build: rewritten the Android build system

Completely rewritten the Android build system using Python

Co-Authored-By: 东灯 <43312495+Lampese@users.noreply.github.com>
Co-Authored-By: Feng Yu <F3n67u@outlook.com>
PR-URL: https://github.com/nodejs/node/pull/44207
Refs: https://github.com/nodejs/node/issues/36287
Reviewed-By: Feng Yu <F3n67u@outlook.com>
Reviewed-By: Christian Clauss <cclauss@me.com>

3 files changed, 137 insertions, 83 deletions

diff --git a/android-configure b/android-configure
index 6200f35200..8bab2e0b90 100755
--- a/android-configure
+++ b/android-configure
@@ -1,83 +1,35 @@
-#!/bin/bash
-
-# In order to cross-compile node for Android using NDK, run:
-#   source android-configure <path_to_ndk> [arch]
-#
-# By running android-configure with source, will allow environment variables to
-# be persistent in current session. This is useful for installing native node
-# modules with npm. Also, don't forget to set the arch in npm config using
-# 'npm config set arch=<arch>'
-
-if [ $# -ne 3 ]; then
-  echo "$0 should have 3 parameters: ndk_path, target_arch and sdk_version"
-  return 1
-fi
-
-NDK_PATH=$1
-ARCH="$2"
-ANDROID_SDK_VERSION=$3
-
-if [ $ANDROID_SDK_VERSION -lt 24 ]; then
-  echo "$ANDROID_SDK_VERSION should equal or later than 24 (Android 7.0)"
-fi
-
-case $ARCH in
-    arm)
-        DEST_CPU="arm"
-        TOOLCHAIN_NAME="armv7a-linux-androideabi"
-        ;;
-    x86)
-        DEST_CPU="ia32"
-        TOOLCHAIN_NAME="i686-linux-android"
-        ;;
-    x86_64)
-        DEST_CPU="x64"
-        TOOLCHAIN_NAME="x86_64-linux-android"
-        ARCH="x64"
-        ;;
-    arm64|aarch64)
-        DEST_CPU="arm64"
-        TOOLCHAIN_NAME="aarch64-linux-android"
-        ARCH="arm64"
-        ;;
-    *)
-        echo "Unsupported architecture provided: $ARCH"
-        return 1
-        ;;
-esac
-
-HOST_OS="linux"
-HOST_ARCH="x86_64"
-export CC_host=$(command -v gcc)
-export CXX_host=$(command -v g++)
-
-host_gcc_version=$($CC_host --version | grep gcc | awk '{print $NF}')
-major=$(echo $host_gcc_version | awk -F . '{print $1}')
-minor=$(echo $host_gcc_version | awk -F . '{print $2}')
-if [ -z $major ] || [ -z $minor ] || [ $major -lt 6 ] || ( [ $major -eq 6 ] && [ $minor -lt 3 ] ); then
-  echo "host gcc $host_gcc_version is too old, need gcc 6.3.0"
-  return 1
-fi
-
-SUFFIX="$TOOLCHAIN_NAME$ANDROID_SDK_VERSION"
-TOOLCHAIN=$NDK_PATH/toolchains/llvm/prebuilt/$HOST_OS-$HOST_ARCH
-
-export PATH=$TOOLCHAIN/bin:$PATH
-export CC=$TOOLCHAIN/bin/$SUFFIX-clang
-export CXX=$TOOLCHAIN/bin/$SUFFIX-clang++
-
-
-GYP_DEFINES="target_arch=$ARCH"
-GYP_DEFINES+=" v8_target_arch=$ARCH"
-GYP_DEFINES+=" android_target_arch=$ARCH"
-GYP_DEFINES+=" host_os=$HOST_OS OS=android"
-export GYP_DEFINES
-
-if [ -f "configure" ]; then
-    ./configure \
-        --dest-cpu=$DEST_CPU \
-        --dest-os=android \
-        --without-snapshot \
-        --openssl-no-asm \
-        --cross-compiling
-fi
+#!/bin/sh
+
+# Locate an acceptable Python interpreter and then re-execute the script.
+# Note that the mix of single and double quotes is intentional,
+# as is the fact that the ] goes on a new line.
+_=[ 'exec' '/bin/sh' '-c' '''
+command -v python3.10 >/dev/null && exec python3.10 "$0" "$@"
+command -v python3.9 >/dev/null && exec python3.9 "$0" "$@"
+command -v python3.8 >/dev/null && exec python3.8 "$0" "$@"
+command -v python3.7 >/dev/null && exec python3.7 "$0" "$@"
+command -v python3.6 >/dev/null && exec python3.6 "$0" "$@"
+command -v python3 >/dev/null && exec python3 "$0" "$@"
+exec python "$0" "$@"
+''' "$0" "$@"
+]
+del _
+
+import sys
+try:
+  from shutil import which
+except ImportError:
+  from distutils.spawn import find_executable as which
+
+print('Node.js android configure: Found Python {}.{}.{}...'.format(*sys.version_info))
+acceptable_pythons = ((3, 10), (3, 9), (3, 8), (3, 7), (3, 6))
+if sys.version_info[:2] in acceptable_pythons:
+  import android_configure
+else:
+  python_cmds = ['python{}.{}'.format(*vers) for vers in acceptable_pythons]
+  sys.stderr.write('Please use {}.\n'.format(' or '.join(python_cmds)))
+  for python_cmd in python_cmds:
+      python_cmd_path = which(python_cmd)
+      if python_cmd_path and 'pyenv/shims' not in python_cmd_path:
+        sys.stderr.write('\t{} {}\n'.format(python_cmd_path, ' '.join(sys.argv[:1])))
+  sys.exit(1)
diff --git a/android-patches/trap-handler.h.patch b/android-patches/trap-handler.h.patch
new file mode 100644
index 0000000000..f4f151f652
--- /dev/null
+++ b/android-patches/trap-handler.h.patch
@@ -0,0 +1,26 @@
+--- trap-handler.h	2022-08-11 09:01:23.384000000 +0800
++++ fixed-trap-handler.h	2022-08-11 09:09:15.352000000 +0800
+@@ -17,23 +17,7 @@
+ namespace internal {
+ namespace trap_handler {
+ 
+-// X64 on Linux, Windows, MacOS, FreeBSD.
+-#if V8_HOST_ARCH_X64 && V8_TARGET_ARCH_X64 &&                        \
+-    ((V8_OS_LINUX && !V8_OS_ANDROID) || V8_OS_WIN || V8_OS_DARWIN || \
+-     V8_OS_FREEBSD)
+-#define V8_TRAP_HANDLER_SUPPORTED true
+-// Arm64 (non-simulator) on Mac.
+-#elif V8_TARGET_ARCH_ARM64 && V8_HOST_ARCH_ARM64 && V8_OS_DARWIN
+-#define V8_TRAP_HANDLER_SUPPORTED true
+-// Arm64 simulator on x64 on Linux, Mac, or Windows.
+-#elif V8_TARGET_ARCH_ARM64 && V8_HOST_ARCH_X64 && \
+-    (V8_OS_LINUX || V8_OS_DARWIN)
+-#define V8_TRAP_HANDLER_VIA_SIMULATOR
+-#define V8_TRAP_HANDLER_SUPPORTED true
+-// Everything else is unsupported.
+-#else
+ #define V8_TRAP_HANDLER_SUPPORTED false
+-#endif
+ 
+ // Setup for shared library export.
+ #if defined(BUILDING_V8_SHARED) && defined(V8_OS_WIN)
\ No newline at end of file
diff --git a/android_configure.py b/android_configure.py
new file mode 100644
index 0000000000..57d9402391
--- /dev/null
+++ b/android_configure.py
@@ -0,0 +1,76 @@
+import platform
+import sys
+import os
+
+# TODO: In next version, it will be a JSON file listing all the patches, and then it will iterate through to apply them.
+def patch_android():
+    print("- Patches List -")
+    print("[1] [deps/v8/src/trap-handler/trap-handler.h] related to https://github.com/nodejs/node/issues/36287")
+    if platform.system() == "Linux":
+        os.system('patch -f ./deps/v8/src/trap-handler/trap-handler.h < ./android-patches/trap-handler.h.patch')
+    print("\033[92mInfo: \033[0m" + "Tried to patch.")
+
+if platform.system() == "Windows":
+    print("android-configure is not supported on Windows yet.")
+    sys.exit(1)
+
+if len(sys.argv) == 2 and sys.argv[1] == "patch":
+    patch_android()
+    sys.exit(0)
+
+if len(sys.argv) != 4:
+    print("Usage: ./android-configure [patch] <path to the Android NDK> <Android SDK version> <target architecture>")
+    sys.exit(1)
+
+if not os.path.exists(sys.argv[1]) or not os.listdir(sys.argv[1]):
+    print("\033[91mError: \033[0m" + "Invalid path to the Android NDK")
+    sys.exit(1)
+
+if int(sys.argv[2]) < 24:
+    print("\033[91mError: \033[0m" + "Android SDK version must be at least 24 (Android 7.0)")
+    sys.exit(1)
+
+android_ndk_path = sys.argv[1]
+android_sdk_version = sys.argv[2]
+arch = sys.argv[3]
+
+if arch == "arm":
+    DEST_CPU = "arm"
+    TOOLCHAIN_PREFIX = "armv7a-linux-androideabi"
+elif arch in ("aarch64", "arm64"):
+    DEST_CPU = "arm64"
+    TOOLCHAIN_PREFIX = "aarch64-linux-android"
+    arch = "arm64"
+elif arch == "x86":
+    DEST_CPU = "ia32"
+    TOOLCHAIN_PREFIX = "i686-linux-android"
+elif arch == "x86_64":
+    DEST_CPU = "x64"
+    TOOLCHAIN_PREFIX = "x86_64-linux-android"
+    arch = "x64"
+else:
+    print("\033[91mError: \033[0m" + "Invalid target architecture, must be one of: arm, arm64, aarch64, x86, x86_64")
+    sys.exit(1)
+
+print("\033[92mInfo: \033[0m" + "Configuring for " + DEST_CPU + "...")
+
+if platform.system() == "Darwin":
+    host_os = "darwin"
+    toolchain_path = android_ndk_path + "/toolchains/llvm/prebuilt/darwin-x86_64"
+
+elif platform.system() == "Linux":
+    host_os = "linux"
+    toolchain_path = android_ndk_path + "/toolchains/llvm/prebuilt/linux-x86_64"
+
+os.environ['PATH'] += os.pathsep + toolchain_path + "/bin"
+os.environ['CC'] = toolchain_path + "/bin/" + TOOLCHAIN_PREFIX + android_sdk_version + "-" +  "clang"
+os.environ['CXX'] = toolchain_path + "/bin/" + TOOLCHAIN_PREFIX + android_sdk_version + "-" + "clang++"
+
+GYP_DEFINES = "target_arch=" + arch
+GYP_DEFINES += " v8_target_arch=" + arch
+GYP_DEFINES += " android_target_arch=" + arch
+GYP_DEFINES += " host_os=" + host_os + " OS=android"
+os.environ['GYP_DEFINES'] = GYP_DEFINES
+
+if os.path.exists("./configure"):
+    os.system("./configure --dest-cpu=" + DEST_CPU + " --dest-os=android --openssl-no-asm --cross-compiling")