From cbcb69a39ce7ceb300d5a5588258b7f8c0c0664d Mon Sep 17 00:00:00 2001
From: polykernel <81340136+polykernel@users.noreply.github.com>
Date: Sun, 20 Mar 2022 11:39:36 -0400
Subject: [PATCH] nix: allow whitespace characters before command in repl

Before this change, processLine always uses the first character
as the start of the line. This cause whitespaces to matter at the
beginning of the line whereas it does not matter anywhere else.

This commit trims leading white spaces of the string line so that
subsequent operations can be performed on the string without explicitly
tracking starting and ending indices of the string.
---
 src/nix/repl.cc | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/nix/repl.cc b/src/nix/repl.cc
index 916353d8c..1f9d4fb4e 100644
--- a/src/nix/repl.cc
+++ b/src/nix/repl.cc
@@ -396,6 +396,7 @@ StorePath NixRepl::getDerivationPath(Value & v) {
 
 bool NixRepl::processLine(std::string line)
 {
+    line = trim(line);
     if (line == "") return true;
 
     _isInterrupted = false;