feat: option to build directly with uv (#2322)

* feat: option to build directly with uv

Signed-off-by: Henry Schreiner <henryschreineriii@gmail.com>

tests: add uv to tests

Signed-off-by: Henry Schreiner <henryschreineriii@gmail.com>

fix: uv doesn't pick special Pythons at the top of the path

Signed-off-by: Henry Schreiner <henryschreineriii@gmail.com>

fix: set uv build constraints too

Signed-off-by: Henry Schreiner <henryschreineriii@gmail.com>

fix: uv doesn't support PyPy 3.8

Signed-off-by: Henry Schreiner <henryschreineriii@gmail.com>

tests: add pyproject.toml for failing test

Signed-off-by: Henry Schreiner <henryschreineriii@gmail.com>

Revert "tests: add pyproject.toml for failing test"

This reverts commit 619bde368a67dfdd8f02dc33a1525c27bc8cbe91.

tests: skip uv output test

Signed-off-by: Henry Schreiner <henryschreineriii@gmail.com>

* tests: uv was in the wrong fixture

Signed-off-by: Henry Schreiner <henryfs@princeton.edu>

* fix: from @trim21

Signed-off-by: Henry Schreiner <henryfs@princeton.edu>

* tests: improve skipping

Signed-off-by: Henry Schreiner <henryfs@princeton.edu>

* fix: some fixes from copilot review

Signed-off-by: Henry Schreiner <henryfs@princeton.edu>

---------

Signed-off-by: Henry Schreiner <henryschreineriii@gmail.com>
Signed-off-by: Henry Schreiner <henryfs@princeton.edu>

bin/generate_schema.py

@@ -57,21 +57,23 @@ properties:
     type: string_array
   build-frontend:
     default: default
-    description: Set the tool to use to build, either "build" (default), "build[uv]", or "pip"
+    description: Set the tool to use to build, either "build" (default), "build[uv]", "uv", or "pip"
     oneOf:
-      - enum: [pip, build, "build[uv]", default]
+      - enum: [pip, build, "build[uv]", uv, default]
       - type: string
         pattern: '^pip; ?args:'
       - type: string
         pattern: '^build; ?args:'
       - type: string
         pattern: '^build\\[uv\\]; ?args:'
+      - type: string
+        pattern: '^uv; ?args:'
       - type: object
         additionalProperties: false
         required: [name]
         properties:
           name:
-            enum: [pip, build, "build[uv]"]
+            enum: [pip, build, "build[uv]", uv]
           args:
             type: array
             items: