use straight.plugin for command plugins

employ/__init__.py

@@ -1 +1,6 @@
 __version__ = "0.1.0"
+from straight.plugin import load
+
+from employ.commands import Command
+
+commands = load("employ.commands", subclasses=Command)

employ/commands/__init__.py

@@ -1,3 +1,22 @@
-__all__ = ["ABCommand", "Command"]
-from employ.commands.base import Command
-from employ.commands.ab import ABCommand
+from pkgutil import extend_path
+__path__ = extend_path(__path__, __name__)
+
+
+class Command(object):
+    name = "command"
+
+    def run(self):
+        raise NotImplementedError()
+
+    def aggregate(self):
+        raise NotImplementedError()
+
+    def command(self):
+        raise NotImplementedError()
+
+    @classmethod
+    def from_config(cls, config):
+        settings = {}
+        if config.has_section(cls.name):
+            settings = dict(config.items(cls.name))
+        return cls(**settings)

employ/commands/base.py

@@ -1,5 +0,0 @@
-class Command(object):
-    name = "command"
-
-    def run(self):
-        raise NotImplementedError()

requirements.txt

@@ -1,2 +1,3 @@
 boto>=2.13.0
 docopt>=0.6.0
+straight.plugin>=1.4.0

setup.py

@@ -10,9 +10,16 @@ setup(
     author="Brett Langdon",
     author_email="brett@blangdon.com",
     packages=find_packages(),
+    namespace_packages=[
+        "employ.commands",
+    ],
     install_requires=[
         "docopt>=0.6.0",
         "boto>=2.13.0",
+        "straight.plugin>=1.4.0",
+    ],
+    scripts=[
+        "bin/employ",
     ],
     setup_requires=[],
     description="Distributed one time command execution and aggregation tool",