Index: node_modules/node-gyp/lib/build.js
===================================================================
--- node_modules/node-gyp/lib/build.js	(revision 81bc7da776d8cda42939ef4ab350c88d13b4941f)
+++ node_modules/node-gyp/lib/build.js	(revision 81bc7da776d8cda42939ef4ab350c88d13b4941f)
@@ -0,0 +1,204 @@
+'use strict'
+
+const fs = require('graceful-fs')
+const path = require('path')
+const glob = require('glob')
+const log = require('npmlog')
+const which = require('which')
+const win = process.platform === 'win32'
+
+function build (gyp, argv, callback) {
+  var platformMake = 'make'
+  if (process.platform === 'aix') {
+    platformMake = 'gmake'
+  } else if (process.platform.indexOf('bsd') !== -1) {
+    platformMake = 'gmake'
+  } else if (win && argv.length > 0) {
+    argv = argv.map(function (target) {
+      return '/t:' + target
+    })
+  }
+
+  var makeCommand = gyp.opts.make || process.env.MAKE || platformMake
+  var command = win ? 'msbuild' : makeCommand
+  var jobs = gyp.opts.jobs || process.env.JOBS
+  var buildType
+  var config
+  var arch
+  var nodeDir
+  var guessedSolution
+
+  loadConfigGypi()
+
+  /**
+   * Load the "config.gypi" file that was generated during "configure".
+   */
+
+  function loadConfigGypi () {
+    var configPath = path.resolve('build', 'config.gypi')
+
+    fs.readFile(configPath, 'utf8', function (err, data) {
+      if (err) {
+        if (err.code === 'ENOENT') {
+          callback(new Error('You must run `node-gyp configure` first!'))
+        } else {
+          callback(err)
+        }
+        return
+      }
+      config = JSON.parse(data.replace(/#.+\n/, ''))
+
+      // get the 'arch', 'buildType', and 'nodeDir' vars from the config
+      buildType = config.target_defaults.default_configuration
+      arch = config.variables.target_arch
+      nodeDir = config.variables.nodedir
+
+      if ('debug' in gyp.opts) {
+        buildType = gyp.opts.debug ? 'Debug' : 'Release'
+      }
+      if (!buildType) {
+        buildType = 'Release'
+      }
+
+      log.verbose('build type', buildType)
+      log.verbose('architecture', arch)
+      log.verbose('node dev dir', nodeDir)
+
+      if (win) {
+        findSolutionFile()
+      } else {
+        doWhich()
+      }
+    })
+  }
+
+  /**
+   * On Windows, find the first build/*.sln file.
+   */
+
+  function findSolutionFile () {
+    glob('build/*.sln', function (err, files) {
+      if (err) {
+        return callback(err)
+      }
+      if (files.length === 0) {
+        return callback(new Error('Could not find *.sln file. Did you run "configure"?'))
+      }
+      guessedSolution = files[0]
+      log.verbose('found first Solution file', guessedSolution)
+      doWhich()
+    })
+  }
+
+  /**
+   * Uses node-which to locate the msbuild / make executable.
+   */
+
+  function doWhich () {
+    // On Windows use msbuild provided by node-gyp configure
+    if (win) {
+      if (!config.variables.msbuild_path) {
+        return callback(new Error(
+          'MSBuild is not set, please run `node-gyp configure`.'))
+      }
+      command = config.variables.msbuild_path
+      log.verbose('using MSBuild:', command)
+      doBuild()
+      return
+    }
+    // First make sure we have the build command in the PATH
+    which(command, function (err, execPath) {
+      if (err) {
+        // Some other error or 'make' not found on Unix, report that to the user
+        callback(err)
+        return
+      }
+      log.verbose('`which` succeeded for `' + command + '`', execPath)
+      doBuild()
+    })
+  }
+
+  /**
+   * Actually spawn the process and compile the module.
+   */
+
+  function doBuild () {
+    // Enable Verbose build
+    var verbose = log.levels[log.level] <= log.levels.verbose
+    var j
+
+    if (!win && verbose) {
+      argv.push('V=1')
+    }
+
+    if (win && !verbose) {
+      argv.push('/clp:Verbosity=minimal')
+    }
+
+    if (win) {
+      // Turn off the Microsoft logo on Windows
+      argv.push('/nologo')
+    }
+
+    // Specify the build type, Release by default
+    if (win) {
+      // Convert .gypi config target_arch to MSBuild /Platform
+      // Since there are many ways to state '32-bit Intel', default to it.
+      // N.B. msbuild's Condition string equality tests are case-insensitive.
+      var archLower = arch.toLowerCase()
+      var p = archLower === 'x64' ? 'x64'
+        : (archLower === 'arm' ? 'ARM'
+          : (archLower === 'arm64' ? 'ARM64' : 'Win32'))
+      argv.push('/p:Configuration=' + buildType + ';Platform=' + p)
+      if (jobs) {
+        j = parseInt(jobs, 10)
+        if (!isNaN(j) && j > 0) {
+          argv.push('/m:' + j)
+        } else if (jobs.toUpperCase() === 'MAX') {
+          argv.push('/m:' + require('os').cpus().length)
+        }
+      }
+    } else {
+      argv.push('BUILDTYPE=' + buildType)
+      // Invoke the Makefile in the 'build' dir.
+      argv.push('-C')
+      argv.push('build')
+      if (jobs) {
+        j = parseInt(jobs, 10)
+        if (!isNaN(j) && j > 0) {
+          argv.push('--jobs')
+          argv.push(j)
+        } else if (jobs.toUpperCase() === 'MAX') {
+          argv.push('--jobs')
+          argv.push(require('os').cpus().length)
+        }
+      }
+    }
+
+    if (win) {
+      // did the user specify their own .sln file?
+      var hasSln = argv.some(function (arg) {
+        return path.extname(arg) === '.sln'
+      })
+      if (!hasSln) {
+        argv.unshift(gyp.opts.solution || guessedSolution)
+      }
+    }
+
+    var proc = gyp.spawn(command, argv)
+    proc.on('exit', onExit)
+  }
+
+  function onExit (code, signal) {
+    if (code !== 0) {
+      return callback(new Error('`' + command + '` failed with exit code: ' + code))
+    }
+    if (signal) {
+      return callback(new Error('`' + command + '` got signal: ' + signal))
+    }
+    callback()
+  }
+}
+
+module.exports = build
+module.exports.usage = 'Invokes `' + (win ? 'msbuild' : 'make') + '` and builds the module'