[CCSDK-28] populated the seed code for dgbuilder

[ccsdk/distribution.git] / dgbuilder / core_nodes / core / 75-exec.js

diff --git a/dgbuilder/core_nodes/core/75-exec.js b/dgbuilder/core_nodes/core/75-exec.js
new file mode 100644 (file)
index 0000000..a07b140
--- /dev/null
+++ b/dgbuilder/core_nodes/core/75-exec.js
@@ -0,0 +1,84 @@
+/**
+ * Copyright 2013 IBM Corp.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ **/
+
+module.exports = function(RED) {
+    "use strict";
+    var spawn = require('child_process').spawn;
+    var exec = require('child_process').exec;
+
+    function ExecNode(n) {
+        RED.nodes.createNode(this,n);
+        this.cmd = n.command.trim();
+        this.append = n.append.trim() || "";
+        this.useSpawn = n.useSpawn;
+
+        var node = this;
+        this.on("input", function(msg) {
+            node.status({fill:"blue",shape:"dot"});
+            if (this.useSpawn === true) {
+                // make the extra args into an array
+                // then prepend with the msg.payload
+                if (typeof(msg.payload !== "string")) { msg.payload = msg.payload.toString(); }
+                var arg = [];
+                if (node.append.length > 0) { arg = node.append.split(","); }
+                if (msg.payload.trim() !== "") { arg.unshift(msg.payload); }
+                node.log(node.cmd+" ["+arg+"]");
+                if (node.cmd.indexOf(" ") == -1) {
+                    var ex = spawn(node.cmd,arg);
+                    ex.stdout.on('data', function (data) {
+                        //console.log('[exec] stdout: ' + data);
+                        msg.payload = data.toString();
+                        node.send([msg,null,null]);
+                    });
+                    ex.stderr.on('data', function (data) {
+                        //console.log('[exec] stderr: ' + data);
+                        msg.payload = data.toString();
+                        node.send([null,msg,null]);
+                    });
+                    ex.on('close', function (code) {
+                        //console.log('[exec] result: ' + code);
+                        msg.payload = code;
+                        node.status({});
+                        node.send([null,null,msg]);
+                    });
+                    ex.on('error', function (code) {
+                        node.warn(code);
+                    });
+                }
+                else { node.error("Spawn command must be just the command - no spaces or extra parameters"); }
+            }
+            else {
+                var cl = node.cmd+" "+msg.payload+" "+node.append;
+                node.log(cl);
+                var child = exec(cl, function (error, stdout, stderr) {
+                    msg.payload = stdout;
+                    var msg2 = {payload:stderr};
+                    var msg3 = null;
+                    //console.log('[exec] stdout: ' + stdout);
+                    //console.log('[exec] stderr: ' + stderr);
+                    if (error !== null) {
+                        msg3 = {payload:error};
+                        //console.log('[exec] error: ' + error);
+                    }
+                    node.status({});
+                    node.send([msg,msg2,msg3]);
+                });
+            }
+        });
+    }
+
+    RED.nodes.registerType("exec",ExecNode);
+}