Add ruff-isort formatter (#279)

`ruff` doesn't run isort as part of its format, so to maintain parity
with the sort rules that black/isort offer, this is the ruff isort.

---------

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

CHANGELOG.md

@@ -25,6 +25,7 @@ The format is based on [Keep a Changelog].
   for JSON ([#257]).
 * [`robotidy`](https://robotidy.readthedocs.io) for Robot Framework files
   ([#263]).
+* [`ruff-isort`](https://github.com/astral-sh/ruff) for [Python](https://python.org) imports using ruff ([#279]).
 * [denofmt](https://docs.deno.com/runtime/manual/tools/formatter) for
   js, jsx, ts, tsx, json, jsonc, md files. ([#264])
 * [docformatter](https://github.com/PyCQA/docformatter) for Python docstrings ([#267])
@@ -51,6 +52,7 @@ The format is based on [Keep a Changelog].
 [#271]: https://github.com/radian-software/apheleia/pull/271
 [#274]: https://github.com/radian-software/apheleia/issues/274
 [#275]: https://github.com/radian-software/apheleia/pull/275
+[#279]: https://github.com/radian-software/apheleia/pull/279
 
 ## 4.0 (released 2023-11-23)
 ### Breaking changes

apheleia-formatters.el

@@ -167,6 +167,12 @@
              (apheleia-formatters-fill-column "--line-length")
              "--stdin-filename" filepath
              "-"))
+    (ruff-isort . ("ruff" "check"
+                   "-n"
+                   "--select" "I"
+                   "--fix" "--fix-only"
+                   "--stdin-filename" filepath
+                   "-"))
     (shfmt . ("shfmt"
               "-filename" filepath
               "-ln" (cl-case (bound-and-true-p sh-shell)

test/formatters/installers/ruff-isort.bash

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

test/formatters/samplecode/ruff-isort/in.py

@@ -0,0 +1,20 @@
+from my_lib import Object
+
+import os
+
+from my_lib import Object3
+
+from my_lib import Object2
+
+import sys
+
+from third_party import lib15, lib1, lib2, lib3, lib4, lib5, lib6, lib7, lib8, lib9, lib10, lib11, lib12, lib13, lib14
+
+import sys
+
+from __future__ import absolute_import
+
+from third_party import lib3
+
+print("Hey")
+print("yo")

test/formatters/samplecode/ruff-isort/out.py

@@ -0,0 +1,26 @@
+from __future__ import absolute_import
+
+import os
+import sys
+
+from my_lib import Object, Object2, Object3
+from third_party import (
+    lib1,
+    lib2,
+    lib3,
+    lib4,
+    lib5,
+    lib6,
+    lib7,
+    lib8,
+    lib9,
+    lib10,
+    lib11,
+    lib12,
+    lib13,
+    lib14,
+    lib15,
+)
+
+print("Hey")
+print("yo")