Merge pull request #36 from hashicorp/plugin_version_default

Add default version

Author: SwampDragons

go.sum

@@ -384,8 +384,6 @@ github.com/hashicorp/packer v1.6.7-0.20210125170305-539638b0f951 h1:p4nxOBaxLlMA
 github.com/hashicorp/packer v1.6.7-0.20210125170305-539638b0f951/go.mod h1:Z3eunaxVQ3XgQ+rW7TEH0T/PRQzCUSyCBUTkm/VL7io=
 github.com/hashicorp/packer v1.6.7-0.20210126105722-aef4ced967ec h1:E3JlWgvQ/PzFx0X5sihNdx9XNhW08GjAbmVqLuHQ51g=
 github.com/hashicorp/packer v1.6.7-0.20210126105722-aef4ced967ec/go.mod h1:2+Vo/c/fA+TD9yFc/h9jQMFm4yG+IymQIr0OdJJOPiE=
-github.com/hashicorp/packer v1.6.7-0.20210205095714-ef4afafde9e9 h1:aN1sliuyaMT4uufsacaaKWmf4DomqBEz+DzYGb6jILw=
-github.com/hashicorp/packer v1.6.7-0.20210205095714-ef4afafde9e9/go.mod h1:MSh0q+aJsRJmBhZtl0SfsOSf0FHPjEiEKgN1guZc0dw=
 github.com/hashicorp/packer v1.6.7-0.20210208125835-f616955ebcb6 h1:sNvdk3PbCgjWavrz3LXGQKQK7opEbDc9YGxZW/PbT5o=
 github.com/hashicorp/packer v1.6.7-0.20210208125835-f616955ebcb6/go.mod h1:7f5ZpTTRG53rQ58BcTADuTnpiBcB3wapuxl4sF2sGMM=
 github.com/hashicorp/packer-plugin-sdk v0.0.6/go.mod h1:Nvh28f+Jmpp2rcaN79bULTouNkGNDRfHckhHKTAXtyU=

version/version.go

@@ -31,6 +31,10 @@ var SDKVersion = InitializePluginVersion(Version, VersionPrerelease)
 // versioning and to make sure that plugins which aren't following proper
 // semantic versioning crash immediately rather than later.
 func InitializePluginVersion(vers, versionPrerelease string) *PluginVersion {
+	if vers == "" {
+		// Defaults to "0.0.0". Useful when binary is created for development purpose.
+		vers = "0.0.0"
+	}
 	pv := PluginVersion{
 		version:           vers,
 		versionPrerelease: versionPrerelease,