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e87a1e4edfa09783f70842e47aa2bd1a30a4188f
[etc/vim.git] / autoload / black.vim
1 python3 << EndPython3
2 import collections
3 import os
4 import sys
5 import vim
6
7 def strtobool(text):
8   if text.lower() in ['y', 'yes', 't', 'true', 'on', '1']:
9     return True
10   if text.lower() in ['n', 'no', 'f', 'false', 'off', '0']:
11     return False
12   raise ValueError(f"{text} is not convertable to boolean")
13
14 class Flag(collections.namedtuple("FlagBase", "name, cast")):
15   @property
16   def var_name(self):
17     return self.name.replace("-", "_")
18
19   @property
20   def vim_rc_name(self):
21     name = self.var_name
22     if name == "line_length":
23       name = name.replace("_", "")
24     return "g:black_" + name
25
26
27 FLAGS = [
28   Flag(name="line_length", cast=int),
29   Flag(name="fast", cast=strtobool),
30   Flag(name="skip_string_normalization", cast=strtobool),
31   Flag(name="quiet", cast=strtobool),
32   Flag(name="skip_magic_trailing_comma", cast=strtobool),
33   Flag(name="preview", cast=strtobool),
34 ]
35
36
37 def _get_python_binary(exec_prefix):
38   try:
39     default = vim.eval("g:pymode_python").strip()
40   except vim.error:
41     default = ""
42   if default and os.path.exists(default):
43     return default
44   if sys.platform[:3] == "win":
45     return exec_prefix / 'python.exe'
46   return exec_prefix / 'bin' / 'python3'
47
48 def _get_pip(venv_path):
49   if sys.platform[:3] == "win":
50     return venv_path / 'Scripts' / 'pip.exe'
51   return venv_path / 'bin' / 'pip'
52
53 def _get_virtualenv_site_packages(venv_path, pyver):
54   if sys.platform[:3] == "win":
55     return venv_path / 'Lib' / 'site-packages'
56   return venv_path / 'lib' / f'python{pyver[0]}.{pyver[1]}' / 'site-packages'
57
58 def _initialize_black_env(upgrade=False):
59   pyver = sys.version_info[:3]
60   if pyver < (3, 6, 2):
61     print("Sorry, Black requires Python 3.6.2+ to run.")
62     return False
63
64   from pathlib import Path
65   import subprocess
66   import venv
67   virtualenv_path = Path(vim.eval("g:black_virtualenv")).expanduser()
68   virtualenv_site_packages = str(_get_virtualenv_site_packages(virtualenv_path, pyver))
69   first_install = False
70   if not virtualenv_path.is_dir():
71     print('Please wait, one time setup for Black.')
72     _executable = sys.executable
73     _base_executable = getattr(sys, "_base_executable", _executable)
74     try:
75       executable = str(_get_python_binary(Path(sys.exec_prefix)))
76       sys.executable = executable
77       sys._base_executable = executable
78       print(f'Creating a virtualenv in {virtualenv_path}...')
79       print('(this path can be customized in .vimrc by setting g:black_virtualenv)')
80       venv.create(virtualenv_path, with_pip=True)
81     except Exception:
82       print('Encountered exception while creating virtualenv (see traceback below).')
83       print(f'Removing {virtualenv_path}...')
84       import shutil
85       shutil.rmtree(virtualenv_path)
86       raise
87     finally:
88       sys.executable = _executable
89       sys._base_executable = _base_executable
90     first_install = True
91   if first_install:
92     print('Installing Black with pip...')
93   if upgrade:
94     print('Upgrading Black with pip...')
95   if first_install or upgrade:
96     subprocess.run([str(_get_pip(virtualenv_path)), 'install', '-U', 'black'], stdout=subprocess.PIPE)
97     print('DONE! You are all set, thanks for waiting ✨ 🍰 ✨')
98   if first_install:
99     print('Pro-tip: to upgrade Black in the future, use the :BlackUpgrade command and restart Vim.\n')
100   if virtualenv_site_packages not in sys.path:
101     sys.path.insert(0, virtualenv_site_packages)
102   return True
103
104 if _initialize_black_env():
105   import black
106   import time
107
108 def get_target_version(tv):
109   if isinstance(tv, black.TargetVersion):
110     return tv
111   ret = None
112   try:
113     ret = black.TargetVersion[tv.upper()]
114   except KeyError:
115     print(f"WARNING: Target version {tv!r} not recognized by Black, using default target")
116   return ret
117
118 def Black(**kwargs):
119   """
120   kwargs allows you to override ``target_versions`` argument of
121   ``black.FileMode``.
122
123   ``target_version`` needs to be cleaned because ``black.FileMode``
124   expects the ``target_versions`` argument to be a set of TargetVersion enums.
125
126   Allow kwargs["target_version"] to be a string to allow
127   to type it more quickly.
128
129   Using also target_version instead of target_versions to remain
130   consistent to Black's documentation of the structure of pyproject.toml.
131   """
132   start = time.time()
133   configs = get_configs()
134
135   black_kwargs = {}
136   if "target_version" in kwargs:
137     target_version = kwargs["target_version"]
138
139     if not isinstance(target_version, (list, set)):
140       target_version = [target_version]
141     target_version = set(filter(lambda x: x, map(lambda tv: get_target_version(tv), target_version)))
142     black_kwargs["target_versions"] = target_version
143
144   mode = black.FileMode(
145     line_length=configs["line_length"],
146     string_normalization=not configs["skip_string_normalization"],
147     is_pyi=vim.current.buffer.name.endswith('.pyi'),
148     magic_trailing_comma=not configs["skip_magic_trailing_comma"],
149     preview=configs["preview"],
150     **black_kwargs,
151   )
152   quiet = configs["quiet"]
153
154   buffer_str = '\n'.join(vim.current.buffer) + '\n'
155   try:
156     new_buffer_str = black.format_file_contents(
157       buffer_str,
158       fast=configs["fast"],
159       mode=mode,
160     )
161   except black.NothingChanged:
162     if not quiet:
163       print(f'Black: already well formatted, good job. (took {time.time() - start:.4f}s)')
164   except Exception as exc:
165     print(f'Black: {exc}')
166   else:
167     current_buffer = vim.current.window.buffer
168     cursors = []
169     for i, tabpage in enumerate(vim.tabpages):
170       if tabpage.valid:
171         for j, window in enumerate(tabpage.windows):
172           if window.valid and window.buffer == current_buffer:
173             cursors.append((i, j, window.cursor))
174     vim.current.buffer[:] = new_buffer_str.split('\n')[:-1]
175     for i, j, cursor in cursors:
176       window = vim.tabpages[i].windows[j]
177       try:
178         window.cursor = cursor
179       except vim.error:
180         window.cursor = (len(window.buffer), 0)
181     if not quiet:
182       print(f'Black: reformatted in {time.time() - start:.4f}s.')
183
184 def get_configs():
185   filename = vim.eval("@%")
186   path_pyproject_toml = black.find_pyproject_toml((filename,))
187   if path_pyproject_toml:
188     toml_config = black.parse_pyproject_toml(path_pyproject_toml)
189   else:
190     toml_config = {}
191
192   return {
193     flag.var_name: toml_config.get(flag.name, flag.cast(vim.eval(flag.vim_rc_name)))
194     for flag in FLAGS
195   }
196
197
198 def BlackUpgrade():
199   _initialize_black_env(upgrade=True)
200
201 def BlackVersion():
202   print(f'Black, version {black.__version__} on Python {sys.version}.')
203
204 EndPython3
205
206 function black#Black(...)
207     let kwargs = {}
208     for arg in a:000
209         let arg_list = split(arg, '=')
210         let kwargs[arg_list[0]] = arg_list[1]
211     endfor
212 python3 << EOF
213 import vim
214 kwargs = vim.eval("kwargs")
215 EOF
216   :py3 Black(**kwargs)
217 endfunction
218
219 function black#BlackUpgrade()
220   :py3 BlackUpgrade()
221 endfunction
222
223 function black#BlackVersion()
224   :py3 BlackVersion()
225 endfunction