[#552] cmd/node: Implement error checker with details

Implement function `fatalOnErrDetails` similar to `fatalOnErr` but accepting
string details that are written to log output. Use the function everywhere
in application code without wrapping in an if-else statement.

Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>

cmd/neofs-node/grpc.go

@@ -22,9 +22,7 @@ func initGRPC(c *cfg) {
 
 	if c.cfgGRPC.tlsEnabled {
 		creds, err := credentials.NewServerTLSFromFile(c.cfgGRPC.tlsCertFile, c.cfgGRPC.tlsKeyFile)
-		if err != nil {
+		fatalOnErrDetails("could not read credentials from file", err)
-			fatalOnErr(fmt.Errorf("could not read credentionals from file: %w", err))
-		}
 
 		serverOpts = append(serverOpts, grpc.Creds(creds))
 	}

cmd/neofs-node/main.go

@@ -3,6 +3,7 @@ package main
 import (
 	"context"
 	"flag"
+	"fmt"
 	"log"
 
 	"github.com/nspcc-dev/neofs-node/misc"
@@ -11,12 +12,20 @@ import (
 	"go.uber.org/zap"
 )
 
+// prints err to standard logger and calls os.Exit(1).
 func fatalOnErr(err error) {
 	if err != nil {
 		log.Fatal(err)
 	}
 }
 
+// prints err with details to standard logger and calls os.Exit(1).
+func fatalOnErrDetails(details string, err error) {
+	if err != nil {
+		log.Fatal(fmt.Errorf("%s: %w", details, err))
+	}
+}
+
 func main() {
 	configFile := flag.String("config", "", "path to config")
 	flag.Parse()

cmd/neofs-node/netmap.go

@@ -2,7 +2,6 @@ package main
 
 import (
 	"bytes"
-	"fmt"
 
 	netmapSDK "github.com/nspcc-dev/neofs-api-go/pkg/netmap"
 	netmapV2 "github.com/nspcc-dev/neofs-api-go/v2/netmap"
@@ -111,9 +110,7 @@ func bootstrapNode(c *cfg) {
 	initState(c)
 
 	err := c.cfgNetmap.wrapper.AddPeer(c.toOnlineLocalNodeInfo())
-	if err != nil {
+	fatalOnErrDetails("bootstrap error", err)
-		fatalOnErr(fmt.Errorf("bootstrap error: %w", err))
-	}
 }
 
 func addNetmapNotificationHandler(c *cfg, sTyp string, h event.Handler) {
@@ -138,14 +135,10 @@ func setNetmapNotificationParser(c *cfg, sTyp string, p event.Parser) {
 
 func initState(c *cfg) {
 	epoch, err := c.cfgNetmap.wrapper.Epoch()
-	if err != nil {
+	fatalOnErrDetails("could not initialize current epoch number", err)
-		fatalOnErr(fmt.Errorf("could not initialize current epoch number: %w", err))
-	}
 
 	ni, err := c.netmapLocalNodeState(epoch)
-	if err != nil {
+	fatalOnErrDetails("could not init network state", err)
-		fatalOnErr(fmt.Errorf("could not init network state: %w", err))
-	}
 
 	c.handleNodeInfoStatus(ni)