interpreter: use typed_kwargs for shared_library(version)

mesonbuild/build.py

@@ -2139,7 +2139,7 @@ class SharedLibrary(BuildTarget):
             compilers: T.Dict[str, 'Compiler'],
             kwargs):
         self.soversion = None
-        self.ltversion = None
+        self.ltversion: T.Optional[str] = None
         # Max length 2, first element is compatibility_version, second is current_version
         self.darwin_versions = []
         self.vs_module_defs = None
@@ -2350,12 +2350,7 @@ class SharedLibrary(BuildTarget):
 
         if not self.environment.machines[self.for_machine].is_android():
             # Shared library version
-            if 'version' in kwargs:
-                self.ltversion = kwargs['version']
-                if not isinstance(self.ltversion, str):
-                    raise InvalidArguments('Shared library version needs to be a string, not ' + type(self.ltversion).__name__)
-                if not re.fullmatch(r'[0-9]+(\.[0-9]+){0,2}', self.ltversion):
-                    raise InvalidArguments(f'Invalid Shared library version "{self.ltversion}". Must be of the form X.Y.Z where all three are numbers. Y and Z are optional.')
+            self.ltversion = T.cast('T.Optional[str]', kwargs.get('version'))
             # Try to extract/deduce the soversion
             if 'soversion' in kwargs:
                 self.soversion = kwargs['soversion']

mesonbuild/interpreter/kwargs.py

@@ -338,7 +338,12 @@ class StaticLibrary(_BuildTarget):
     pass
 
 
-class SharedLibrary(_BuildTarget):
+class _SharedLibMixin(TypedDict):
+
+    version: T.Optional[str]
+
+
+class SharedLibrary(_BuildTarget, _SharedLibMixin):
     pass
 
 
@@ -346,7 +351,7 @@ class SharedModule(_BuildTarget):
     pass
 
 
-class Library(_BuildTarget):
+class Library(_BuildTarget, _SharedLibMixin):
 
     """For library, both_library, and as a base for build_target"""
 

mesonbuild/interpreter/type_checking.py

@@ -119,6 +119,13 @@ def _lower_strlist(input: T.List[str]) -> T.List[str]:
     return [i.lower() for i in input]
 
 
+def _validate_shlib_version(val: T.Optional[str]) -> T.Optional[str]:
+    if val is not None and not re.fullmatch(r'[0-9]+(\.[0-9]+){0,2}', val):
+        return (f'Invalid Shared library version "{val}". '
+                'Must be of the form X.Y.Z where all three are numbers. Y and Z are optional.')
+    return None
+
+
 def variables_validator(contents: T.Union[str, T.List[str], T.Dict[str, str]]) -> T.Optional[str]:
     if isinstance(contents, str):
         contents = [contents]
@@ -527,7 +534,9 @@ STATIC_LIB_KWS = [
 
 # Arguments exclusive to SharedLibrary. These are separated to make integrating
 # them into build_target easier
-_EXCLUSIVE_SHARED_LIB_KWS: T.List[KwargInfo] = []
+_EXCLUSIVE_SHARED_LIB_KWS: T.List[KwargInfo] = [
+    KwargInfo('version', (str, NoneType), validator=_validate_shlib_version)
+]
 
 # The total list of arguments used by SharedLibrary
 SHARED_LIB_KWS = [