WIP - add extractor, generate snippet_data

node_modules/detect-port/bin/detect-port

@@ -0,0 +1,79 @@
+#!/usr/bin/env node
+
+'use strict';
+
+const pkg = require('../package');
+
+const args = process.argv.slice(2);
+let arg_0 = args[0];
+
+if (arg_0 && !!~['-v', '--version'].indexOf(arg_0.toLowerCase())) {
+  console.log(pkg.version);
+  process.exit(0);
+}
+
+const removeByValue = (arr, val) => {
+  for (var i = 0; i < arr.length; i++) {
+    if (arr[i] === val) {
+      arr.splice(i, 1);
+      break;
+    }
+  }
+};
+
+const main = require('..');
+
+const port = parseInt(arg_0, 10);
+const isVerbose = !!~args.indexOf('--verbose');
+
+removeByValue(args, '--verbose');
+arg_0 = args[0];
+
+if (!arg_0) {
+  const random = Math.floor(9000 + Math.random() * (65535 - 9000));
+
+  main(random, (err, port) => {
+    if (isVerbose) {
+      if (err) {
+        console.log(`get available port failed with ${err}`);
+      }
+      console.log(`get available port ${port} randomly`);
+    } else {
+      console.log(port || random);
+    }
+  });
+} else if (isNaN(port)) {
+  console.log();
+  console.log(`  \u001b[37m${pkg.description}\u001b[0m`);
+  console.log();
+  console.log('  Usage:');
+  console.log();
+  console.log(`    ${pkg.name} [port]`);
+  console.log();
+  console.log('  Options:');
+  console.log();
+  console.log('    -v, --version    output version and exit');
+  console.log('    -h, --help       output usage information');
+  console.log('    --verbose        output verbose log');
+  console.log();
+  console.log('  Further help:');
+  console.log();
+  console.log(`    ${pkg.homepage}`);
+  console.log();
+} else {
+  main(port, (err, _port) => {
+    if (isVerbose) {
+      if (err) {
+        console.log(`get available port failed with ${err}`);
+      }
+
+      if (port !== _port) {
+        console.log(`port ${port} was occupied`);
+      }
+
+      console.log(`get available port ${_port}`);
+    } else {
+      console.log(_port || port);
+    }
+  });
+}