Adds the ability to initialize a package from bonobo init.

bonobo/commands/__init__.py

@@ -1,7 +1,9 @@
 import argparse
+import traceback
 
 from bonobo import settings, logging
 from bonobo.commands.base import BaseCommand, BaseGraphCommand
+from bonobo.util.errors import print_error
 
 logger = logging.get_logger()
 
@@ -52,4 +54,9 @@ def entrypoint(args=None):
 
     # Get command handler, execute, rince.
     command = commands[parsed_args.pop('command')]
-    command(**parsed_args)
+
+    try:
+        command(**parsed_args)
+    except Exception as exc:
+        print_error(exc, traceback.format_exc())
+        return 255

bonobo/commands/init.py

@@ -12,9 +12,12 @@ class InitCommand(BaseCommand):
     def add_arguments(self, parser):
         parser.add_argument('filename')
         parser.add_argument('--force', '-f', default=False, action='store_true')
-        parser.add_argument('--template', '-t', choices=self.TEMPLATES, default='default')
 
-    def handle(self, *, template, filename, force=False):
+        target_group = parser.add_mutually_exclusive_group(required=True)
+        target_group.add_argument('--template', '-t', choices=self.TEMPLATES, default='default')
+        target_group.add_argument('--package', '-p', action='store_true', default=False)
+
+    def create_file_from_template(self, *, template, filename):
         template_name = template
         name, ext = os.path.splitext(filename)
         if ext != '.py':
@@ -24,10 +27,46 @@ class InitCommand(BaseCommand):
         env = Environment(loader=loader)
         template = env.get_template(template_name + '.py-tpl')
 
-        if os.path.exists(filename) and not force:
-            raise FileExistsError('Target filename already exists, use --force to override.')
-
         with open(filename, 'w+') as f:
             f.write(template.render(name=name))
 
         self.logger.info('Generated {} using template {!r}.'.format(filename, template_name))
+
+    def create_package(self, *, filename):
+        name, ext = os.path.splitext(filename)
+        if ext != '':
+            raise ValueError('Package names should not have an extension.')
+
+        try:
+            import medikit.commands
+        except ImportError as exc:
+            raise ImportError(
+                'To initialize a package, you need to install medikit (pip install --upgrade medikit).') from exc
+
+        package_name = os.path.basename(filename)
+        medikit.commands.handle_init(os.path.join(os.getcwd(), filename, 'Projectfile'), name=package_name,
+                                     requirements=['bonobo'])
+
+        self.logger.info('Generated "{}" package with medikit.'.format(package_name))
+        self.create_file_from_template(template='default', filename=os.path.join(filename, package_name, '__main__.py'))
+
+        print('Your "{}" package has been created.'.format(package_name))
+        print()
+        print('Install it...')
+        print()
+        print('    pip install --editable {}'.format(filename))
+        print()
+        print('Then maybe run the example...')
+        print()
+        print('    python -m {}'.format(package_name))
+        print()
+        print('Enjoy!')
+
+    def handle(self, *, template, filename, package=False, force=False):
+        if os.path.exists(filename) and not force:
+            raise FileExistsError('Target filename already exists, use --force to override.')
+
+        if package:
+            self.create_package(filename=filename)
+        else:
+            self.create_file_from_template(template=template, filename=filename)