fix: restore --legacy-watch

Pass the `usePolling` flag to Chokidar when in legacy mode, which is supposed to/hopefully fix containers watching network attached drives.

Fixes #639
Fixes #633

lib/cli/parse.js

@@ -131,6 +131,10 @@ function nodemonOption(options, arg, eatNext) {
     options.verbose = true;
   } else
 
+  if (arg === '--legacy-watch' || arg === '-L') {
+    options.legacyWatch = true;
+  } else
+
   // Depricated as this is "on" by default
   if (arg === '--js') {
     options.js = true;

lib/config/load.js

@@ -136,8 +136,6 @@ function normaliseRules(options, ready) {
   options.watch = rules.rules.watch;
   options.ignore = rules.rules.ignore;
 
-  debug('final rules', options);
-
   ready(options);
 }
 

lib/monitor/watch.js

@@ -52,6 +52,7 @@ function watch() {
       var watcher = chokidar.watch(dir, {
         ignored: ignored,
         persistent: true,
+        usePolling: config.options.legacyWatch || false,
       });
 
       var total = 0;

test/cli/parse.test.js

@@ -39,7 +39,7 @@ describe('nodemon CLI parser', function () {
     var settings = parse(asCLI('--debug'));
     var cmd = commandToString(command(settings));
     process.chdir(cwd);
-    assert(cmd === 'node --debug ./bin/www')
+    assert(cmd === 'node --debug ./bin/www');
   });
 
   it('should replace {{filename}}', function () {

test/monitor/match.test.js

@@ -344,6 +344,7 @@ describe('match rule parser', function () {
 describe('watcher', function () {
   afterEach(function () {
     watch.resetWatchers();
+    config.reset();
   });
 
   it('should match a dotfile if explicitly asked to', function (done) {