Fix: Bug that causes runtime error in "$ gup import"

Changelog.md

@@ -1,6 +1,11 @@
 # Changelog
 All notable changes to this project will be documented in this file. The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/). This project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+# [0.7.4] - 2022-03-13
+## Changed
+- Fix: Bug that causes runtime error in "$ gup import"
+This bug was caused by an insufficient setting of package version information.
+
 # [0.7.2] - 2022-03-06
 ## Changed
 - Fix: "commans" is a misspelling of "commands" (misspell) at cmd/update.go

cmd/export.go

@@ -64,7 +64,7 @@ func validPkgInfo(pkgs []goutil.Package) []goutil.Package {
 			print.Warn("can't get '" + v.Name + "'package path information. old go version binary")
 			continue
 		}
-		result = append(result, goutil.Package{Name: v.Name, ImportPath: v.ImportPath})
+		result = append(result, goutil.Package{Name: v.Name, ImportPath: v.ImportPath, Version: v.Version})
 	}
 	return result
 }

cmd/import.go

@@ -48,5 +48,7 @@ func runImport(cmd *cobra.Command, args []string) int {
 	if len(pkgs) == 0 {
 		print.Fatal("unable to update package: no package information")
 	}
+
+	print.Info("start update based on " + config.FilePath())
 	return update(pkgs, dryRun)
 }

internal/config/config.go

@@ -40,6 +40,7 @@ func ReadConfFile() ([]goutil.Package, error) {
 	pkgs := []goutil.Package{}
 	for _, v := range contents {
 		pkg := goutil.Package{}
+		ver := goutil.Version{Current: "<from gup.conf>", Latest: ""}
 
 		v = deleteComment(v)
 		if isBlank(v) {
@@ -48,6 +49,7 @@ func ReadConfFile() ([]goutil.Package, error) {
 		equalIdx := strings.Index(v, "=")
 		pkg.Name = strings.TrimSpace(v[:equalIdx-1])
 		pkg.ImportPath = strings.TrimSpace(v[equalIdx+1:])
+		pkg.Version = &ver
 		pkgs = append(pkgs, pkg)
 	}
 
@@ -64,6 +66,7 @@ func WriteConfFile(pkgs []goutil.Package) error {
 
 	text := ""
 	for _, v := range pkgs {
+		// lost version information
 		text = text + fmt.Sprintf("%s = %s\n", v.Name, v.ImportPath)
 	}