Add default options

This feature was implemented with feedback from Aleks Kamko
<aykamko@gmail.com> and Casey Rodarmor <casey@rodarmor.com>.

3 files changed, 36 insertions, 8 deletions

diff --git a/dotbot/context.py b/dotbot/context.py
new file mode 100644
index 0000000..b2dbd6c
--- /dev/null
+++ b/dotbot/context.py
@@ -0,0 +1,23 @@
+import copy
+
+class Context(object):
+    '''
+    Contextual data and information for plugins.
+    '''
+
+    def __init__(self, base_directory):
+        self._base_directory = base_directory
+        self._defaults = {}
+        pass
+
+    def set_base_directory(self, base_directory):
+        self._base_directory = base_directory
+
+    def base_directory(self):
+        return self._base_directory
+
+    def set_defaults(self, defaults):
+        self._defaults = defaults
+
+    def defaults(self):
+        return copy.deepcopy(self._defaults)
diff --git a/dotbot/dispatcher.py b/dotbot/dispatcher.py
index 79231a0..cc07435 100644
--- a/dotbot/dispatcher.py
+++ b/dotbot/dispatcher.py
@@ -1,26 +1,30 @@
 import os
 from .plugin import Plugin
 from .messenger import Messenger
+from .context import Context
 
 class Dispatcher(object):
     def __init__(self, base_directory):
         self._log = Messenger()
-        self._set_base_directory(base_directory)
+        self._setup_context(base_directory)
         self._load_plugins()
 
-    def _set_base_directory(self, base_directory):
+    def _setup_context(self, base_directory):
         path = os.path.abspath(os.path.realpath(
             os.path.expanduser(base_directory)))
-        if os.path.exists(path):
-            self._base_directory = path
-        else:
+        if not os.path.exists(path):
             raise DispatchError('Nonexistent base directory')
+        self._context = Context(path)
 
     def dispatch(self, tasks):
         success = True
         for task in tasks:
             for action in task:
                 handled = False
+                if action == 'defaults':
+                    self._context.set_defaults(task[action]) # replace, not update
+                    handled = True
+                    # keep going, let other plugins handle this if they want
                 for plugin in self._plugins:
                     if plugin.can_handle(action):
                         try:
@@ -36,7 +40,7 @@ class Dispatcher(object):
         return success
 
     def _load_plugins(self):
-        self._plugins = [plugin(self._base_directory)
+        self._plugins = [plugin(self._context)
             for plugin in Plugin.__subclasses__()]
 
 class DispatchError(Exception):
diff --git a/dotbot/plugin.py b/dotbot/plugin.py
index a79639e..56d4da8 100644
--- a/dotbot/plugin.py
+++ b/dotbot/plugin.py
@@ -1,12 +1,13 @@
 from .messenger import Messenger
+from .context import Context
 
 class Plugin(object):
     '''
     Abstract base class for commands that process directives.
     '''
 
-    def __init__(self, base_directory):
-        self._base_directory = base_directory
+    def __init__(self, context):
+        self._context = context
         self._log = Messenger()
 
     def can_handle(self, directive):