feat: add wutta top-level command with make-uuid subcommand

i think it only makes sense to have an "opinion" for command line
interface in this project, and we probably need more `wutta`
subcommands too but we'll see.

main motivation for this currently is to allow poser apps to define
their own CLI, in particular e.g. `poser install`

tests/cli/test_base.py

@@ -0,0 +1,39 @@
+# -*- coding: utf-8; -*-
+
+import os
+from unittest import TestCase
+from unittest.mock import MagicMock
+
+import typer
+
+from wuttjamaican.conf import WuttaConfig
+from wuttjamaican.cli import base as mod
+
+
+here = os.path.dirname(__file__)
+example_conf = os.path.join(here, 'example.conf')
+
+
+class TestMakeCliConfig(TestCase):
+
+    def test_basic(self):
+        ctx = MagicMock(params={'config_paths': [example_conf]})
+        config = mod.make_cli_config(ctx)
+        self.assertIsInstance(config, WuttaConfig)
+        self.assertEqual(config.files_read, [example_conf])
+
+
+class TestTyperCallback(TestCase):
+
+    def test_basic(self):
+        ctx = MagicMock(params={'config_paths': [example_conf]})
+        mod.typer_callback(ctx)
+        self.assertIsInstance(ctx.wutta_config, WuttaConfig)
+        self.assertEqual(ctx.wutta_config.files_read, [example_conf])
+
+
+class TestMakeTyper(TestCase):
+
+    def test_basic(self):
+        typr = mod.make_typer()
+        self.assertIsInstance(typr, typer.Typer)

tests/cli/test_make_uuid.py

@@ -0,0 +1,20 @@
+# -*- coding: utf-8; -*-
+
+import os
+from unittest import TestCase
+from unittest.mock import MagicMock, patch
+
+from wuttjamaican.cli import make_uuid as mod
+
+
+here = os.path.dirname(__file__)
+example_conf = os.path.join(here, 'example.conf')
+
+
+class TestMakeUuid(TestCase):
+
+    def test_basic(self):
+        ctx = MagicMock(params={'config_paths': [example_conf]})
+        with patch.object(mod, 'sys') as sys:
+            mod.make_uuid(ctx)
+            sys.stdout.write.assert_called_once()