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website/node_modules/npm/lib/install/is-fs-access-available.js

@@ -0,0 +1,22 @@
+'use strict'
+var fs = require('fs')
+var semver = require('semver')
+var isWindows = process.platform === 'win32'
+
+// fs.access first introduced in node 0.12 / io.js
+if (!fs.access) {
+  module.exports = false
+} else if (!isWindows) {
+  // fs.access always works on non-Windows OSes
+  module.exports = true
+} else {
+  // The Windows implementation of `fs.access` has a bug where it will
+  // sometimes return access errors all the time for directories, even
+  // when access is available. As all we actually test ARE directories, this
+  // is a bit of a problem.
+  // This was fixed in io.js version 1.5.0
+  // As of 2015-07-20, it is still unfixed in node:
+  // https://github.com/joyent/node/issues/25657
+
+  module.exports = semver.gte(process.version, '1.5.0')
+}