From ccd6c15edbeefe06ed81508f5ab15948bacbb426 Mon Sep 17 00:00:00 2001
From: Mathieu Tarral <mathieu.tarral@f-secure.com>
Date: Wed, 1 Aug 2018 13:54:41 +0300
Subject: [PATCH] use PACKER_CACHE_DIR env var if already set

---
 malboxes/malboxes.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/malboxes/malboxes.py b/malboxes/malboxes.py
index cd86537..bca8f36 100644
--- a/malboxes/malboxes.py
+++ b/malboxes/malboxes.py
@@ -323,7 +323,8 @@ def run_packer(packer_tmpl, args):
 
         flags = ['-var-file={}'.format(f.name)]
 
-        special_env = {'PACKER_CACHE_DIR': DIRS.user_cache_dir}
+        packer_cache_dir = os.getenv('PACKER_CACHE_DIR', DIRS.user_cache_dir)
+        special_env = {'PACKER_CACHE_DIR': packer_cache_dir}
         special_env['TMPDIR'] = DIRS.user_cache_dir
         if DEBUG:
             special_env['PACKER_LOG']  = '1'