📦 Add a stable extra for pip upper bound

It is supposed to correspond to the range of what's tested in our CI.

Co-Authored-By: Jimmy Merrild Krag <[email protected]>
Co-Authored-By: Stephen Rosen <[email protected]>

Author: 3 people

README.md

@@ -22,7 +22,7 @@ Similar to `pip`, `pip-tools` must be installed in each of your project's
 
 ```console
 $ source /path/to/venv/bin/activate
-(venv) $ python -m pip install pip-tools
+(venv) $ python -m pip install 'pip-tools [supported]'
 ```
 
 **Note**: all of the remaining example commands assume you've activated your

pyproject.toml

@@ -55,6 +55,9 @@ repository = "https://github.com/jazzband/pip-tools"
 changelog = "https://github.com/jazzband/pip-tools/releases"
 
 [project.optional-dependencies]
+stable = [
+  "pip <= 25.3",
+]
 testing = [
   "pytest >= 7.2.0",
   "pytest-rerunfailures",

tox.ini

@@ -11,6 +11,8 @@ skip_missing_interpreters = True
 [testenv]
 description = run the tests with pytest
 extras =
+    pipsupported: stable
+    piplowest: stable
     testing
     coverage: coverage
 deps =