1 files changed, 33 insertions, 0 deletions
diff --git a/deps/npm/lib/utils/unsupported.js b/deps/npm/lib/utils/unsupported.js
new file mode 100644
index 0000000000..5e74e3490f
--- /dev/null
+++ b/deps/npm/lib/utils/unsupported.js
@@ -0,0 +1,33 @@
+'use strict'
+var semver = require('semver')
+var supportedNode = '0.12 || >= 4'
+var knownBroken = '>=0.1 <=0.7'
+
+var checkVersion = exports.checkVersion = function (version) {
+  var versionNoPrerelease = version.replace(/-.*$/, '')
+  return {
+    broken: semver.satisfies(versionNoPrerelease, knownBroken),
+    unsupported: !semver.satisfies(versionNoPrerelease, supportedNode)
+  }
+}
+
+exports.checkForBrokenNode = function () {
+  var nodejs = checkVersion(process.version)
+  if (nodejs.broken) {
+    console.error('ERROR: npm is known not to run on Node.js ' + process.version)
+    console.error("You'll need to upgrade to a newer version in order to use this")
+    console.error('version of npm. You can find the latest version at https://nodejs.org/')
+    process.exit(1)
+  }
+}
+
+exports.checkForUnsupportedNode = function () {
+  var nodejs = checkVersion(process.version)
+  if (nodejs.unsupported) {
+    var log = require('npmlog')
+    log.warn('npm', 'npm does not support Node.js ' + process.version)
+    log.warn('npm', 'You should probably upgrade to a newer version of node as we')
+    log.warn('npm', "can't make any promises that npm will work with this version.")
+    log.warn('npm', 'You can find the latest version at https://nodejs.org/')
+  }
+}