wrap: Small simplification

mesonbuild/wrap/wrap.py

@@ -368,18 +368,17 @@ class Resolver:
             self.dirname = self.wrap.filename
         rel_path = os.path.relpath(self.dirname, self.source_dir)
 
-        meson_file = os.path.join(self.dirname, 'meson.build')
-        cmake_file = os.path.join(self.dirname, 'CMakeLists.txt')
-
-        if method not in ['meson', 'cmake']:
+        if method == 'meson':
+            buildfile = os.path.join(self.dirname, 'meson.build')
+        elif method == 'cmake':
+            buildfile = os.path.join(self.dirname, 'CMakeLists.txt')
+        else:
             raise WrapException('Only the methods "meson" and "cmake" are supported')
 
         # The directory is there and has meson.build? Great, use it.
-        if method == 'meson' and os.path.exists(meson_file):
+        if os.path.exists(buildfile):
             self.validate()
             return rel_path
-        if method == 'cmake' and os.path.exists(cmake_file):
-            return rel_path
 
         # Check if the subproject is a git submodule
         self.resolve_git_submodule()
@@ -408,10 +407,8 @@ class Resolver:
                 raise
 
         # A meson.build or CMakeLists.txt file is required in the directory
-        if method == 'meson' and not os.path.exists(meson_file):
-            raise WrapException('Subproject exists but has no meson.build file')
-        if method == 'cmake' and not os.path.exists(cmake_file):
-            raise WrapException('Subproject exists but has no CMakeLists.txt file')
+        if not os.path.exists(buildfile):
+            raise WrapException(f'Subproject exists but has no {os.path.basename(buildfile)} file')
 
         # At this point, the subproject has been successfully resolved for the
         # first time so save off the hash of the entire wrap file for future