@red-mobile/nodejs-mobile-cordova/install/hooks/android/before-plugin-install.js

Node.js for Mobile Apps Cordova plugin

var fs = require("fs");
var zlib = require("zlib");

const nodeProjectFolder = "www/nodejs-project";
const libFolderPath =
  "plugins/@red-mobile/nodejs-mobile-cordova/libs/android/libnode/bin/";
const path_armv7 = libFolderPath + "armeabi-v7a/";
const path_arm64 = libFolderPath + "arm64-v8a/";
const path_x64 = libFolderPath + "x86_64/";
const lib_name = "libnode.so";
const lib_name_gz = lib_name + ".gz";

function unzip(libFolderPath, callback) {
  const input_filename = libFolderPath + lib_name_gz;
  const output_filename = libFolderPath + lib_name;

  if (fs.existsSync(input_filename)) {
    const input = fs.createReadStream(input_filename);
    const output = fs.createWriteStream(output_filename);

    const ungzip = zlib.createGunzip();
    input
      .pipe(ungzip)
      .pipe(output)
      .on("close", function () {
        fs.unlinkSync(input_filename);
        callback();
      });
  }
}

function unzipAll(callback) {
  unzip(path_armv7, function () {
    unzip(path_arm64, function () {
      unzip(path_x64, function () {
        callback(null);
      });
    });
  });
}

module.exports = function (context) {
  // Create the node project folder if it doesn't exist
  if (!fs.existsSync(nodeProjectFolder)) {
    fs.mkdirSync(nodeProjectFolder);
  }

  return new Promise((resolve, reject) => {
    // Unzip the libnode.so files for each architecture
    unzipAll(function (err) {
      if (err) {
        reject(err);
      } else {
        resolve();
      }
    });
  });
};