Add support for helmfile version command (#854)

issue: https://linear.app/cloudposse/issue/DEV-2844/atmos-helmfile-version-does-not-work

Co-authored-by: Andriy Knysh <[email protected]>

internal/exec/helmfile.go

@@ -54,6 +54,10 @@ func ExecuteHelmfile(info schema.ConfigAndStacksInfo) error {
 		return nil
 	}
 
+	if info.SubCommand == "version" {
+		return ExecuteShellCommand(cliConfig, "helmfile", []string{info.SubCommand}, "", nil, false, info.RedirectStdErr)
+	}
+
 	info, err = ProcessStacks(cliConfig, info, true, true)
 	if err != nil {
 		return err

internal/exec/utils.go

@@ -661,22 +661,19 @@ func processArgsAndFlags(componentType string, inputArgsAndFlags []string) (sche
 	var indexesToRemove []int
 
 	// For commands like `atmos terraform clean` and `atmos terraform plan`, show the command help
-	if len(inputArgsAndFlags) == 1 {
+	if len(inputArgsAndFlags) == 1 && inputArgsAndFlags[0] != "version" {
 		info.SubCommand = inputArgsAndFlags[0]
 		info.NeedHelp = true
 		return info, nil
 	}
-
-	// https://github.com/roboll/helmfile#cli-reference
-	var globalOptionsFlagIndex int
-
-	// For commands like `atmos terraform clean` and `atmos terraform plan`, show the command help
-	if len(inputArgsAndFlags) == 1 {
+	if len(inputArgsAndFlags) == 1 && inputArgsAndFlags[0] == "version" {
 		info.SubCommand = inputArgsAndFlags[0]
-		info.NeedHelp = true
 		return info, nil
 	}
 
+	// https://github.com/roboll/helmfile#cli-reference
+	var globalOptionsFlagIndex int
+
 	for i, arg := range inputArgsAndFlags {
 		if arg == cfg.GlobalOptionsFlag {
 			globalOptionsFlagIndex = i + 1