feat(golang-rewrite): create shimversions command

* Enable `shim_versions_command.bats` tests
* Create `asdf shimversions` command

cmd/cmd.go

@@ -184,6 +184,13 @@ func Execute(version string) {
 					return reshimCommand(logger, args.Get(0), args.Get(1))
 				},
 			},
+			{
+				Name: "shimversions",
+				Action: func(cCtx *cli.Context) error {
+					args := cCtx.Args()
+					return shimVersionsCommand(logger, args.Get(0))
+				},
+			},
 			{
 				Name: "uninstall",
 				Action: func(cCtx *cli.Context) error {
@@ -793,6 +800,23 @@ func reshimCommand(logger *log.Logger, tool, version string) (err error) {
 	return reshimToolVersion(conf, tool, version, os.Stdout, os.Stderr)
 }
 
+func shimVersionsCommand(logger *log.Logger, shimName string) error {
+	conf, err := config.LoadConfig()
+	if err != nil {
+		logger.Printf("error loading config: %s", err)
+		return err
+	}
+
+	shimPath := shims.Path(conf, shimName)
+	toolVersions, err := shims.GetToolsAndVersionsFromShimFile(shimPath)
+	for _, toolVersion := range toolVersions {
+		for _, version := range toolVersion.Versions {
+			fmt.Printf("%s %s", toolVersion.Name, version)
+		}
+	}
+	return err
+}
+
 // This function is a whole mess and needs to be refactored
 func whichCommand(logger *log.Logger, command string) error {
 	conf, err := config.LoadConfig()

internal/shims/shims.go

@@ -63,7 +63,7 @@ func FindExecutable(conf config.Config, shimName, currentDirectory string) (stri
 		return "", false, UnknownCommandError{shim: shimName}
 	}
 
-	toolVersions, err := getToolsAndVersionsFromShimFile(shimPath)
+	toolVersions, err := GetToolsAndVersionsFromShimFile(shimPath)
 	if err != nil {
 		return "", false, err
 	}
@@ -154,6 +154,21 @@ func GetExecutablePath(conf config.Config, plugin plugins.Plugin, shimName, vers
 	return "", fmt.Errorf("executable not found")
 }
 
+// GetToolsAndVersionsFromShimFile takes a file path and parses out the tools
+// and versions present in it and returns them as a slice containing info in
+// ToolVersions structs.
+func GetToolsAndVersionsFromShimFile(shimPath string) (versions []toolversions.ToolVersions, err error) {
+	contents, err := os.ReadFile(shimPath)
+	if err != nil {
+		return versions, err
+	}
+
+	versions = parse(string(contents))
+	versions = toolversions.Unique(versions)
+
+	return versions, err
+}
+
 func getCustomExecutablePath(conf config.Config, plugin plugins.Plugin, shimName, version string) (string, error) {
 	var stdOut strings.Builder
 	var stdErr strings.Builder
@@ -169,18 +184,6 @@ func getCustomExecutablePath(conf config.Config, plugin plugins.Plugin, shimName
 	return filepath.Join(installPath, stdOut.String()), err
 }
 
-func getToolsAndVersionsFromShimFile(shimPath string) (versions []toolversions.ToolVersions, err error) {
-	contents, err := os.ReadFile(shimPath)
-	if err != nil {
-		return versions, err
-	}
-
-	versions = parse(string(contents))
-	versions = toolversions.Unique(versions)
-
-	return versions, err
-}
-
 // RemoveAll removes all shim scripts
 func RemoveAll(conf config.Config) error {
 	shimDir := filepath.Join(conf.DataDir, shimDirName)
@@ -270,7 +273,7 @@ func Write(conf config.Config, plugin plugins.Plugin, version, executablePath st
 	versions := []toolversions.ToolVersions{{Name: plugin.Name, Versions: []string{version}}}
 
 	if _, err := os.Stat(shimPath); err == nil {
-		oldVersions, err := getToolsAndVersionsFromShimFile(shimPath)
+		oldVersions, err := GetToolsAndVersionsFromShimFile(shimPath)
 		if err != nil {
 			return err
 		}

main_test.go

@@ -83,9 +83,9 @@ func TestBatsTests(t *testing.T) {
 	//  runBatsFile(t, dir, "shim_exec.bats")
 	//})
 
-	//t.Run("shim_versions_command", func(t *testing.T) {
-	//  runBatsFile(t, dir, "shim_versions_command.bats")
-	//})
+	t.Run("shim_versions_command", func(t *testing.T) {
+		runBatsFile(t, dir, "shim_versions_command.bats")
+	})
 
 	t.Run("uninstall_command", func(t *testing.T) {
 		runBatsFile(t, dir, "uninstall_command.bats")

test/shim_versions_command.bats

@@ -22,7 +22,7 @@ teardown() {
   run asdf install dummy 1.0
   run asdf reshim dummy
 
-  run asdf shim-versions dummy
+  run asdf shimversions dummy
   [ "$status" -eq 0 ]
 
   echo "$output" | grep "dummy 3.0"