X-Git-Url: https://git.madduck.net/etc/vim.git/blobdiff_plain/0c77c58722acc7b594bfb3e12aa4b78a51109b27..1610fd6bc5d594c4f27698825913d2f791d3ea02:/README.md?ds=inline diff --git a/README.md b/README.md index 96a24a1..5f4e14a 100644 --- a/README.md +++ b/README.md @@ -6,8 +6,8 @@ Documentation Status Coverage Status License: MIT -PyPI -Downloads +PyPI +Downloads Code style: black

@@ -35,6 +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)** | @@ -98,7 +99,7 @@ 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. @@ -371,6 +372,19 @@ 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 @@ -530,6 +544,8 @@ 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 @@ -721,7 +737,7 @@ 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 @@ -738,6 +754,78 @@ 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 @@ -786,7 +874,7 @@ 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! @@ -841,22 +929,46 @@ 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` or `0xab`) + +* added `blackd`, see [its documentation](#blackd) for more info (#349) -* numeric literals are now normalized to include `_` separators on Python 3.6+ code - (#452) +* adjacent string literals are now correctly split into multiple lines (#463) * cache is now populated when `--check` is successful for a file which speeds up consecutive checks of properly formatted unmodified files (#448) +* code with `_` in numeric literals is recognized as Python 3.6+ (#461) + +* 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) +* trailing comma is now added to single imports that don't fit on a line (#250) + + ### 18.6b4 * hotfix: don't freeze when multiple comments directly precede `# fmt: off` (#371) @@ -1218,7 +1330,7 @@ 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) * [Jonas Obrist](mailto:ojiidotch@gmail.com)