IOS Build - For Node.js Mobile compatibilty

[david-metrica]

It would be great if there was an option to compile for NodeJS Mobile.
https://github.com/nodejs-mobile

I intend to use this mainly for IOS .

There is a prebuild script that builds the native modules, however it requires GYP, Neon or node-bindgen:
https://github.com/nodejs-mobile/prebuild-for-nodejs-mobile

[b-ma]

Hey, thanks for the feedback

Unfortunately the bindings here are made using https://napi.rs/, not Neon. Maybe you could open an issue in the https://github.com/nodejs-mobile/prebuild-for-nodejs-mobile repo, see if they can consider adding support for napi-rs first?

[david-metrica]

Hello again.
I implemented a build script with little modifications to the project.
Here are the modifications in case you want to implement this in the main branch.

build.rs

use std::env;
extern crate napi_build;

fn main() {
    let target = env::var("TARGET").expect("TARGET not set");
    if target.contains("apple-ios") {
        let is_simulator = target == "x86_64-apple-ios";
        let framework_folder = match is_simulator {
            true => "ios-arm64_x86_64-simulator",
            false => "ios-arm64",
        };
        println!(
            "cargo:rustc-link-search=framework=3rdparty/IOS/nodejs-mobile/NodeMobile.xcframework/{}",
            framework_folder
        );
        println!("cargo:rustc-link-lib=framework=NodeMobile");
    }
    napi_build::setup();
}

build_ios.sh (Place in the root directory)

export IOS_MODULE_FOLDER=ios_node_modules
rm -r $IOS_MODULE_FOLDER
mkdir $IOS_MODULE_FOLDER
export MODULE_FOLDER=$IOS_MODULE_FOLDER/node-web-audio-api
mkdir $MODULE_FOLDER
mkdir $MODULE_FOLDER/prebuilds

#ARM64
export TARGET=aarch64-apple-ios
mkdir $MODULE_FOLDER/prebuilds/ios-arm64
npm run generate
cargo build --release --target=$TARGET
node ./.scripts/move-artifact.mjs --release

cp node-web-audio-api.build-release.node $MODULE_FOLDER/prebuilds/ios-arm64/node-web-audio-api.node

#X86_64
export TARGET=x86_64-apple-ios
mkdir $MODULE_FOLDER/prebuilds/ios-x64
npm run generate
cargo build --release --target=$TARGET
node ./.scripts/move-artifact.mjs --release
cp node-web-audio-api.build-release.node $MODULE_FOLDER/prebuilds/ios-x86_64/node-web-audio-api.node

rm node-web-audio-api.build-release.node

cp -r js $MODULE_FOLDER

cp index.cjs $MODULE_FOLDER/index.js

cat <<EOF > $MODULE_FOLDER/package.json
{
  "name": "metrica-media-js",
  "main": "index.js"
}
EOF


cat <<EOF > $MODULE_FOLDER/load-native.cjs
const path = require('path');
const fs = require('fs');

let archFolder;

if (process.platform === 'ios') {
  if (process.arch === 'arm64') {
    archFolder = 'ios-arm64';
  } else if (process.arch === 'x64') {
    archFolder = 'ios-x64';
  } else {
    throw new Error('Unsupported arch on darwin: '+ process.arch);
  }
} else if (process.platform === 'android') {
  archFolder = 'android-arm64';
} else {
  throw new Error('Unsupported platform: ' + process.platform);
}

const nativePath = path.join(__dirname, 'prebuilds', archFolder, 'node-web-audio-api.node');

if (!fs.existsSync(nativePath)) {
  throw new Error('Native binding not found at: ' + nativePath);
}

const nativeBinding = require(nativePath);

module.exports = nativeBinding;
EOF

This scripts requires a folder called 3rdparty/IOS/node-js-mobile that contains NodeMobile.xcframework

After running the script, ios_node_modules/node-web-audio-api will be generated. node-web-audio-api can be dropped in the NodeJS Mobile node_modules folder.

Feel free to ask me any questions about this.
Have a great day!