Refactor `reformat_one` and `schedule_formatting` to decrease state

[etc/vim.git] / README.md

diff --git a/README.md b/README.md
index 38622cd3c7b89e71acf9d8d0a17a7d80dd0d478a..5be349e42f28bbb5c5799ffd13f95de9bd984a2e 100644 (file)
--- a/README.md
+++ b/README.md
@@ -289,6 +289,33 @@ a bit easier than double quotes.  The latter requires use of the Shift
 key.  My recommendation here is to keep using whatever is faster to type
 and let *Black* handle the transformation.
 
+### Line Breaks & Binary Operators
+
+*Black* will break a line before a binary operator when splitting a block
+of code over multiple lines. This is so that *Black* is compliant with the
+recent changes in the [PEP 8](https://www.python.org/dev/peps/pep-0008/#should-a-line-break-before-or-after-a-binary-operator)
+style guide, which emphasizes that this approach improves readability.
+
+This behaviour may raise ``W503 line break before binary operator`` warnings in
+style guide enforcement tools like Flake8. Since ``W503`` is not PEP 8 compliant,
+you should tell Flake8 to ignore these warnings.
+
+### Parentheses
+
+Some parentheses are optional in the Python grammar.  Any expression can
+be wrapped in a pair of parentheses to form an atom.  There are a few
+interesting cases:
+
+- `if (...):`
+- `while (...):`
+- `for (...) in (...):`
+- `assert (...), (...)`
+- `from X import (...)`
+
+In those cases, parentheses are removed when the entire statement fits
+in one line, or if the inner expression doesn't have any delimiters to
+further split on.  Otherwise, the parentheses are always added.
+
 
 ## Editor integration
 
@@ -297,6 +324,36 @@ and let *Black* handle the transformation.
 Use [proofit404/blacken](https://github.com/proofit404/blacken).
 
 
+### PyCharm
+
+1. Install `black`.
+
+        $ pip install black
+
+2. Locate your `black` installation folder.
+
+  On MacOS / Linux / BSD:
+
+        $ which black
+        /usr/local/bin/black  # possible location
+
+  On Windows:
+
+        $ where black
+        %LocalAppData%\Programs\Python\Python36-32\Scripts\black.exe  # possible location
+
+3. Open External tools in PyCharm with `File -> Settings -> Tools -> External Tools`.
+
+4. Click the + icon to add a new external tool with the following values:
+    - Name: Black
+    - Description: Black is the uncompromising Python code formatter.
+    - Program: <install_location_from_step_2>
+    - Arguments: $FilePath$
+
+5. Format the currently opened file by selecting `Tools -> External Tools -> black`.
+    - Alternatively, you can set a keyboard shortcut by navigating to `Preferences -> Keymap`.
+
+
 ### Vim
 
 Commands and shortcuts:
@@ -340,6 +397,9 @@ to do this.
 
 Use [joslarson.black-vscode](https://marketplace.visualstudio.com/items?itemName=joslarson.black-vscode).
 
+### SublimeText 3
+
+Use [sublack plugin](https://github.com/jgirardet/sublack).
 
 ### Other editors
 
@@ -379,6 +439,20 @@ the line length if you really need to.  If you're already using Python
 that is pinned to the latest release on PyPI.  If you'd rather run on
 master, this is also an option.
 
+
+## Ignoring non-modified files
+
+*Black* remembers files it 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\<username>\AppData\Local\black\black\Cache\<version>\cache.pickle`
+* macOS: `/Users/<username>/Library/Caches/black/<version>/cache.pickle`
+* Linux: `/home/<username>/.cache/black/<version>/cache.pickle`
+
+
 ## Testimonials
 
 **Dusty Phillips**, [writer](https://smile.amazon.com/s/ref=nb_sb_noss?url=search-alias%3Daps&field-keywords=dusty+phillips):
@@ -434,16 +508,44 @@ More details can be found in [CONTRIBUTING](CONTRIBUTING.md).
 
 ## Change Log
 
+### 18.4a3 (unreleased)
+
+* added a "cache"; files already reformatted that haven't changed on disk
+  won't be reformatted again (#109)
+
+* generalized star expression handling, including double stars; this
+  fixes multiplication making expressions "unsafe" for trailing commas (#132)
+
+* fixed parsing of complex expressions after star and double stars in
+  function parameters (#2)
+
+* fixed invalid splitting on comma in lambda arguments (#133)
+
+### 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)
@@ -569,8 +671,9 @@ More details can be found in [CONTRIBUTING](CONTRIBUTING.md).
 Glued together by [Łukasz Langa](mailto:lukasz@langa.pl).
 
 Maintained with [Carol Willing](mailto:carolcode@willingconsulting.com),
-[Carl Meyer](mailto:carl@oddbird.net), and
-[Mika Naylor](mailto:mail@autophagy.io).
+[Carl Meyer](mailto:carl@oddbird.net),
+[Mika Naylor](mailto:mail@autophagy.io), and
+[Zsolt Dollenstein](mailto:zsol.zsol@gmail.com).
 
 Multiple contributions by:
 * [Anthony Sottile](mailto:asottile@umich.edu)
@@ -579,5 +682,5 @@ Multiple contributions by:
 * [Eli Treuherz](mailto:eli.treuherz@cgi.com)
 * Hugo van Kemenade
 * [Ivan Katanić](mailto:ivan.katanic@gmail.com)
+* [Jonas Obrist](mailto:ojiidotch@gmail.com)
 * [Osaetin Daniel](mailto:osaetindaniel@gmail.com)
-* [Zsolt Dollenstein](mailto:zsol.zsol@gmail.com)