From: Łukasz Langa Date: Fri, 21 Aug 2020 13:55:03 +0000 (+0200) Subject: Fix dealing with generated files in docs X-Git-Url: https://git.madduck.net/etc/vim.git/commitdiff_plain/205f3b67fbddc7ba0fa330c0493821e404451b82?ds=inline Fix dealing with generated files in docs --- diff --git a/docs/authors.md b/docs/authors.md new file mode 100644 index 0000000..6a3a8d6 --- /dev/null +++ b/docs/authors.md @@ -0,0 +1,183 @@ +[//]: # "NOTE: THIS FILE WAS AUTOGENERATED FROM README.md" + +# Authors + +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), +[Zsolt Dollenstein](mailto:zsol.zsol@gmail.com), and +[Cooper Lees](mailto:me@cooperlees.com). + +Multiple contributions by: + +- [Abdur-Rahmaan Janhangeer](mailto:arj.python@gmail.com) +- [Adam Johnson](mailto:me@adamj.eu) +- [Adam Williamson](mailto:adamw@happyassassin.net) +- [Alexander Huynh](mailto:github@grande.coffee) +- [Alex Vandiver](mailto:github@chmrr.net) +- [Allan Simon](mailto:allan.simon@supinfo.com) +- Anders-Petter Ljungquist +- [Andrew Thorp](mailto:andrew.thorp.dev@gmail.com) +- [Andrew Zhou](mailto:andrewfzhou@gmail.com) +- [Andrey](mailto:dyuuus@yandex.ru) +- [Andy Freeland](mailto:andy@andyfreeland.net) +- [Anthony Sottile](mailto:asottile@umich.edu) +- [Arjaan Buijk](mailto:arjaan.buijk@gmail.com) +- [Arnav Borbornah](mailto:arnavborborah11@gmail.com) +- [Artem Malyshev](mailto:proofit404@gmail.com) +- [Asger Hautop Drewsen](mailto:asgerdrewsen@gmail.com) +- [Augie Fackler](mailto:raf@durin42.com) +- [Aviskar KC](mailto:aviskarkc10@gmail.com) +- Batuhan Taşkaya +- [Benjamin Wohlwend](mailto:bw@piquadrat.ch) +- [Benjamin Woodruff](mailto:github@benjam.info) +- [Bharat Raghunathan](mailto:bharatraghunthan9767@gmail.com) +- [Brandt Bucher](mailto:brandtbucher@gmail.com) +- [Brett Cannon](mailto:brett@python.org) +- [Bryan Bugyi](mailto:bryan.bugyi@rutgers.edu) +- [Bryan Forbes](mailto:bryan@reigndropsfall.net) +- [Calum Lind](mailto:calumlind@gmail.com) +- [Charles](mailto:peacech@gmail.com) +- Charles Reid +- [Christian Clauss](mailto:cclauss@bluewin.ch) +- [Christian Heimes](mailto:christian@python.org) +- [Chuck Wooters](mailto:chuck.wooters@microsoft.com) +- [Chris Rose](mailto:offline@offby1.net) +- Codey Oxley +- [Cong](mailto:congusbongus@gmail.com) +- [Cooper Ry Lees](mailto:me@cooperlees.com) +- [Dan Davison](mailto:dandavison7@gmail.com) +- [Daniel Hahler](mailto:github@thequod.de) +- [Daniel M. 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Vascellaro](mailto:S.Vascellaro@gmail.com) +- [Sunil Kapil](mailto:snlkapil@gmail.com) +- [Sébastien Eustace](mailto:sebastien.eustace@gmail.com) +- [Tal Amuyal](mailto:TalAmuyal@gmail.com) +- [Terrance](mailto:git@terrance.allofti.me) +- [Thom Lu](mailto:thomas.c.lu@gmail.com) +- [Thomas Grainger](mailto:tagrain@gmail.com) +- [Tim Gates](mailto:tim.gates@iress.com) +- [Tim Swast](mailto:swast@google.com) +- [Timo](mailto:timo_tk@hotmail.com) +- Toby Fleming +- [Tom Christie](mailto:tom@tomchristie.com) +- [Tony Narlock](mailto:tony@git-pull.com) +- [Tsuyoshi Hombashi](mailto:tsuyoshi.hombashi@gmail.com) +- [Tushar Chandra](mailto:tusharchandra2018@u.northwestern.edu) +- [Tzu-ping Chung](mailto:uranusjr@gmail.com) +- [Utsav Shah](mailto:ukshah2@illinois.edu) +- utsav-dbx +- vezeli +- [Ville Skyttä](mailto:ville.skytta@iki.fi) +- [Vishwas B Sharma](mailto:sharma.vishwas88@gmail.com) +- [Vlad Emelianov](mailto:volshebnyi@gmail.com) +- [williamfzc](mailto:178894043@qq.com) +- [wouter bolsterlee](mailto:wouter@bolsterl.ee) +- Yazdan +- [Yngve Høiseth](mailto:yngve@hoiseth.net) +- [Yurii Karabas](mailto:1998uriyyo@gmail.com) diff --git a/docs/change_log.md b/docs/change_log.md new file mode 100644 index 0000000..3cc8c40 --- /dev/null +++ b/docs/change_log.md @@ -0,0 +1,467 @@ +[//]: # "NOTE: THIS FILE WAS AUTOGENERATED FROM CHANGES.md" + +## Change Log + +### Unreleased + +#### _Black_ + +- re-implemented support for explicit trailing commas: now it works consistently within + any bracket pair, including nested structures (#1288 and duplicates) + +- reindent docstrings when reindenting code around it (#1053) + +- show colored diffs (#1266) + +- move to 'py3' tagged wheels (#1388) + +- remove deprecated `--py36` option (#1236) + +- add `--force-exclude` argument (#1032) + +#### Vim plugin + +- prefer virtualenv packages over global packages (#1383) + +### 19.10b0 + +- added support for PEP 572 assignment expressions (#711) + +- added support for PEP 570 positional-only arguments (#943) + +- added support for async generators (#593) + +- added support for pre-splitting collections by putting an explicit trailing comma + inside (#826) + +- added `black -c` as a way to format code passed from the command line (#761) + +- --safe now works with Python 2 code (#840) + +- fixed grammar selection for Python 2-specific code (#765) + +- fixed feature detection for trailing commas in function definitions and call sites + (#763) + +- `# fmt: off`/`# fmt: on` comment pairs placed multiple times within the same block of + code now behave correctly (#1005) + +- _Black_ no longer crashes on Windows machines with more than 61 cores (#838) + +- _Black_ no longer crashes on standalone comments prepended with a backslash (#767) + +- _Black_ no longer crashes on `from` ... `import` blocks with comments (#829) + +- _Black_ no longer crashes on Python 3.7 on some platform configurations (#494) + +- _Black_ no longer fails on comments in from-imports (#671) + +- _Black_ no longer fails when the file starts with a backslash (#922) + +- _Black_ no longer merges regular comments with type comments (#1027) + +- _Black_ no longer splits long lines that contain type comments (#997) + +- removed unnecessary parentheses around `yield` expressions (#834) + +- added parentheses around long tuples in unpacking assignments (#832) + +- added parentheses around complex powers when they are prefixed by a unary operator + (#646) + +- fixed bug that led _Black_ format some code with a line length target of 1 (#762) + +- _Black_ no longer introduces quotes in f-string subexpressions on string boundaries + (#863) + +- if _Black_ puts parenthesis around a single expression, it moves comments to the + wrapped expression instead of after the brackets (#872) + +- `blackd` now returns the version of _Black_ in the response headers (#1013) + +- `blackd` can now output the diff of formats on source code when the `X-Diff` header is + provided (#969) + +### 19.3b0 + +- new option `--target-version` to control which Python versions _Black_-formatted code + should target (#618) + +- deprecated `--py36` (use `--target-version=py36` instead) (#724) + +- _Black_ no longer normalizes numeric literals to include `_` separators (#696) + +- long `del` statements are now split into multiple lines (#698) + +- type comments are no longer mangled in function signatures + +- improved performance of formatting deeply nested data structures (#509) + +- _Black_ now properly formats multiple files in parallel on Windows (#632) + +- _Black_ now creates cache files atomically which allows it to be used in parallel + pipelines (like `xargs -P8`) (#673) + +- _Black_ now correctly indents comments in files that were previously formatted with + tabs (#262) + +- `blackd` now supports CORS (#622) + +### 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`) + +- 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://www.spyder-ide.org/) 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) + +### 18.6b4 + +- hotfix: don't freeze when multiple comments directly precede `# fmt: off` (#371) + +### 18.6b3 + +- typing stub files (`.pyi`) now have blank lines added after constants (#340) + +- `# fmt: off` and `# fmt: on` are now much more dependable: + + - they now work also within bracket pairs (#329) + + - they now correctly work across function/class boundaries (#335) + + - they now work when an indentation block starts with empty lines or misaligned + comments (#334) + +- made Click not fail on invalid environments; note that Click is right but the + likelihood we'll need to access non-ASCII file paths when dealing with Python source + code is low (#277) + +- fixed improper formatting of f-strings with quotes inside interpolated expressions + (#322) + +- fixed unnecessary slowdown when long list literals where found in a file + +- fixed unnecessary slowdown on AST nodes with very many siblings + +- fixed cannibalizing backslashes during string normalization + +- fixed a crash due to symbolic links pointing outside of the project directory (#338) + +### 18.6b2 + +- added `--config` (#65) + +- added `-h` equivalent to `--help` (#316) + +- fixed improper unmodified file caching when `-S` was used + +- fixed extra space in string unpacking (#305) + +- fixed formatting of empty triple quoted strings (#313) + +- fixed unnecessary slowdown in comment placement calculation on lines without comments + +### 18.6b1 + +- hotfix: don't output human-facing information on stdout (#299) + +- hotfix: don't output cake emoji on non-zero return code (#300) + +### 18.6b0 + +- added `--include` and `--exclude` (#270) + +- added `--skip-string-normalization` (#118) + +- added `--verbose` (#283) + +- the header output in `--diff` now actually conforms to the unified diff spec + +- fixed long trivial assignments being wrapped in unnecessary parentheses (#273) + +- fixed unnecessary parentheses when a line contained multiline strings (#232) + +- fixed stdin handling not working correctly if an old version of Click was used (#276) + +- _Black_ now preserves line endings when formatting a file in place (#258) + +### 18.5b1 + +- added `--pyi` (#249) + +- added `--py36` (#249) + +- Python grammar pickle caches are stored with the formatting caches, making _Black_ + work in environments where site-packages is not user-writable (#192) + +- _Black_ now enforces a PEP 257 empty line after a class-level docstring (and/or + fields) and the first method + +- fixed invalid code produced when standalone comments were present in a trailer that + was omitted from line splitting on a large expression (#237) + +- fixed optional parentheses being removed within `# fmt: off` sections (#224) + +- fixed invalid code produced when stars in very long imports were incorrectly wrapped + in optional parentheses (#234) + +- fixed unstable formatting when inline comments were moved around in a trailer that was + omitted from line splitting on a large expression (#238) + +- fixed extra empty line between a class declaration and the first method if no class + docstring or fields are present (#219) + +- fixed extra empty line between a function signature and an inner function or inner + class (#196) + +### 18.5b0 + +- call chains are now formatted according to the + [fluent interfaces](https://en.wikipedia.org/wiki/Fluent_interface) style (#67) + +- data structure literals (tuples, lists, dictionaries, and sets) are now also always + exploded like imports when they don't fit in a single line (#152) + +- slices are now formatted according to PEP 8 (#178) + +- parentheses are now also managed automatically on the right-hand side of assignments + and return statements (#140) + +- math operators now use their respective priorities for delimiting multiline + expressions (#148) + +- optional parentheses are now omitted on expressions that start or end with a bracket + and only contain a single operator (#177) + +- empty parentheses in a class definition are now removed (#145, #180) + +- string prefixes are now standardized to lowercase and `u` is removed on Python 3.6+ + only code and Python 2.7+ code with the `unicode_literals` future import (#188, #198, + #199) + +- typing stub files (`.pyi`) are now formatted in a style that is consistent with PEP + 484 (#207, #210) + +- progress when reformatting many files is now reported incrementally + +- fixed trailers (content with brackets) being unnecessarily exploded into their own + lines after a dedented closing bracket (#119) + +- fixed an invalid trailing comma sometimes left in imports (#185) + +- fixed non-deterministic formatting when multiple pairs of removable parentheses were + used (#183) + +- fixed multiline strings being unnecessarily wrapped in optional parentheses in long + assignments (#215) + +- fixed not splitting long from-imports with only a single name + +- fixed Python 3.6+ file discovery by also looking at function calls with unpacking. + This fixed non-deterministic formatting if trailing commas where used both in function + signatures with stars and function calls with stars but the former would be + reformatted to a single line. + +- fixed crash on dealing with optional parentheses (#193) + +- fixed "is", "is not", "in", and "not in" not considered operators for splitting + purposes + +- fixed crash when dead symlinks where encountered + +### 18.4a4 + +- don't populate the cache on `--check` (#175) + +### 18.4a3 + +- added a "cache"; files already reformatted that haven't changed on disk won't be + reformatted again (#109) + +- `--check` and `--diff` are no longer mutually exclusive (#149) + +- generalized star expression handling, including double stars; this fixes + multiplication making expressions "unsafe" for trailing commas (#132) + +- _Black_ no longer enforces putting empty lines behind control flow statements (#90) + +- _Black_ now splits imports like "Mode 3 + trailing comma" of isort (#127) + +- fixed comment indentation when a standalone comment closes a block (#16, #32) + +- fixed standalone comments receiving extra empty lines if immediately preceding a + class, def, or decorator (#56, #154) + +- fixed `--diff` not showing entire path (#130) + +- fixed parsing of complex expressions after star and double stars in function calls + (#2) + +- fixed invalid splitting on comma in lambda arguments (#133) + +- fixed missing splits of ternary expressions (#141) + +### 18.4a2 + +- fixed parsing of unaligned standalone comments (#99, #112) + +- fixed placement of dictionary unpacking inside dictionary literals (#111) + +- Vim plugin now works on Windows, too + +- fixed unstable formatting when encountering unnecessarily escaped quotes in a string + (#120) + +### 18.4a1 + +- added `--quiet` (#78) + +- added automatic parentheses management (#4) + +- added [pre-commit](https://pre-commit.com) integration (#103, #104) + +- fixed reporting on `--check` with multiple files (#101, #102) + +- fixed removing backslash escapes from raw strings (#100, #105) + +### 18.4a0 + +- added `--diff` (#87) + +- add line breaks before all delimiters, except in cases like commas, to better comply + with PEP 8 (#73) + +- standardize string literals to use double quotes (almost) everywhere (#75) + +- fixed handling of standalone comments within nested bracketed expressions; _Black_ + will no longer produce super long lines or put all standalone comments at the end of + the expression (#22) + +- fixed 18.3a4 regression: don't crash and burn on empty lines with trailing whitespace + (#80) + +- fixed 18.3a4 regression: `# yapf: disable` usage as trailing comment would cause + _Black_ to not emit the rest of the file (#95) + +- when CTRL+C is pressed while formatting many files, _Black_ no longer freaks out with + a flurry of asyncio-related exceptions + +- only allow up to two empty lines on module level and only single empty lines within + functions (#74) + +### 18.3a4 + +- `# fmt: off` and `# fmt: on` are implemented (#5) + +- automatic detection of deprecated Python 2 forms of print statements and exec + statements in the formatted file (#49) + +- use proper spaces for complex expressions in default values of typed function + arguments (#60) + +- only return exit code 1 when --check is used (#50) + +- don't remove single trailing commas from square bracket indexing (#59) + +- don't omit whitespace if the previous factor leaf wasn't a math operator (#55) + +- omit extra space in kwarg unpacking if it's the first argument (#46) + +- omit extra space in + [Sphinx auto-attribute comments](http://www.sphinx-doc.org/en/stable/ext/autodoc.html#directive-autoattribute) + (#68) + +### 18.3a3 + +- don't remove single empty lines outside of bracketed expressions (#19) + +- added ability to pipe formatting from stdin to stdin (#25) + +- restored ability to format code with legacy usage of `async` as a name (#20, #42) + +- even better handling of numpy-style array indexing (#33, again) + +### 18.3a2 + +- changed positioning of binary operators to occur at beginning of lines instead of at + the end, following + [a recent change to PEP 8](https://github.com/python/peps/commit/c59c4376ad233a62ca4b3a6060c81368bd21e85b) + (#21) + +- ignore empty bracket pairs while splitting. This avoids very weirdly looking + formattings (#34, #35) + +- remove a trailing comma if there is a single argument to a call + +- if top level functions were separated by a comment, don't put four empty lines after + the upper function + +- fixed unstable formatting of newlines with imports + +- fixed unintentional folding of post scriptum standalone comments into last statement + if it was a simple statement (#18, #28) + +- fixed missing space in numpy-style array indexing (#33) + +- fixed spurious space after star-based unary expressions (#31) + +### 18.3a1 + +- added `--check` + +- only put trailing commas in function signatures and calls if it's safe to do so. If + the file is Python 3.6+ it's always safe, otherwise only safe if there are no `*args` + or `**kwargs` used in the signature or call. (#8) + +- fixed invalid spacing of dots in relative imports (#6, #13) + +- fixed invalid splitting after comma on unpacked variables in for-loops (#23) + +- fixed spurious space in parenthesized set expressions (#7) + +- fixed spurious space after opening parentheses and in default arguments (#14, #17) + +- fixed spurious space after unary operators when the operand was a complex expression + (#15) + +### 18.3a0 + +- first published version, Happy 🍰 Day 2018! + +- alpha quality + +- date-versioned (see: https://calver.org/) diff --git a/docs/conf.py b/docs/conf.py index 9e6a9bc..8dd77b4 100644 --- a/docs/conf.py +++ b/docs/conf.py @@ -184,11 +184,9 @@ def process_sections( contents = fix_headers(contents) with open(target_path, "w", encoding="utf-8") as f: - if section.src.suffix == ".md": - f.write( - "[//]: # (NOTE: THIS FILE WAS AUTOGENERATED FROM" - f" {section.src})\n\n" - ) + if section.src.suffix == ".md" and section.src != target_path: + rel = section.src.resolve().relative_to(CURRENT_DIR.parent) + f.write(f'[//]: # "NOTE: THIS FILE WAS AUTOGENERATED FROM {rel}"\n\n') f.write(contents) processed_sections.add(section.name) modified_files.add(target_path) diff --git a/docs/contributing_to_black.md b/docs/contributing_to_black.md new file mode 100644 index 0000000..e5307ad --- /dev/null +++ b/docs/contributing_to_black.md @@ -0,0 +1,70 @@ +[//]: # "NOTE: THIS FILE WAS AUTOGENERATED FROM CONTRIBUTING.md" + +# Contributing to _Black_ + +Welcome! Happy to see you willing to make the project better. Have you read the entire +[user documentation](https://black.readthedocs.io/en/latest/) yet? + +## Bird's eye view + +In terms of inspiration, _Black_ is about as configurable as _gofmt_. This is +deliberate. + +Bug reports and fixes are always welcome! Please follow the +[issue template on GitHub](https://github.com/psf/black/issues/new) for best results. + +Before you suggest a new feature or configuration knob, ask yourself why you want it. If +it enables better integration with some workflow, fixes an inconsistency, speeds things +up, and so on - go for it! On the other hand, if your answer is "because I don't like a +particular formatting" then you're not ready to embrace _Black_ yet. Such changes are +unlikely to get accepted. You can still try but prepare to be disappointed. + +## Technicalities + +Development on the latest version of Python is preferred. As of this writing it's 3.8. +You can use any operating system. I am using macOS myself and CentOS at work. + +Install all development dependencies using: + +```console +$ pipenv install --dev +$ pipenv shell +$ pre-commit install +``` + +If you haven't used `pipenv` before but are comfortable with virtualenvs, just run +`pip install pipenv` in the virtualenv you're already using and invoke the command above +from the cloned _Black_ repo. It will do the correct thing. + +Before submitting pull requests, run lints and tests with: + +```console +$ pre-commit run -a +$ python -m unittest +$ black-primer [-k -w /tmp/black_test_repos] +``` + +## black-primer + +`black-primer` is used by CI to pull down well-known _Black_ formatted projects and see +if we get source code changes. It will error on formatting changes or errors. Please run +before pushing your PR to see if you get the actions you would expect from _Black_ with +your PR. You may need to change +[primer.json](https://github.com/psf/black/blob/master/src/black_primer/primer.json) +configuration for it to pass. + +For more `black-primer` information visit the +[documentation](https://github.com/psf/black/blob/master/docs/black_primer.md). + +## Hygiene + +If you're fixing a bug, add a test. Run it first to confirm it fails, then fix the bug, +run it again to confirm it's really fixed. + +If adding a new feature, add a test. In fact, always add a test. But wait, before adding +any large feature, first open an issue for us to discuss the idea first. + +## Finally + +Thanks again for your interest in improving the project! You're taking action when most +people decide to sit and watch. diff --git a/docs/github_actions.md b/docs/github_actions.md new file mode 100644 index 0000000..7ff8754 --- /dev/null +++ b/docs/github_actions.md @@ -0,0 +1,19 @@ +[//]: # "NOTE: THIS FILE WAS AUTOGENERATED FROM README.md" + +# GitHub Actions + +Create a file named `.github/workflows/black.yml` inside your repository with: + +```yaml +name: Lint + +on: [push, pull_request] + +jobs: + lint: + runs-on: ubuntu-latest + steps: + - uses: actions/checkout@v2 + - uses: actions/setup-python@v2 + - uses: psf/black@stable +``` diff --git a/docs/ignoring_unmodified_files.md b/docs/ignoring_unmodified_files.md new file mode 100644 index 0000000..a915f4e --- /dev/null +++ b/docs/ignoring_unmodified_files.md @@ -0,0 +1,23 @@ +[//]: # "NOTE: THIS FILE WAS AUTOGENERATED FROM README.md" + +# Ignoring unmodified files + +_Black_ remembers files it has already formatted, unless the `--diff` flag is used or +code is passed via standard input. This information is stored per-user. The exact +location of the file depends on the _Black_ version and the system on which _Black_ is +run. The file is non-portable. The standard location on common operating systems is: + +- Windows: + `C:\\Users\\AppData\Local\black\black\Cache\\cache...pickle` +- macOS: + `/Users//Library/Caches/black//cache...pickle` +- Linux: + `/home//.cache/black//cache...pickle` + +`file-mode` is an int flag that determines whether the file was formatted as 3.6+ only, +as .pyi, and whether string normalization was omitted. + +To override the location of these files on macOS or Linux, set the environment variable +`XDG_CACHE_HOME` to your preferred location. For example, if you want to put the cache +in the directory you're running _Black_ from, set `XDG_CACHE_HOME=.cache`. _Black_ will +then write the above files to `.cache/black//`. diff --git a/docs/installation_and_usage.md b/docs/installation_and_usage.md new file mode 100644 index 0000000..cc02691 --- /dev/null +++ b/docs/installation_and_usage.md @@ -0,0 +1,179 @@ +[//]: # "NOTE: THIS FILE WAS AUTOGENERATED FROM README.md" + +# Installation and usage + +## Installation + +_Black_ can be installed by running `pip install black`. It requires Python 3.6.0+ to +run but you can reformat Python 2 code with it, too. + +### Install from GitHub + +If you can't wait for the latest _hotness_ and want to install from GitHub, use: + +`pip install git+git://github.com/psf/black` + +## Usage + +To get started right away with sensible defaults: + +```sh +black {source_file_or_directory} +``` + +You can run _Black_ as a package if running it as a script doesn't work: + +```sh +python -m black {source_file_or_directory} +``` + +## Command line options + +_Black_ doesn't provide many options. You can list them by running `black --help`: + +```text +Usage: black [OPTIONS] [SRC]... + + The uncompromising code formatter. + +Options: + -c, --code TEXT Format the code passed in as a string. + -l, --line-length INTEGER How many characters per line to allow. + [default: 88] + + -t, --target-version [py27|py33|py34|py35|py36|py37|py38] + Python versions that should be supported by + Black's output. [default: per-file auto- + detection] + + --pyi Format all input files like typing stubs + regardless of file extension (useful when + piping source on standard input). + + -S, --skip-string-normalization + Don't normalize string quotes or prefixes. + --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 reformatted. Return code 123 means + there was an internal error. + + --diff Don't write the files back, just output a + diff for each file on stdout. + + --color / --no-color Show colored diff. Only applies when + `--diff` is given. + + --fast / --safe If --fast given, skip temporary sanity + checks. [default: --safe] + + --include TEXT A regular expression that matches files and + directories that should be included on + recursive searches. An empty value means + all files are included regardless of the + name. Use forward slashes for directories + on all platforms (Windows, too). Exclusions + are calculated first, inclusions later. + [default: \.pyi?$] + + --exclude TEXT A regular expression that matches files and + directories that should be excluded on + recursive searches. An empty value means no + paths are excluded. Use forward slashes for + directories on all platforms (Windows, too). + Exclusions are calculated first, inclusions + later. [default: /(\.eggs|\.git|\.hg|\.mypy + _cache|\.nox|\.tox|\.venv|\.svn|_build|buck- + out|build|dist)/] + + --force-exclude TEXT Like --exclude, but files and directories + matching this regex will be excluded even + when they are passed explicitly as arguments + + -q, --quiet Don't emit non-error messages to stderr. + Errors are still emitted; silence those with + 2>/dev/null. + + -v, --verbose Also emit messages to stderr about files + that were not changed or were ignored due to + --exclude=. + + --version Show the version and exit. + --config FILE Read configuration from FILE path. + -h, --help Show this message and exit. +``` + +_Black_ is a well-behaved Unix-style command-line tool: + +- it does nothing if no sources are passed to it; +- it will read from standard input and write to standard output if `-` is used as the + filename; +- it only outputs messages to users on standard error; +- exits with code 0 unless an internal error occurred (or `--check` was used). + +## Using _Black_ with other tools + +While _Black_ enforces formatting that conforms to PEP 8, other tools may raise warnings +about _Black_'s changes or will overwrite _Black_'s changes. A good example of this is +[isort](https://pypi.org/p/isort). Since _Black_ is barely configurable, these tools +should be configured to neither warn about nor overwrite _Black_'s changes. + +Actual details on _Black_ compatible configurations for various tools can be found in +[compatible_configs](https://github.com/psf/black/blob/master/docs/compatible_configs.md). + +## Migrating your code style without ruining git blame + +A long-standing argument against moving to automated code formatters like _Black_ is +that the migration will clutter up the output of `git blame`. This was a valid argument, +but since Git version 2.23, Git natively supports +[ignoring revisions in blame](https://git-scm.com/docs/git-blame#Documentation/git-blame.txt---ignore-revltrevgt) +with the `--ignore-rev` option. You can also pass a file listing the revisions to ignore +using the `--ignore-revs-file` option. The changes made by the revision will be ignored +when assigning blame. Lines modified by an ignored revision will be blamed on the +previous revision that modified those lines. + +So when migrating your project's code style to _Black_, reformat everything and commit +the changes (preferably in one massive commit). Then put the full 40 characters commit +identifier(s) into a file. + +``` +# Migrate code style to Black +5b4ab991dede475d393e9d69ec388fd6bd949699 +``` + +Afterwards, you can pass that file to `git blame` and see clean and meaningful blame +information. + +```console +$ git blame important.py --ignore-revs-file .git-blame-ignore-revs +7a1ae265 (John Smith 2019-04-15 15:55:13 -0400 1) def very_important_function(text, file): +abdfd8b0 (Alice Doe 2019-09-23 11:39:32 -0400 2) text = text.lstrip() +7a1ae265 (John Smith 2019-04-15 15:55:13 -0400 3) with open(file, "r+") as f: +7a1ae265 (John Smith 2019-04-15 15:55:13 -0400 4) f.write(formatted) +``` + +You can even configure `git` to automatically ignore revisions listed in a file on every +call to `git blame`. + +```console +$ git config blame.ignoreRevsFile .git-blame-ignore-revs +``` + +**The one caveat is that GitHub and GitLab do not yet support ignoring revisions using +their native UI of blame.** So blame information will be cluttered with a reformatting +commit on those platforms. (If you'd like this feature, there's an open issue for +[GitLab](https://gitlab.com/gitlab-org/gitlab/-/issues/31423) and please let GitHub +know!) + +## NOTE: This is a beta product + +_Black_ is already [successfully used](#used-by) by many projects, small and big. It +also sports a decent test suite. However, it is still very new. Things will probably be +wonky for a while. This is made explicit by the "Beta" trove classifier, as well as by +the "b" in the version number. What this means for you is that **until the formatter +becomes stable, you should expect some formatting to change in the future**. That being +said, no drastic stylistic changes are planned, mostly responses to bug reports. + +Also, as a temporary safety measure, _Black_ will check that the reformatted code still +produces a valid AST that is equivalent to the original. This slows it down. If you're +feeling confident, use `--fast`. diff --git a/docs/pyproject_toml.md b/docs/pyproject_toml.md new file mode 100644 index 0000000..cd31345 --- /dev/null +++ b/docs/pyproject_toml.md @@ -0,0 +1,88 @@ +[//]: # "NOTE: THIS FILE WAS AUTOGENERATED FROM README.md" + +# pyproject.toml + +_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. + +**Pro-tip**: If you're asking yourself "Do I need to configure anything?" the answer is +"No". _Black_ is all about sensible defaults. + +## What on Earth is a `pyproject.toml` file? + +[PEP 518](https://www.python.org/dev/peps/pep-0518/) defines `pyproject.toml` as a +configuration file to store build system requirements for Python projects. With the help +of tools like [Poetry](https://python-poetry.org/) or +[Flit](https://flit.readthedocs.io/en/latest/) it can fully replace the need for +`setup.py` and `setup.cfg` files. + +## Where _Black_ looks for the file + +By default _Black_ looks for `pyproject.toml` starting from the common base directory of +all files and directories passed on the command line. If it's not there, it looks in +parent directories. It stops looking when it finds the file, or a `.git` directory, or a +`.hg` directory, or the root of the file system, whichever comes first. + +If you're formatting standard input, _Black_ will look for configuration starting from +the current working directory. + +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. + +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 + +As the file extension suggests, `pyproject.toml` is a +[TOML](https://github.com/toml-lang/toml) file. It contains separate sections for +different tools. _Black_ is using the `[tool.black]` section. The option keys are the +same as long names of options on the command line. + +Note that you have to use single-quoted strings in TOML for regular expressions. It's +the equivalent of r-strings in Python. Multiline strings are treated as verbose regular +expressions by Black. Use `[ ]` to denote a significant space character. + +
+Example pyproject.toml + +```toml +[tool.black] +line-length = 88 +target-version = ['py37'] +include = '\.pyi?$' +exclude = ''' + +( + /( + \.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 +) +''' +``` + +
+ +## Lookup hierarchy + +Command-line options have defaults that you can see in `--help`. A `pyproject.toml` can +override those defaults. Finally, options provided by the user on the command line +override both. + +_Black_ will only ever use one `pyproject.toml` file during an entire run. It doesn't +look for multiple files, and doesn't compose configuration from different levels of the +file hierarchy. diff --git a/docs/show_your_style.md b/docs/show_your_style.md new file mode 100644 index 0000000..67b213c --- /dev/null +++ b/docs/show_your_style.md @@ -0,0 +1,19 @@ +[//]: # "NOTE: THIS FILE WAS AUTOGENERATED FROM README.md" + +# Show your style + +Use the badge in your project's README.md: + +```md +[![Code style: black](https://img.shields.io/badge/code%20style-black-000000.svg)](https://github.com/psf/black) +``` + +Using the badge in README.rst: + +``` +.. image:: https://img.shields.io/badge/code%20style-black-000000.svg + :target: https://github.com/psf/black +``` + +Looks like this: +[![Code style: black](https://img.shields.io/badge/code%20style-black-000000.svg)](https://github.com/psf/black) diff --git a/docs/version_control_integration.md b/docs/version_control_integration.md new file mode 100644 index 0000000..25dac30 --- /dev/null +++ b/docs/version_control_integration.md @@ -0,0 +1,28 @@ +[//]: # "NOTE: THIS FILE WAS AUTOGENERATED FROM README.md" + +# Version control integration + +Use [pre-commit](https://pre-commit.com/). Once you +[have it installed](https://pre-commit.com/#install), add this to the +`.pre-commit-config.yaml` in your repository: + +```yaml +repos: + - repo: https://github.com/psf/black + rev: 19.10b0 # Replace by any tag/version: https://github.com/psf/black/tags + hooks: + - id: black + language_version: python3 # Should be a command that runs python3.6+ +``` + +Then run `pre-commit install` and you're ready to go. + +Avoid using `args` in the hook. Instead, store necessary configuration in +`pyproject.toml` so that editors and command-line usage of Black all behave consistently +for your project. See _Black_'s own +[pyproject.toml](https://github.com/psf/black/blob/master/pyproject.toml) for an +example. + +If you're already using Python 3.7, switch the `language_version` accordingly. Finally, +`stable` is a branch that tracks the latest release on PyPI. If you'd rather run on +master, this is also an option.