Meta: Support Swift_Release preset in ladybird.py

Author: https://github.com/ADKaster
Commit: ab661467e7
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/5047

Meta/find_compiler.py

@@ -168,6 +168,32 @@ def pick_host_compiler(platform: Platform, cc: str, cxx: str) -> tuple[str, str]
     sys.exit(1)
 
 
+def pick_swift_compilers(platform: Platform, project_root: Path) -> tuple[Path, Path, Path]:
+    if platform.host_system == HostSystem.Windows:
+        print("Swift builds are not supported on Windows", file=sys.stderr)
+        sys.exit(1)
+
+    if not shutil.which("swiftly"):
+        print("swiftly is required to manage Swift toolchains", file=sys.stderr)
+        sys.exit(1)
+
+    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
+        )
+
+    swiftly_toolchain_path = Path(swiftly_toolchain_path.strip())
+    swiftly_bin_dir = swiftly_toolchain_path.joinpath("usr", "bin")
+
+    if not swiftly_toolchain_path.exists() or not swiftly_bin_dir.exists():
+        print(f"swiftly toolchain path {swiftly_toolchain_path} does not exist", file=sys.stderr)
+        sys.exit(1)
+
+    return swiftly_bin_dir / "clang", swiftly_bin_dir / "clang++", swiftly_bin_dir / "swiftc"
+
+
 def main():
     platform = Platform()
     (default_cc, default_cxx) = platform.default_compiler()

Meta/ladybird.py

@@ -18,6 +18,7 @@ from typing import Optional
 sys.path.append(str(Path(__file__).resolve().parent.parent))
 
 from Meta.find_compiler import pick_host_compiler
+from Meta.find_compiler import pick_swift_compilers
 from Meta.host_platform import HostArchitecture
 from Meta.host_platform import HostSystem
 from Meta.host_platform import Platform
@@ -183,6 +184,9 @@ def configure_main(platform: Platform, preset: str, cc: str, cxx: str) -> Path:
         return build_preset_dir
 
     validate_cmake_version()
+    if "Swift" in preset:
+        (cc, cxx, swiftc) = pick_swift_compilers(platform, ladybird_source_dir)
+    else:
         (cc, cxx) = pick_host_compiler(platform, cc, cxx)
 
     config_args = [
@@ -197,6 +201,9 @@ def configure_main(platform: Platform, preset: str, cc: str, cxx: str) -> Path:
         f"-DCMAKE_CXX_COMPILER={cxx}",
     ]
 
+    if "Swift" in preset:
+        config_args.append(f"-DCMAKE_Swift_COMPILER={swiftc}")
+
     if platform.host_system == HostSystem.Linux and platform.host_architecture == HostArchitecture.AArch64:
         config_args.extend(configure_skia_jemalloc())
 
@@ -251,6 +258,7 @@ def configure_build_env(preset: str) -> tuple[Path, Path]:
         "Distribution": build_root_dir / "distribution",
         "Release": build_root_dir / "release",
         "Sanitizer": build_root_dir / "sanitizers",
+        "Swift_Release": build_root_dir / "swift",
         "Windows_CI": build_root_dir / "release",
         "Windows_Experimental": build_root_dir / "debug",
     }