--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/env/lib/python3.7/site-packages/planemo/config.py	Sat May 02 07:14:21 2020 -0400
@@ -0,0 +1,142 @@
+"""Module defines abstractions for configuring Planemo."""
+
+import os
+
+import aenum
+import click
+import yaml
+
+PLANEMO_CONFIG_ENV_PROP = "PLANEMO_GLOBAL_CONFIG_PATH"
+DEFAULT_CONFIG = {
+}
+
+VALUE_UNSET = object()
+
+
+OptionSource = aenum.Enum(
+    "OptionSource", 'cli profile global_config default'
+)
+
+
+def _default_callback(
+    default, use_global_config=False, resolve_path=False, extra_global_config_vars=[],
+):
+
+    def callback(ctx, param, value):
+        planemo_ctx = ctx.obj
+        param_name = param.name
+        if value is not None:
+            result = value
+            option_source = OptionSource.cli
+        else:
+            result, option_source = _find_default(
+                planemo_ctx,
+                param,
+                use_global_config=use_global_config,
+                extra_global_config_vars=extra_global_config_vars,
+            )
+
+        if result is VALUE_UNSET:
+            result = default
+            option_source = OptionSource.default
+
+        assert option_source is not None
+        assert result is not VALUE_UNSET
+
+        if resolve_path and result is not None:
+            result = os.path.abspath(result)
+
+        planemo_ctx.set_option_source(param_name, option_source)
+        return result
+
+    return callback
+
+
+def _find_default(ctx, param, use_global_config, extra_global_config_vars):
+    if use_global_config:
+        global_config = ctx.global_config
+        global_config_keys = ["default_%s" % param.name] + extra_global_config_vars
+        for global_config_key in global_config_keys:
+            if global_config_key in global_config:
+                default_value = global_config[global_config_key]
+                return default_value, OptionSource.global_config
+
+    return VALUE_UNSET, None
+
+
+def planemo_option(*args, **kwargs):
+    """Extend ``click.option`` with planemo-config aware configuration.
+
+    This extends click.option to use a callback when assigning default
+    values, add ``use_global_config`` keyword argument to allow reading
+    defaults from ~/.planemo.yml, and tracks how parameters are specified
+    using the Planemo Context object.
+    """
+    option_type = kwargs.get("type", None)
+    use_global_config = kwargs.pop("use_global_config", False)
+    use_env_var = kwargs.pop("use_env_var", False)
+    extra_global_config_vars = kwargs.pop("extra_global_config_vars", [])
+
+    default_specified = "default" in kwargs
+    default = None
+    if default_specified:
+        default = kwargs.pop("default")
+
+    if default_specified or use_global_config or use_env_var:
+        outer_callback = kwargs.pop("callback", None)
+
+        def callback(ctx, param, value):
+            resolve_path = option_type and getattr(option_type, "resolve_path", False)
+            result = _default_callback(
+                default,
+                use_global_config=use_global_config,
+                extra_global_config_vars=extra_global_config_vars,
+                resolve_path=resolve_path,
+            )(ctx, param, value)
+
+            if outer_callback is not None:
+                result = outer_callback(ctx, param, result)
+
+            return result
+
+        kwargs["callback"] = callback
+
+    if default_specified:
+        kwargs["default"] = None
+
+    if use_env_var:
+        name = None
+        for arg in args:
+            if arg.startswith("--"):
+                name = arg[len("--"):]
+        assert name
+        kwargs["envvar"] = "PLANEMO_%s" % name.upper()
+
+    option = click.option(*args, **kwargs)
+    return option
+
+
+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.safe_load(f)
+
+
+__all__ = (
+    "global_config_path",
+    "read_global_config",
+    "planemo_option",
+)