Suppress stderr in call to ruff and add ruff formatter

jupyterlab_code_formatter/formatters.py

@@ -456,9 +456,11 @@ def format_code(self, code: str, notebook: bool, args: List[str] = [], **options
 
 
 class RuffFixFormatter(CommandLineFormatter):
+    ruff_args = ["check", "-eq", "--fix-only", "-"]
+
     @property
     def label(self) -> str:
-        return f"Apply ruff Formatter"
+        return "Apply ruff fix"
 
     def __init__(self):
         try:
@@ -467,7 +469,15 @@ def __init__(self):
             ruff_command = find_ruff_bin()
         except (ImportError, FileNotFoundError):
             ruff_command = "ruff"
-        self.command = [ruff_command, "check", "--fix-only", "-"]
+        self.command = [ruff_command, *self.ruff_args]
+
+
+class RuffFormatFormatter(RuffFixFormatter):
+    @property
+    def label(self) -> str:
+        return "Apply ruff formatter"
+
+    ruff_args = ["format", "-q", "-"]
 
 
 SERVER_FORMATTERS = {
@@ -477,6 +487,7 @@ def __init__(self):
     "yapf": YapfFormatter(),
     "isort": IsortFormatter(),
     "ruff": RuffFixFormatter(),
+    "ruffformat": RuffFormatFormatter(),
     "formatR": FormatRFormatter(),
     "styler": StylerFormatter(),
     "scalafmt": CommandLineFormatter(command=["scalafmt", "--stdin"]),

jupyterlab_code_formatter/tests/test_handlers.py

@@ -588,11 +588,15 @@ async def test_can_rustfmt(request_format):  # type: ignore[no-untyped-def]
     assert json_result["code"][0]["code"] == expected
 
 
-@pytest.mark.xfail(reason="Rust toolchain isn't respected in test for some reason atm.")
-async def test_can_apply_ruff(request_format):  # type: ignore[no-untyped-def]
-    """Check that it can apply black with simple config."""
+IMPORT_SORTING_EXAMPLE = (
+    "import numpy as np\nimport sys,os\nfrom enum import IntEnum\nfrom enum import auto"
+)
+
+
+async def test_can_apply_ruff_formatter(request_format):  # type: ignore[no-untyped-def]
+    """Check that it can apply ruff with simple config."""
     response: HTTPResponse = await request_format(
-        formatter="ruff",
+        formatter="ruffformat",
         code=[SIMPLE_VALID_PYTHON_CODE],
         options={},
     )
@@ -602,3 +606,47 @@ async def test_can_apply_ruff(request_format):  # type: ignore[no-untyped-def]
         expected_schema=EXPECTED_FROMAT_SCHEMA,
     )
     assert json_result["code"][0]["code"] == "x = 22\ne = 1"
+
+
+async def test_can_apply_ruff_import_fix(request_format):  # type: ignore[no-untyped-def]
+    """Check that it can organize imports with ruff."""
+
+    given = "import foo\nimport numpy as np\nimport sys,os\nfrom enum import IntEnum\nfrom enum import auto"
+    expected = "import os\nimport sys\nfrom enum import IntEnum, auto\n\nimport numpy as np\n\nimport foo"
+    response: HTTPResponse = await request_format(
+        formatter="ruff",
+        code=[given],
+        options={
+            "args": [
+                "--select=I001",
+                "--config",
+                "lint.isort.known-first-party=['foo']",
+            ]
+        },
+    )
+    json_result = _check_http_code_and_schema(
+        response=response,
+        expected_code=200,
+        expected_schema=EXPECTED_FROMAT_SCHEMA,
+    )
+    assert json_result["code"][0]["code"] == expected
+
+
+async def test_can_apply_ruff_fix_unsafe(request_format):  # type: ignore[no-untyped-def]
+    """Check that it can apply unsafe fixes."""
+
+    given = """if arg != None:
+    pass"""
+    expected = """if arg is not None:
+    pass"""
+    response: HTTPResponse = await request_format(
+        formatter="ruff",
+        code=[given],
+        options={"args": ["--select=E711", "--unsafe-fixes"]},
+    )
+    json_result = _check_http_code_and_schema(
+        response=response,
+        expected_code=200,
+        expected_schema=EXPECTED_FROMAT_SCHEMA,
+    )
+    assert json_result["code"][0]["code"] == expected

pyproject.toml

@@ -53,6 +53,7 @@ test = [
     "yapf",
     "rpy2",
     "importlib_metadata; python_version<'3.8'",
+    "ruff",
 ]
 
 [tool.hatch.version]

schema/settings.json

@@ -208,6 +208,13 @@
       "additionalProperties": false,
       "type": "object"
     },
+    "ruffformat": {
+      "properties": {
+        "args": { "type": "array", "items": { "type": "string" } }
+      },
+      "additionalProperties": false,
+      "type": "object"
+    },
     "formatR": {
       "properties": {
         "comment": {
@@ -407,11 +414,19 @@
       }
     },
     "ruff": {
-      "title": "Ruff Config",
-      "description": "Command line options to be passed to ruff.",
+      "title": "Ruff Check Config",
+      "description": "Command line options to be passed to ruff check.  Default is to organise imports.",
       "$ref": "#/definitions/ruff",
       "default": {
-        "args": ["--select=I"]
+        "args": ["--select=I001"]
+      }
+    },
+    "ruffformat": {
+      "title": "Ruff Format Config",
+      "description": "Command line options to be passed to ruff format.",
+      "$ref": "#/definitions/ruffformat",
+      "default": {
+        "args": []
       }
     },
     "suppressFormatterErrors": {