Use uv for envs, particularly the requirements env.

Faster, etc.

Author: Julian

noxfile.py

@@ -20,6 +20,7 @@
 SUPPORTED = ["3.8", "3.9", "3.10", "pypy3.10", "3.11", "3.12"]
 LATEST = SUPPORTED[-1]
 
+nox.options.default_venv_backend = "uv|virtualenv"
 nox.options.sessions = []
 
 
@@ -162,13 +163,11 @@ def requirements(session):
 
     You should commit the result afterwards.
     """
-    session.install("pip-tools")
+    if session.venv_backend == "uv":
+        cmd = ["uv", "pip", "compile"]
+    else:
+        session.install("pip-tools")
+        cmd = ["pip-compile", "--resolver", "backtracking", "--strip-extras"]
+
     for each in REQUIREMENTS_IN:
-        session.run(
-            "pip-compile",
-            "--resolver",
-            "backtracking",
-            "--strip-extras",
-            "-U",
-            each.relative_to(ROOT),
-        )
+        session.run(*cmd, "-U", each.relative_to(ROOT))