text: var path = require('path')
      , log = require('npmlog')
  
  function findNodeDirectory(scriptLocation, processObj) {
      // set dirname and process if not passed in
      // this facilitates regression tests
      if (scriptLocation === undefined) {
          scriptLocation = __dirname
      }
      if (processObj === undefined) {
          processObj = process
      }
  
      // Have a look to see what is above us, to try and work out where we are
      npm_parent_directory = path.join(scriptLocation, '../../../..')
      log.verbose('node-gyp root', 'npm_parent_directory is '
          + path.basename(npm_parent_directory))
      node_root_dir = ""
  
      log.verbose('node-gyp root', 'Finding node root directory')
      if (path.basename(npm_parent_directory) === 'deps') {
          // We are in a build directory where this script lives in
          // deps/npm/node_modules/node-gyp/lib
          node_root_dir = path.join(npm_parent_directory, '..')
          log.verbose('node-gyp root', 'in build directory, root = '
              + node_root_dir)
      } else if (path.basename(npm_parent_directory) === 'node_modules') {
          // We are in a node install directory where this script lives in
          // lib/node_modules/npm/node_modules/node-gyp/lib or
          // node_modules/npm/node_modules/node-gyp/lib depending on the
          // platform
          if (processObj.platform === 'win32') {
              node_root_dir = path.join(npm_parent_directory, '..')
          } else {
              node_root_dir = path.join(npm_parent_directory, '../..')
          }
          log.verbose('node-gyp root', 'in install directory, root = '
              + node_root_dir)
      } else {
          // We don't know where we are, try working it out from the location
          // of the node binary
          var node_dir = path.dirname(processObj.execPath)
          var directory_up = path.basename(node_dir)
          if (directory_up === 'bin') {
              node_root_dir = path.join(node_dir, '..')
          } else if (directory_up === 'Release' || directory_up === 'Debug') {
              // If we are a recently built node, and the directory structure
              // is that of a repository. If we are on Windows then we only need
              // to go one level up, everything else, two
              if (processObj.platform === 'win32') {
                  node_root_dir = path.join(node_dir, '..')
              } else {
                  node_root_dir = path.join(node_dir, '../..')
              }
          }
          // Else return the default blank, "".
      }
      return node_root_dir
  }
  
  module.exports = findNodeDirectory
  