fix: executable tab completion

rl.go

@@ -25,9 +25,12 @@ func NewLineReader(prompt string) *LineReader {
 		var completions []string
 		// trim whitespace from ctx
 		ctx = strings.TrimLeft(ctx, " ")
+		if len(ctx) == 0 {
+			return []string{}
+		}
 		fields := strings.Split(ctx, " ")
 		if len(fields) == 0 {
-			return nil
+			return []string{}
 		}
 
 		for aliases[fields[0]] != "" {
@@ -44,6 +47,9 @@ func NewLineReader(prompt string) *LineReader {
 		}
 
 		if len(fields) == 1 {
+			prefixes := []string{"./", "../", "/", "~/"}
+			for _, prefix := range prefixes {
+				if strings.HasPrefix(fields[0], prefix) {
 					fileCompletions := append(completions, readline.FilenameCompleter(query, ctx)...)
 					// filter out executables
 					for _, f := range fileCompletions {
@@ -53,10 +59,9 @@ func NewLineReader(prompt string) *LineReader {
 						}
 						completions = append(completions, f)
 					}
-
-			if len(completions) != 0 {
 					return completions
 				}
+			}
 
 			// filter out executables, but in path
 			for _, dir := range filepath.SplitList(os.Getenv("PATH")) {
@@ -100,7 +105,6 @@ func NewLineReader(prompt string) *LineReader {
 
 				if cmpTbl, ok := luacompleteTable.(*lua.LTable); ok {
 					cmpTbl.ForEach(func(key lua.LValue, value lua.LValue) {
-						// print key and value to stderr for debugging
 						// if key is a number (index), we just check and complete that
 						if key.Type() == lua.LTNumber {
 							// if we have only 2 fields then this is fine