feat: add experimental uv support

samcli/commands/_utils/experimental.py

@@ -55,6 +55,9 @@ class ExperimentalFlag:
         )
     }
     RustCargoLambda = ExperimentalEntry("experimentalCargoLambda", EXPERIMENTAL_ENV_VAR_PREFIX + "RUST_CARGO_LAMBDA")
+    UvPackageManager = ExperimentalEntry(
+        "experimentalUvPackageManager", EXPERIMENTAL_ENV_VAR_PREFIX + "UV_PACKAGE_MANAGER"
+    )
 
 
 def is_experimental_enabled(config_entry: ExperimentalEntry) -> bool:

samcli/commands/build/build_context.py

@@ -281,7 +281,7 @@ def run(self) -> None:
             )
 
             self._check_exclude_warning()
-            self._check_rust_cargo_experimental_flag()
+            self._check_build_method_experimental_flag()
 
             for f in self.get_resources_to_build().functions:
                 EventTracker.track_event(EventName.BUILD_FUNCTION_RUNTIME.value, f.runtime)
@@ -696,24 +696,26 @@ 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) -> 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"
-            'You can also enable this beta feature with "sam build --beta-features".'
-        )
+        EXPERIMENTAL_BUILD_METHODS = {
+            "rust-cargolambda": ExperimentalFlag.RustCargoLambda,
+            "python-uv": ExperimentalFlag.UvPackageManager,
+        }
+
         resources_to_build = self.get_resources_to_build()
-        is_building_rust = False
         for function in resources_to_build.functions:
-            if function.metadata and function.metadata.get("BuildMethod", "") == "rust-cargolambda":
-                is_building_rust = True
-                break
+            if function.metadata and function.metadata.get("BuildMethod", "") in EXPERIMENTAL_BUILD_METHODS:
+                build_method = function.metadata.get("BuildMethod", "")
+                WARNING_MESSAGE = (
+                    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".'
+                )
 
-        if is_building_rust:
-            prompt_experimental(ExperimentalFlag.RustCargoLambda, WARNING_MESSAGE)
+                prompt_experimental(EXPERIMENTAL_BUILD_METHODS[build_method], WARNING_MESSAGE)
 
     @property
     def build_in_source(self) -> Optional[bool]:

samcli/lib/build/workflow_config.py

@@ -17,6 +17,7 @@
     NODEJS_NPM_ESBUILD_CONFIG,
     PROVIDED_MAKE_CONFIG,
     PYTHON_PIP_CONFIG,
+    PYTHON_UV_CONFIG,
     RUBY_BUNDLER_CONFIG,
     RUST_CARGO_LAMBDA_CONFIG,
 )
@@ -155,6 +156,7 @@ 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),
     }
 
     selectors_by_runtime = {

samcli/lib/build/workflows.py

@@ -24,6 +24,15 @@
     must_mount_with_write_in_container=False,
 )
 
+PYTHON_UV_CONFIG = CONFIG(
+    language="python",
+    dependency_manager="uv",
+    application_framework=None,
+    manifest_name="pyproject.toml",
+    executable_search_paths=None,
+    must_mount_with_write_in_container=False,
+)
+
 NODEJS_NPM_CONFIG = CONFIG(
     language="nodejs",
     dependency_manager="npm",
@@ -117,6 +126,7 @@
 
 ALL_CONFIGS: List[CONFIG] = [
     PYTHON_PIP_CONFIG,
+    PYTHON_UV_CONFIG,
     NODEJS_NPM_CONFIG,
     RUBY_BUNDLER_CONFIG,
     JAVA_GRADLE_CONFIG,

schema/samcli.json

@@ -2202,11 +2202,12 @@
                   "title": "parameter_overrides",
                   "type": [
                     "array",
+                    "object",
                     "string"
                   ],
                   "description": "String that contains AWS CloudFormation parameter overrides encoded as key=value pairs.",
                   "items": {
-                    "type": "string"
+                    "$ref": "#/$defs/parameter_overrides_items"
                   }
                 },
                 "stack_name": {
@@ -2271,18 +2272,6 @@
               "description": "Available parameters for the list stack outputs command:\n* stack_name:\nName of corresponding deployed stack.\n* output:\nOutput the results from the command in a given output format (json or table).\n* profile:\nSelect a specific profile from your credential file to get AWS credentials.\n* region:\nSet the AWS Region of the service. (e.g. us-east-1)\n* beta_features:\nEnable/Disable beta features.\n* debug:\nTurn on debug logging to print debug message generated by AWS SAM CLI and display timestamps.\n* save_params:\nSave the parameters provided via the command line to the configuration file.",
               "type": "object",
               "properties": {
-                "parameter_overrides": {
-                  "title": "parameter_overrides",
-                  "type": [
-                    "array",
-                    "object",
-                    "string"
-                  ],
-                  "description": "String that contains AWS CloudFormation parameter overrides encoded as key=value pairs.",
-                  "items": {
-                    "$ref": "#/$defs/parameter_overrides_items"
-                  }
-                },
                 "stack_name": {
                   "title": "stack_name",
                   "type": "string",

tests/unit/commands/_utils/test_experimental.py

@@ -57,16 +57,16 @@ def test_set_experimental(self):
         self.gc_mock.return_value.set_value.assert_called_once_with(config_entry, False, is_flag=True, flush=False)
 
     def test_get_all_experimental(self):
-        self.assertEqual(len(get_all_experimental()), 5)
+        self.assertEqual(len(get_all_experimental()), 6)
 
     def test_get_all_experimental_statues(self):
-        self.assertEqual(len(get_all_experimental_statues()), 5)
+        self.assertEqual(len(get_all_experimental_statues()), 6)
 
     def test_get_all_experimental_env_vars(self):
-        self.assertEqual(len(get_all_experimental_env_vars()), 5)
+        self.assertEqual(len(get_all_experimental_env_vars()), 6)
 
     def test_get_enabled_experimental_flags(self):
-        self.assertEqual(len(get_enabled_experimental_flags()), 5)
+        self.assertEqual(len(get_enabled_experimental_flags()), 6)
 
     @patch("samcli.commands._utils.experimental.set_experimental")
     @patch("samcli.commands._utils.experimental.get_all_experimental")

tests/unit/commands/buildcmd/test_build_context.py

@@ -1254,7 +1254,7 @@ def test_must_catch_function_not_found_exception(
     @patch("samcli.commands.build.build_context.BuildContext._is_sam_template")
     @patch("samcli.commands.build.build_context.BuildContext.get_resources_to_build")
     @patch("samcli.commands.build.build_context.BuildContext._check_exclude_warning")
-    @patch("samcli.commands.build.build_context.BuildContext._check_rust_cargo_experimental_flag")
+    @patch("samcli.commands.build.build_context.BuildContext._check_build_method_experimental_flag")
     @patch("samcli.lib.build.app_builder.ApplicationBuilder.build")
     @patch("samcli.lib.telemetry.event.EventTracker.track_event")
     def test_build_in_source_event_sent(