Merge pull request #215 from replicatedhq/laverya/import-version

add a version.Version function that returns the import version

pkg/version/version.go

@@ -2,6 +2,7 @@ package version
 
 import (
 	"fmt"
+	"runtime/debug"
 )
 
 // NOTE: these variables are injected at build time
@@ -10,6 +11,32 @@ var (
 	version, gitSHA, buildTime string
 )
 
+const pvmModuleName = "github.com/replicatedhq/pvmigrate"
+
+func init() {
+	if version == "" {
+		// attempt to get the version from runtime build info
+		// go through all the dependencies to find the pvmigrate module version
+		// failure to read buildinfo is ok, we just won't have a version set
+		bi, ok := debug.ReadBuildInfo()
+		if ok {
+			for _, dep := range bi.Deps {
+				if dep.Path == pvmModuleName {
+					version = dep.Version
+					if dep.Replace != nil {
+						version = dep.Replace.Version
+					}
+					break
+				}
+			}
+		}
+	}
+}
+
+func Version() string {
+	return version
+}
+
 // Print prints the version, git sha and build time.
 func Print() {
 	fmt.Printf("version=%s\nsha=%s\ntime=%s\n", version, gitSHA, buildTime)