From 4f589a72777ca1c151bad1807de1edf5f33f07c0 Mon Sep 17 00:00:00 2001
From: Sebastien Bourdeauducq <sb@m-labs.hk>
Date: Tue, 5 Apr 2016 16:09:41 +0800
Subject: [PATCH] artiq_flash: clear error message when bin directory is absent

---
 artiq/frontend/artiq_flash.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/artiq/frontend/artiq_flash.py b/artiq/frontend/artiq_flash.py
index b29128a35..8c0090187 100755
--- a/artiq/frontend/artiq_flash.py
+++ b/artiq/frontend/artiq_flash.py
@@ -72,6 +72,9 @@ def main():
     if opts.dir is None:
         opts.dir = os.path.join(artiq_dir, "binaries",
                                 "{}-{}".format(opts.target, opts.adapter))
+    if not os.path.exists(opts.dir):
+        raise SystemExit("Binaries directory '{}' does not exist"
+                         .format(opts.dir))
 
     conv = False