X-Git-Url: https://git.madduck.net/etc/vim.git/blobdiff_plain/b7e216f55445f5378798aa9f0adf17c985183f43..5bc62a4a82a4e59ad3bb8e9078b9992396ebfd2f:/README.md?ds=inline diff --git a/README.md b/README.md index 4ed3df8..089a67c 100644 --- a/README.md +++ b/README.md @@ -6,7 +6,8 @@ Documentation Status Coverage Status License: MIT -PyPI +PyPI +Downloads Code style: black

@@ -34,6 +35,7 @@ Try it out now using the [Black Playground](https://black.now.sh). **[Code style](#the-black-code-style)** | **[pyproject.toml](#pyprojecttoml)** | **[Editor integration](#editor-integration)** | +**[blackd](#blackd)** | **[Version control integration](#version-control-integration)** | **[Ignoring unmodified files](#ignoring-unmodified-files)** | **[Testimonials](#testimonials)** | @@ -79,6 +81,8 @@ Options: source on standard input). -S, --skip-string-normalization Don't normalize string quotes or prefixes. + -N, --skip-numeric-underscore-normalization + Don't normalize underscores in numeric literals. --check Don't write the files back, just return the status. Return code 0 means nothing would change. Return code 1 means some files would be @@ -97,7 +101,7 @@ Options: recursive searches. On Windows, use forward slashes for directories. [default: build/|buck-out/|dist/|_build/|\.git/|\.hg/| - \.mypy_cache/|\.tox/|\.venv/] + \.mypy_cache/|\.nox/|\.tox/|\.venv/] -q, --quiet Don't emit non-error messages to stderr. Errors are still emitted, silence those with 2>/dev/null. @@ -139,7 +143,8 @@ original. This slows it down. If you're feeling confident, use *Black* reformats entire files in place. It is not configurable. It doesn't take previous formatting into account. It doesn't reformat -blocks that start with `# fmt: off` and end with `# fmt: on`. It also +blocks that start with `# fmt: off` and end with `# fmt: on`. `# fmt: on/off` +have to be on the same level of indentation. It also recognizes [YAPF](https://github.com/google/yapf)'s block comments to the same effect, as a courtesy for straddling code. @@ -233,13 +238,13 @@ the following configuration. multi_line_output=3 include_trailing_comma=True force_grid_wrap=0 -combine_as_imports=True +use_parentheses=True line_length=88 ``` The equivalent command line is: ``` -$ isort --multi-line=3 --trailing-comma --force-grid-wrap=0 --combine-as --line-width=88 [ file.py ] +$ isort --multi-line=3 --trailing-comma --force-grid-wrap=0 --use-parentheses --line-width=88 [ file.py ] ``` @@ -275,7 +280,8 @@ ignore = E501 ``` You'll find *Black*'s own .flake8 config file is configured like this. -If you're curious about the reasoning behind B950, Bugbear's documentation +If you're curious about the reasoning behind B950, +[Bugbear's documentation](https://github.com/PyCQA/flake8-bugbear#opinionated-warnings) explains it. The tl;dr is "it's like highway speed limits, we won't bother you if you overdo it by a few km/h". @@ -370,6 +376,19 @@ human-readable strings"](https://stackoverflow.com/a/56190)), you can pass `--skip-string-normalization` on the command line. This is meant as an adoption helper, avoid using this for new projects. +### Numeric literals + +*Black* standardizes most numeric literals to use lowercase letters for the +syntactic parts and uppercase letters for the digits themselves: `0xAB` +instead of `0XAB` and `1e10` instead of `1E10`. Python 2 long literals are +styled as `2L` instead of `2l` to avoid confusion between `l` and `1`. In +Python 3.6+, *Black* adds underscores to long numeric literals to aid +readability: `100000000` becomes `100_000_000`. + +For regions where numerals are grouped differently (like [India](https://en.wikipedia.org/wiki/Indian_numbering_system) +and [China](https://en.wikipedia.org/wiki/Chinese_numerals#Whole_numbers)), +the `-N` or `--skip-numeric-underscore-normalization` command line option +makes *Black* preserve underscores in numeric literals. ### Line breaks & binary operators @@ -529,6 +548,8 @@ other file. If you're running with `--verbose`, you will see a blue message if a file was found and used. +Please note `blackd` will not use `pyproject.toml` configuration. + ### Configuration format @@ -654,7 +675,7 @@ Configuration: To install with [vim-plug](https://github.com/junegunn/vim-plug): ``` -Plug 'ambv/black', +Plug 'ambv/black' ``` or with [Vundle](https://github.com/VundleVim/Vundle.vim): @@ -720,7 +741,7 @@ the [Python Language Server](https://github.com/palantir/python-language-server) ### Atom/Nuclide -Use [atom-black](https://github.com/hauntsaninja/atom-black). +Use [python-black](https://atom.io/packages/python-black). ### Other editors @@ -737,6 +758,78 @@ affect your use case. This can be used for example with PyCharm's [File Watchers](https://www.jetbrains.com/help/pycharm/file-watchers.html). +## blackd + +`blackd` is a small HTTP server that exposes *Black*'s functionality over +a simple protocol. The main benefit of using it is to avoid paying the +cost of starting up a new *Black* process every time you want to blacken +a file. + +### Usage + +`blackd` is not packaged alongside *Black* by default because it has additional +dependencies. You will need to do `pip install black[d]` to install it. + +You can start the server on the default port, binding only to the local interface +by running `blackd`. You will see a single line mentioning the server's version, +and the host and port it's listening on. `blackd` will then print an access log +similar to most web servers on standard output, merged with any exception traces +caused by invalid formatting requests. + +`blackd` provides even less options than *Black*. You can see them by running +`blackd --help`: + +```text +Usage: blackd [OPTIONS] + +Options: + --bind-host TEXT Address to bind the server to. + --bind-port INTEGER Port to listen on + --version Show the version and exit. + -h, --help Show this message and exit. +``` + +### Protocol + +`blackd` only accepts `POST` requests at the `/` path. The body of the request +should contain the python source code to be formatted, encoded +according to the `charset` field in the `Content-Type` request header. If no +`charset` is specified, `blackd` assumes `UTF-8`. + +There are a few HTTP headers that control how the source is formatted. These +correspond to command line flags for *Black*. There is one exception to this: +`X-Protocol-Version` which if present, should have the value `1`, otherwise the +request is rejected with `HTTP 501` (Not Implemented). + +The headers controlling how code is formatted are: + + - `X-Line-Length`: corresponds to the `--line-length` command line flag. + - `X-Skip-String-Normalization`: corresponds to the `--skip-string-normalization` + command line flag. If present and its value is not the empty string, no string + normalization will be performed. + - `X-Skip-Numeric-Underscore-Normalization`: corresponds to the + `--skip-numeric-underscore-normalization` command line flag. + - `X-Fast-Or-Safe`: if set to `fast`, `blackd` will act as *Black* does when + passed the `--fast` command line flag. + - `X-Python-Variant`: if set to `pyi`, `blackd` will act as *Black* does when + passed the `--pyi` command line flag. Otherwise, its value must correspond to + a Python version. If this value represents at least Python 3.6, `blackd` will + act as *Black* does when passed the `--py36` command line flag. + +If any of these headers are set to invalid values, `blackd` returns a `HTTP 400` +error response, mentioning the name of the problematic header in the message body. + +Apart from the above, `blackd` can produce the following response codes: + + - `HTTP 204`: If the input is already well-formatted. The response body is + empty. + - `HTTP 200`: If formatting was needed on the input. The response body + contains the blackened Python code, and the `Content-Type` header is set + accordingly. + - `HTTP 400`: If the input contains a syntax error. Details of the error are + returned in the response body. + - `HTTP 500`: If there was any kind of error while trying to format the input. + The response body contains a textual representation of the error. ## Version control integration @@ -785,7 +878,7 @@ as .pyi, and whether string normalization was omitted. > *Black* is opinionated so you don't have to be. -**Hynek Schlawack**, [creator of `attrs`](http://www.attrs.org/), core +**Hynek Schlawack**, [creator of `attrs`](https://www.attrs.org/), core developer of Twisted and CPython: > An auto-formatter that doesn't suck is all I want for Xmas! @@ -840,18 +933,46 @@ More details can be found in [CONTRIBUTING](CONTRIBUTING.md). ## Change Log -### 18.8b0 +### 18.9b0 + +* numeric literals are now formatted by *Black* (#452, #461, #464, #469): + + * numeric literals are normalized to include `_` separators on Python 3.6+ code + + * added `--skip-numeric-underscore-normalization` to disable the above behavior and + leave numeric underscores as they were in the input + + * code with `_` in numeric literals is recognized as Python 3.6+ + + * most letters in numeric literals are lowercased (e.g., in `1e10`, `0x01`) + + * hexadecimal digits are always uppercased (e.g. `0xBADC0DE`) -* numeric literals are now normalized to include `_` separators on Python 3.6+ code - (#452) +* added `blackd`, see [its documentation](#blackd) for more info (#349) + +* adjacent string literals are now correctly split into multiple lines (#463) + +* trailing comma is now added to single imports that don't fit on a line (#250) * cache is now populated when `--check` is successful for a file which speeds up consecutive checks of properly formatted unmodified files (#448) +* whitespace at the beginning of the file is now removed (#399) + +* fixed mangling [pweave](http://mpastell.com/pweave/) and + [Spyder IDE](https://pythonhosted.org/spyder/) special comments (#532) + +* fixed unstable formatting when unpacking big tuples (#267) + * fixed parsing of `__future__` imports with renames (#389) * fixed scope of `# fmt: off` when directly preceding `yield` and other nodes (#385) +* fixed formatting of lambda expressions with default arguments (#468) + +* fixed ``async for`` statements: *Black* no longer breaks them into separate + lines (#372) + * note: the Vim plugin stopped registering ``,=`` as a default chord as it turned out to be a bad idea (#415) @@ -1208,6 +1329,7 @@ Glued together by [Łukasz Langa](mailto:lukasz@langa.pl). Maintained with [Carol Willing](mailto:carolcode@willingconsulting.com), [Carl Meyer](mailto:carl@oddbird.net), +[Jelle Zijlstra](mailto:jelle.zijlstra@gmail.com), [Mika Naylor](mailto:mail@autophagy.io), and [Zsolt Dollenstein](mailto:zsol.zsol@gmail.com). @@ -1216,10 +1338,9 @@ Multiple contributions by: * [Artem Malyshev](mailto:proofit404@gmail.com) * [Christian Heimes](mailto:christian@python.org) * [Daniel M. Capella](mailto:polycitizen@gmail.com) -* [Eli Treuherz](mailto:eli.treuherz@cgi.com) +* [Eli Treuherz](mailto:eli@treuherz.com) * Hugo van Kemenade * [Ivan Katanić](mailto:ivan.katanic@gmail.com) -* [Jelle Zijlstra](mailto:jelle.zijlstra@gmail.com) * [Jonas Obrist](mailto:ojiidotch@gmail.com) * [Luka Sterbic](mailto:luka.sterbic@gmail.com) * [Miguel Gaiowski](mailto:miggaiowski@gmail.com) @@ -1230,3 +1351,4 @@ Multiple contributions by: * [Stavros Korokithakis](mailto:hi@stavros.io) * [Sunil Kapil](mailto:snlkapil@gmail.com) * [Vishwas B Sharma](mailto:sharma.vishwas88@gmail.com) +* [Chuck Wooters](mailto:chuck.wooters@microsoft.com)