Get server resource independant of working directory

gns3server/crash_report.py

@@ -55,7 +55,7 @@ class CrashReport:
     DSN = "sync+https://9e6f04df72c74b6894a6dcd2928d069e:2035d1beb1654136b170f1e91f05ee51@app.getsentry.com/38482"
     if hasattr(sys, "frozen"):
         cacert = get_resource("cacert.pem")
-        if os.path.isfile(cacert):
+        if cacert is not None and os.path.isfile(cacert):
             DSN += "?ca_certs={}".format(cacert)
         else:
             log.warning("The SSL certificate bundle file '{}' could not be found".format(cacert))

gns3server/utils/get_resource.py

@@ -50,10 +50,10 @@ def get_resource(resource_name):
 
     resource_path = None
     if hasattr(sys, "frozen") and sys.platform.startswith("darwin"):
-        resource_name = os.path.join("../Resources", resource_name)
+        resource_name = os.path.join(os.path.dirname(sys.executable), "../Resources", resource_name)
     if hasattr(sys, "frozen") and os.path.exists(resource_name):
-        resource_path = os.path.normpath(os.path.join(os.getcwd(), resource_name))
-    elif not hasattr(sys, "frozen") and pkg_resources.resource_exists("gns3", resource_name):
-        resource_path = pkg_resources.resource_filename("gns3", resource_name)
+        resource_path = os.path.normpath(os.path.join(os.path.dirname(sys.executable), resource_name))
+    elif not hasattr(sys, "frozen") and pkg_resources.resource_exists("gns3server", resource_name):
+        resource_path = pkg_resources.resource_filename("gns3server", resource_name)
         resource_path = os.path.normpath(resource_path)
     return resource_path