ci: do not include timestamp into buildmeta (#5215)

.github/goreleaser.yaml

@@ -34,7 +34,7 @@ builds:
       - -s -w
       - -X github.com/pomerium/pomerium/internal/version.Version={{.Version}}
       - -X github.com/pomerium/pomerium/internal/version.GitCommit={{.ShortCommit}}
-      - -X github.com/pomerium/pomerium/internal/version.BuildMeta={{.Timestamp}}
+      - -X github.com/pomerium/pomerium/internal/version.Timestamp={{.Timestamp}}
       - -X github.com/pomerium/pomerium/internal/version.ProjectName=pomerium
       - -X github.com/pomerium/pomerium/internal/version.ProjectURL=https://www.pomerium.io
 

internal/version/version.go

@@ -4,7 +4,9 @@ package version
 import (
 	"fmt"
 	"runtime"
+	"strconv"
 	"strings"
+	"time"
 )
 
 var (
@@ -18,10 +20,20 @@ var (
 	GitCommit = ""
 	// BuildMeta specifies release type (dev,rc1,beta,etc)
 	BuildMeta = ""
+	// Timestamp specifies the build time, set by the compiler as UNIX timestamp.
+	Timestamp = ""
 
 	runtimeVersion = runtime.Version()
 )
 
+func BuildTime() string {
+	tm, err := strconv.Atoi(Timestamp)
+	if err != nil {
+		return ""
+	}
+	return time.Unix(int64(tm), 0).UTC().Format(time.RFC3339)
+}
+
 // FullVersion returns a version string.
 func FullVersion() string {
 	var sb strings.Builder

pkg/cmd/pomerium/pomerium.go

@@ -34,10 +34,13 @@ import (
 func Run(ctx context.Context, src config.Source) error {
 	_, _ = maxprocs.Set(maxprocs.Logger(func(s string, i ...any) { log.Debug(context.Background()).Msgf(s, i...) }))
 
-	log.Info(ctx).
+	evt := log.Info(ctx).
 		Str("envoy_version", files.FullVersion()).
-		Str("version", version.FullVersion()).
+		Str("version", version.FullVersion())
-		Msg("cmd/pomerium")
+	if buildTime := version.BuildTime(); buildTime != "" {
+		evt = evt.Str("built", buildTime)
+	}
+	evt.Msg("cmd/pomerium")
 
 	src, err := config.NewLayeredSource(ctx, src, derivecert_config.NewBuilder())
 	if err != nil {