Set version to 0.1.0

.gitattributes

@@ -0,0 +1,2 @@
+# Include version information on `git archive'
+/internal/version.go export-subst

cmd/icinga-kubernetes/main.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"flag"
 	_ "github.com/go-sql-driver/mysql"
+	"github.com/icinga/icinga-kubernetes/internal"
 	"github.com/icinga/icinga-kubernetes/pkg/com"
 	"github.com/icinga/icinga-kubernetes/pkg/database"
 	"github.com/icinga/icinga-kubernetes/pkg/periodic"
@@ -17,6 +18,7 @@ import (
 	"k8s.io/client-go/kubernetes"
 	kclientcmd "k8s.io/client-go/tools/clientcmd"
 	"k8s.io/klog/v2"
+	"os"
 	"strings"
 	"time"
 )
@@ -34,6 +36,12 @@ func main() {
 
 	klog.InitFlags(nil)
 
+	flag.BoolFunc("version", "print version and exit", func(_ string) error {
+		internal.Version.Print()
+		os.Exit(0)
+
+		return nil
+	})
 	flag.StringVar(&config, "config", "./config.yml", "path to the config file")
 	flag.Parse()
 

internal/version.go

@@ -0,0 +1,10 @@
+package internal
+
+import (
+	"github.com/icinga/icinga-kubernetes/pkg/version"
+)
+
+// Version contains version and Git commit information.
+//
+// The placeholders are replaced on `git archive` using the `export-subst` attribute.
+var Version = version.Version("Icinga Kubernetes", "0.1.0", "$Format:%(describe)$", "$Format:%H$")