]> git.madduck.net Git - etc/vim.git/blobdiff - blackd.py

madduck's git repository

Every one of the projects in this repository is available at the canonical URL git://git.madduck.net/madduck/pub/<projectpath> — see each project's metadata for the exact URL.

All patches and comments are welcome. Please squash your changes to logical commits before using git-format-patch and git-send-email to patches@git.madduck.net. If you'd read over the Git project's submission guidelines and adhered to them, I'd be especially grateful.

SSH access, as well as push access can be individually arranged.

If you use my repositories frequently, consider adding the following snippet to ~/.gitconfig and using the third clone URL listed for each project:

[url "git://git.madduck.net/madduck/"]
  insteadOf = madduck:

fix environment for readthedocs
[etc/vim.git] / blackd.py
index 1a3b3690bc3b38b41b034eadf41cb271c203d185..37fcec31ec10b092a8a273dc03a5d59921d3464c 100644 (file)
--- a/blackd.py
+++ b/blackd.py
@@ -3,6 +3,7 @@ from concurrent.futures import Executor, ProcessPoolExecutor
 from functools import partial
 import logging
 from multiprocessing import freeze_support
+from typing import Set, Tuple
 
 from aiohttp import web
 import aiohttp_cors
@@ -16,7 +17,6 @@ VERSION_HEADER = "X-Protocol-Version"
 LINE_LENGTH_HEADER = "X-Line-Length"
 PYTHON_VARIANT_HEADER = "X-Python-Variant"
 SKIP_STRING_NORMALIZATION_HEADER = "X-Skip-String-Normalization"
-SKIP_NUMERIC_UNDERSCORE_NORMALIZATION_HEADER = "X-Skip-Numeric-Underscore-Normalization"
 FAST_OR_SAFE_HEADER = "X-Fast-Or-Safe"
 
 BLACK_HEADERS = [
@@ -24,11 +24,14 @@ BLACK_HEADERS = [
     LINE_LENGTH_HEADER,
     PYTHON_VARIANT_HEADER,
     SKIP_STRING_NORMALIZATION_HEADER,
-    SKIP_NUMERIC_UNDERSCORE_NORMALIZATION_HEADER,
     FAST_OR_SAFE_HEADER,
 ]
 
 
+class InvalidVariantHeader(Exception):
+    pass
+
+
 @click.command(context_settings={"help_option_names": ["-h", "--help"]})
 @click.option(
     "--bind-host", type=str, help="Address to bind the server to.", default="localhost"
@@ -73,50 +76,38 @@ async def handle(request: web.Request, executor: Executor) -> web.Response:
             )
         except ValueError:
             return web.Response(status=400, text="Invalid line length header value")
-        py36 = False
-        pyi = False
+
         if PYTHON_VARIANT_HEADER in request.headers:
             value = request.headers[PYTHON_VARIANT_HEADER]
-            if value == "pyi":
-                pyi = True
-            else:
-                try:
-                    major, *rest = value.split(".")
-                    if int(major) == 3 and len(rest) > 0:
-                        if int(rest[0]) >= 6:
-                            py36 = True
-                except ValueError:
-                    return web.Response(
-                        status=400, text=f"Invalid value for {PYTHON_VARIANT_HEADER}"
-                    )
+            try:
+                pyi, versions = parse_python_variant_header(value)
+            except InvalidVariantHeader as e:
+                return web.Response(
+                    status=400,
+                    text=f"Invalid value for {PYTHON_VARIANT_HEADER}: {e.args[0]}",
+                )
+        else:
+            pyi = False
+            versions = set()
+
         skip_string_normalization = bool(
             request.headers.get(SKIP_STRING_NORMALIZATION_HEADER, False)
         )
-        skip_numeric_underscore_normalization = bool(
-            request.headers.get(SKIP_NUMERIC_UNDERSCORE_NORMALIZATION_HEADER, False)
-        )
         fast = False
         if request.headers.get(FAST_OR_SAFE_HEADER, "safe") == "fast":
             fast = True
-        mode = black.FileMode.from_configuration(
-            py36=py36,
-            pyi=pyi,
-            skip_string_normalization=skip_string_normalization,
-            skip_numeric_underscore_normalization=skip_numeric_underscore_normalization,
+        mode = black.FileMode(
+            target_versions=versions,
+            is_pyi=pyi,
+            line_length=line_length,
+            string_normalization=not skip_string_normalization,
         )
         req_bytes = await request.content.read()
         charset = request.charset if request.charset is not None else "utf8"
         req_str = req_bytes.decode(charset)
         loop = asyncio.get_event_loop()
         formatted_str = await loop.run_in_executor(
-            executor,
-            partial(
-                black.format_file_contents,
-                req_str,
-                line_length=line_length,
-                fast=fast,
-                mode=mode,
-            ),
+            executor, partial(black.format_file_contents, req_str, fast=fast, mode=mode)
         )
         return web.Response(
             content_type=request.content_type, charset=charset, text=formatted_str
@@ -130,6 +121,41 @@ async def handle(request: web.Request, executor: Executor) -> web.Response:
         return web.Response(status=500, text=str(e))
 
 
+def parse_python_variant_header(value: str) -> Tuple[bool, Set[black.TargetVersion]]:
+    if value == "pyi":
+        return True, set()
+    else:
+        versions = set()
+        for version in value.split(","):
+            if version.startswith("py"):
+                version = version[len("py") :]
+            if "." in version:
+                major_str, *rest = version.split(".")
+            else:
+                major_str = version[0]
+                rest = [version[1:]] if len(version) > 1 else []
+            try:
+                major = int(major_str)
+                if major not in (2, 3):
+                    raise InvalidVariantHeader("major version must be 2 or 3")
+                if len(rest) > 0:
+                    minor = int(rest[0])
+                    if major == 2 and minor != 7:
+                        raise InvalidVariantHeader(
+                            "minor version must be 7 for Python 2"
+                        )
+                else:
+                    # Default to lowest supported minor version.
+                    minor = 7 if major == 2 else 3
+                version_str = f"PY{major}{minor}"
+                if major == 3 and not hasattr(black.TargetVersion, version_str):
+                    raise InvalidVariantHeader(f"3.{minor} is not supported")
+                versions.add(black.TargetVersion[version_str])
+            except (KeyError, ValueError):
+                raise InvalidVariantHeader("expected e.g. '3.7', 'py3.5'")
+        return False, versions
+
+
 def patched_main() -> None:
     freeze_support()
     black.patch_click()