flow like the river

VISUALIZACION/node_modules/node-addon-api/index.js

@@ -0,0 +1,45 @@
+var path = require('path');
+
+var versionArray = process.version
+  .substr(1)
+  .replace(/-.*$/, '')
+  .split('.')
+  .map(function(item) {
+    return +item;
+  });
+
+// TODO: Check if the main node semantic version is within multiple ranges,
+// or detect presence of built-in N-API by some other mechanism TBD.
+
+// We know which version of Node.js first shipped the incarnation of the API
+// available in *this* package. So, if we find that the Node.js version is below
+// that, we indicate that the API is missing from Node.js.
+var isNodeApiBuiltin = (
+  versionArray[0] > 8 ||
+  (versionArray[0] == 8 && versionArray[1] >= 6) ||
+  (versionArray[0] == 6 && versionArray[1] >= 15) ||
+  (versionArray[0] == 6 && versionArray[1] >= 14 && versionArray[2] >= 2));
+
+// The flag is not needed when the Node version is not 8, nor if the API is
+// built-in, because we removed the flag at the same time as creating the final
+// incarnation of the built-in API.
+var needsFlag = (!isNodeApiBuiltin && versionArray[0] == 8);
+
+var include = [__dirname];
+var gyp = path.join(__dirname, 'src', 'node_api.gyp');
+
+if (isNodeApiBuiltin) {
+  gyp += ':nothing';
+} else {
+  gyp += ':node-api';
+  include.unshift(path.join(__dirname, 'external-napi'));
+}
+
+module.exports = {
+  include: include.map(function(item) {
+    return '"' + item + '"';
+  }).join(' '),
+  gyp: gyp,
+  isNodeApiBuiltin: isNodeApiBuiltin,
+  needsFlag: needsFlag
+};