Add support for the ruff python formatter (#236)

This adds support, but does not make it the default
Fixes: #233

---------

Co-authored-by: Radon Rosborough <radon@intuitiveexplanations.com>

CHANGELOG.md

@@ -69,6 +69,8 @@ The format is based on [Keep a Changelog].
 * [`rubocop`](https://github.com/rubocop/rubocop) for [ruby](https://www.ruby-lang.org/en/) ([#176]).
 * [`ruby-standard`](https://github.com/standardrb/standard) for
   [ruby](https://www.ruby-lang.org/en/) ([#201])
+* [`ruff`](https://github.com/astral-sh/ruff) for 
+  [python](https://python.org) ([#236])
 * [`rufo`](https://github.com/ruby-formatter/rufo) for
   [Ruby](https://www.ruby-lang.org/en/) ([#177]).
 * [`yapf`](https://github.com/google/yapf) for [Python](https://www.python.org/) ([#196])
@@ -94,6 +96,7 @@ The format is based on [Keep a Changelog].
 [#215]: https://github.com/radian-software/apheleia/pull/215
 [#223]: https://github.com/radian-software/apheleia/pull/223
 [#231]: https://github.com/radian-software/apheleia/pull/231
+[#236]: https://github.com/radian-software/apheleia/pull/236
 
 ## 3.2 (released 2023-02-25)
 ### Features

apheleia-formatters.el

@@ -121,6 +121,11 @@
                 "--stderr" "--format" "quiet" "--fail-level" "fatal"))
     (ruby-standard . ("standardrb" "--stdin" filepath "--fix" "--stderr"
                       "--format" "quiet" "--fail-level" "fatal"))
+    (ruff . ("ruff" "format"
+             "--silent"
+             (apheleia-formatters-fill-column "--line-length")
+             "--stdin-filename" filepath
+             "-"))
     (shfmt . ("shfmt"
               "-filename" filepath
               "-ln" (cl-case (bound-and-true-p sh-shell)

test/formatters/installers/ruff.bash

@@ -0,0 +1,2 @@
+apt-get install -y python3-pip
+pip install ruff

test/formatters/samplecode/ruff/in.py

@@ -0,0 +1,4 @@
+def     asdjf   ( l,
+        a):
+    3
+    +4

test/formatters/samplecode/ruff/out.py

@@ -0,0 +1,3 @@
+def asdjf(l, a):
+    3
+    +4