build: Add a TypedDict for BuildTarget keyword arguments

This has the "processed" keyword arguments that the interpreter is
supposed to create for us, or that we expect internal users to build by
build.

This requires some hacking around in the rust module for the moment
because we suddenly have a type.

1 files changed, 8 insertions, 9 deletions

diff --git a/mesonbuild/modules/rust.py b/mesonbuild/modules/rust.py
index 2c56a860e..c8b5d7482 100644
--- a/mesonbuild/modules/rust.py
+++ b/mesonbuild/modules/rust.py
@@ -26,7 +26,7 @@ from ..programs import ExternalProgram, NonExistingExternalProgram
 
 if T.TYPE_CHECKING:
     from . import ModuleState
-    from ..build import IncludeDirs, LibTypes
+    from ..build import BuildTargetTypes, IncludeDirs, LibTypes
     from ..compilers.rust import RustCompiler
     from ..dependencies import Dependency, ExternalLibrary
     from ..interpreter import Interpreter
@@ -44,7 +44,7 @@ if T.TYPE_CHECKING:
         dependencies: T.List[T.Union[Dependency, ExternalLibrary]]
         is_parallel: bool
         link_with: T.List[LibTypes]
-        link_whole: T.List[LibTypes]
+        link_whole: T.List[T.Union[StaticLibrary, CustomTarget, CustomTargetIndex]]
         rust_args: T.List[str]
 
     FuncTest = FuncRustTest[_kwargs.TestArgs]
@@ -179,16 +179,15 @@ class RustModule(ExtensionModule):
         tkwargs['protocol'] = 'rust'
 
         new_target_kwargs = base_target.original_kwargs.copy()
-        # Don't mutate the shallow copied list, instead replace it with a new
-        # one
+        del new_target_kwargs['rust_crate_type']
+        for kw in ('pic', 'prelink', 'rust_abi', 'version', 'soversion', 'darwin_versions'):
+            if kw in new_target_kwargs:
+                del new_target_kwargs[kw]  # type: ignore[misc]
+
         new_target_kwargs['install'] = False
         new_target_kwargs['dependencies'] = new_target_kwargs.get('dependencies', []) + kwargs['dependencies']
-        new_target_kwargs['link_with'] = new_target_kwargs.get('link_with', []) + kwargs['link_with']
+        new_target_kwargs['link_with'] = new_target_kwargs.get('link_with', []) + T.cast('T.List[BuildTargetTypes]', kwargs['link_with'])
         new_target_kwargs['link_whole'] = new_target_kwargs.get('link_whole', []) + kwargs['link_whole']
-        del new_target_kwargs['rust_crate_type']
-        for kw in ['pic', 'prelink', 'rust_abi', 'version', 'soversion', 'darwin_versions']:
-            if kw in new_target_kwargs:
-                del new_target_kwargs[kw]
 
         lang_args = base_target.extra_args.copy()
         lang_args['rust'] = base_target.extra_args['rust'] + kwargs['rust_args'] + ['--test']