Make ANSIBLE_NOCOWS configurable

	nocows = 1 in ansible.cfg
	or old environment variable ANSIBLE_NOCOWS=1
add to ansible.cfg example

examples/ansible.cfg

@@ -125,6 +125,10 @@ lookup_plugins     = /usr/share/ansible_plugins/lookup_plugins
 vars_plugins       = /usr/share/ansible_plugins/vars_plugins
 filter_plugins     = /usr/share/ansible_plugins/filter_plugins
 
+# set to 1 if you don't want cowsay support. Alternatively, set ANSIBLE_NOCOWS=1
+# in your environment
+# nocows           = 1
+
 [paramiko_connection]
 
 # nothing to configure yet

lib/ansible/callbacks.py

@@ -23,9 +23,10 @@ import subprocess
 import random
 import fnmatch
 from ansible.color import stringc
+import ansible.constants as C
 
 cowsay = None
-if os.getenv("ANSIBLE_NOCOWS") is not None:
+if C.ANSIBLE_NOCOWS is not None:
     cowsay = None
 elif os.path.exists("/usr/bin/cowsay"):
     cowsay = "/usr/bin/cowsay"

lib/ansible/constants.py

@@ -103,6 +103,7 @@ DEFAULT_CONNECTION_PLUGIN_PATH = shell_expand_path(get_config(p, DEFAULTS, 'conn
 DEFAULT_LOOKUP_PLUGIN_PATH     = shell_expand_path(get_config(p, DEFAULTS, 'lookup_plugins',     'ANSIBLE_LOOKUP_PLUGINS', '/usr/share/ansible_plugins/lookup_plugins'))
 DEFAULT_VARS_PLUGIN_PATH     = shell_expand_path(get_config(p, DEFAULTS, 'vars_plugins',     'ANSIBLE_VARS_PLUGINS', '/usr/share/ansible_plugins/vars_plugins'))
 DEFAULT_FILTER_PLUGIN_PATH     = shell_expand_path(get_config(p, DEFAULTS, 'filter_plugins',     'ANSIBLE_FILTER_PLUGINS', '/usr/share/ansible_plugins/filter_plugins'))
+ANSIBLE_NOCOWS         = get_config(p, DEFAULTS, 'nocows',        'ANSIBLE_NOCOWS',        None)
 
 # non-configurable things
 DEFAULT_SUDO_PASS         = None