Only start one daemon

With a recent commit to import-js [1], we no longer require one daemon per
working directory. Instead the path to the file will be used to find a
project root that then serves as the working directory.

[1]: Galooshi/import-js@dcd41b2

import-js.py

@@ -6,7 +6,7 @@
 import subprocess
 
 import_js_environment = {}
-daemons = {}
+daemon = None
 
 
 def extract_path():
@@ -54,10 +54,10 @@ def plugin_loaded():
     print(import_js_environment)
 
 def plugin_unloaded():
-    global daemons
-    for cwd, daemon in daemons.items():
-        print('Stopping ImportJS daemon process for cwd ' + cwd)
-        daemon.terminate()
+    global daemon
+    print('Stopping ImportJS daemon process')
+    daemon.terminate()
+    daemon = None
 
 def no_executable_error(executable):
     return dedent('''
@@ -94,18 +94,18 @@ class ImportJsCommand(sublime_plugin.TextCommand):
     def project_root(self):
         return self.view.window().extract_variables()['folder']
 
-    def start_or_get_daemon(self, cwd):
-        global daemons
-        if (cwd in daemons):
-            return daemons[cwd]
+    def start_or_get_daemon(self):
+        global daemon
+        if (daemon != None):
+            return daemon
 
         is_windows = os.name == 'nt'
         executable = 'importjsd'
 
         try:
             daemon = subprocess.Popen(
                 [executable, 'start', '--parent-pid', str(os.getppid())],
-                cwd=cwd,
+                cwd=self.project_root(),
                 env=import_js_environment,
                 stdin=subprocess.PIPE,
                 stdout=subprocess.PIPE,
@@ -118,8 +118,6 @@ def start_or_get_daemon(self, cwd):
             # commands.
             daemon.stdout.readline()
 
-            daemons[cwd] = daemon
-
             return daemon
         except FileNotFoundError as e:
             if(e.strerror.find(executable) > -1):
@@ -153,7 +151,7 @@ def run(self, edit, **args):
 
 
         print(payload)
-        process = self.start_or_get_daemon(self.project_root())
+        process = self.start_or_get_daemon()
         process.stdin.write((json.dumps(payload) + '\n').encode('utf-8'))
         process.stdin.flush()
         resultJson = process.stdout.readline().decode('utf-8')