlugin{}, errors.New("could not find plugin " + pluginName + " in " + pluginDir)
 	}
 
 	return res, nil
@@ -69,13 +69,21 @@ func RemoveInstalledPlugin(pluginPath, id string) error {
 }
 
 func GetPlugin(pluginId, repoUrl string) (m.Plugin, error) {
-	resp, _ := ListAllPlugins(repoUrl)
+	fullUrl := repoUrl + "/repo/" + pluginId
 
-	for _, i := range resp.Plugins {
-		if i.Id == pluginId {
-			return i, nil
-		}
+	res, err := goreq.Request{Uri: fullUrl, MaxRedirects: 3}.Do()
+	if err != nil {
+		return m.Plugin{}, err
+	}
+	if res.StatusCode != 200 {
+		return m.Plugin{}, fmt.Errorf("Could not access %s statuscode %v", fullUrl, res.StatusCode)
 	}
 
-	return m.Plugin{}, errors.New("could not find plugin named \"" + pluginId + "\"")
+	var resp m.Plugin
+	err = res.Body.FromJsonTo(&resp)
+	if err != nil {
+		return m.Plugin{}, errors.New("Could not load plugin data")
+	}
+
+	return resp, nil
 }