config: Allow specifying configfile location from command line

docs/Installation.md

@@ -38,3 +38,6 @@ python virtual environment at ${HOME}/.KlipperScreen-env and install a systemd
 service file.
 
 As an option to do development or interact with KlipperScreen from your computer, you may install tigervnc-scraping-server and VNC to your pi instance. Follow tigervnc server setup procedures for details on how to do that.
+
+If you need a custom location for the configuration file, you can add -c or --configfile to the systemd file and specify
+the location of your configuration file.

docs/changelog.md

@@ -1,5 +1,8 @@
 ## Changelog
 
+#### 2020 12 16
+* Config file can now be specified when running from the command line
+
 #### 2020 12 09
 * Z value in job status now reflects the gcode Z value. This allows people with ABL to have a better understanding of Z
 

ks_includes/config.py

@@ -16,10 +16,10 @@ class KlipperScreenConfig:
     config = None
     configfile_name = "KlipperScreen.conf"
 
-    def __init__(self):
+    def __init__(self, configfile):
         self.default_config_path = "%s/ks_includes/%s" % (os.getcwd(), self.configfile_name)
         self.config = configparser.ConfigParser()
-        self.config_path = self.get_config_file_location()
+        self.config_path = self.get_config_file_location(configfile)
 
         try:
             self.config.read(self.default_config_path)
@@ -32,8 +32,7 @@ class KlipperScreenConfig:
         self.get_menu_items("__main")
         #self.build_main_menu(self.config)
 
-    def get_config_file_location(self):
-        file = "%s/%s" % (os.getenv("HOME"), self.configfile_name)
+    def get_config_file_location(self, file):
         if not path.exists(file):
             file = "%s/%s" % (os.getcwd(), self.configfile_name)
             if not path.exists(file):

screen.py

@@ -1,5 +1,6 @@
 #!/usr/bin/python
 
+import argparse
 import gi
 import gettext
 import time
@@ -65,7 +66,17 @@ class KlipperScreen(Gtk.Window):
     def __init__(self):
         self.version = get_software_version()
         logger.info("KlipperScreen version: %s" % self.version)
-        self._config = KlipperScreenConfig()
+
+        parser = argparse.ArgumentParser(description="KlipperScreen - A GUI for Klipper")
+        parser.add_argument(
+            "-c","--configfile", default="~/KlipperScreen.conf", metavar='<configfile>',
+            help="Location of KlipperScreen configuration file"
+        )
+        args = parser.parse_args()
+        configfile = os.path.normpath(os.path.expanduser(args.configfile))
+
+
+        self._config = KlipperScreenConfig(configfile)
         self.printer = Printer({
             "software_version": "Unknown"
         }, {