Plugins: Add simple plugin sources service (#63814)

add simple plugin sources svc

pkg/plugins/manager/sources/sources.go

@@ -0,0 +1,53 @@
+package sources
+
+import (
+	"context"
+	"path/filepath"
+
+	"github.com/grafana/grafana/pkg/infra/log"
+	"github.com/grafana/grafana/pkg/plugins"
+	"github.com/grafana/grafana/pkg/plugins/config"
+	"github.com/grafana/grafana/pkg/setting"
+)
+
+type Service struct {
+	gCfg *setting.Cfg
+	cfg  *config.Cfg
+	log  log.Logger
+}
+
+func ProvideService(gCfg *setting.Cfg, cfg *config.Cfg) *Service {
+	return &Service{
+		gCfg: gCfg,
+		cfg:  cfg,
+		log:  log.New("plugin.sources"),
+	}
+}
+
+func (s *Service) List(_ context.Context) []plugins.PluginSource {
+	return []plugins.PluginSource{
+		{Class: plugins.Core, Paths: corePluginPaths(s.gCfg.StaticRootPath)},
+		{Class: plugins.Bundled, Paths: []string{s.gCfg.BundledPluginsPath}},
+		{Class: plugins.External, Paths: append([]string{s.cfg.PluginsPath}, pluginFSPaths(s.cfg.PluginSettings)...)},
+	}
+}
+
+// corePluginPaths provides a list of the Core plugin file system paths
+func corePluginPaths(staticRootPath string) []string {
+	datasourcePaths := filepath.Join(staticRootPath, "app/plugins/datasource")
+	panelsPath := filepath.Join(staticRootPath, "app/plugins/panel")
+	return []string{datasourcePaths, panelsPath}
+}
+
+// pluginSettingPaths provides plugin file system paths defined in cfg.PluginSettings
+func pluginFSPaths(ps map[string]map[string]string) []string {
+	var pluginSettingDirs []string
+	for _, s := range ps {
+		path, exists := s["path"]
+		if !exists || path == "" {
+			continue
+		}
+		pluginSettingDirs = append(pluginSettingDirs, path)
+	}
+	return pluginSettingDirs
+}