Implement building and publishing Android packages

.github/workflows/main.yml

@@ -87,6 +87,16 @@ jobs:
         python ci/download-wasmtime.py musl x86_64
         python ci/build-rust.py
         python setup.py bdist_wheel --plat-name musllinux_1_2_x86_64
+    - run: |
+        git clean -fdx wasmtime build
+        python ci/download-wasmtime.py android x86_64
+        python ci/build-rust.py
+        python setup.py bdist_wheel --plat-name android_26_x86_64
+    - run: |
+        git clean -fdx wasmtime build
+        python ci/download-wasmtime.py android aarch64
+        python ci/build-rust.py
+        python setup.py bdist_wheel --plat-name android_26_arm64_v8a
 
     # Build an "any" wheel with:
     #

ci/download-wasmtime.py

@@ -39,6 +39,10 @@ def main(platform, arch):
     elif platform == 'darwin':
         filename = 'wasmtime-{}-{}-macos-c-api.tar.xz'.format(version, arch)
         libname = '_libwasmtime.dylib'
+    elif platform == 'android':
+        filename = 'wasmtime-{}-{}-android-c-api.tar.xz'.format(version, arch)
+        libname = '_libwasmtime.so'
+        dirname = 'android-{}'.format(arch)
     else:
         raise RuntimeError("unknown platform: " + sys.platform)
 

wasmtime/_ffi.py

@@ -8,14 +8,21 @@
 if sys.maxsize <= 2**32:
     raise RuntimeError("wasmtime only works on 64-bit platforms right now")
 
-if sys.platform == 'linux':
+sys_platform = sys.platform
+
+# For Python versions <=3.12. 3.13+ supports PEP 738 and uses sys.platform
+if hasattr(sys, 'getandroidapilevel'):
+    sys_platform = 'android'
+
+if sys_platform == 'linux' or sys_platform == 'android':
     libname = '_libwasmtime.so'
-elif sys.platform == 'win32':
+elif sys_platform == 'win32':
     libname = '_wasmtime.dll'
-elif sys.platform == 'darwin':
+elif sys_platform == 'darwin':
     libname = '_libwasmtime.dylib'
 else:
-    raise RuntimeError("unsupported platform `{}` for wasmtime".format(sys.platform))
+    raise RuntimeError("unsupported platform `{}` for wasmtime".format(sys_platform))
+
 
 machine = platform.machine()
 if machine == 'AMD64':
@@ -25,9 +32,8 @@
 if machine != 'x86_64' and machine != 'aarch64':
     raise RuntimeError("unsupported architecture for wasmtime: {}".format(machine))
 
-filename = Path(__file__).parent / (sys.platform + '-' + machine) / libname
-if not filename.exists():
-    raise RuntimeError("precompiled wasmtime binary not found at `{}`".format(filename))
+filename = Path(__file__).parent / (sys_platform + '-' + machine) / libname
+
 dll = cdll.LoadLibrary(str(filename))
 
 WASM_I32 = c_uint8(0)