Add ruff 0.1.0 capabilities.

Does the following:
 - Updates the pyproject.toml file to only support ruff>=0.1.0
 - Add the `--unsafe-fixes` option to the LSP config

Co-authored-by: Julian Hoßbach <julian.hossbach@gmx.de>

Author: kstrauser

README.md

@@ -17,7 +17,14 @@ pip install python-lsp-ruff
 
 There also exists an [AUR package](https://aur.archlinux.org/packages/python-lsp-ruff).
 
-# Usage
+### When using ruff before version 0.1.0
+Ruff version `0.1.0` introduced API changes that are fixed in Python LSP Ruff `v1.6.0`. To continue with `ruff<0.1.0` please use `v1.5.3`, e.g. using `pip`:
+
+```sh
+pip install "ruff<0.1.0" "python-lsp-ruff==1.5.3"
+```
+
+## Usage
 
 This plugin will disable `pycodestyle`, `pyflakes`, `mccabe` and `pyls_isort` by default, unless they are explicitly enabled in the client configuration.
 When enabled, all linting diagnostics will be provided by `ruff`.
@@ -43,7 +50,7 @@ lspconfig.pylsp.setup {
 }
 ```
 
-# Configuration
+## Configuration
 
 Configuration options can be passed to the python-language-server. If a `pyproject.toml`
 file is present in the project, `python-lsp-ruff` will use these configuration options.
@@ -66,11 +73,12 @@ the valid configuration keys:
  - `pylsp.plugins.ruff.select`: List of error codes to enable.
  - `pylsp.plugins.ruff.extendSelect`: Same as select, but append to existing error codes.
  - `pylsp.plugins.ruff.format`: List of error codes to fix during formatting. The default is `["I"]`, any additional codes are appended to this list.
+ - `pylsp.plugins.ruff.unsafeFixes`: boolean that enables/disables fixes that are marked "unsafe" by `ruff`. `false` by default.
  - `pylsp.plugins.ruff.severities`: Dictionary of custom severity levels for specific codes, see [below](#custom-severities).
 
 For more information on the configuration visit [Ruff's homepage](https://beta.ruff.rs/docs/configuration/).
 
-## Custom severities
+### Custom severities
 
 By default, all diagnostics are marked as warning, except for `"E999"` and all error codes starting with `"F"`, which are displayed as errors.
 This default can be changed through the `pylsp.plugins.ruff.severities` option, which takes the error code as a key and any of

pylsp_ruff/plugin.py

@@ -139,6 +139,20 @@ def pylsp_lint(workspace: Workspace, document: Document) -> List[Dict]:
 
 
 def create_diagnostic(check: RuffCheck, settings: PluginSettings) -> Diagnostic:
+    """
+    Create a LSP diagnostic based on the given RuffCheck object.
+
+    Parameters
+    ----------
+    check : RuffCheck
+        RuffCheck object to convert.
+    settings : PluginSettings
+        Current settings.
+
+    Returns
+    -------
+    Diagnostic
+    """
     # Adapt range to LSP specification (zero-based)
     range = Range(
         start=Position(
@@ -214,6 +228,8 @@ def pylsp_code_actions(
     code_actions = []
     has_organize_imports = False
 
+    settings = load_settings(workspace=workspace, document_path=document.path)
+
     for diagnostic in diagnostics:
         code_actions.append(
             create_disable_code_action(document=document, diagnostic=diagnostic)
@@ -222,6 +238,10 @@ def pylsp_code_actions(
         if diagnostic.data:  # Has fix
             fix = converter.structure(diagnostic.data, RuffFix)
 
+            # Ignore fix if marked as unsafe and unsafe_fixes are disabled
+            if fix.applicability != "safe" and not settings.unsafe_fixes:
+                continue
+
             if diagnostic.code == "I001":
                 code_actions.append(
                     create_organize_imports_code_action(
@@ -236,7 +256,6 @@ def pylsp_code_actions(
                     ),
                 )
 
-    settings = load_settings(workspace=workspace, document_path=document.path)
     checks = run_ruff_check(document=document, settings=settings)
     checks_with_fixes = [c for c in checks if c.fix]
     checks_organize_imports = [c for c in checks_with_fixes if c.code == "I001"]
@@ -458,7 +477,7 @@ def run_ruff(
         p = Popen(cmd, stdin=PIPE, stdout=PIPE, stderr=PIPE)
     (stdout, stderr) = p.communicate(document_source.encode())
 
-    if stderr:
+    if p.returncode != 0:
         log.error(f"Error running ruff: {stderr.decode()}")
 
     return stdout.decode()
@@ -491,8 +510,10 @@ def build_arguments(
     args = []
     # Suppress update announcements
     args.append("--quiet")
+    # Suppress exit 1 when violations were found
+    args.append("--exit-zero")
     # Use the json formatting for easier evaluation
-    args.append("--format=json")
+    args.append("--output-format=json")
     if fix:
         args.append("--fix")
     else:
@@ -510,6 +531,9 @@ def build_arguments(
     if settings.line_length:
         args.append(f"--line-length={settings.line_length}")
 
+    if settings.unsafe_fixes:
+        args.append("--unsafe-fixes")
+
     if settings.exclude:
         args.append(f"--exclude={','.join(settings.exclude)}")
 
@@ -583,6 +607,7 @@ def load_settings(workspace: Workspace, document_path: str) -> PluginSettings:
         return PluginSettings(
             enabled=plugin_settings.enabled,
             executable=plugin_settings.executable,
+            unsafe_fixes=plugin_settings.unsafe_fixes,
             extend_ignore=plugin_settings.extend_ignore,
             extend_select=plugin_settings.extend_select,
             format=plugin_settings.format,

pylsp_ruff/ruff.py

@@ -19,6 +19,7 @@ class Edit:
 class Fix:
     edits: List[Edit]
     message: str
+    applicability: str
 
 
 @dataclass

pylsp_ruff/settings.py

@@ -9,6 +9,7 @@
 class PluginSettings:
     enabled: bool = True
     executable: str = "ruff"
+    unsafe_fixes: bool = False
 
     config: Optional[str] = None
     line_length: Optional[int] = None

pyproject.toml

@@ -13,7 +13,7 @@ readme = "README.md"
 requires-python = ">=3.7"
 license = {text = "MIT"}
 dependencies = [
-  "ruff>=0.0.267,<0.1.0",
+  "ruff>=0.1.0, <0.2.0",
   "python-lsp-server",
   "lsprotocol>=2022.0.0a1",
   "tomli>=1.1.0; python_version < '3.11'",

tests/test_code_actions.py

@@ -115,11 +115,40 @@ def f():
             pass
         """
     )
+    expected_str_safe = dedent(
+        """
+        def f():
+            a = 2
+        """
+    )
+    workspace._config.update(
+        {
+            "plugins": {
+                "ruff": {
+                    "unsafeFixes": True,
+                }
+            }
+        }
+    )
     _, doc = temp_document(codeaction_str, workspace)
     settings = ruff_lint.load_settings(workspace, doc.path)
     fixed_str = ruff_lint.run_ruff_fix(doc, settings)
     assert fixed_str == expected_str
 
+    workspace._config.update(
+        {
+            "plugins": {
+                "ruff": {
+                    "unsafeFixes": False,
+                }
+            }
+        }
+    )
+    _, doc = temp_document(codeaction_str, workspace)
+    settings = ruff_lint.load_settings(workspace, doc.path)
+    fixed_str = ruff_lint.run_ruff_fix(doc, settings)
+    assert fixed_str == expected_str_safe
+
 
 def test_format_document_default_settings(workspace):
     _, doc = temp_document(import_str, workspace)

tests/test_ruff_lint.py

@@ -177,7 +177,8 @@ def f():
     assert call_args == [
         "ruff",
         "--quiet",
-        "--format=json",
+        "--exit-zero",
+        "--output-format=json",
         "--no-fix",
         "--force-exclude",
         f"--stdin-filename={os.path.join(workspace.root_path, '__init__.py')}",