[gentoo-catalyst] [PATCH] lint: fix bad env dict handling

[Mike Frysinger <vapier@gentoo.org>]

By using a kwarg default of {}, the value is retained across multiple
calls (and the linter warns about it).  Use the standard "if None"
style to avoid that.

Also fix the write to the dict passed in by creating a local copy
before we insert BASH_ENV into it.
---
 catalyst/support.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/catalyst/support.py b/catalyst/support.py
index b6705c9..78942a7 100644
--- a/catalyst/support.py
+++ b/catalyst/support.py
@@ -120,11 +120,14 @@ def find_binary(myc):
 	return None
 
 
-def cmd(mycmd, myexc="", env={}, debug=False, fail_func=None):
+def cmd(mycmd, myexc="", env=None, debug=False, fail_func=None):
+	if env is None:
+		env = {}
 	#print "***** cmd()"
 	sys.stdout.flush()
 	args=[BASH_BINARY]
 	if "BASH_ENV" not in env:
+		env = env.copy()
 		env["BASH_ENV"] = "/etc/spork/is/not/valid/profile.env"
 	if debug:
 		args.append("-x")
-- 
2.5.2