_Black_ is able to read project-specific default values for its command line options
from a `pyproject.toml` file. This is especially useful for specifying custom
-`--include` and `--exclude` patterns for your project.
+`--include` and `--exclude`/`--force-exclude`/`--extend-exclude` patterns for your
+project.
**Pro-tip**: If you're asking yourself "Do I need to configure anything?" the answer is
"No". _Black_ is all about sensible defaults.
If you're formatting standard input, _Black_ will look for configuration starting from
the current working directory.
+You can use a "global" configuration, stored in a specific location in your home
+directory. This will be used as a fallback configuration, that is, it will be used if
+and only if _Black_ doesn't find any configuration as mentioned above. Depending on your
+operating system, this configuration file should be stored as:
+
+- Windows: `~\.black`
+- Unix-like (Linux, MacOS, etc.): `$XDG_CONFIG_HOME/black` (`~/.config/black` if the
+ `XDG_CONFIG_HOME` environment variable is not set)
+
+Note that these are paths to the TOML file itself (meaning that they shouldn't be named
+as `pyproject.toml`), not directories where you store the configuration. Here, `~`
+refers to the path to your home directory. On Windows, this will be something like
+`C:\\Users\UserName`.
+
You can also explicitly specify the path to a particular file that you want with
`--config`. In this situation _Black_ will not look for any other file.
line-length = 88
target-version = ['py37']
include = '\.pyi?$'
-exclude = '''
+extend-exclude = '''
# A regex preceded with ^/ will apply only to files and directories
# in the root of the project.
-^/(
- (
- \.eggs # exclude a few common directories in the
- | \.git # root of the project
- | \.hg
- | \.mypy_cache
- | \.tox
- | \.venv
- | _build
- | buck-out
- | build
- | dist
- )/
- | foo.py # also separately exclude a file named foo.py in
- # the root of the project
-)
+^/foo.py # exclude a file named foo.py in the root of the project (in addition to the defaults)
'''
```