Initial varlink implementation

Signed-off-by: baude <bbaude@redhat.com>

Closes: #627
Approved by: mheon

libpod/version.go

@@ -0,0 +1,50 @@
+package libpod
+
+import (
+	"runtime"
+	"strconv"
+
+	"github.com/projectatomic/libpod/cmd/podman/ioprojectatomicpodman"
+	podmanVersion "github.com/projectatomic/libpod/version"
+)
+
+// Overwritten at build time
+var (
+	// GitCommit is the commit that the binary is being built from.
+	// It will be populated by the Makefile.
+	GitCommit string
+	// BuildInfo is the time at which the binary was built
+	// It will be populated by the Makefile.
+	BuildInfo string
+)
+
+//Version is an output struct for varlink
+type Version struct {
+	ioprojectatomicpodman.VarlinkInterface
+	Version   string
+	GoVersion string
+	GitCommit string
+	Built     int64
+	OsArch    string
+}
+
+// GetVersion returns a VersionOutput struct for varlink and podman
+func GetVersion() (Version, error) {
+	var err error
+	var buildTime int64
+	if BuildInfo != "" {
+		// Converts unix time from string to int64
+		buildTime, err = strconv.ParseInt(BuildInfo, 10, 64)
+
+		if err != nil {
+			return Version{}, err
+		}
+	}
+	return Version{
+		Version:   podmanVersion.Version,
+		GoVersion: runtime.Version(),
+		GitCommit: GitCommit,
+		Built:     buildTime,
+		OsArch:    runtime.GOOS + "/" + runtime.GOARCH,
+	}, nil
+}