Meta: Resolve pyright warnings in ladybird.py and helpers

Author: https://github.com/trflynn89
Commit: 11f4b9c6ae
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/5755

Meta/find_compiler.py

@@ -180,9 +180,11 @@ def pick_swift_compilers(platform: Platform, project_root: Path) -> tuple[Path,
     swiftly_toolchain_path = run_command(["swiftly", "use", "--print-location"], return_output=True, cwd=project_root)
     if not swiftly_toolchain_path:
         run_command(["swiftly", "install"], exit_on_failure=True, cwd=project_root)
+
         swiftly_toolchain_path = run_command(
             ["swiftly", "use", "--print-location"], return_output=True, exit_on_failure=True, cwd=project_root
         )
+        assert swiftly_toolchain_path
 
     swiftly_toolchain_path = Path(swiftly_toolchain_path.strip())
     swiftly_bin_dir = swiftly_toolchain_path.joinpath("usr", "bin")

Meta/ladybird.py

@@ -183,9 +183,12 @@ def configure_main(platform: Platform, preset: str, cc: str, cxx: str) -> Path:
     if build_preset_dir.joinpath("build.ninja").exists() or build_preset_dir.joinpath("ladybird.sln").exists():
         return build_preset_dir
 
+    switfc: Optional[str] = None
     validate_cmake_version()
+
     if "Swift" in preset:
-        (cc, cxx, swiftc) = pick_swift_compilers(platform, ladybird_source_dir)
+        compilers = pick_swift_compilers(platform, ladybird_source_dir)
+        (cc, cxx, swiftc) = tuple(map(str, compilers))
     else:
         (cc, cxx) = pick_host_compiler(platform, cc, cxx)
 
@@ -201,7 +204,7 @@ def configure_main(platform: Platform, preset: str, cc: str, cxx: str) -> Path:
         f"-DCMAKE_CXX_COMPILER={cxx}",
     ]
 
-    if "Swift" in preset:
+    if switfc:
         config_args.append(f"-DCMAKE_Swift_COMPILER={swiftc}")
 
     if platform.host_system == HostSystem.Linux and platform.host_architecture == HostArchitecture.AArch64: