feat(plugins): made panels work as plugins

pkg/api/frontendsettings.go

@@ -106,9 +106,18 @@ func getFrontendSettingsMap(c *middleware.Context) (map[string]interface{}, erro
 		defaultDatasource = "-- Grafana --"
 	}
 
+	panels := map[string]interface{}{}
+	for _, panel := range plugins.Panels {
+		panels[panel.Type] = map[string]interface{}{
+			"module": panel.Module,
+			"name":   panel.Name,
+		}
+	}
+
 	jsonObj := map[string]interface{}{
 		"defaultDatasource": defaultDatasource,
 		"datasources":       datasources,
+		"panels":            panels,
 		"appSubUrl":         setting.AppSubUrl,
 		"allowOrgCreate":    (setting.AllowUserOrgCreate && c.IsSignedIn) || c.IsGrafanaAdmin,
 		"buildInfo": map[string]interface{}{

pkg/plugins/models.go

@@ -15,6 +15,13 @@ type DataSourcePlugin struct {
 	StaticRootConfig   *StaticRootConfig      `json:"staticRoot"`
 }
 
+type PanelPlugin struct {
+	Type             string            `json:"type"`
+	Name             string            `json:"name"`
+	Module           string            `json:"module"`
+	StaticRootConfig *StaticRootConfig `json:"staticRoot"`
+}
+
 type StaticRootConfig struct {
 	Url  string `json:"url"`
 	Path string `json:"path"`

pkg/plugins/plugins.go

@@ -14,6 +14,7 @@ import (
 
 var (
 	DataSources     map[string]DataSourcePlugin
+	Panels          []PanelPlugin
 	ExternalPlugins []ExternalPlugin
 	StaticRoutes    []*StaticRootConfig
 )
@@ -27,6 +28,7 @@ func Init() error {
 	DataSources = make(map[string]DataSourcePlugin)
 	ExternalPlugins = make([]ExternalPlugin, 0)
 	StaticRoutes = make([]*StaticRootConfig, 0)
+	Panels = make([]PanelPlugin, 0)
 
 	scan(path.Join(setting.StaticRootPath, "app/plugins"))
 	checkExternalPluginPaths()
@@ -124,6 +126,21 @@ func (scanner *PluginScanner) loadPluginJson(pluginJsonFilePath string) error {
 		addStaticRoot(p.StaticRootConfig, currentDir)
 	}
 
+	if pluginType == "panel" {
+		p := PanelPlugin{}
+		reader.Seek(0, 0)
+		if err := jsonParser.Decode(&p); err != nil {
+			return err
+		}
+
+		if p.Type == "" {
+			return errors.New("Did not find type property in plugin.json")
+		}
+
+		Panels = append(Panels, p)
+		addStaticRoot(p.StaticRootConfig, currentDir)
+	}
+
 	if pluginType == "external" {
 		p := ExternalPlugin{}
 		reader.Seek(0, 0)