Chore: Allow to compile testdata backend as a plugin (#75360)

pkg/tsdb/grafana-testdata-datasource/.gitignore

@@ -0,0 +1 @@
+dist/

pkg/tsdb/grafana-testdata-datasource/standalone/datasource.go

@@ -0,0 +1,49 @@
+package main
+
+import (
+	"context"
+
+	"github.com/grafana/grafana-plugin-sdk-go/backend"
+	"github.com/grafana/grafana-plugin-sdk-go/backend/instancemgmt"
+	testdatasource "github.com/grafana/grafana/pkg/tsdb/grafana-testdata-datasource"
+)
+
+var (
+	_ backend.QueryDataHandler   = (*Datasource)(nil)
+	_ backend.CheckHealthHandler = (*Datasource)(nil)
+	_ backend.StreamHandler      = (*Datasource)(nil)
+)
+
+func NewDatasource(context.Context, backend.DataSourceInstanceSettings) (instancemgmt.Instance, error) {
+	return &Datasource{
+		Service: testdatasource.ProvideService(),
+	}, nil
+}
+
+type Datasource struct {
+	Service *testdatasource.Service
+}
+
+func (d *Datasource) QueryData(ctx context.Context, req *backend.QueryDataRequest) (*backend.QueryDataResponse, error) {
+	return d.Service.QueryData(ctx, req)
+}
+
+func (d *Datasource) CallResource(ctx context.Context, req *backend.CallResourceRequest, sender backend.CallResourceResponseSender) error {
+	return d.Service.CallResource(ctx, req, sender)
+}
+
+func (d *Datasource) CheckHealth(ctx context.Context, req *backend.CheckHealthRequest) (*backend.CheckHealthResult, error) {
+	return d.Service.CheckHealth(ctx, req)
+}
+
+func (d *Datasource) SubscribeStream(ctx context.Context, req *backend.SubscribeStreamRequest) (*backend.SubscribeStreamResponse, error) {
+	return d.Service.SubscribeStream(ctx, req)
+}
+
+func (d *Datasource) PublishStream(ctx context.Context, req *backend.PublishStreamRequest) (*backend.PublishStreamResponse, error) {
+	return d.Service.PublishStream(ctx, req)
+}
+
+func (d *Datasource) RunStream(ctx context.Context, req *backend.RunStreamRequest, sender *backend.StreamSender) error {
+	return d.Service.RunStream(ctx, req, sender)
+}

pkg/tsdb/grafana-testdata-datasource/standalone/main.go

@@ -0,0 +1,23 @@
+package main
+
+import (
+	"os"
+
+	"github.com/grafana/grafana-plugin-sdk-go/backend/datasource"
+	"github.com/grafana/grafana-plugin-sdk-go/backend/log"
+)
+
+func main() {
+	// Start listening to requests sent from Grafana. This call is blocking so
+	// it won't finish until Grafana shuts down the process or the plugin choose
+	// to exit by itself using os.Exit. Manage automatically manages life cycle
+	// of datasource instances. It accepts datasource instance factory as first
+	// argument. This factory will be automatically called on incoming request
+	// from Grafana to create different instances of SampleDatasource (per datasource
+	// ID). When datasource configuration changed Dispose method will be called and
+	// new datasource instance created using NewSampleDatasource factory.
+	if err := datasource.Manage("grafana-testdata-datasource", NewDatasource, datasource.ManageOpts{}); err != nil {
+		log.DefaultLogger.Error(err.Error())
+		os.Exit(1)
+	}
+}

pkg/tsdb/grafana-testdata-datasource/testdata.go

@@ -59,3 +59,10 @@ func (s *Service) QueryData(ctx context.Context, req *backend.QueryDataRequest)
 func (s *Service) CallResource(ctx context.Context, req *backend.CallResourceRequest, sender backend.CallResourceResponseSender) error {
 	return s.resourceHandler.CallResource(ctx, req, sender)
 }
+
+func (s *Service) CheckHealth(_ context.Context, _ *backend.CheckHealthRequest) (*backend.CheckHealthResult, error) {
+	return &backend.CheckHealthResult{
+		Status:  backend.HealthStatusOk,
+		Message: "Data source is working",
+	}, nil
+}