'use strict';
const common = require('../common');
const path = require('path');

// If node executable is linked to shared lib, need to take care about the
// shared lib path.
exports.addLibraryPath = function(env) {
  if (!process.config.variables.node_shared) {
    return;
  }

  env = env || process.env;

  env.LD_LIBRARY_PATH =
    (env.LD_LIBRARY_PATH ? env.LD_LIBRARY_PATH + path.delimiter : '') +
    path.join(path.dirname(process.execPath), 'lib.target');
  // For AIX.
  env.LIBPATH =
    (env.LIBPATH ? env.LIBPATH + path.delimiter : '') +
    path.join(path.dirname(process.execPath), 'lib.target');
  // For Mac OSX.
  env.DYLD_LIBRARY_PATH =
    (env.DYLD_LIBRARY_PATH ? env.DYLD_LIBRARY_PATH + path.delimiter : '') +
    path.dirname(process.execPath);
  // For Windows.
  env.PATH =
    (env.PATH ? env.PATH + path.delimiter : '') +
    path.dirname(process.execPath);
};

// Get the full path of shared lib.
exports.getSharedLibPath = function() {
  if (common.isWindows) {
    return path.join(path.dirname(process.execPath), 'node.dll');
  } else if (common.isOSX) {
    return path.join(path.dirname(process.execPath),
                     `libnode.${process.config.variables.shlib_suffix}`);
  } else {
    return path.join(path.dirname(process.execPath),
                     'lib.target',
                     `libnode.${process.config.variables.shlib_suffix}`);
  }
};

// Get the binary path of stack frames.
exports.getBinaryPath = function() {
  return process.config.variables.node_shared ?
    exports.getSharedLibPath() : process.execPath;
};