lint: Use standard setup.cfg configuration for pycodestyle.

Signed-off-by: Anders Kaseorg <anders@zulip.com>

setup.cfg

@@ -0,0 +1,71 @@
+[pycodestyle]
+ignore =
+    # Each of these rules are ignored for the explained reason.
+
+    # "multiple spaces before operator"
+    # There are several typos here, but also several instances that are
+    # being used for alignment in dict keys/values using the `dict`
+    # constructor. We could fix the alignment cases by switching to the `{}`
+    # constructor, but it makes fixing this rule a little less
+    # straightforward.
+    E221,
+
+    # 'missing whitespace around arithmetic operator'
+    # This should possibly be cleaned up, though changing some of
+    # these may make the code less readable.
+    E226,
+
+    # New rules in pycodestyle 2.4.0 that we haven't decided whether to comply with yet
+    E252, W504,
+
+    # "multiple spaces after ':'"
+    # This is the `{}` analogue of E221, and these are similarly being used
+    # for alignment.
+    E241,
+
+    # "unexpected spaces around keyword / parameter equals"
+    # Many of these should be fixed, but many are also being used for
+    # alignment/making the code easier to read.
+    E251,
+
+    # "block comment should start with '#'"
+    # These serve to show which lines should be changed in files customized
+    # by the user. We could probably resolve one of E265 or E266 by
+    # standardizing on a single style for lines that the user might want to
+    # change.
+    E265,
+
+    # "too many leading '#' for block comment"
+    # Most of these are there for valid reasons.
+    E266,
+
+    # "expected 2 blank lines after class or function definition"
+    # Zulip only uses 1 blank line after class/function
+    # definitions; the PEP-8 recommendation results in super sparse code.
+    E302, E305,
+
+    # "module level import not at top of file"
+    # Most of these are there for valid reasons, though there might be a
+    # few that could be eliminated.
+    E402,
+
+    # "line too long"
+    # Zulip is a bit less strict about line length, and has its
+    # own check for this (see max_length)
+    E501,
+
+    # "do not assign a lambda expression, use a def"
+    # Fixing these would probably reduce readability in most cases.
+    E731,
+
+    # "line break before binary operator"
+    # This is a bug in the `pep8`/`pycodestyle` tool -- it's completely backward.
+    # See https://github.com/PyCQA/pycodestyle/issues/498 .
+    W503,
+
+    # This number will probably be used for the corrected, inverse version of
+    # W503 when that's added: https://github.com/PyCQA/pycodestyle/pull/502
+    # Once that fix lands and we update to a version of pycodestyle that has it,
+    # we'll want the rule; but we might have to briefly ignore it while we fix
+    # existing code.
+    # W504,

tools/lint

@@ -136,13 +136,13 @@ def run() -> None:
 
     @linter_config.lint
     def pep8_1of2() -> int:
-        """Standard Python style linter on 50% of files (config: tools/linter_lib/pep8.py)"""
+        """Standard Python style linter on 50% of files (config: setup.cfg)"""
         failed = check_pep8(list(python_part1))
         return 1 if failed else 0
 
     @linter_config.lint
     def pep8_2of2() -> int:
-        """Standard Python style linter on other 50% of files (config: tools/linter_lib/pep8.py)"""
+        """Standard Python style linter on other 50% of files (config: setup.cfg)"""
         failed = check_pep8(list(python_part2))
         return 1 if failed else 0
 

tools/linter_lib/pep8.py

@@ -1,79 +1,8 @@
 from typing import List
 
-from zulint.linters import run_pycodestyle
+from zulint.linters import run_command
+from zulint.printer import colors
 
 
 def check_pep8(files: List[str]) -> bool:
-    ignored_rules = [
-        # Each of these rules are ignored for the explained reason.
-
-        # "multiple spaces before operator"
-        # There are several typos here, but also several instances that are
-        # being used for alignment in dict keys/values using the `dict`
-        # constructor. We could fix the alignment cases by switching to the `{}`
-        # constructor, but it makes fixing this rule a little less
-        # straightforward.
-        'E221',
-
-        # 'missing whitespace around arithmetic operator'
-        # This should possibly be cleaned up, though changing some of
-        # these may make the code less readable.
-        'E226',
-
-        # New rules in pycodestyle 2.4.0 that we haven't decided whether to comply with yet
-        'E252', 'W504',
-
-        # "multiple spaces after ':'"
-        # This is the `{}` analogue of E221, and these are similarly being used
-        # for alignment.
-        'E241',
-
-        # "unexpected spaces around keyword / parameter equals"
-        # Many of these should be fixed, but many are also being used for
-        # alignment/making the code easier to read.
-        'E251',
-
-        # "block comment should start with '#'"
-        # These serve to show which lines should be changed in files customized
-        # by the user. We could probably resolve one of E265 or E266 by
-        # standardizing on a single style for lines that the user might want to
-        # change.
-        'E265',
-
-        # "too many leading '#' for block comment"
-        # Most of these are there for valid reasons.
-        'E266',
-
-        # "expected 2 blank lines after class or function definition"
-        # Zulip only uses 1 blank line after class/function
-        # definitions; the PEP-8 recommendation results in super sparse code.
-        'E302', 'E305',
-
-        # "module level import not at top of file"
-        # Most of these are there for valid reasons, though there might be a
-        # few that could be eliminated.
-        'E402',
-
-        # "line too long"
-        # Zulip is a bit less strict about line length, and has its
-        # own check for this (see max_length)
-        'E501',
-
-        # "do not assign a lambda expression, use a def"
-        # Fixing these would probably reduce readability in most cases.
-        'E731',
-
-        # "line break before binary operator"
-        # This is a bug in the `pep8`/`pycodestyle` tool -- it's completely backward.
-        # See https://github.com/PyCQA/pycodestyle/issues/498 .
-        'W503',
-
-        # This number will probably be used for the corrected, inverse version of
-        # W503 when that's added: https://github.com/PyCQA/pycodestyle/pull/502
-        # Once that fix lands and we update to a version of pycodestyle that has it,
-        # we'll want the rule; but we might have to briefly ignore it while we fix
-        # existing code.
-        # 'W504',
-    ]
-
-    return run_pycodestyle(files, ignored_rules)
+    return run_command("pep8", next(colors), ["pycodestyle", "--", *files]) != 0