Remove regex dependency (GH-2663)

We were no longer using it since GH-2644 and GH-2654. This should hopefully
make using Black easier to use as there's one less compiled dependency.
The core team also doesn't have to deal with the surprisingly frequent fires
the regex packaging setup goes through.

Co-authored-by: Richard Si <63936253+ichard26@users.noreply.github.com>

diff --git a/CHANGES.md b/CHANGES.md
index c9a4f09a72a8b88b1439223ca9e085d81dc50315..fc198a8f8c0cd120adee3972ce15bf97283e395e 100644 (file)
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -8,7 +8,7 @@
   cell magics were tokenized, leading to possible indentation errors e.g. with
   `%%writefile`. (#2630)
 - Fix Python 3.10 support on platforms without ProcessPoolExecutor (#2631)
-- Reduce usage of the `regex` dependency (#2644)
+- Remove dependency on `regex` (#2644) (#2663)
 - Fix `match` statements with open sequence subjects, like `match a, b:` or
   `match a, *b:` (#2639) (#2659)
 - Fix `match`/`case` statements that contain `match`/`case` soft keywords multiple

diff --git a/Pipfile b/Pipfile
index 9608f4d4ef780ec0107e895c1aa7a36525744c1d..a3af5fd8844641b3fe1fd66a55f14d8a7da750dd 100644 (file)
--- a/Pipfile
+++ b/Pipfile
@@ -42,7 +42,6 @@ platformdirs= ">=2"
 click = ">=8.0.0"
 mypy_extensions = ">=0.4.3"
 pathspec = ">=0.8.1"
-regex = ">=2021.4.4"
 tomli = ">=0.2.6, <2.0.0"
 typed-ast = "==1.4.3"
 typing_extensions = {markers = "python_version < '3.10'", version = ">=3.10.0.0"}

diff --git a/Pipfile.lock b/Pipfile.lock
index a02ea4a2590d7c52e5088bfb188e7a55c8a66bcb..b2a9f6c6fc06a359fcdbacc33078bdfbf1c00f26 100644 (file)
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -1,7 +1,7 @@
 {
     "_meta": {
         "hash": {
-            "sha256": "a516705ed9270469fd58d20f1b26a94a6ed052451ef7425d82605b80513a65b3"
+            "sha256": "7728caac52b47ed119a804ead88afa002d62c17a324e962b7833b8944049609b"
         },
         "pipfile-spec": 6,
         "requires": {},
@@ -375,61 +375,6 @@
             "markers": "python_version >= '2.6' and python_version not in '3.0, 3.1, 3.2, 3.3'",
             "version": "==2.4.7"
         },
-        "regex": {
-            "hashes": [
-                "sha256:05b7d6d7e64efe309972adab77fc2af8907bb93217ec60aa9fe12a0dad35874f",
-                "sha256:0617383e2fe465732af4509e61648b77cbe3aee68b6ac8c0b6fe934db90be5cc",
-                "sha256:07856afef5ffcc052e7eccf3213317fbb94e4a5cd8177a2caa69c980657b3cb4",
-                "sha256:162abfd74e88001d20cb73ceaffbfe601469923e875caf9118333b1a4aaafdc4",
-                "sha256:2207ae4f64ad3af399e2d30dde66f0b36ae5c3129b52885f1bffc2f05ec505c8",
-                "sha256:30ab804ea73972049b7a2a5c62d97687d69b5a60a67adca07eb73a0ddbc9e29f",
-                "sha256:3b5df18db1fccd66de15aa59c41e4f853b5df7550723d26aa6cb7f40e5d9da5a",
-                "sha256:3c5fb32cc6077abad3bbf0323067636d93307c9fa93e072771cf9a64d1c0f3ef",
-                "sha256:416c5f1a188c91e3eb41e9c8787288e707f7d2ebe66e0a6563af280d9b68478f",
-                "sha256:432bd15d40ed835a51617521d60d0125867f7b88acf653e4ed994a1f8e4995dc",
-                "sha256:4aaa4e0705ef2b73dd8e36eeb4c868f80f8393f5f4d855e94025ce7ad8525f50",
-                "sha256:537ca6a3586931b16a85ac38c08cc48f10fc870a5b25e51794c74df843e9966d",
-                "sha256:53db2c6be8a2710b359bfd3d3aa17ba38f8aa72a82309a12ae99d3c0c3dcd74d",
-                "sha256:5537f71b6d646f7f5f340562ec4c77b6e1c915f8baae822ea0b7e46c1f09b733",
-                "sha256:6650f16365f1924d6014d2ea770bde8555b4a39dc9576abb95e3cd1ff0263b36",
-                "sha256:666abff54e474d28ff42756d94544cdfd42e2ee97065857413b72e8a2d6a6345",
-                "sha256:68a067c11463de2a37157930d8b153005085e42bcb7ad9ca562d77ba7d1404e0",
-                "sha256:780b48456a0f0ba4d390e8b5f7c661fdd218934388cde1a974010a965e200e12",
-                "sha256:788aef3549f1924d5c38263104dae7395bf020a42776d5ec5ea2b0d3d85d6646",
-                "sha256:7ee1227cf08b6716c85504aebc49ac827eb88fcc6e51564f010f11a406c0a667",
-                "sha256:7f301b11b9d214f83ddaf689181051e7f48905568b0c7017c04c06dfd065e244",
-                "sha256:83ee89483672b11f8952b158640d0c0ff02dc43d9cb1b70c1564b49abe92ce29",
-                "sha256:85bfa6a5413be0ee6c5c4a663668a2cad2cbecdee367630d097d7823041bdeec",
-                "sha256:9345b6f7ee578bad8e475129ed40123d265464c4cfead6c261fd60fc9de00bcf",
-                "sha256:93a5051fcf5fad72de73b96f07d30bc29665697fb8ecdfbc474f3452c78adcf4",
-                "sha256:962b9a917dd7ceacbe5cd424556914cb0d636001e393b43dc886ba31d2a1e449",
-                "sha256:98ba568e8ae26beb726aeea2273053c717641933836568c2a0278a84987b2a1a",
-                "sha256:a3feefd5e95871872673b08636f96b61ebef62971eab044f5124fb4dea39919d",
-                "sha256:b43c2b8a330a490daaef5a47ab114935002b13b3f9dc5da56d5322ff218eeadb",
-                "sha256:b483c9d00a565633c87abd0aaf27eb5016de23fed952e054ecc19ce32f6a9e7e",
-                "sha256:ba05430e819e58544e840a68b03b28b6d328aff2e41579037e8bab7653b37d83",
-                "sha256:ca5f18a75e1256ce07494e245cdb146f5a9267d3c702ebf9b65c7f8bd843431e",
-                "sha256:d5ca078bb666c4a9d1287a379fe617a6dccd18c3e8a7e6c7e1eb8974330c626a",
-                "sha256:da1a90c1ddb7531b1d5ff1e171b4ee61f6345119be7351104b67ff413843fe94",
-                "sha256:dba70f30fd81f8ce6d32ddeef37d91c8948e5d5a4c63242d16a2b2df8143aafc",
-                "sha256:dd33eb9bdcfbabab3459c9ee651d94c842bc8a05fabc95edf4ee0c15a072495e",
-                "sha256:e0538c43565ee6e703d3a7c3bdfe4037a5209250e8502c98f20fea6f5fdf2965",
-                "sha256:e1f54b9b4b6c53369f40028d2dd07a8c374583417ee6ec0ea304e710a20f80a0",
-                "sha256:e32d2a2b02ccbef10145df9135751abea1f9f076e67a4e261b05f24b94219e36",
-                "sha256:e71255ba42567d34a13c03968736c5d39bb4a97ce98188fafb27ce981115beec",
-                "sha256:ed2e07c6a26ed4bea91b897ee2b0835c21716d9a469a96c3e878dc5f8c55bb23",
-                "sha256:eef2afb0fd1747f33f1ee3e209bce1ed582d1896b240ccc5e2697e3275f037c7",
-                "sha256:f23222527b307970e383433daec128d769ff778d9b29343fb3496472dc20dabe",
-                "sha256:f341ee2df0999bfdf7a95e448075effe0db212a59387de1a70690e4acb03d4c6",
-                "sha256:f7f325be2804246a75a4f45c72d4ce80d2443ab815063cdf70ee8fb2ca59ee1b",
-                "sha256:f8af619e3be812a2059b212064ea7a640aff0568d972cd1b9e920837469eb3cb",
-                "sha256:fa8c626d6441e2d04b6ee703ef2d1e17608ad44c7cb75258c09dd42bacdfc64b",
-                "sha256:fbb9dc00e39f3e6c0ef48edee202f9520dafb233e8b51b06b8428cfcb92abd30",
-                "sha256:fff55f3ce50a3ff63ec8e2a8d3dd924f1941b250b0aac3d3d42b687eeff07a8e"
-            ],
-            "index": "pypi",
-            "version": "==2021.11.10"
-        },
         "setuptools": {
             "hashes": [
                 "sha256:a481fbc56b33f5d8f6b33dce41482e64c68b668be44ff42922903b03872590bf",
@@ -1624,61 +1569,6 @@
             "index": "pypi",
             "version": "==30.0"
         },
-        "regex": {
-            "hashes": [
-                "sha256:05b7d6d7e64efe309972adab77fc2af8907bb93217ec60aa9fe12a0dad35874f",
-                "sha256:0617383e2fe465732af4509e61648b77cbe3aee68b6ac8c0b6fe934db90be5cc",
-                "sha256:07856afef5ffcc052e7eccf3213317fbb94e4a5cd8177a2caa69c980657b3cb4",
-                "sha256:162abfd74e88001d20cb73ceaffbfe601469923e875caf9118333b1a4aaafdc4",
-                "sha256:2207ae4f64ad3af399e2d30dde66f0b36ae5c3129b52885f1bffc2f05ec505c8",
-                "sha256:30ab804ea73972049b7a2a5c62d97687d69b5a60a67adca07eb73a0ddbc9e29f",
-                "sha256:3b5df18db1fccd66de15aa59c41e4f853b5df7550723d26aa6cb7f40e5d9da5a",
-                "sha256:3c5fb32cc6077abad3bbf0323067636d93307c9fa93e072771cf9a64d1c0f3ef",
-                "sha256:416c5f1a188c91e3eb41e9c8787288e707f7d2ebe66e0a6563af280d9b68478f",
-                "sha256:432bd15d40ed835a51617521d60d0125867f7b88acf653e4ed994a1f8e4995dc",
-                "sha256:4aaa4e0705ef2b73dd8e36eeb4c868f80f8393f5f4d855e94025ce7ad8525f50",
-                "sha256:537ca6a3586931b16a85ac38c08cc48f10fc870a5b25e51794c74df843e9966d",
-                "sha256:53db2c6be8a2710b359bfd3d3aa17ba38f8aa72a82309a12ae99d3c0c3dcd74d",
-                "sha256:5537f71b6d646f7f5f340562ec4c77b6e1c915f8baae822ea0b7e46c1f09b733",
-                "sha256:6650f16365f1924d6014d2ea770bde8555b4a39dc9576abb95e3cd1ff0263b36",
-                "sha256:666abff54e474d28ff42756d94544cdfd42e2ee97065857413b72e8a2d6a6345",
-                "sha256:68a067c11463de2a37157930d8b153005085e42bcb7ad9ca562d77ba7d1404e0",
-                "sha256:780b48456a0f0ba4d390e8b5f7c661fdd218934388cde1a974010a965e200e12",
-                "sha256:788aef3549f1924d5c38263104dae7395bf020a42776d5ec5ea2b0d3d85d6646",
-                "sha256:7ee1227cf08b6716c85504aebc49ac827eb88fcc6e51564f010f11a406c0a667",
-                "sha256:7f301b11b9d214f83ddaf689181051e7f48905568b0c7017c04c06dfd065e244",
-                "sha256:83ee89483672b11f8952b158640d0c0ff02dc43d9cb1b70c1564b49abe92ce29",
-                "sha256:85bfa6a5413be0ee6c5c4a663668a2cad2cbecdee367630d097d7823041bdeec",
-                "sha256:9345b6f7ee578bad8e475129ed40123d265464c4cfead6c261fd60fc9de00bcf",
-                "sha256:93a5051fcf5fad72de73b96f07d30bc29665697fb8ecdfbc474f3452c78adcf4",
-                "sha256:962b9a917dd7ceacbe5cd424556914cb0d636001e393b43dc886ba31d2a1e449",
-                "sha256:98ba568e8ae26beb726aeea2273053c717641933836568c2a0278a84987b2a1a",
-                "sha256:a3feefd5e95871872673b08636f96b61ebef62971eab044f5124fb4dea39919d",
-                "sha256:b43c2b8a330a490daaef5a47ab114935002b13b3f9dc5da56d5322ff218eeadb",
-                "sha256:b483c9d00a565633c87abd0aaf27eb5016de23fed952e054ecc19ce32f6a9e7e",
-                "sha256:ba05430e819e58544e840a68b03b28b6d328aff2e41579037e8bab7653b37d83",
-                "sha256:ca5f18a75e1256ce07494e245cdb146f5a9267d3c702ebf9b65c7f8bd843431e",
-                "sha256:d5ca078bb666c4a9d1287a379fe617a6dccd18c3e8a7e6c7e1eb8974330c626a",
-                "sha256:da1a90c1ddb7531b1d5ff1e171b4ee61f6345119be7351104b67ff413843fe94",
-                "sha256:dba70f30fd81f8ce6d32ddeef37d91c8948e5d5a4c63242d16a2b2df8143aafc",
-                "sha256:dd33eb9bdcfbabab3459c9ee651d94c842bc8a05fabc95edf4ee0c15a072495e",
-                "sha256:e0538c43565ee6e703d3a7c3bdfe4037a5209250e8502c98f20fea6f5fdf2965",
-                "sha256:e1f54b9b4b6c53369f40028d2dd07a8c374583417ee6ec0ea304e710a20f80a0",
-                "sha256:e32d2a2b02ccbef10145df9135751abea1f9f076e67a4e261b05f24b94219e36",
-                "sha256:e71255ba42567d34a13c03968736c5d39bb4a97ce98188fafb27ce981115beec",
-                "sha256:ed2e07c6a26ed4bea91b897ee2b0835c21716d9a469a96c3e878dc5f8c55bb23",
-                "sha256:eef2afb0fd1747f33f1ee3e209bce1ed582d1896b240ccc5e2697e3275f037c7",
-                "sha256:f23222527b307970e383433daec128d769ff778d9b29343fb3496472dc20dabe",
-                "sha256:f341ee2df0999bfdf7a95e448075effe0db212a59387de1a70690e4acb03d4c6",
-                "sha256:f7f325be2804246a75a4f45c72d4ce80d2443ab815063cdf70ee8fb2ca59ee1b",
-                "sha256:f8af619e3be812a2059b212064ea7a640aff0568d972cd1b9e920837469eb3cb",
-                "sha256:fa8c626d6441e2d04b6ee703ef2d1e17608ad44c7cb75258c09dd42bacdfc64b",
-                "sha256:fbb9dc00e39f3e6c0ef48edee202f9520dafb233e8b51b06b8428cfcb92abd30",
-                "sha256:fff55f3ce50a3ff63ec8e2a8d3dd924f1941b250b0aac3d3d42b687eeff07a8e"
-            ],
-            "index": "pypi",
-            "version": "==2021.11.10"
-        },
         "requests": {
             "hashes": [
                 "sha256:6c1246513ecd5ecd4528a0906f910e8f0f9c6b8ec72030dc9fd154dc1a6efd24",

diff --git a/docs/integrations/editors.md b/docs/integrations/editors.md
index d3be7c0ea84ddd482fdb01efb7846fb370a80057..9c279564fa3743c2aabe9a238523856788cf7435 100644 (file)
--- a/docs/integrations/editors.md
+++ b/docs/integrations/editors.md
@@ -204,30 +204,28 @@ Traceback (most recent call last):
 ImportError: /home/gui/.vim/black/lib/python3.7/site-packages/typed_ast/_ast3.cpython-37m-x86_64-linux-gnu.so: undefined symbool: PyExc_KeyboardInterrupt
 ```
 
-Then you need to install `typed_ast` and `regex` directly from the source code. The
-error happens because `pip` will download [Python wheels](https://pythonwheels.com/) if
-they are available. Python wheels are a new standard of distributing Python packages and
-packages that have Cython and extensions written in C are already compiled, so the
-installation is much more faster. The problem here is that somehow the Python
-environment inside Vim does not match with those already compiled C extensions and these
-kind of errors are the result. Luckily there is an easy fix: installing the packages
-from the source code.
-
-The two packages that cause the problem are:
-
-- [regex](https://pypi.org/project/regex/)
+Then you need to install `typed_ast` directly from the source code. The error happens
+because `pip` will download [Python wheels](https://pythonwheels.com/) if they are
+available. Python wheels are a new standard of distributing Python packages and packages
+that have Cython and extensions written in C are already compiled, so the installation
+is much more faster. The problem here is that somehow the Python environment inside Vim
+does not match with those already compiled C extensions and these kind of errors are the
+result. Luckily there is an easy fix: installing the packages from the source code.
+
+The package that causes problems is:
+
 - [typed-ast](https://pypi.org/project/typed-ast/)
 
 Now remove those two packages:
 
 ```console
-$ pip uninstall regex typed-ast -y
+$ pip uninstall typed-ast -y
 ```
 
 And now you can install them with:
 
 ```console
-$ pip install --no-binary :all: regex typed-ast
+$ pip install --no-binary :all: typed-ast
 ```
 
 The C extensions will be compiled and now Vim's Python environment will match. Note that
@@ -237,7 +235,7 @@ Ubuntu/Debian do `sudo apt-get install build-essential python3-dev`).
 If you later want to update _Black_, you should do it like this:
 
 ```console
-$ pip install -U black --no-binary regex,typed-ast
+$ pip install -U black --no-binary typed-ast
 ```
 
 ### With ALE

diff --git a/setup.py b/setup.py
index 33b7239a13e9b55a0b2220bf981ef63a98c08728..a21bc87264ddce52b795b7e972a47e11380a413a 100644 (file)
--- a/setup.py
+++ b/setup.py
@@ -101,7 +101,6 @@ setup(
         "platformdirs>=2",
         "tomli>=0.2.6,<2.0.0",
         "typed-ast>=1.4.2; python_version < '3.8' and implementation_name == 'cpython'",
-        "regex>=2021.4.4",
         "pathspec>=0.9.0, <1",
         "dataclasses>=0.6; python_version < '3.7'",
         "typing_extensions>=3.10.0.0",

diff --git a/src/black/trans.py b/src/black/trans.py
index 6aca3a8733f1f2f74624e6ad7aaba3e9e70313c6..cb41c1be487bdc1788e42340e408cd80d9d58d09 100644 (file)
--- a/src/black/trans.py
+++ b/src/black/trans.py
@@ -4,7 +4,7 @@ String transformers that can split and merge strings.
 from abc import ABC, abstractmethod
 from collections import defaultdict
 from dataclasses import dataclass
-import regex as re  # We need recursive patterns here (?R)
+import re
 from typing import (
     Any,
     Callable,
@@ -453,7 +453,7 @@ class StringMerger(StringTransformer, CustomSplitMapMixin):
             # with 'f'...
             if "f" in prefix and "f" not in next_prefix:
                 # Then we must escape any braces contained in this substring.
-                SS = re.subf(r"(\{|\})", "{1}{1}", SS)
+                SS = re.sub(r"(\{|\})", r"\1\1", SS)
 
             NSS = make_naked(SS, next_prefix)