Migrate to Wire for dependency injection (#32289)

Fixes #30144

Co-authored-by: dsotirakis <sotirakis.dim@gmail.com>
Co-authored-by: Marcus Efraimsson <marcus.efraimsson@gmail.com>
Co-authored-by: Ida Furjesova <ida.furjesova@grafana.com>
Co-authored-by: Jack Westbrook <jack.westbrook@gmail.com>
Co-authored-by: Will Browne <wbrowne@users.noreply.github.com>
Co-authored-by: Leon Sorokin <leeoniya@gmail.com>
Co-authored-by: Andrej Ocenas <mr.ocenas@gmail.com>
Co-authored-by: spinillos <selenepinillos@gmail.com>
Co-authored-by: Karl Persson <kalle.persson@grafana.com>
Co-authored-by: Leonard Gram <leo@xlson.com>

pkg/tsdb/testdatasource/testdata.go

@@ -9,37 +9,41 @@ import (
 	"github.com/grafana/grafana/pkg/infra/log"
 	"github.com/grafana/grafana/pkg/plugins/backendplugin"
 	"github.com/grafana/grafana/pkg/plugins/backendplugin/coreplugin"
-	"github.com/grafana/grafana/pkg/registry"
 	"github.com/grafana/grafana/pkg/setting"
 )
 
-func init() {
-	registry.RegisterService(&testDataPlugin{})
-}
-
-type testDataPlugin struct {
-	BackendPluginManager backendplugin.Manager `inject:""`
-	Cfg                  *setting.Cfg          `inject:""`
-	logger               log.Logger
-	scenarios            map[string]*Scenario
-	queryMux             *datasource.QueryTypeMux
-}
-
-func (p *testDataPlugin) Init() error {
-	p.logger = log.New("tsdb.testdata")
-	p.scenarios = map[string]*Scenario{}
-	p.queryMux = datasource.NewQueryTypeMux()
-	p.registerScenarios()
+func ProvideService(cfg *setting.Cfg, manager backendplugin.Manager) (*TestDataPlugin, error) {
 	resourceMux := http.NewServeMux()
-	p.registerRoutes(resourceMux)
+	p := new(resourceMux)
 	factory := coreplugin.New(backend.ServeOpts{
 		QueryDataHandler:    p.queryMux,
 		CallResourceHandler: httpadapter.New(resourceMux),
 		StreamHandler:       newTestStreamHandler(p.logger),
 	})
-	err := p.BackendPluginManager.Register("testdata", factory)
+	err := manager.Register("testdata", factory)
 	if err != nil {
-		p.logger.Error("Failed to register plugin", "error", err)
+		return nil, err
 	}
-	return nil
+
+	return p, nil
+}
+
+func new(resourceMux *http.ServeMux) *TestDataPlugin {
+	p := &TestDataPlugin{
+		logger:    log.New("tsdb.testdata"),
+		scenarios: map[string]*Scenario{},
+		queryMux:  datasource.NewQueryTypeMux(),
+	}
+
+	p.registerScenarios()
+	p.registerRoutes(resourceMux)
+
+	return p
+}
+
+type TestDataPlugin struct {
+	cfg       *setting.Cfg
+	logger    log.Logger
+	scenarios map[string]*Scenario
+	queryMux  *datasource.QueryTypeMux
 }