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node_modules/ping/lib/builder/linux.js

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+'use strict';
+
+/**
+ * A builder builds command line arguments for ping in linux environment
+ * @module lib/builder/linux
+ */
+var util = require('util');
+
+var builder = {};
+
+/**
+ * Cross platform config representation
+ * @typedef {Object} PingConfig
+ * @property {boolean} numeric - Map IP address to hostname or not
+ * @property {number} timeout - Time duration for ping command to exit
+ * @property {number} min_reply - Exit after sending number of ECHO_REQUEST
+ * @property {string[]} extra - Optional options does not provided
+ */
+
+var defaultConfig = {
+    numeric: true,
+    timeout: 2,
+    min_reply: 1,
+    extra: [],
+};
+
+/**
+ * Get the finalized array of command line arguments
+ * @param {string} target - hostname or ip address
+ * @param {PingConfig} [config] - Configuration object for cmd line argument
+ * @return {string[]} - Command line argument according to the configuration
+ */
+builder.getResult = function (target, config) {
+    var _config = config || {};
+
+    // Empty argument
+    var ret = [];
+
+    // Make every key in config has been setup properly
+    var keys = ['numeric', 'timeout', 'min_reply', 'extra'];
+    keys.forEach(function (k) {
+        // Falsy value will be overrided without below checking
+        if (typeof(_config[k]) !== 'boolean') {
+            _config[k] = _config[k] || defaultConfig[k];
+        }
+    });
+
+    if (_config.numeric) {
+        ret.push('-n');
+    }
+
+    if (_config.timeout) {
+        ret = ret.concat([
+            '-w',
+            util.format('%d', _config.timeout),
+        ]);
+    }
+
+    if (_config.min_reply) {
+        ret = ret.concat([
+            '-c',
+            util.format('%d', _config.min_reply),
+        ]);
+    }
+
+    if (_config.extra) {
+        ret = ret.concat(_config.extra);
+    }
+
+    ret.push(target);
+
+    return ret;
+};
+
+module.exports = builder;