feat(build): graduate Rust cargo-lambda support from experimental

Remove the experimental/beta flag requirement for building Rust functions
with the rust-cargolambda build method. Users no longer need to pass
--beta-features or set SAM_CLI_BETA_RUST_CARGO_LAMBDA=1 to build Rust
Lambda functions.

Changes:
- Remove RustCargoLambda from ExperimentalFlag class
- Remove _check_rust_cargo_experimental_flag() method from BuildContext
- Update integration tests to not require beta_features flag
- Update unit tests to remove mock for deleted method

Author: bnusunny

samcli/commands/_utils/experimental.py

@@ -54,7 +54,6 @@ class ExperimentalFlag:
             "experimentalTerraformSupport", EXPERIMENTAL_ENV_VAR_PREFIX + "TERRAFORM_SUPPORT"
         )
     }
-    RustCargoLambda = ExperimentalEntry("experimentalCargoLambda", EXPERIMENTAL_ENV_VAR_PREFIX + "RUST_CARGO_LAMBDA")
 
 
 def is_experimental_enabled(config_entry: ExperimentalEntry) -> bool:

samcli/commands/build/build_context.py

@@ -11,7 +11,6 @@
 import click
 
 from samcli.commands._utils.constants import DEFAULT_BUILD_DIR
-from samcli.commands._utils.experimental import ExperimentalFlag, prompt_experimental
 from samcli.commands._utils.template import (
     get_template_data,
     move_template,
@@ -281,7 +280,6 @@ def run(self) -> None:
             )
 
             self._check_exclude_warning()
-            self._check_rust_cargo_experimental_flag()
 
             for f in self.get_resources_to_build().functions:
                 EventTracker.track_event(EventName.BUILD_FUNCTION_RUNTIME.value, f.runtime)
@@ -696,25 +694,6 @@ 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:
-        """
-        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".'
-        )
-        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 is_building_rust:
-            prompt_experimental(ExperimentalFlag.RustCargoLambda, WARNING_MESSAGE)
-
     @property
     def build_in_source(self) -> Optional[bool]:
         return self._build_in_source

tests/integration/buildcmd/build_integ_base.py

@@ -1141,7 +1141,7 @@ def _test_with_rust_cargo_lambda(
         overrides = self.get_override(runtime, code_uri, architecture, handler)
         if binary:
             overrides["Binary"] = binary
-        cmdlist = self.get_command_list(use_container=use_container, parameter_overrides=overrides, beta_features=True)
+        cmdlist = self.get_command_list(use_container=use_container, parameter_overrides=overrides)
 
         newenv = os.environ.copy()
         if build_mode:

tests/unit/commands/buildcmd/test_build_context.py

@@ -1254,14 +1254,12 @@ 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.lib.build.app_builder.ApplicationBuilder.build")
     @patch("samcli.lib.telemetry.event.EventTracker.track_event")
     def test_build_in_source_event_sent(
         self,
         mock_track_event,
         mock_builder,
-        mock_rust,
         mock_warning,
         mock_get_resources,
         mock_is_sam_template,