refactor(shell): some small code adjustments

Author: andreynering

internal/shell/shell.go

@@ -100,7 +100,7 @@ func (s *Shell) Exec(ctx context.Context, command string) (string, string, error
 	s.mu.Lock()
 	defer s.mu.Unlock()
 
-	return s.execPOSIX(ctx, command)
+	return s.exec(ctx, command)
 }
 
 // GetWorkingDir returns the current working directory
@@ -228,8 +228,8 @@ func (s *Shell) blockHandler() func(next interp.ExecHandlerFunc) interp.ExecHand
 	}
 }
 
-// execPOSIX executes commands using POSIX shell emulation (cross-platform)
-func (s *Shell) execPOSIX(ctx context.Context, command string) (string, string, error) {
+// exec executes commands using a cross-platform shell interpreter.
+func (s *Shell) exec(ctx context.Context, command string) (string, string, error) {
 	line, err := syntax.NewParser().Parse(strings.NewReader(command), "")
 	if err != nil {
 		return "", "", fmt.Errorf("could not parse command: %w", err)
@@ -249,11 +249,10 @@ func (s *Shell) execPOSIX(ctx context.Context, command string) (string, string,
 
 	err = runner.Run(ctx, line)
 	s.cwd = runner.Dir
-	s.env = []string{}
 	for name, vr := range runner.Vars {
 		s.env = append(s.env, fmt.Sprintf("%s=%s", name, vr.Str))
 	}
-	s.logger.InfoPersist("POSIX command finished", "command", command, "err", err)
+	s.logger.InfoPersist("command finished", "command", command, "err", err)
 	return stdout.String(), stderr.String(), err
 }