Start organizing platform-specific Python code

This starts to split platform-specific Python code into its own module,
which should help to tidy up our mach commands and make things more
reusable.

1 files changed, 64 insertions, 0 deletions

diff --git a/python/servo/platform/__init__.py b/python/servo/platform/__init__.py
new file mode 100644
index 00000000000..84968550d00
--- /dev/null
+++ b/python/servo/platform/__init__.py
@@ -0,0 +1,64 @@
+# Copyright 2023 The Servo Project Developers. See the COPYRIGHT
+# file at the top-level directory of this distribution.
+#
+# Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+# http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+# <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+# option. This file may not be copied, modified, or distributed
+# except according to those terms.
+
+import platform
+
+from .base import Base
+from .windows import Windows
+
+
+def host_platform():
+    os_type = platform.system().lower()
+    if os_type == "linux":
+        os_type = "unknown-linux-gnu"
+    elif os_type == "darwin":
+        os_type = "apple-darwin"
+    elif os_type == "android":
+        os_type = "linux-androideabi"
+    elif os_type == "windows":
+        os_type = "pc-windows-msvc"
+    elif os_type == "freebsd":
+        os_type = "unknown-freebsd"
+    else:
+        os_type = "unknown"
+    return os_type
+
+
+def host_triple():
+    os_type = host_platform()
+    cpu_type = platform.machine().lower()
+    if cpu_type in ["i386", "i486", "i686", "i768", "x86"]:
+        cpu_type = "i686"
+    elif cpu_type in ["x86_64", "x86-64", "x64", "amd64"]:
+        cpu_type = "x86_64"
+    elif cpu_type == "arm":
+        cpu_type = "arm"
+    elif cpu_type == "aarch64":
+        cpu_type = "aarch64"
+    else:
+        cpu_type = "unknown"
+    return f"{cpu_type}-{os_type}"
+
+
+def get():
+    # We import the concrete platforms in if-statements here, because
+    # each one might have platform-specific imports which might not
+    # resolve on all platforms.
+    # TODO(mrobinson): We should do this for Windows too, once we
+    # stop relying on platform-specific code outside of this module.
+    # pylint: disable=import-outside-toplevel
+    if "windows-msvc" in host_triple():
+        return Windows()
+    if "linux-gnu" in host_triple():
+        from .linux import Linux
+        return Linux()
+    if "apple-darwin" in host_triple():
+        from .macos import MacOS
+        return MacOS()
+    return Base()