interpreter: Add type checking for BuildTarget(install_dir: )

This just puts the type checking in the frontend, there's still some
serious cleanup in the build and backend that need to happen.

2 files changed, 7 insertions, 0 deletions

diff --git a/mesonbuild/interpreter/kwargs.py b/mesonbuild/interpreter/kwargs.py
index 517ccee15..c08ceb759 100644
--- a/mesonbuild/interpreter/kwargs.py
+++ b/mesonbuild/interpreter/kwargs.py
@@ -367,6 +367,7 @@ class _BuildTarget(_BaseBuildTarget):
     d_import_dirs: T.List[T.Union[str, build.IncludeDirs]]
     d_module_versions: T.List[T.Union[str, int]]
     d_unittest: bool
+    install_dir: T.List[T.Union[str, bool]]
     rust_crate_type: T.Optional[Literal['bin', 'lib', 'rlib', 'dylib', 'cdylib', 'staticlib', 'proc-macro']]
     rust_dependency_map: T.Dict[str, str]
     swift_interoperability_mode: Literal['c', 'cpp']
diff --git a/mesonbuild/interpreter/type_checking.py b/mesonbuild/interpreter/type_checking.py
index 7d6b0073a..478924828 100644
--- a/mesonbuild/interpreter/type_checking.py
+++ b/mesonbuild/interpreter/type_checking.py
@@ -614,6 +614,12 @@ _ALL_TARGET_KWS: T.List[KwargInfo] = [
     ),
     INSTALL_MODE_KW,
     INSTALL_TAG_KW,
+    KwargInfo(
+        'install_dir',
+        ContainerTypeInfo(list, (str, bool)),
+        default=[],
+        listify=True,
+    ),
     KwargInfo('implicit_include_directories', bool, default=True, since='0.42.0'),
     NATIVE_KW,
     KwargInfo('resources', ContainerTypeInfo(list, str), default=[], listify=True),