Print records sent to Odoo (#26)

pkg/report/report.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"encoding/json"
 	"fmt"
+	"os"
 	"time"
 
 	"github.com/appuio/appuio-reporting/pkg/odoo"
@@ -104,6 +105,18 @@ func runQuery(ctx context.Context, odooClient OdooClient, prom PromQuerier, args
 		}
 	}
 
+	// print the records to stdout for preview
+	for _, record := range records {
+		m, err := json.Marshal(record)
+		if err != nil {
+			// can't use the logger from the context here, since the required context key is in the main package 🙃
+			// TODO(bastjan) fix the suboptimal and overcomplicated logging setup
+			fmt.Fprintf(os.Stderr, "warning: failed to marshal record for preview: %+v; error: %s\n", record, err)
+			continue
+		}
+		fmt.Fprintf(os.Stdout, "%s\n", m)
+	}
+
 	return multierr.Append(errs, odooClient.SendData(ctx, records))
 }