A supervisor program for running nodejs programs. 

A supervisor program for running nodejs programs

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supervisor

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var spawn = require("child_process").spawn;

    var arg, next, watch, ignore, pidFilePath, program, extensions, executor, poll_interval, debugFlag, debugBrkFlag, debugBrkFlagArg, harmony;

        if (arg === "--help" || arg === "-h" || arg === "-?") {

        } else if (arg === "--quiet" || arg === "-q") {

        } else if (arg === "--harmony") {

        } else if (arg === "--harmony_default_parameters") {

            harmony_default_parameters = true;

        } else if (arg === "--harmony_destructuring") {

            harmony_destructuring = true;

        } else if (arg === "--verbose" || arg === "-V") {

        } else if (arg === "--restart-verbose" || arg === "-RV") {

        } else if (arg === "--watch" || arg === "-w") {

        } else if (arg == "--non-interactive" || arg === "-t") {

        } else if (arg === "--ignore" || arg === "-i") {

        } else if (arg === "--save-pid" || arg === "-pid") {

        } else if (arg === "--ignore-symlinks") {

        } else if (arg === "--poll-interval" || arg === "-p") {

            poll_interval = parseInt(args.shift());

        } else if (arg === "--extensions" || arg === "-e") {

        } else if (arg === "--exec" || arg === "-x") {

        } else if (arg === "--no-restart-on" || arg === "-n") {

        } else if (arg.indexOf("--debug") > -1 && arg.indexOf('--debug-brk') === -1) {

        } else if (arg.indexOf('--debug-brk')>=0) {

        } else if (arg === "--force-watch") {

        } else if (arg === "--instant-kill" || arg === "-k") {

        } else if (arg === "--timestamp" || arg === "-s") {

        } else if (arg[0] != "-" && !args.length) {

            // Assume last arg is the program

    var programExt = program.join(" ").match(/.*\.(\S*)/);

    programExt = programExt && programExt[1];

        // If no extensions passed try to guess from the program

        if (programExt && extensions.indexOf(programExt) == -1) {

            // Support coffee and litcoffee extensions

            if(programExt === "coffee" || programExt === "litcoffee") {

                extensions += ",coffee,litcoffee";

                extensions += "," + programExt;

    fileExtensionPattern = new RegExp("^.*\.(" + extensions.replace(/,/g, "|") + ")$");

        executor = (programExt === "coffee" || programExt === "litcoffee") ? "coffee" : "node";

        program.unshift(debugBrkFlagArg);

        program.unshift("--harmony_default_parameters");

        program.unshift("--harmony_destructuring");

    if (executor === "coffee" && (debugFlag || debugBrkFlag)) {

        // coffee does not understand debug or debug-brk, make coffee pass options to node

        // verify if we have write access

        canWrite(pidFilePath, function(err) {

                fs.writeFileSync(pidFilePath, pid + '\n');

        fs.exists(pidFilePath, function (exists) {

                log("Removing pid file");

                fs.unlinkSync(pidFilePath);

                log("No pid file to remove...");

        // Pass kill signals through to child

        [ "SIGTERM", "SIGINT", "SIGHUP", "SIGQUIT" ].forEach( function(signal) {

            process.on(signal, function () {

                var child = exports.child;

                    log("Received "+signal+", killing child process...");

        // Windows doesn't support signals yet, so they simply don't get this handling.

        // https://github.com/joyent/node/issues/1553

            log("Parent process exiting, terminating child...");

    log("  program '" + program.join(" ") + "'");

        log("  --ignore '" + ignore + "'");

        log("  --save-pid '" + pidFilePath + "'");

    log("  --extensions '" + extensions + "'");

    // store the call to startProgramm in startChildProcess

    startChildProcess = function() { startProgram(program, executor); };

    // if we have a program, then run it, and restart when it crashes.

    // if we have a watch folder, then watch the folder for changes and restart the prog

    // If interaction has not been disabled, start the CLI

        stdin.on('readable', function() {

            var chunk = process.stdin.read();

            // Restart process when user inputs rs

            if (chunk !== null && chunk === "rs\n") {

                //      process.stdout.write('data: ' + chunk);

    ("    Log timestamp after each run.")

    ("    Make it easy to tell when the task last ran.")

    ("    Display these usage instructions.")

    ("     Useful for restarting supervisor eaven if no file has changed.")

    ("  supervisor -w scripts -e myext -x myrunner myapp")

    ("  supervisor -- server.js -h host -p port")

    log("Starting child process with '" + exec + " " + prog.join(" ") + "'");

    var child = exports.child = spawn(exec, prog, {stdio: 'inherit'});

    // On Windows 8.1, spawn can't launch apps without the .cmd extention

    // If already retried, let the app crash ... :'(

    if (process.platform === "win32" && exec.indexOf('.cmd') == -1) {

        child.on('error', function (err) {

                return startProgram(prog, exec + ".cmd");

        // node < 0.8 doesn't understand the 'inherit' option, so pass through manually

        child.stdout.addListener("data", function (chunk) { chunk && console.log(chunk); });

        child.stderr.addListener("data", function (chunk) { chunk && console.error(chunk); });

    child.addListener("exit", function (code) {

            log("Program " + exec + " " + prog.join(" ") + " exited with code " + code + "\n");

            if (noRestartOn == "exit" || noRestartOn == "error" && code !== 0 || noRestartOn == "success" && code === 0) return;

    // use console.log() directly rather than log() so that -q/--quiet

		@@ -14,2 +14,3 @@ var fs = require("fs");
		var instantKillFlag = false;
		var timestampFlag = false;
		var interactive = true;
		@@ -19,2 +20,3 @@ var log = console.log;
		var harmony_default_parameters = false;
		var harmony_destructuring = false;

		@@ -35,2 +37,4 @@ exports.run = run;
		harmony_default_parameters = true;
		} else if (arg === "--harmony_destructuring") {
		harmony_destructuring = true;
		} else if (arg === "--verbose" \|\| arg === "-V") {
		@@ -67,2 +71,4 @@ verbose = true;
		instantKillFlag = true;
		} else if (arg === "--timestamp" \|\| arg === "-s") {
		timestampFlag = true;
		} else if (arg === "--") {
		@@ -119,2 +125,5 @@ program = args;
		}
		if (harmony_destructuring) {
		program.unshift("--harmony_destructuring");
		}
		if (executor === "coffee" && (debugFlag \|\| debugBrkFlag)) {
		@@ -324,2 +333,6 @@ // coffee does not understand debug or debug-brk, make coffee pass options to node
		("")
		(" -s\|--timestamp")
		(" Log timestamp after each run.")
		(" Make it easy to tell when the task last ran.")
		("")
		(" -h\|--help\|-?")
		@@ -365,2 +378,4 @@ (" Display these usage instructions.")
		child.addListener("exit", function (code) {
		logTimestamp();

		if (!crash_queued) {
		@@ -375,2 +390,10 @@ log("Program " + exec + " " + prog.join(" ") + " exited with code " + code + "\n");

		function logTimestamp() {
		if (timestampFlag) {
		// use console.log() directly rather than log() so that -q/--quiet
		// does not override/silence it
		console.log(Date().toString());
		}
		}

		function crash () {
		@@ -377,0 +400,0 @@

		{
		"name": "supervisor",
		"version": "0.10.0",
		"version": "0.11.0",
		"description": "A supervisor program for running nodejs programs",
		@@ -56,3 +56,3 @@ "author": "Isaac Z. Schlueter <i@izs.me>",
		"nodeunit": "~0.9.0"
		}
		}
		}

		@@ -35,3 +35,7 @@ # node-supervisor
		Ignore symlinks :)


		-s\|--timestamp
		Log timestamp after each run.
		Make it easy to tell when the task last ran.

		-p\|--poll-interval <milliseconds>
		@@ -38,0 +42,0 @@ How often to poll watched files for changes.

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