feat: make uv accessible by BuildMethod template parameter

Author: reedham-aws

samcli/commands/build/build_context.py

@@ -281,7 +281,8 @@ def run(self) -> None:
             )
 
             self._check_exclude_warning()
-            self._check_rust_cargo_experimental_flag()
+            self._check_build_method_experimental_flag('rust-cargolambda')
+            self._check_build_method_experimental_flag('python-uv')
 
             for f in self.get_resources_to_build().functions:
                 EventTracker.track_event(EventName.BUILD_FUNCTION_RUNTIME.value, f.runtime)
@@ -696,24 +697,24 @@ def _check_exclude_warning(self) -> None:
         if self._resource_identifier in excludes:
             LOG.warning(self._EXCLUDE_WARNING_MESSAGE)
 
-    def _check_rust_cargo_experimental_flag(self) -> None:
+    def _check_build_method_experimental_flag(self, build_method: str) -> None:
         """
         Prints warning message and confirms if user wants to use beta feature
         """
         WARNING_MESSAGE = (
-            'Build method "rust-cargolambda" is a beta feature.\n'
-            "Please confirm if you would like to proceed\n"
+            f'Build method "{build_method}" is a beta feature.\n'
+            'Please confirm if you would like to proceed\n'
             'You can also enable this beta feature with "sam build --beta-features".'
         )
         resources_to_build = self.get_resources_to_build()
-        is_building_rust = False
+        is_building_experimental = False
         for function in resources_to_build.functions:
-            if function.metadata and function.metadata.get("BuildMethod", "") == "rust-cargolambda":
-                is_building_rust = True
+            if function.metadata and function.metadata.get("BuildMethod", "") == build_method:
+                is_building_experimental = True
                 break
 
-        if is_building_rust:
-            prompt_experimental(ExperimentalFlag.RustCargoLambda, WARNING_MESSAGE)
+        if is_building_experimental:
+            prompt_experimental(ExperimentalFlag.RustCargoLambda if build_method == "rust-cargolambda" else ExperimentalFlag.UvPackageManager, WARNING_MESSAGE)
 
     @property
     def build_in_source(self) -> Optional[bool]:

samcli/lib/build/workflow_config.py

@@ -157,28 +157,17 @@ def get_workflow_config(
         "dotnet7": BasicWorkflowSelector(DOTNET_CLIPACKAGE_CONFIG),
         "dotnet": BasicWorkflowSelector(DOTNET_CLIPACKAGE_CONFIG),
         "rust-cargolambda": BasicWorkflowSelector(RUST_CARGO_LAMBDA_CONFIG),
+        "python-uv": BasicWorkflowSelector(PYTHON_UV_CONFIG),
     }
 
-    use_uv = is_experimental_enabled(ExperimentalFlag.UvPackageManager)
-
     selectors_by_runtime = {
         "python3.8": BasicWorkflowSelector([PYTHON_PIP_CONFIG]),
         "python3.9": BasicWorkflowSelector([PYTHON_PIP_CONFIG]),
-        "python3.10": ConditionalWorkflowSelector(
-            default=PYTHON_PIP_CONFIG, alternative=PYTHON_UV_CONFIG, use_alternative=use_uv
-        ),
-        "python3.11": ConditionalWorkflowSelector(
-            default=PYTHON_PIP_CONFIG, alternative=PYTHON_UV_CONFIG, use_alternative=use_uv
-        ),
-        "python3.12": ConditionalWorkflowSelector(
-            default=PYTHON_PIP_CONFIG, alternative=PYTHON_UV_CONFIG, use_alternative=use_uv
-        ),
-        "python3.13": ConditionalWorkflowSelector(
-            default=PYTHON_PIP_CONFIG, alternative=PYTHON_UV_CONFIG, use_alternative=use_uv
-        ),
-        "python3.14": ConditionalWorkflowSelector(
-            default=PYTHON_PIP_CONFIG, alternative=PYTHON_UV_CONFIG, use_alternative=use_uv
-        ),
+        "python3.10": BasicWorkflowSelector([PYTHON_PIP_CONFIG]),
+        "python3.11": BasicWorkflowSelector([PYTHON_PIP_CONFIG]),
+        "python3.12": BasicWorkflowSelector([PYTHON_PIP_CONFIG]),
+        "python3.13": BasicWorkflowSelector([PYTHON_PIP_CONFIG]),
+        "python3.14": BasicWorkflowSelector([PYTHON_PIP_CONFIG]),
         "nodejs16.x": BasicWorkflowSelector(NODEJS_NPM_CONFIG),
         "nodejs18.x": BasicWorkflowSelector(NODEJS_NPM_CONFIG),
         "nodejs20.x": BasicWorkflowSelector(NODEJS_NPM_CONFIG),