From ab661467e7a74e202428dc0f24e147f6101853d7 Mon Sep 17 00:00:00 2001
From: Andrew Kaster <andrew@ladybird.org>
Date: Mon, 9 Jun 2025 18:32:00 -0600
Subject: [PATCH] Meta: Support Swift_Release preset in ladybird.py

---
 Meta/find_compiler.py | 26 ++++++++++++++++++++++++++
 Meta/ladybird.py      | 10 +++++++++-
 2 files changed, 35 insertions(+), 1 deletion(-)

diff --git a/Meta/find_compiler.py b/Meta/find_compiler.py
index 104edb18ad5..e2814934ac3 100755
--- a/Meta/find_compiler.py
+++ b/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()
diff --git a/Meta/ladybird.py b/Meta/ladybird.py
index 3e086de90fd..86a55050ed0 100755
--- a/Meta/ladybird.py
+++ b/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
@@ -183,7 +184,10 @@ def configure_main(platform: Platform, preset: str, cc: str, cxx: str) -> Path:
         return build_preset_dir
 
     validate_cmake_version()
-    (cc, cxx) = pick_host_compiler(platform, cc, cxx)
+    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 = [
         "cmake",
@@ -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",
     }