Implement build script for WebAssembly combined output and update .gitignore to include build artifacts

Author: abretonc7s

.gitignore

@@ -137,6 +137,13 @@ sherpa-onnx-fire-red-asr-large-zh_en-2025-02-16
 cmake-build-debug
 README-DEV.txt
 
+# WASM combined build artifacts
+wasm/combined/*.wasm
+wasm/combined/sherpa-onnx-wasm-combined.js
+build-wasm-combined/
+# Don't ignore the build script
+!build-wasm-combined.sh
+
 ##clion
 .idea
 scripts/dotnet/examples/obj/Debug/net8.0/Common.AssemblyInfo.cs

build-wasm-combined.sh

@@ -0,0 +1,47 @@
+#!/bin/bash
+#
+# Copyright (c)  2024  Xiaomi Corporation
+
+# Exit on error and print commands
+set -ex
+
+echo "=== Starting build process for sherpa-onnx WASM combined ==="
+
+# Set environment flag to indicate we're using this script
+export SHERPA_ONNX_IS_USING_BUILD_WASM_SH=1
+
+# Create build directory
+mkdir -p build-wasm-combined
+cd build-wasm-combined
+
+echo "=== Running CMake configuration ==="
+# Configure with CMake
+emcmake cmake \
+  -DCMAKE_BUILD_TYPE=Release \
+  -DSHERPA_ONNX_ENABLE_WASM=ON \
+  -DSHERPA_ONNX_ENABLE_CHECK=OFF \
+  -DSHERPA_ONNX_ENABLE_PORTAUDIO=OFF \
+  -DSHERPA_ONNX_ENABLE_BINARY=OFF \
+  -DSHERPA_ONNX_ENABLE_PYTHON=OFF \
+  -DSHERPA_ONNX_ENABLE_JNI=OFF \
+  -DSHERPA_ONNX_ENABLE_C_API=ON \
+  -DSHERPA_ONNX_ENABLE_TEST=OFF \
+  -DSHERPA_ONNX_ENABLE_WASM_COMBINED=ON \
+  -DSHERPA_ONNX_INSTALL_TO_REPO=ON \
+  ..
+
+echo "=== Building the target ==="
+# Build the target with full path to the target
+emmake make -j $(nproc) sherpa-onnx-wasm-combined
+
+echo "=== Installing the files ==="
+# Install the files
+emmake make install/strip
+
+if [ $? -eq 0 ]; then
+  echo "=== Build completed successfully! ==="
+  echo "Files have been installed to bin/wasm/combined and copied to wasm/combined/"
+else
+  echo "=== Build failed! Check the error messages above ==="
+  exit 1
+fi