--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/venv/lib/python2.7/site-packages/planemo/config.py	Mon Oct 12 17:43:33 2015 -0400
@@ -0,0 +1,79 @@
+import os
+import yaml
+
+PLANEMO_CONFIG_ENV_PROP = "PLANEMO_GLOBAL_CONFIG_PATH"
+DEFAULT_CONFIG = {
+}
+
+
+def get_default_callback(default, name=None):
+
+    def callback(ctx, param, value):
+        planemo_ctx = ctx.obj
+        config_name = name
+        if config_name is None:
+            config_name = param.name
+
+        return _default_option(planemo_ctx, config_name, value, default)
+
+    return callback
+
+
+# TODO: delete the following stuff.
+def populate_kwds(ctx, options_hash, kwds):
+    """ Iterate over default option hash and use value from
+    ~/.planemo.yml configuration if set or else the specified
+    default. Populate kwds with this configured default value.
+    """
+    for name, default in options_hash.items():
+        _populate_default_output(ctx, name, kwds, default)
+
+
+def _populate_default_output(ctx, kwd_key, kwds, default):
+    kwd_value = kwds.get(kwd_key, None)
+    if kwd_value is None:
+        global_config = ctx.global_config
+        global_config_key = "default_%s" % kwd_key
+        if global_config_key in global_config:
+            default_value = global_config[global_config_key]
+        else:
+            default_value = default
+
+        if default_value:
+            default_value = os.path.abspath(default_value)
+        kwds[kwd_key] = default_value
+
+
+def _default_option(ctx, kwd_key, kwd_value, default):
+    value = kwd_value
+
+    if value is None:
+        global_config = ctx.global_config
+        global_config_key = "default_%s" % kwd_key
+        if global_config_key in global_config:
+            default_value = global_config[global_config_key]
+        else:
+            default_value = default
+
+        value = default_value
+
+    return value
+
+
+def global_config_path(config_path=None):
+    if not config_path:
+        config_path = os.environ.get(
+            PLANEMO_CONFIG_ENV_PROP,
+            "~/.planemo.yml"
+        )
+        config_path = os.path.expanduser(config_path)
+    return config_path
+
+
+def read_global_config(config_path):
+    config_path = global_config_path(config_path)
+    if not os.path.exists(config_path):
+        return DEFAULT_CONFIG
+
+    with open(config_path) as f:
+        return yaml.load(f)