[#1587] Do not print build time in `version`

This makes our build more reproducible.
Also print `Component` and `GoVersion`.

Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>

Makefile

@@ -3,7 +3,6 @@ SHELL = bash
 
 REPO ?= $(shell go list -m)
 VERSION ?= $(shell git describe --tags --dirty --always 2>/dev/null || cat VERSION 2>/dev/null || echo "develop")
-BUILD ?= $(shell date -u --iso=seconds)
 DEBUG ?= false
 
 HUB_IMAGE ?= nspccdev/neofs
@@ -36,7 +35,6 @@ $(BINS): $(DIRS) dep
 	CGO_ENABLED=0 \
 	go build -v -trimpath \
 	-ldflags "-X $(REPO)/misc.Version=$(VERSION) \
-	-X $(REPO)/misc.Build=$(BUILD) \
 	-X $(REPO)/misc.Debug=$(DEBUG)" \
 	-o $@ ./cmd/$(notdir $@)
 

cmd/neofs-adm/internal/modules/root.go

@@ -1,7 +1,6 @@
 package modules
 
 import (
-	"fmt"
 	"os"
 
 	"github.com/nspcc-dev/neofs-node/cmd/neofs-adm/internal/modules/config"
@@ -53,11 +52,7 @@ func Execute() error {
 func entryPoint(cmd *cobra.Command, args []string) error {
 	printVersion, err := cmd.Flags().GetBool("version")
 	if err == nil && printVersion {
-		fmt.Printf("Version: %s \nBuild: %s \nDebug: %s\n",
-			misc.Version,
-			misc.Build,
-			misc.Debug,
-		)
+		cmd.Print(misc.BuildInfo("NeoFS Adm"))
 		return nil
 	}
 

cmd/neofs-cli/modules/root.go

@@ -87,12 +87,7 @@ func init() {
 func entryPoint(cmd *cobra.Command, _ []string) {
 	printVersion, _ := cmd.Flags().GetBool("version")
 	if printVersion {
-		cmd.Printf(
-			"Version: %s \nBuild: %s \nDebug: %s\n",
-			misc.Version,
-			misc.Build,
-			misc.Debug,
-		)
+		cmd.Print(misc.BuildInfo("NeoFS CLI"))
 
 		return
 	}

cmd/neofs-ir/main.go

@@ -39,12 +39,7 @@ func main() {
 	flag.Parse()
 
 	if *versionFlag {
-		fmt.Printf(
-			"Version: %s \nBuild: %s \nDebug: %s\n",
-			misc.Version,
-			misc.Build,
-			misc.Debug,
-		)
+		fmt.Print(misc.BuildInfo("NeoFS Inner Ring node"))
 
 		os.Exit(SuccessReturnCode)
 	}
@@ -85,7 +80,6 @@ func main() {
 	exitErr(err)
 
 	log.Info("application started",
-		zap.String("build_time", misc.Build),
 		zap.String("version", misc.Version),
 		zap.String("debug", misc.Debug),
 	)

cmd/neofs-lens/root.go

@@ -1,7 +1,6 @@
 package main
 
 import (
-	"fmt"
 	"os"
 
 	"github.com/nspcc-dev/neofs-node/cmd/neofs-lens/internal/commands/inspect"
@@ -22,11 +21,8 @@ var command = &cobra.Command{
 func entryPoint(cmd *cobra.Command, _ []string) error {
 	printVersion, err := cmd.Flags().GetBool("version")
 	if err == nil && printVersion {
-		fmt.Printf("Version: %s \nBuild: %s \nDebug: %s\n",
-			misc.Version,
-			misc.Build,
-			misc.Debug,
-		)
+		cmd.Print(misc.BuildInfo("NeoFS Lens"))
+
 		return nil
 	}
 

cmd/neofs-node/main.go

@@ -39,12 +39,7 @@ func main() {
 	flag.Parse()
 
 	if *versionFlag {
-		fmt.Printf(
-			"Version: %s \nBuild: %s \nDebug: %s\n",
-			misc.Version,
-			misc.Build,
-			misc.Debug,
-		)
+		fmt.Print(misc.BuildInfo("NeoFS Storage node"))
 
 		os.Exit(SuccessReturnCode)
 	}
@@ -115,7 +110,6 @@ func bootUp(c *cfg) {
 
 func wait(c *cfg) {
 	c.log.Info("application started",
-		zap.String("build_time", misc.Build),
 		zap.String("version", misc.Version),
 		zap.String("debug", misc.Debug),
 	)

misc/build.go

@@ -1,13 +1,25 @@
 package misc
 
+import (
+	"fmt"
+	"runtime"
+)
+
 // These variables are changed in compile time.
 var (
-	// Build is an application build time.
-	Build = "now"
-
 	// Version is an application version.
 	Version = "dev"
 
 	// Debug is an application debug mode flag.
 	Debug = "false"
 )
+
+// BuildInfo returns human-readable information about this binary.
+func BuildInfo(component string) string {
+	return fmt.Sprintf("%s\nVersion: %s \nGoVersion: %s\nDebug: %s\n",
+		component,
+		Version,
+		runtime.Version(),
+		Debug,
+	)
+}