options: Split-out registration of preliminary options

This is in preparation for having separate `ArgumentParser`s for
preliminary and the remaining options.

src/flake8/main/application.py

@@ -50,6 +50,7 @@ class Application(object):
         self.option_manager = manager.OptionManager(
             prog="flake8", version=flake8.__version__
         )
+        options.register_preliminary_options(self.option_manager)
         options.register_default_options(self.option_manager)
         #: The instance of :class:`flake8.options.config.ConfigFileFinder`
         self.config_finder = None  # type: config.ConfigFileFinder

src/flake8/main/options.py

@@ -6,12 +6,65 @@ from flake8.main import debug
 from flake8.main import vcs
 
 
+def register_preliminary_options(option_manager):
+    """Register the preliminary options on our OptionManager.
+
+    The preliminary options include:
+
+    - ``-v``/``--verbose``
+    - ``--output-file``
+    - ``--append-config``
+    - ``--config``
+    - ``--isolated``
+    """
+    add_option = option_manager.add_option
+
+    add_option(
+        "-v",
+        "--verbose",
+        default=0,
+        action="count",
+        help="Print more information about what is happening in flake8."
+        " This option is repeatable and will increase verbosity each "
+        "time it is repeated.",
+    )
+
+    add_option(
+        "--output-file", default=None, help="Redirect report to a file."
+    )
+
+    # Config file options
+
+    add_option(
+        "--append-config",
+        action="append",
+        help="Provide extra config files to parse in addition to the files "
+        "found by Flake8 by default. These files are the last ones read "
+        "and so they take the highest precedence when multiple files "
+        "provide the same option.",
+    )
+
+    add_option(
+        "--config",
+        default=None,
+        help="Path to the config file that will be the authoritative config "
+        "source. This will cause Flake8 to ignore all other "
+        "configuration files.",
+    )
+
+    add_option(
+        "--isolated",
+        default=False,
+        action="store_true",
+        help="Ignore all configuration files.",
+    )
+
+
 def register_default_options(option_manager):
     """Register the default options on our OptionManager.
 
     The default options include:
 
-    - ``-v``/``--verbose``
     - ``-q``/``--quiet``
     - ``--count``
     - ``--diff``
@@ -32,26 +85,13 @@ def register_default_options(option_manager):
     - ``--enable-extensions``
     - ``--exit-zero``
     - ``-j``/``--jobs``
-    - ``--output-file``
     - ``--tee``
-    - ``--append-config``
-    - ``--config``
-    - ``--isolated``
     - ``--benchmark``
     - ``--bug-report``
     """
     add_option = option_manager.add_option
 
     # pep8 options
-    add_option(
-        "-v",
-        "--verbose",
-        default=0,
-        action="count",
-        help="Print more information about what is happening in flake8."
-        " This option is repeatable and will increase verbosity each "
-        "time it is repeated.",
-    )
     add_option(
         "-q",
         "--quiet",
@@ -257,10 +297,6 @@ def register_default_options(option_manager):
         " (Default: %(default)s)",
     )
 
-    add_option(
-        "--output-file", default=None, help="Redirect report to a file."
-    )
-
     add_option(
         "--tee",
         default=False,
@@ -269,32 +305,6 @@ def register_default_options(option_manager):
         help="Write to stdout and output-file.",
     )
 
-    # Config file options
-
-    add_option(
-        "--append-config",
-        action="append",
-        help="Provide extra config files to parse in addition to the files "
-        "found by Flake8 by default. These files are the last ones read "
-        "and so they take the highest precedence when multiple files "
-        "provide the same option.",
-    )
-
-    add_option(
-        "--config",
-        default=None,
-        help="Path to the config file that will be the authoritative config "
-        "source. This will cause Flake8 to ignore all other "
-        "configuration files.",
-    )
-
-    add_option(
-        "--isolated",
-        default=False,
-        action="store_true",
-        help="Ignore all configuration files.",
-    )
-
     # Benchmarking
 
     add_option(

tests/integration/test_aggregator.py

@@ -18,6 +18,7 @@ def optmanager():
         prog='flake8',
         version='3.0.0',
     )
+    options.register_preliminary_options(option_manager)
     options.register_default_options(option_manager)
     return option_manager