mirror of https://github.com/Desuuuu/klipper.git
save_variables: Support saving variables to a disk file
Signed-off-by: Dushyant Ahuja dusht.ahuja@gmail.com Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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@ -396,3 +396,38 @@ gcode:
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```
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UPDATE_DELAYED_GCODE ID=report_temp DURATION=0
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```
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### Save Variables to disk
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If a
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[save_variables config section](Config_Reference.md#save_variables)
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has been enabled, `SAVE_VARIABLE VARIABLE=<name> VALUE=<value>` can be
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used to save the variable to disk so that it can be used across
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restarts. All stored variables are loaded into the
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`printer.save_variables.variables` dict at startup and can be used in
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gcode macros. to avoid overly long lines you can add the following at
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the top of the macro:
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```
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{% set svv = printer.save_variables.variables %}
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```
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As an example, it could be used to save the state of 2-in-1-out hotend
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and when starting a print ensure that the active extruder is used,
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instead of T0:
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```
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[gcode_macro T1]
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gcode:
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ACTIVATE_EXTRUDER extruder=extruder1
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SAVE_VARIABLE VARIABLE=currentextruder VALUE='"extruder1"'
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[gcode_macro T0]
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gcode:
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ACTIVATE_EXTRUDER extruder=extruder
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SAVE_VARIABLE VARIABLE=currentextruder VALUE='"extruder"'
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[gcode_macro START_GCODE]
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gcode:
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{% set svv = printer.save_variables.variables %}
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ACTIVATE_EXTRUDER extruder={svv.currentextruder}
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```
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@ -1182,6 +1182,20 @@ gcode:
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# Default is 0.
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```
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## [save_variables]
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Support saving variables to disk so that they are retained across
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restarts. See
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[command templates](Command_Templates.md#save-variables-to-disk) and
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[G-Code reference](G-Codes.md#save-variables) for further information.
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```
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[save_variables]
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filename:
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# Required - provide a filename that would be used to save the
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# variables to disk e.g. ~/variables.cfg
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```
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## [idle_timeout]
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Idle timeout. An idle timeout is automatically enabled - add an
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@ -647,6 +647,17 @@ been enabled (also see the
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for gcode execution. A value of 0 will cancel a pending delayed gcode
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from executing.
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## Save Variables
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The following command is enabled if a
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[save_variables config section](Config_Reference.md#save_variables)
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has been enabled:
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- `SAVE_VARIABLE VARIABLE=<name> VALUE=<value>`: Saves the variable to
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disk so that it can be used across restarts. All stored variables
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are loaded into the `printer.save_variables.variables` dict at
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startup and can be used in gcode macros. The provided VALUE is
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parsed as a Python literal.
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## Resonance compensation
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The following command is enabled if an
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@ -0,0 +1,63 @@
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# Save arbitrary variables so that values can be kept across restarts.
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#
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# Copyright (C) 2020 Dushyant Ahuja <dusht.ahuja@gmail.com>
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# Copyright (C) 2016-2020 Kevin O'Connor <kevin@koconnor.net>
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#
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# This file may be distributed under the terms of the GNU GPLv3 license.
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import os, logging, ast, ConfigParser
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class SaveVariables:
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def __init__(self, config):
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self.printer = config.get_printer()
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self.filename = os.path.expanduser(config.get('filename'))
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self.allVariables = {}
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try:
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self.loadVariables()
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except self.printer.command_error as e:
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raise config.error(str(e))
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gcode = self.printer.lookup_object('gcode')
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gcode.register_command('SAVE_VARIABLE', self.cmd_SAVE_VARIABLE,
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desc=self.cmd_SAVE_VARIABLE_help)
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def loadVariables(self):
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allvars = {}
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varfile = ConfigParser.ConfigParser()
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try:
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varfile.read(self.filename)
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if varfile.has_section('Variables'):
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for name, val in varfile.items('Variables'):
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allvars[name] = ast.literal_eval(val)
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except:
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msg = "Unable to parse existing variable file"
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logging.exception(msg)
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raise self.printer.command_error(msg)
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self.allVariables = allvars
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cmd_SAVE_VARIABLE_help = "Save arbitrary variables to disk"
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def cmd_SAVE_VARIABLE(self, gcmd):
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varname = gcmd.get('VARIABLE')
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value = gcmd.get('VALUE')
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try:
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value = ast.literal_eval(value)
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except ValueError as e:
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raise gcmd.error("Unable to parse '%s' as a literal" % (value,))
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newvars = dict(self.allVariables)
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newvars[varname] = value
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# Write file
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varfile = ConfigParser.ConfigParser()
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varfile.add_section('Variables')
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for name, val in sorted(newvars.items()):
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varfile.set('Variables', name, repr(val))
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try:
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f = open(self.filename, "w")
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varfile.write(f)
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f.close()
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except:
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msg = "Unable to save variable"
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logging.exception(msg)
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raise gcmd.error(msg)
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gcmd.respond_info("Variable Saved")
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self.loadVariables()
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def get_status(self, eventtime):
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return {'variables': dict(self.allVariables)}
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def load_config(config):
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return SaveVariables(config)
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