libmaxminddb/binding.js

Node.js bindings for libmaxminddb (to read MaxMind DB with the best performance - using memory-mapped file!)

const fs = require('fs');
const path = require('path');
const {pkgConfigPath, useGlobalLibmaxminddb, vendorPath} = require('./install/vars-build');
const {shellEsc, spawnSync} = require('./install/utils');

const os = process.platform === 'win32' ? 'win' : process.platform === 'darwin' ? 'mac' : 'linux';
const pkgConfig = (...args) => {
    return spawnSync(`PKG_CONFIG_PATH=${shellEsc(pkgConfigPath)} pkg-config ${args.map(shellEsc).join(' ')}`).trim();
};

const target = {
    target_name: 'maxminddb',
    sources: [
        'src/errors.cc',
        'src/index.cc',
        'src/mmdb_reader.cc',
        'src/util/async_worker.cc',
        'src/util/string_copy.cc',
        'src/util/v8_helpers.cc',
    ],
    include_dirs: [path.dirname(require.resolve('nan'))],
    link_settings: {
        library_dirs: [],
        libraries: [],
    },
    defines: [],
    configurations: {
        Debug: {},
        Release: {},
    },
};

if (useGlobalLibmaxminddb) {
    target.include_dirs.push(pkgConfig('--cflags-only-I', 'libmaxminddb').substr(2));
    target.link_settings.libraries.push(pkgConfig('--libs', 'libmaxminddb'));
} else {
    target.include_dirs.push(vendorPath);
    target.link_settings.library_dirs.push(vendorPath);
    if (os === 'win') {
        target.link_settings.libraries.push('maxminddb.lib', 'Ws2_32.lib');
    } else {
        target.link_settings.libraries.push('-lmaxminddb');
    }
}

if (os === 'linux') {
    let useCxx11Abi;
    if (useGlobalLibmaxminddb) {
        const lib = `${pkgConfig('--variable', 'libdir', 'libmaxminddb')}/libmaxminddb.so`;
        useCxx11Abi = spawnSync(
            `if readelf -Ws ${shellEsc(lib)} | c++filt | grep -qF __cxx11; then echo 1; else echo 0; fi`
        ).trim();
    } else {
        useCxx11Abi = 1;
    }
    target.defines.push(`_GLIBCXX_USE_CXX11_ABI=${useCxx11Abi}`);
}

if (os === 'win') {
    target.configurations.Debug.msvs_settings = {
        VCCLCompilerTool: {
            RuntimeLibrary: '3', // /MDd
        },
    };
    target.configurations.Release.msvs_settings = {
        VCCLCompilerTool: {
            RuntimeLibrary: '2', // /MD
        },
    };
}

const binding = {
    __NOTE: 'This file was generated by binding.js',
    targets: [target],
};
fs.writeFileSync(path.join(__dirname, 'binding.gyp'), JSON.stringify(binding, null, 2), 'utf8');