Add custom AndroidEnvironment class for Godot

The monodroid BCL expects to find this class in 'Mono.Android.dll'. We're not using Xamarin.Android (at least not for now) so we need a replacement.

bcl.py

@@ -115,6 +115,23 @@ def make_product(opts: BclOpts, product: str):
     for profile in profiles:
         [rm_rf(x) for x in glob.iglob(hidden_file_pattern, recursive=True)]
 
+    if product == 'android':
+        this_script_dir = os.path.dirname(os.path.realpath(__file__))
+        monodroid_profile_dir = '%s/%s' % (install_dir, 'monodroid')
+        godot_profile_dir = '%s/%s' % (install_dir, 'godot_android_ext')
+        refs = ['mscorlib.dll', 'System.Core.dll', 'System.dll']
+
+        mkdir_p(godot_profile_dir)
+
+        android_env_csc_args = [
+            path_join(this_script_dir, 'files', 'godot-AndroidEnvironment.cs'),
+            '-target:library', '-out:%s' % path_join(godot_profile_dir, 'Mono.Android.dll'),
+            '-nostdlib', '-noconfig', '-langversion:latest'
+        ]
+        android_env_csc_args += ['-r:%s' % path_join(monodroid_profile_dir, r) for r in refs]
+
+        run_command('csc', android_env_csc_args)
+
 
 def clean_product(opts: BclOpts, product: str):
     clean_bcl(opts)

files/godot-AndroidEnvironment.cs

@@ -0,0 +1,111 @@
+using System;
+using System.Collections.Generic;
+using System.Net;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+using System.Threading;
+
+// See 'mono/sdks/android/managed/fake-monodroid.cs' and 'xamarin-android/src/Mono.Android/Android.Runtime/AndroidEnvironment.cs'
+
+namespace Android.Runtime
+{
+    public static class AndroidEnvironment
+    {
+        public const string AndroidLogAppName = "Mono.Android";
+
+        static object lock_ = new object();
+
+        [DllImport("__Internal", CallingConvention = CallingConvention.Cdecl)]
+        internal extern static void monodroid_free(IntPtr ptr);
+
+        [DllImport("__Internal", CallingConvention = CallingConvention.Cdecl)]
+        static extern IntPtr _monodroid_timezone_get_default_id();
+
+        [DllImport("__Internal", CallingConvention = CallingConvention.Cdecl)]
+        static extern int _monodroid_getifaddrs(out IntPtr ifap);
+
+        [DllImport("__Internal", CallingConvention = CallingConvention.Cdecl)]
+        static extern void _monodroid_freeifaddrs(IntPtr ifap);
+
+        static string GetDefaultTimeZone()
+        {
+            IntPtr id = _monodroid_timezone_get_default_id();
+
+            try
+            {
+                return Marshal.PtrToStringAnsi(id);
+            }
+            finally
+            {
+                monodroid_free(id);
+            }
+        }
+
+        static SynchronizationContext GetDefaultSyncContext()
+        {
+            // Not needed
+            return null;
+        }
+
+        static IWebProxy GetDefaultProxy()
+        {
+            // Not needed
+            return null;
+        }
+
+        static int GetInterfaceAddresses(out IntPtr ifap)
+        {
+            return _monodroid_getifaddrs(out ifap);
+        }
+
+        static void FreeInterfaceAddresses(IntPtr ifap)
+        {
+            _monodroid_freeifaddrs(ifap);
+        }
+
+        static void DetectCPUAndArchitecture(out ushort builtForCPU, out ushort runningOnCPU, out bool is64bit)
+        {
+            // Not needed (For now? The BCL code that uses the result is commented...)
+            builtForCPU = 0;
+            runningOnCPU = 0;
+            is64bit = Environment.Is64BitProcess;
+        }
+
+        static bool TrustEvaluateSsl(List<byte[]> certsRawData)
+        {
+            // This is legacy. Not needed as BTLS is used by default instead.
+            throw new NotImplementedException();
+        }
+
+        [MethodImpl(MethodImplOptions.InternalCall)]
+        static extern bool _gd_mono_init_cert_store();
+
+        [MethodImpl(MethodImplOptions.InternalCall)]
+        static extern byte[] _gd_mono_android_cert_store_lookup(string alias);
+
+        static bool certStoreInitOk = false;
+
+        static void InitCertStore()
+        {
+            if (certStoreInitOk)
+                return;
+
+            lock (lock_)
+            {
+                certStoreInitOk = _gd_mono_init_cert_store();
+            }
+        }
+
+        static byte[] CertStoreLookup(long hash, bool userStore)
+        {
+            InitCertStore();
+
+            if (!certStoreInitOk)
+                return null;
+
+            string alias = string.Format("{0}:{1:x8}.0", userStore ? "user" : "system", hash);
+
+            return _gd_mono_android_cert_store_lookup(alias);
+        }
+    }
+}

patch_mono.py

@@ -21,7 +21,7 @@ def main(raw_args):
     args = parser.parse_args(raw_args)
 
     this_script_dir = os.path.dirname(os.path.realpath(__file__))
-    patches_dir = os.path.join(this_script_dir, 'patches')
+    patches_dir = os.path.join(this_script_dir, 'files', 'patches')
 
     mono_source_root = args.mono_sources
 

wasm.py

@@ -67,8 +67,8 @@ def setup_wasm_target_template(env: dict, opts: RuntimeOpts, target: str):
     CONFIGURE_FLAGS += [
         '--cache-file=%s/wasm-%s-%s.config.cache' % (opts.configure_dir, target, opts.configuration),
         '--prefix=%s/wasm-%s-%s' % (opts.install_dir, target, opts.configuration),
-        'CFLAGS=%s %s' % (' '.join(CFLAGS), env.get('wasm_%s_CFLAGS' % target, '')),
-        'CXXFLAGS=%s %s' % (' '.join(CXXFLAGS), env.get('$$(wasm_%s_CXXFLAGS' % target, ''))
+        'CFLAGS=%s %s' % (' '.join(CFLAGS), ' '.join(env.get('wasm_%s_CFLAGS' % target, ''))),
+        'CXXFLAGS=%s %s' % (' '.join(CXXFLAGS), ' '.join(env.get('wasm_%s_CXXFLAGS' % target, '')))
     ]
 
     CONFIGURE_FLAGS += env.get('wasm_%s_CONFIGURE_FLAGS' % target, [])
@@ -167,6 +167,7 @@ def make(opts: RuntimeOpts, product: str, target: str):
     wasm_src_files = [
         'driver.c',
         'corebindings.c',
+        'zlib-helper.c',
         'pinvoke-tables-default.h',
         'library_mono.js',
         'binding_support.js',
@@ -177,39 +178,25 @@ def make(opts: RuntimeOpts, product: str, target: str):
 
     mkdir_p(dst_wasm_src_dir)
 
-    src_wasm_src_dir = None
-    src_wasm_src_dir_hints = ['%s/sdks/wasm/src' % opts.mono_source_root, '%s/sdks/wasm/support' % opts.mono_source_root, '%s/sdks/wasm' % opts.mono_source_root]
+    src_dir_hints = [
+        '%s/sdks/wasm/src' % opts.mono_source_root,
+        '%s/sdks/wasm/support' % opts.mono_source_root,
+        '%s/sdks/wasm' % opts.mono_source_root
+    ]
 
-    for src_wasm_src_dir_hint in src_wasm_src_dir_hints:
-        if os.path.isfile(path_join(src_wasm_src_dir_hint, 'driver.c')):
-            src_wasm_src_dir = src_wasm_src_dir_hint
-            break
-
-    if src_wasm_src_dir is None:
-        raise BuildError('Cannot find \'driver.c\' in the Mono source tree. Tried with the following locations: ' + str(src_wasm_src_dir_hints))
+    def dir_with_file(dirs, file):
+        return (d for d in dirs if os.path.isfile(path_join(d, file)))
 
     for wasm_src_file in wasm_src_files:
-        copy(path_join(src_wasm_src_dir, wasm_src_file), dst_wasm_src_dir)
+        src_dir = next(dir_with_file(src_dir_hints, wasm_src_file), '')
+        if not src_dir:
+            raise BuildError('File \'%s\' not found. Probed locations: %s' % (wasm_src_file, str(src_dir_hints)))
+        copy(path_join(src_dir, wasm_src_file), dst_wasm_src_dir)
 
     # Older versions didn't have .NET Core support
-    if os.path.isfile(path_join(src_wasm_src_dir, 'pinvoke-tables-default-netcore.h')):
-        copy(path_join(src_wasm_src_dir, 'pinvoke-tables-default-netcore.h'), dst_wasm_src_dir)
-
-    # Older versions had zlib-helper.c in different locations
-    zlib_helper_name = 'zlib-helper.c'
-    zlib_helper_dir = None
-
-    zlib_helper_dir_hints = src_wasm_src_dir_hints + ['%s/support' % opts.mono_source_root]
-
-    for zlib_helper_dir_hint in zlib_helper_dir_hints:
-        if os.path.isfile(path_join(zlib_helper_dir_hint, zlib_helper_name)):
-            zlib_helper_dir = zlib_helper_dir_hint
-            break
-
-    if zlib_helper_dir is None:
-        raise BuildError('Cannot find \'%s\' in the Mono source tree. Tried with the following locations: %s' % (zlib_helper_name, str(zlib_helper_dir_hints)))
-
-    copy(path_join(zlib_helper_dir, zlib_helper_name), dst_wasm_src_dir)
+    src_dir = next(dir_with_file(src_dir_hints, 'pinvoke-tables-default-netcore.h'), '')
+    if src_dir:
+        copy(path_join(src_dir, 'pinvoke-tables-default-netcore.h'), dst_wasm_src_dir)
 
 
 def clean(opts: RuntimeOpts, product: str, target: str):