Merge pull request #149 from maxlath/master

addin a --save-pid <path> option

README.md

@@ -42,6 +42,9 @@ clean up all the inter-module references, and without a whole new
         The executable that runs the specified program.
         Default is 'node'
 
+      -pid|--save-pid <path>
+        Save supervisor's process id to a file at the given path.
+
       --debug
         Start node with --debug flag.
 

lib/supervisor.js

@@ -14,7 +14,7 @@ var log = console.log;
 exports.run = run;
 
 function run (args) {
-  var arg, next, watch, ignore, program, extensions, executor, poll_interval, debugFlag, debugBrkFlag, debugBrkFlagArg, harmony;
+  var arg, next, watch, ignore, pidFilePath, program, extensions, executor, poll_interval, debugFlag, debugBrkFlag, debugBrkFlagArg, harmony;
   while (arg = args.shift()) {
     if (arg === "--help" || arg === "-h" || arg === "-?") {
       return help();
@@ -29,6 +29,8 @@ function run (args) {
       watch = args.shift();
     } else if (arg === "--ignore" || arg === "-i") {
       ignore = args.shift();
+    } else if (arg === "--save-pid" || arg === "-pid") {
+      pidFilePath = args.shift();
     } else if (arg === "--poll-interval" || arg === "-p") {
       poll_interval = parseInt(args.shift());
     } else if (arg === "--extensions" || arg === "-e") {
@@ -96,6 +98,12 @@ function run (args) {
     // coffee does not understand debug or debug-brk, make coffee pass options to node
     program.unshift("--nodejs")
   }
+  if (pidFilePath) {
+    var pid = process.pid;
+    fs.writeFileSync(pidFilePath, pid + '\n');
+  }
+
+  var deletePidFile = function(){ fs.unlinkSync(pidFilePath); };
 
   try {
     // Pass kill signals through to child
@@ -106,6 +114,9 @@ function run (args) {
           log("Sending "+signal+" to child...");
           child.kill(signal);
         }
+        if (pidFilePath){
+          deletePidFile();
+        }
         process.exit();
       });
     });
@@ -121,6 +132,9 @@ function run (args) {
   if (ignore) {
     log("  --ignore '" + ignore + "'");
   }
+  if (pidFilePath){
+    log("  --save-pid '" + pidFilePath + "'");
+  }
   log("  --extensions '" + extensions + "'");
   log("  --exec '" + executor + "'");
   log("");