Add mccabe setting to flake8 (#63)

Author: baco

CONFIGURATION.md

@@ -12,6 +12,7 @@ This server can be configured using the `workspace/didChangeConfiguration` metho
 | `pylsp.plugins.flake8.filename` | `string` | Only check for filenames matching the patterns in this list. | `null` |
 | `pylsp.plugins.flake8.hangClosing` | `boolean` | Hang closing bracket instead of matching indentation of opening bracket's line. | `null` |
 | `pylsp.plugins.flake8.ignore` | `array` of `string` items | List of errors and warnings to ignore (or skip). | `[]` |
+| `pylsp.plugins.flake8.maxComplexity` | `integer` | Maximum allowed complexity threshold. | `null` |
 | `pylsp.plugins.flake8.maxLineLength` | `integer` | Maximum allowed line length for the entirety of this run. | `null` |
 | `pylsp.plugins.flake8.indentSize` | `integer` | Set indentation spaces. | `null` |
 | `pylsp.plugins.flake8.perFileIgnores` | `array` of `string` items | A pairing of filenames and violation codes that defines which violations to ignore in a particular file, for example: `["file_path.py:W305,W304"]`). | `[]` |

pylsp/config/flake8_conf.py

@@ -27,6 +27,7 @@
     ('filename', 'plugins.flake8.filename', list),
     ('hang-closing', 'plugins.flake8.hangClosing', bool),
     ('ignore', 'plugins.flake8.ignore', list),
+    ('max-complexity', 'plugins.flake8.maxComplexity', int),
     ('max-line-length', 'plugins.flake8.maxLineLength', int),
     ('indent-size', 'plugins.flake8.indentSize', int),
     ('select', 'plugins.flake8.select', list),

pylsp/config/schema.json

@@ -60,6 +60,11 @@
       },
       "description": "List of errors and warnings to ignore (or skip)."
     },
+    "pylsp.plugins.flake8.maxComplexity": {
+      "type": "integer",
+      "default": null,
+      "description": "Maximum allowed complexity threshold."
+    },
     "pylsp.plugins.flake8.maxLineLength": {
       "type": ["integer", "null"],
       "default": null,

pylsp/plugins/flake8_lint.py

@@ -61,6 +61,7 @@ def pylsp_lint(workspace, document):
         'filename': settings.get('filename'),
         'hang-closing': settings.get('hangClosing'),
         'ignore': ignores or None,
+        'max-complexity': settings.get('maxComplexity'),
         'max-line-length': settings.get('maxLineLength'),
         'indent-size': settings.get('indentSize'),
         'select': settings.get('select'),