]> 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:

Fixing the documentation of how to install the vim plugin (#1318)
[etc/vim.git] / blackd.py
index bfc410d69bfaea382d41ca5d1545b3dc05fe5743..d79bfe75bc2f8c7b419668e8cf10f28e432362c9 100644 (file)
--- a/blackd.py
+++ b/blackd.py
@@ -1,5 +1,6 @@
 import asyncio
 from concurrent.futures import Executor, ProcessPoolExecutor
+from datetime import datetime
 from functools import partial
 import logging
 from multiprocessing import freeze_support
@@ -10,23 +11,31 @@ import aiohttp_cors
 import black
 import click
 
+from _black_version import version as __version__
+
 # This is used internally by tests to shut down the server prematurely
 _stop_signal = asyncio.Event()
 
-VERSION_HEADER = "X-Protocol-Version"
+# Request headers
+PROTOCOL_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"
 FAST_OR_SAFE_HEADER = "X-Fast-Or-Safe"
+DIFF_HEADER = "X-Diff"
 
 BLACK_HEADERS = [
-    VERSION_HEADER,
+    PROTOCOL_VERSION_HEADER,
     LINE_LENGTH_HEADER,
     PYTHON_VARIANT_HEADER,
     SKIP_STRING_NORMALIZATION_HEADER,
     FAST_OR_SAFE_HEADER,
+    DIFF_HEADER,
 ]
 
+# Response headers
+BLACK_VERSION_HEADER = "X-Black-Version"
+
 
 class InvalidVariantHeader(Exception):
     pass
@@ -65,8 +74,9 @@ def make_app() -> web.Application:
 
 
 async def handle(request: web.Request, executor: Executor) -> web.Response:
+    headers = {BLACK_VERSION_HEADER: __version__}
     try:
-        if request.headers.get(VERSION_HEADER, "1") != "1":
+        if request.headers.get(PROTOCOL_VERSION_HEADER, "1") != "1":
             return web.Response(
                 status=501, text="This server only supports protocol version 1"
             )
@@ -105,20 +115,38 @@ async def handle(request: web.Request, executor: Executor) -> web.Response:
         req_bytes = await request.content.read()
         charset = request.charset if request.charset is not None else "utf8"
         req_str = req_bytes.decode(charset)
+        then = datetime.utcnow()
+
         loop = asyncio.get_event_loop()
         formatted_str = await loop.run_in_executor(
             executor, partial(black.format_file_contents, req_str, fast=fast, mode=mode)
         )
+
+        # Only output the diff in the HTTP response
+        only_diff = bool(request.headers.get(DIFF_HEADER, False))
+        if only_diff:
+            now = datetime.utcnow()
+            src_name = f"In\t{then} +0000"
+            dst_name = f"Out\t{now} +0000"
+            loop = asyncio.get_event_loop()
+            formatted_str = await loop.run_in_executor(
+                executor,
+                partial(black.diff, req_str, formatted_str, src_name, dst_name),
+            )
+
         return web.Response(
-            content_type=request.content_type, charset=charset, text=formatted_str
+            content_type=request.content_type,
+            charset=charset,
+            headers=headers,
+            text=formatted_str,
         )
     except black.NothingChanged:
-        return web.Response(status=204)
+        return web.Response(status=204, headers=headers)
     except black.InvalidInput as e:
-        return web.Response(status=400, text=str(e))
+        return web.Response(status=400, headers=headers, text=str(e))
     except Exception as e:
         logging.exception("Exception during handling a request")
-        return web.Response(status=500, text=str(e))
+        return web.Response(status=500, headers=headers, text=str(e))
 
 
 def parse_python_variant_header(value: str) -> Tuple[bool, Set[black.TargetVersion]]:
@@ -127,13 +155,13 @@ def parse_python_variant_header(value: str) -> Tuple[bool, Set[black.TargetVersi
     else:
         versions = set()
         for version in value.split(","):
-            tag = "cpy"
-            if version.startswith("cpy"):
-                version = version[len("cpy") :]
-            elif version.startswith("pypy"):
-                tag = "pypy"
-                version = version[len("pypy") :]
-            major_str, *rest = version.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):
@@ -147,16 +175,12 @@ def parse_python_variant_header(value: str) -> Tuple[bool, Set[black.TargetVersi
                 else:
                     # Default to lowest supported minor version.
                     minor = 7 if major == 2 else 3
-                version_str = f"{tag.upper()}{major}{minor}"
-                # If PyPY is the same as CPython in some version, use
-                # the corresponding CPython version.
-                if tag == "pypy" and not hasattr(black.TargetVersion, version_str):
-                    version_str = f"CPY{major}{minor}"
+                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', 'pypy3.5'")
+                raise InvalidVariantHeader("expected e.g. '3.7', 'py3.5'")
         return False, versions