Initial commit

1 files changed, 541 insertions, 0 deletions

diff --git a/node_modules/nodemon/lib/monitor/run.js b/node_modules/nodemon/lib/monitor/run.js
new file mode 100644
index 0000000..36a4864
--- /dev/null
+++ b/node_modules/nodemon/lib/monitor/run.js
@@ -0,0 +1,541 @@
+var debug = require('debug')('nodemon:run');
+const statSync = require('fs').statSync;
+var utils = require('../utils');
+var bus = utils.bus;
+var childProcess = require('child_process');
+var spawn = childProcess.spawn;
+var exec = childProcess.exec;
+var execSync = childProcess.execSync;
+var fork = childProcess.fork;
+var watch = require('./watch').watch;
+var config = require('../config');
+var child = null; // the actual child process we spawn
+var killedAfterChange = false;
+var noop = () => {};
+var restart = null;
+var psTree = require('pstree.remy');
+var path = require('path');
+var signals = require('./signals');
+const osRelease = parseInt(require('os').release().split('.')[0], 10);
+
+function run(options) {
+  var cmd = config.command.raw;
+  // moved up
+  // we need restart function below in the global scope for run.kill
+  /*jshint validthis:true*/
+  restart = run.bind(this, options);
+  run.restart = restart;
+
+  // binding options with instance of run
+  // so that we can use it in run.kill
+  run.options = options;
+
+  var runCmd = !options.runOnChangeOnly || config.lastStarted !== 0;
+  if (runCmd) {
+    utils.log.status('starting `' + config.command.string + '`');
+  } else {
+    // should just watch file if command is not to be run
+    // had another alternate approach
+    // to stop process being forked/spawned in the below code
+    // but this approach does early exit and makes code cleaner
+    debug('start watch on: %s', config.options.watch);
+    if (config.options.watch !== false) {
+      watch();
+      return;
+    }
+  }
+
+  config.lastStarted = Date.now();
+
+  var stdio = ['pipe', 'pipe', 'pipe'];
+
+  if (config.options.stdout) {
+    stdio = ['pipe', process.stdout, process.stderr];
+  }
+
+  if (config.options.stdin === false) {
+    stdio = [process.stdin, process.stdout, process.stderr];
+  }
+
+  var sh = 'sh';
+  var shFlag = '-c';
+
+  const binPath = process.cwd() + '/node_modules/.bin';
+
+  const spawnOptions = {
+    env: Object.assign({}, process.env, options.execOptions.env, {
+      PATH: binPath + ':' + process.env.PATH,
+    }),
+    stdio: stdio,
+  };
+
+  var executable = cmd.executable;
+
+  if (utils.isWindows) {
+    // if the exec includes a forward slash, reverse it for windows compat
+    // but *only* apply to the first command, and none of the arguments.
+    // ref #1251 and #1236
+    if (executable.indexOf('/') !== -1) {
+      executable = executable
+        .split(' ')
+        .map((e, i) => {
+          if (i === 0) {
+            return path.normalize(e);
+          }
+          return e;
+        })
+        .join(' ');
+    }
+    // taken from npm's cli: https://git.io/vNFD4
+    sh = process.env.comspec || 'cmd';
+    shFlag = '/d /s /c';
+    spawnOptions.windowsVerbatimArguments = true;
+  }
+
+  var args = runCmd ? utils.stringify(executable, cmd.args) : ':';
+  var spawnArgs = [sh, [shFlag, args], spawnOptions];
+
+  const firstArg = cmd.args[0] || '';
+
+  var inBinPath = false;
+  try {
+    inBinPath = statSync(`${binPath}/${executable}`).isFile();
+  } catch (e) {}
+
+  // hasStdio allows us to correctly handle stdin piping
+  // see: https://git.io/vNtX3
+  const hasStdio = utils.satisfies('>= 6.4.0 || < 5');
+
+  // forking helps with sub-process handling and tends to clean up better
+  // than spawning, but it should only be used under specific conditions
+  const shouldFork =
+    !config.options.spawn &&
+    !inBinPath &&
+    !(firstArg.indexOf('-') === 0) && // don't fork if there's a node exec arg
+    firstArg !== 'inspect' && // don't fork it's `inspect` debugger
+    executable === 'node' && // only fork if node
+    utils.version.major > 4; // only fork if node version > 4
+
+  if (shouldFork) {
+    // this assumes the first argument is the script and slices it out, since
+    // we're forking
+    var forkArgs = cmd.args.slice(1);
+    var env = utils.merge(options.execOptions.env, process.env);
+    stdio.push('ipc');
+    child = fork(options.execOptions.script, forkArgs, {
+      env: env,
+      stdio: stdio,
+      silent: !hasStdio,
+    });
+    utils.log.detail('forking');
+    debug('fork', sh, shFlag, args);
+  } else {
+    utils.log.detail('spawning');
+    child = spawn.apply(null, spawnArgs);
+    debug('spawn', sh, shFlag, args);
+  }
+
+  if (config.required) {
+    var emit = {
+      stdout: function (data) {
+        bus.emit('stdout', data);
+      },
+      stderr: function (data) {
+        bus.emit('stderr', data);
+      },
+    };
+
+    // now work out what to bind to...
+    if (config.options.stdout) {
+      child.on('stdout', emit.stdout).on('stderr', emit.stderr);
+    } else {
+      child.stdout.on('data', emit.stdout);
+      child.stderr.on('data', emit.stderr);
+
+      bus.stdout = child.stdout;
+      bus.stderr = child.stderr;
+    }
+
+    if (shouldFork) {
+      child.on('message', function (message, sendHandle) {
+        bus.emit('message', message, sendHandle);
+      });
+    }
+  }
+
+  bus.emit('start');
+
+  utils.log.detail('child pid: ' + child.pid);
+
+  child.on('error', function (error) {
+    bus.emit('error', error);
+    if (error.code === 'ENOENT') {
+      utils.log.error('unable to run executable: "' + cmd.executable + '"');
+      process.exit(1);
+    } else {
+      utils.log.error('failed to start child process: ' + error.code);
+      throw error;
+    }
+  });
+
+  child.on('exit', function (code, signal) {
+    if (child && child.stdin) {
+      process.stdin.unpipe(child.stdin);
+    }
+
+    if (code === 127) {
+      utils.log.error(
+        'failed to start process, "' + cmd.executable + '" exec not found'
+      );
+      bus.emit('error', code);
+      process.exit();
+    }
+
+    // If the command failed with code 2, it may or may not be a syntax error
+    // See: http://git.io/fNOAR
+    // We will only assume a parse error, if the child failed quickly
+    if (code === 2 && Date.now() < config.lastStarted + 500) {
+      utils.log.error('process failed, unhandled exit code (2)');
+      utils.log.error('');
+      utils.log.error('Either the command has a syntax error,');
+      utils.log.error('or it is exiting with reserved code 2.');
+      utils.log.error('');
+      utils.log.error('To keep nodemon running even after a code 2,');
+      utils.log.error('add this to the end of your command: || exit 1');
+      utils.log.error('');
+      utils.log.error('Read more here: https://git.io/fNOAG');
+      utils.log.error('');
+      utils.log.error('nodemon will stop now so that you can fix the command.');
+      utils.log.error('');
+      bus.emit('error', code);
+      process.exit();
+    }
+
+    // In case we killed the app ourselves, set the signal thusly
+    if (killedAfterChange) {
+      killedAfterChange = false;
+      signal = config.signal;
+    }
+    // this is nasty, but it gives it windows support
+    if (utils.isWindows && signal === 'SIGTERM') {
+      signal = config.signal;
+    }
+
+    if (signal === config.signal || code === 0) {
+      // this was a clean exit, so emit exit, rather than crash
+      debug('bus.emit(exit) via ' + config.signal);
+      bus.emit('exit', signal);
+
+      // exit the monitor, but do it gracefully
+      if (signal === config.signal) {
+        return restart();
+      }
+
+      if (code === 0) {
+        // clean exit - wait until file change to restart
+        if (runCmd) {
+          utils.log.status('clean exit - waiting for changes before restart');
+        }
+        child = null;
+      }
+    } else {
+      bus.emit('crash');
+      if (options.exitcrash) {
+        utils.log.fail('app crashed');
+        if (!config.required) {
+          process.exit(1);
+        }
+      } else {
+        utils.log.fail(
+          'app crashed - waiting for file changes before' + ' starting...'
+        );
+        child = null;
+      }
+    }
+
+    if (config.options.restartable) {
+      // stdin needs to kick in again to be able to listen to the
+      // restart command
+      process.stdin.resume();
+    }
+  });
+
+  // moved the run.kill outside to handle both the cases
+  // intial start
+  // no start
+
+  // connect stdin to the child process (options.stdin is on by default)
+  if (options.stdin) {
+    process.stdin.resume();
+    // FIXME decide whether or not we need to decide the encoding
+    // process.stdin.setEncoding('utf8');
+
+    // swallow the stdin error if it happens
+    // ref: https://github.com/remy/nodemon/issues/1195
+    if (hasStdio) {
+      child.stdin.on('error', () => {});
+      process.stdin.pipe(child.stdin);
+    } else {
+      if (child.stdout) {
+        child.stdout.pipe(process.stdout);
+      } else {
+        utils.log.error(
+          'running an unsupported version of node ' + process.version
+        );
+        utils.log.error(
+          'nodemon may not work as expected - ' +
+            'please consider upgrading to LTS'
+        );
+      }
+    }
+
+    bus.once('exit', function () {
+      if (child && process.stdin.unpipe) {
+        // node > 0.8
+        process.stdin.unpipe(child.stdin);
+      }
+    });
+  }
+
+  debug('start watch on: %s', config.options.watch);
+  if (config.options.watch !== false) {
+    watch();
+  }
+}
+
+function waitForSubProcesses(pid, callback) {
+  debug('checking ps tree for pids of ' + pid);
+  psTree(pid, (err, pids) => {
+    if (!pids.length) {
+      return callback();
+    }
+
+    utils.log.status(
+      `still waiting for ${pids.length} sub-process${
+        pids.length > 2 ? 'es' : ''
+      } to finish...`
+    );
+    setTimeout(() => waitForSubProcesses(pid, callback), 1000);
+  });
+}
+
+function kill(child, signal, callback) {
+  if (!callback) {
+    callback = noop;
+  }
+
+  if (utils.isWindows) {
+    const taskKill = () => {
+      try {
+        exec('taskkill /pid ' + child.pid + ' /T /F');
+      } catch (e) {
+        utils.log.error('Could not shutdown sub process cleanly');
+      }
+    };
+
+    // We are handling a 'SIGKILL' , 'SIGUSR2' and 'SIGUSR1' POSIX signal under Windows the
+    // same way it is handled on a UNIX system: We are performing
+    // a hard shutdown without waiting for the process to clean-up.
+    if (signal === 'SIGKILL' || osRelease < 10 || signal === 'SIGUSR2' || signal==="SIGUSR1" ) {
+      debug('terminating process group by force: %s', child.pid);
+
+      // We are using the taskkill utility to terminate the whole
+      // process group ('/t') of the child ('/pid') by force ('/f').
+      // We need to end all sub processes, because the 'child'
+      // process in this context is actually a cmd.exe wrapper.
+      taskKill();
+      callback();
+      return;
+    }
+
+    try {
+      // We are using the Windows Management Instrumentation Command-line
+      // (wmic.exe) to resolve the sub-child process identifier, because the
+      // 'child' process in this context is actually a cmd.exe wrapper.
+      // We want to send the termination signal directly to the node process.
+      // The '2> nul' silences the no process found error message.
+      const resultBuffer = execSync(
+        `wmic process where (ParentProcessId=${child.pid}) get ProcessId 2> nul`
+      );
+      const result = resultBuffer.toString().match(/^[0-9]+/m);
+
+      // If there is no sub-child process we fall back to the child process.
+      const processId = Array.isArray(result) ? result[0] : child.pid;
+
+      debug('sending kill signal SIGINT to process: %s', processId);
+
+      // We are using the standalone 'windows-kill' executable to send the
+      // standard POSIX signal 'SIGINT' to the node process. This fixes #1720.
+      const windowsKill = path.normalize(
+        `${__dirname}/../../bin/windows-kill.exe`
+      );
+
+      // We have to detach the 'windows-kill' execution completely from this
+      // process group to avoid terminating the nodemon process itself.
+      // See: https://github.com/alirdn/windows-kill#how-it-works--limitations
+      //
+      // Therefore we are using 'start' to create a new cmd.exe context.
+      // The '/min' option hides the new terminal window and the '/wait'
+      // option lets the process wait for the command to finish.
+
+      execSync(
+        `start "windows-kill" /min /wait "${windowsKill}" -SIGINT ${processId}`
+      );
+    } catch (e) {
+      taskKill();
+    }
+    callback();
+  } else {
+    // we use psTree to kill the full subtree of nodemon, because when
+    // spawning processes like `coffee` under the `--debug` flag, it'll spawn
+    // it's own child, and that can't be killed by nodemon, so psTree gives us
+    // an array of PIDs that have spawned under nodemon, and we send each the
+    // configured signal (default: SIGUSR2) signal, which fixes #335
+    // note that psTree also works if `ps` is missing by looking in /proc
+    let sig = signal.replace('SIG', '');
+
+    psTree(child.pid, function (err, pids) {
+      // if ps isn't native to the OS, then we need to send the numeric value
+      // for the signal during the kill, `signals` is a lookup table for that.
+      if (!psTree.hasPS) {
+        sig = signals[signal];
+      }
+
+      // the sub processes need to be killed from smallest to largest
+      debug('sending kill signal to ' + pids.join(', '));
+
+      child.kill(signal);
+
+      pids.sort().forEach((pid) => exec(`kill -${sig} ${pid}`, noop));
+
+      waitForSubProcesses(child.pid, () => {
+        // finally kill the main user process
+        exec(`kill -${sig} ${child.pid}`, callback);
+      });
+    });
+  }
+}
+
+run.kill = function (noRestart, callback) {
+  // I hate code like this :(  - Remy (author of said code)
+  if (typeof noRestart === 'function') {
+    callback = noRestart;
+    noRestart = false;
+  }
+
+  if (!callback) {
+    callback = noop;
+  }
+
+  if (child !== null) {
+    // if the stdin piping is on, we need to unpipe, but also close stdin on
+    // the child, otherwise linux can throw EPIPE or ECONNRESET errors.
+    if (run.options.stdin) {
+      process.stdin.unpipe(child.stdin);
+    }
+
+    // For the on('exit', ...) handler above the following looks like a
+    // crash, so we set the killedAfterChange flag if a restart is planned
+    if (!noRestart) {
+      killedAfterChange = true;
+    }
+
+    /* Now kill the entire subtree of processes belonging to nodemon */
+    var oldPid = child.pid;
+    if (child) {
+      kill(child, config.signal, function () {
+        // this seems to fix the 0.11.x issue with the "rs" restart command,
+        // though I'm unsure why. it seems like more data is streamed in to
+        // stdin after we close.
+        if (child && run.options.stdin && child.stdin && oldPid === child.pid) {
+          child.stdin.end();
+        }
+        callback();
+      });
+    }
+  } else if (!noRestart) {
+    // if there's no child, then we need to manually start the process
+    // this is because as there was no child, the child.on('exit') event
+    // handler doesn't exist which would normally trigger the restart.
+    bus.once('start', callback);
+    run.restart();
+  } else {
+    callback();
+  }
+};
+
+run.restart = noop;
+
+bus.on('quit', function onQuit(code) {
+  if (code === undefined) {
+    code = 0;
+  }
+
+  // remove event listener
+  var exitTimer = null;
+  var exit = function () {
+    clearTimeout(exitTimer);
+    exit = noop; // null out in case of race condition
+    child = null;
+    if (!config.required) {
+      // Execute all other quit listeners.
+      bus.listeners('quit').forEach(function (listener) {
+        if (listener !== onQuit) {
+          listener();
+        }
+      });
+      process.exit(code);
+    } else {
+      bus.emit('exit');
+    }
+  };
+
+  // if we're not running already, don't bother with trying to kill
+  if (config.run === false) {
+    return exit();
+  }
+
+  // immediately try to stop any polling
+  config.run = false;
+
+  if (child) {
+    // give up waiting for the kids after 10 seconds
+    exitTimer = setTimeout(exit, 10 * 1000);
+    child.removeAllListeners('exit');
+    child.once('exit', exit);
+
+    kill(child, 'SIGINT');
+  } else {
+    exit();
+  }
+});
+
+bus.on('restart', function () {
+  // run.kill will send a SIGINT to the child process, which will cause it
+  // to terminate, which in turn uses the 'exit' event handler to restart
+  run.kill();
+});
+
+// remove the child file on exit
+process.on('exit', function () {
+  utils.log.detail('exiting');
+  if (child) {
+    child.kill();
+  }
+});
+
+// because windows borks when listening for the SIG* events
+if (!utils.isWindows) {
+  bus.once('boot', () => {
+    // usual suspect: ctrl+c exit
+    process.once('SIGINT', () => bus.emit('quit', 130));
+    process.once('SIGTERM', () => {
+      bus.emit('quit', 143);
+      if (child) {
+        child.kill('SIGTERM');
+      }
+    });
+  });
+}
+
+module.exports = run;