Parca: Add standalone building configuration (#79896)

* Parca: Decouple frontend

* Parca: decouple backend

* Parca: add standalone build process

* Regenerate cue files

* Fix import

* Trigger CI

* Fix test

* Trigger CI

* Trigger CI

pkg/tests/api/plugins/data/expectedListResp.json

@@ -1238,7 +1238,7 @@
       "updated": ""
     },
     "dependencies": {
-      "grafanaDependency": "",
+      "grafanaDependency": "\u003e=10.3.0-0",
       "grafanaVersion": "*",
       "plugins": []
     },
@@ -1618,7 +1618,7 @@
       "updated": ""
     },
     "dependencies": {
-      "grafanaDependency": ">=10.3.0-0",
+      "grafanaDependency": "\u003e=10.3.0-0",
       "grafanaVersion": "*",
       "plugins": []
     },

pkg/tsdb/parca/standalone/datasource.go

@@ -0,0 +1,38 @@
+package main
+
+import (
+	"context"
+
+	"github.com/grafana/grafana-plugin-sdk-go/backend"
+	"github.com/grafana/grafana-plugin-sdk-go/backend/httpclient"
+	"github.com/grafana/grafana-plugin-sdk-go/backend/instancemgmt"
+	"github.com/grafana/grafana/pkg/tsdb/parca"
+)
+
+var (
+	_ backend.QueryDataHandler    = (*Datasource)(nil)
+	_ backend.CheckHealthHandler  = (*Datasource)(nil)
+	_ backend.CallResourceHandler = (*Datasource)(nil)
+)
+
+func NewDatasource(context.Context, backend.DataSourceInstanceSettings) (instancemgmt.Instance, error) {
+	return &Datasource{
+		Service: parca.ProvideService(httpclient.NewProvider()),
+	}, nil
+}
+
+type Datasource struct {
+	Service *parca.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)
+}

pkg/tsdb/parca/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("parca", NewDatasource, datasource.ManageOpts{}); err != nil {
+		log.DefaultLogger.Error(err.Error())
+		os.Exit(1)
+	}
+}