add build time

Dockerfile

@@ -6,10 +6,12 @@ RUN docker/backend-build-pre-setup.sh
 RUN apk add git gcc g++ libc-dev
 RUN VERSION=`grep '"version": ' package.json | awk -F ':' '{print $2}' | tr -d ' ' | tr -d ',' | tr -d '"'` \
   && COMMIT_HASH=$(git rev-parse --short HEAD) \
+  && BUILD_UNIXTIME="$(date '+%s')" \
+  && VERSION_FLAGS="-X github.com/mayswind/lab/pkg/version.Version=${VERSION} -X github.com/mayswind/lab/pkg/version.CommitHash=${COMMIT_HASH} -X github.com/mayswind/lab/pkg/version.BuildUnixTime=${BUILD_UNIXTIME}" \
   && GOOS=linux \
   && GOARCH=amd64 \
   && CGO_ENABLED=1 \
-  && go build -a -v -i -trimpath -ldflags "-w -linkmode external -extldflags '-static' -X main.version=${VERSION} -X main.commitHash=${COMMIT_HASH}" -o lab lab.go
+  && go build -a -v -i -trimpath -ldflags "-w -linkmode external -extldflags '-static' ${VERSION_FLAGS}" -o lab lab.go
 RUN chmod +x lab
 
 # Build frontend files

lab.go

@@ -1,23 +1,20 @@
 package main
 
 import (
-	"fmt"
 	"log"
 	"os"
 
 	"github.com/urfave/cli/v2"
 
 	"github.com/mayswind/lab/cmd"
+	"github.com/mayswind/lab/pkg/version"
 )
 
-var version string
-var commitHash string
-
 func main() {
 	app := &cli.App{
 		Name:    "lab",
 		Usage:   "A lightweight account book app hosted by yourself.",
-		Version: getVersion(),
+		Version: version.GetFullVersion(),
 		Commands: []*cli.Command{
 			cmd.WebServer,
 			cmd.Database,
@@ -37,17 +34,3 @@ func main() {
 		log.Fatalf("Failed to run lab app with %s: %v", os.Args, err)
 	}
 }
-
-func getVersion() string {
-	fullVersion := "Local Build"
-
-	if version != "" {
-		fullVersion = version
-	}
-
-	if commitHash != "" {
-		fullVersion = fmt.Sprintf("%s (%s)", fullVersion, commitHash)
-	}
-
-	return fullVersion
-}

pkg/version/version.go

@@ -0,0 +1,47 @@
+package version
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/mayswind/lab/pkg/utils"
+)
+
+var (
+	// Version holds the version of this execution program
+	Version string
+
+	// CommitHash holds the git commit hash of this execution program's source code
+	CommitHash string
+
+	// BuildUnixTime holds the time when starting building this execution program
+	BuildUnixTime string
+)
+
+func GetFullVersion() string {
+	fullVersion := "Local Build"
+
+	if Version != "" {
+		fullVersion = Version
+	}
+
+	additionalInfos := make([]string, 0, 2)
+
+	if CommitHash != "" {
+		additionalInfos = append(additionalInfos, "commit " + CommitHash)
+	}
+
+	if BuildUnixTime != "" {
+		unixTime, err := utils.StringToInt64(BuildUnixTime)
+
+		if unixTime > 0 && err == nil {
+			additionalInfos = append(additionalInfos, "build time " + utils.FormatToLongDateTime(utils.ParseFromUnixTime(unixTime)))
+		}
+	}
+
+	if len(additionalInfos) > 0 {
+		fullVersion = fmt.Sprintf("%s (%s)", fullVersion, strings.Join(additionalInfos, ", "))
+	}
+
+	return fullVersion
+}