From 98e713d0c97c33afd0ba83473dea7c9b911d68f1 Mon Sep 17 00:00:00 2001
From: Marcel Ludwig <marcel.ludwig@avenga.com>
Date: Fri, 29 Jan 2021 16:49:18 +0100
Subject: [PATCH] Add version command

---
 Dockerfile                |  2 +-
 command/cmd.go            |  2 ++
 command/version.go        | 25 +++++++++++++++++++++++++
 config/runtime/version.go |  3 +++
 main.go                   |  5 +++++
 5 files changed, 36 insertions(+), 1 deletion(-)
 create mode 100644 command/version.go

diff --git a/Dockerfile b/Dockerfile
index 1592470ed..dd7bd07d2 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -8,7 +8,7 @@ ENV GOFLAGS="-mod=vendor" \
 
 RUN go generate && \
 	CGO_ENABLED=0 go build -v \
-	-ldflags "-X ${VERSION_PACKAGE}.VersionName=`git describe --tags --abbrev=0 --exact-match || git symbolic-ref -q --short HEAD` -X ${VERSION_PACKAGE}.BuildName=`git rev-parse --short HEAD`" \
+	-ldflags "-X ${VERSION_PACKAGE}.VersionName=`git describe --tags --abbrev=0 --exact-match || git symbolic-ref -q --short HEAD` -X ${VERSION_PACKAGE}.BuildName=`git rev-parse --short HEAD` -X ${VERSION_PACKAGE}.BuildDate=`date +'%F'`" \
 	-o /couper main.go && \
 	ls -lh /couper
 
diff --git a/command/cmd.go b/command/cmd.go
index 1316f937e..2bca3a10e 100644
--- a/command/cmd.go
+++ b/command/cmd.go
@@ -18,6 +18,8 @@ func NewCommand(cmd string) Cmd {
 	switch strings.ToLower(cmd) {
 	case "run":
 		return NewRun(ContextWithSignal(context.Background()))
+	case "version":
+		return NewVersion()
 	default:
 		return nil
 	}
diff --git a/command/version.go b/command/version.go
new file mode 100644
index 000000000..a64173b26
--- /dev/null
+++ b/command/version.go
@@ -0,0 +1,25 @@
+package command
+
+import (
+	"github.com/sirupsen/logrus"
+
+	"github.com/avenga/couper/config"
+	"github.com/avenga/couper/config/runtime"
+)
+
+var _ Cmd = &Version{}
+
+type Version struct{}
+
+func NewVersion() *Version {
+	return &Version{}
+}
+
+func (v Version) Execute(_ Args, _ *config.CouperFile, _ *logrus.Entry) error {
+	println(runtime.VersionName + " " + runtime.BuildDate + " " + runtime.BuildName)
+	return nil
+}
+
+func (v Version) Usage() string {
+	return "couper version"
+}
diff --git a/config/runtime/version.go b/config/runtime/version.go
index b760752dd..f0daa213c 100644
--- a/config/runtime/version.go
+++ b/config/runtime/version.go
@@ -1,6 +1,9 @@
 package runtime
 
+import "time"
+
 var (
+	BuildDate   = time.Now().Format("2006-01-02")
 	BuildName   = "dev"
 	VersionName = "0"
 )
diff --git a/main.go b/main.go
index ae810a57b..f455ab0d4 100644
--- a/main.go
+++ b/main.go
@@ -40,6 +40,11 @@ func realmain(arguments []string) int {
 	cmd := args[0]
 	args = args[1:]
 
+	if cmd == "version" { // global options are not required, fast exit.
+		_ = command.NewCommand(cmd).Execute(args, nil, nil)
+		return 0
+	}
+
 	var filePath, logFormat string
 	set := flag.NewFlagSet("global", flag.ContinueOnError)
 	set.StringVar(&filePath, "f", config.DefaultFileName, "-f ./couper.hcl")