android: add script in Android archive to create a SDK

Also,
- Move mingw's pkg-support into build-scripts
- Add type annotations to python scripts for mypy
- ci: use v4 tag of actions/cache
- cmake: use PYTHON3_EXECUTABLE for running xxd.py
  (Python3::Interpreter is not always recognized.)

build-scripts/pkg-support/android/__main__.py

@@ -0,0 +1,104 @@
+#!/usr/bin/env python
+
+"""
+Create a SDL SDK prefix from an Android archive
+This file is meant to be placed in a the root of an android .aar archive
+
+Example usage:
+```sh
+python SDL3-3.2.0.aar -o /usr/opt/android-sdks
+cmake -S my-project \
+    -DCMAKE_PREFIX_PATH=/usr/opt/android-sdks \
+    -DCMAKE_TOOLCHAIN_FILE=$ANDROID_NDK_HOME/build/cmake/android.toolchain.cmake \
+    -B build-arm64 -DANDROID_ABI=arm64-v8a \
+    -DCMAKE_BUILD_TYPE=Releaase
+cmake --build build-arm64
+```
+"""
+import argparse
+import io
+import json
+import os
+import pathlib
+import re
+import stat
+import zipfile
+
+
+AAR_PATH = pathlib.Path(__file__).resolve().parent
+ANDROID_ARCHS = { "armeabi-v7a", "arm64-v8a", "x86", "x86_64" }
+
+
+def main():
+    parser = argparse.ArgumentParser(
+        description="Convert an Android .aar archive into a SDK",
+        allow_abbrev=False,
+    )
+    parser.add_argument("-o", dest="output", type=pathlib.Path, required=True, help="Folder where to store the SDK")
+    args = parser.parse_args()
+
+    print(f"Creating a SDK at {args.output}...")
+
+    prefix = args.output
+    incdir = prefix / "include"
+    libdir = prefix / "lib"
+
+    RE_LIB_MODULE_ARCH = re.compile(r"prefab/modules/(?P<module>[A-Za-z0-9_-]+)/libs/android\.(?P<arch>[a-zA-Z0-9_-]+)/(?P<filename>lib[A-Za-z0-9_]+\.(?:so|a))")
+    RE_INC_MODULE_ARCH = re.compile(r"prefab/modules/(?P<module>[A-Za-z0-9_-]+)/include/(?P<header>[a-zA-Z0-9_./-]+)")
+    RE_LICENSE = re.compile(r"(?:.*/)?(?P<filename>(?:license|copying)(?:\.md|\.txt)?)", flags=re.I)
+    RE_PROGUARD = re.compile(r"(?:.*/)?(?P<filename>proguard.*\.(?:pro|txt))", flags=re.I)
+    RE_CMAKE = re.compile(r"(?:.*/)?(?P<filename>.*\.cmake)", flags=re.I)
+
+    with zipfile.ZipFile(AAR_PATH) as zf:
+        project_description = json.loads(zf.read("description.json"))
+        project_name = project_description["name"]
+        project_version = project_description["version"]
+        licensedir = prefix / "share/licenses" / project_name
+        cmakedir = libdir / "cmake" / project_name
+        javadir = prefix / "share/java" / project_name
+        javadocdir = prefix / "share/javadoc" / project_name
+
+        def read_zipfile_and_write(path: pathlib.Path, zippath: str):
+            data = zf.read(zippath)
+            path.parent.mkdir(parents=True, exist_ok=True)
+            path.write_bytes(data)
+
+        for zip_info in zf.infolist():
+            zippath = zip_info.filename
+            if m := RE_LIB_MODULE_ARCH.match(zippath):
+                lib_path = libdir / m["arch"] / m["filename"]
+                read_zipfile_and_write(lib_path, zippath)
+                if m["filename"].endswith(".so"):
+                    os.chmod(lib_path, stat.S_IRWXU | stat.S_IRGRP | stat.S_IXGRP | stat.S_IROTH | stat.S_IXOTH)
+
+            elif m := RE_INC_MODULE_ARCH.match(zippath):
+                header_path = incdir / m["header"]
+                read_zipfile_and_write(header_path, zippath)
+            elif m:= RE_LICENSE.match(zippath):
+                license_path = licensedir / m["filename"]
+                read_zipfile_and_write(license_path, zippath)
+            elif m:= RE_PROGUARD.match(zippath):
+                proguard_path = javadir / m["filename"]
+                read_zipfile_and_write(proguard_path, zippath)
+            elif m:= RE_CMAKE.match(zippath):
+                cmake_path = cmakedir / m["filename"]
+                read_zipfile_and_write(cmake_path, zippath)
+            elif zippath == "classes.jar":
+                versioned_jar_path = javadir / f"{project_name}-{project_version}.jar"
+                unversioned_jar_path = javadir / f"{project_name}.jar"
+                read_zipfile_and_write(versioned_jar_path, zippath)
+                os.symlink(src=versioned_jar_path.name, dst=unversioned_jar_path)
+            elif zippath == "classes-sources.jar":
+                jarpath = javadir / f"{project_name}-{project_version}-sources.jar"
+                read_zipfile_and_write(jarpath, zippath)
+            elif zippath == "classes-doc.jar":
+                data = zf.read(zippath)
+                with zipfile.ZipFile(io.BytesIO(data)) as doc_zf:
+                    doc_zf.extractall(javadocdir)
+
+    print("... done")
+    return 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())