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372 lines
18 KiB
372 lines
18 KiB
3 years ago
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#!/usr/bin/env python
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# encoding: utf-8
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import sys
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from Naked.settings import debug as DEBUG_FLAG
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#####################################################################
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# [ Command class ]
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# Command line command string object
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# argv = list of command line arguments and options
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# argc = count of command line arguments and options
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# arg0 = first positional argument to command
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# arg1 = second positional argument to command
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# arglp = last positional argument to command
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# cmd = primary command for command suite application (=arg0)
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# cmd2 = secondary command for command suite application (=arg1)
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# snippet for py block comment = #py + TAB
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#####################################################################
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class Command:
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def __init__(self, app_path, argv):
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self.argobj = Argument(argv) # create an Argument obj
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self.optobj = Option(argv) # create an Option obj
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self.app = app_path # path to application executable file
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self.argv = argv # list of the command arguments argv[0] is first argument
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self.argc = len(argv) # length of the argument list
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self.arg0 = self.argobj._getArg(0) # define the first positional argument
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self.arg1 = self.argobj._getArg(1) # define the second positional argument
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self.arg2 = self.argobj._getArg(2) # define the third postitional argument
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self.arg3 = self.argobj._getArg(3) # define the fourth positional argument
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self.arg4 = self.argobj._getArg(4) # define the fifth positional argument
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self.arglp = self.argobj._getArg(len(argv) - 1) # define the last positional argument
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self.first = self.arg0
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self.second = self.arg1
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self.third = self.arg2
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self.fourth = self.arg3
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self.fifth = self.arg4
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self.last = self.arglp
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self.arg_to_exec = self.arg0 # argument to the executable
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self.arg_to_cmd = self.arg1 # argument to the primary command
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self.cmd = self.arg0 # define the primary command variable as the first positional argument (user dependent & optional, may be something else)
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self.cmd2 = self.arg1 # define the secondary command variable as the second positional argument (user dependent & optional, may be something else)
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self.options = self.option_exists() # test for presence of at least one option (boolean)
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self.flags = self.flag_exists() # test for presence of at least one flag (boolean)
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#------------------------------------------------------------------------------
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# [ app_validates_args method ] (boolean)
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# Test whether app validates on the criterion arguments (argc) > 0, i.e. there is at least one argument to the executable
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#------------------------------------------------------------------------------
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def app_validates_args(self):
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try:
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if self.argc > 0:
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return True
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else:
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return False
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except Exception as e:
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if DEBUG_FLAG:
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sys.stderr.write("Naked Framework Error: Validation of application error in the app_validates() method (Naked.commandline.py).")
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raise e
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#------------------------------------------------------------------------------------------
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# [ arg method ] (string)
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# Return the NEXT positional argument to a command line object (e.g. an option that requires an argument)
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# arg_recipient = the positional argument (at position n) to test for next positional argument
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# returns next positional argument string at position n + 1
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#------------------------------------------------------------------------------------------
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def arg(self, arg_recipient):
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try:
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recipient_position = self.argobj._getArgPosition(arg_recipient)
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return self.argobj._getArgNext(recipient_position)
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except Exception as e:
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if DEBUG_FLAG:
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sys.stderr.write("Naked Framework Error: Error parsing argument with arg() method (Naked.commandline.py).")
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raise e
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#------------------------------------------------------------------------------------------
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# [ command method ] (boolean)
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# Test that the command includes requested primary command suite command (cmd_str parameter)
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# cmd_str = the command string to test for in command
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# arugment_required = boolean - is an argument to this command required (default = no)?
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# returns boolean for presence of the cmd_str
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#------------------------------------------------------------------------------------------
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def command(self, cmd_str):
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try:
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if (cmd_str == self.cmd):
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return True
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else:
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return False # if command is missing, return false
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except Exception as e:
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if DEBUG_FLAG:
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sys.stderr.write("Naked Framework Error: Error parsing command with command() method (Naked.commandline.py).")
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raise e
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#------------------------------------------------------------------------------
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# [ command_arg method ] (string)
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# Return the argument to the primary command as a string
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#------------------------------------------------------------------------------
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def command_arg(self):
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try:
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return self.arg1
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except Exception as e:
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if DEBUG_FLAG:
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sys.stderr.write("Naked Framework Error: Error parsing command argument with command_arg() method (Naked.commandline.py).")
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raise e
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#------------------------------------------------------------------------------
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# [ command2_arg method ] (string)
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# Return the argument to the secondary command as a string
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#------------------------------------------------------------------------------
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def command2_arg(self):
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try:
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return self.arg2
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except Exception as e:
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if DEBUG_FLAG:
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sys.stderr.write("Naked Framework Error: Error parsing command argument with command_arg() method (Naked.commandline.py).")
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raise e
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#------------------------------------------------------------------------------------------
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# [ command_with_argument method ] (boolean)
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# Test that the command includes requested primary command suite command (cmd_str parameter) and argument to it
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# cmd_str = the command string to test for in command
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# returns boolean for presence of the cmd_str AND presence of argument to the command
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#------------------------------------------------------------------------------------------
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def command_with_argument(self, cmd_str):
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try:
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if (cmd_str == self.cmd):
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argument_to_cmd = self.argobj._getArgNext(0)
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if argument_to_cmd == "": # if the argument is missing, then return false
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return False
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else:
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return True
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else:
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return False # if command is missing return false
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except Exception as e:
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if DEBUG_FLAG:
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sys.stderr.write("Naked Framework Error: Error parsing command and argument with command_with_argument() method (Naked.commandline.py).")
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raise e
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#------------------------------------------------------------------------------------------
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# [ command_suite_validates method ] (boolean)
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# Test that there is a primary command in a command suite application (to be used at the top level of logic for command line application)
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# returns boolean for presence of the primary command
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#------------------------------------------------------------------------------------------
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def command_suite_validates(self, accept_options_as_argument = True):
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try:
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if self.argc > 0:
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if self.arg0.startswith("-") and accept_options_as_argument == False:
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return False # if no command and option present, return False
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else:
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return True # if a primary command present, return True
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else:
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return False # if user only entered the application name, return False
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except Exception as e:
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if DEBUG_FLAG:
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sys.stderr.write("Naked Framework Error: Command suite validation error with the command_suite_validation() method (Naked.commandline.py).")
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raise e
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#------------------------------------------------------------------------------
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# [ flag method ] (boolean)
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# Test for presence of flag in the command
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#------------------------------------------------------------------------------
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def flag(self, flag_string):
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try:
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for match_string in self.optobj: #iterate through the options and attempt to match beginning of option to the requested flag
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if match_string.startswith(flag_string):
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return True
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else:
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pass
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return False
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except Exception as e:
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if DEBUG_FLAG:
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sys.stderr.write("Naked Framework Error: Error parsing flags with the flag() method (Naked.commandline.py).")
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raise e
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#------------------------------------------------------------------------------
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# [flag_arg method] (string)
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# Return the argument string assigned to a flag
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#------------------------------------------------------------------------------
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def flag_arg(self, flag_string):
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try:
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for match_string in self.optobj:
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if match_string.startswith(flag_string) and '=' in match_string:
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flag_list = match_string.split("=") #split the flag on the equal symbol = list with [option, argument]
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return flag_list[1] #return the argument to the flag option
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else:
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pass
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return "" # return an empty string if unable to parse the argument
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except Exception as e:
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if DEBUG_FLAG:
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sys.stderr.write("Naked Framework Error: Error parsing flags with the flag_arg() method (Naked.commandline.py).")
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raise e
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#------------------------------------------------------------------------------
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# [ flag_exists method ] (boolean)
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# Test for the presence of a flag style option (--flag=argument) in the command
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#------------------------------------------------------------------------------
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def flag_exists(self):
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try:
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for item in self.optobj:
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if '=' in item: #test for presence of an = symbol in the option
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return True # if present return True
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break
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return False # if didn't match across all options, return False
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except Exception as e:
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if DEBUG_FLAG:
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sys.stderr.write("Naked Framework Error: Error parsing flags with the flag_arg() method (Naked.commandline.py).")
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raise e
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#------------------------------------------------------------------------------------------
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# [ option method ] (boolean)
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# Test that the command includes an option (option_string parameter)
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# option_string = the option string to test for in the command
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# arugment_required = boolean - is an argument to this option required (default = no)?
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# returns boolean for presence of the cmd_str
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#------------------------------------------------------------------------------------------
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def option(self, option_string, argument_required = False):
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try:
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if (option_string in self.optobj):
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argument_to_option = self.argobj._getArgNext(self.argobj._getArgPosition(option_string))
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if argument_required and ( argument_to_option == "" or argument_to_option.startswith("-") ):
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return False
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else:
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return True
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else:
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return False
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except Exception as e:
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if DEBUG_FLAG:
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sys.stderr.write("Naked Framework Error: Error parsing option with option() method (Naked.commandline.py).")
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raise e
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#------------------------------------------------------------------------------
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# [ option_arg method ] (string)
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# Return the argument string to an option
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#------------------------------------------------------------------------------
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def option_arg(self, option_string):
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try:
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return self.argobj._getArgNext(self.argobj._getArgPosition(option_string))
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except Exception as e:
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if DEBUG_FLAG:
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sys.stderr.write("Naked Framework Error: Error returning argument to option with option_arg() method (Naked.commandline.py).")
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raise e
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#------------------------------------------------------------------------------------------
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# [ option_with_arg method ] (boolean)
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# Test that the command includes an option (option_string parameter) and argument to that option
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# option_string = the option string to test for in the command
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# arugment_required = boolean - is an argument to this option required (default = yes)?
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# returns boolean for presence of the option_string AND the argument
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#------------------------------------------------------------------------------------------
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# test that command includes an option (option_string parameter) that includes an argument (=option(option_string, True))
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def option_with_arg(self, option_string, argument_required = True):
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try:
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if (option_string in self.optobj):
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argument_to_option = self.argobj._getArgNext(self.argobj._getArgPosition(option_string))
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if argument_required and ( argument_to_option == "" or argument_to_option.startswith("-") ):
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return False # argument is either missing or is another option, return false
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else:
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return True
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else:
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return False # option is not present
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except Exception as e:
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if DEBUG_FLAG:
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sys.stderr.write("Naked Framework Error: Error parsing option and argument with option_with_arg() method (Naked.commandline.py).")
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raise e
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#------------------------------------------------------------------------------
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# [ option_exists method ] (boolean)
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# Test whether there are any options in the command string
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# returns boolean value for test "Is there at least one option?"
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#------------------------------------------------------------------------------
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def option_exists(self):
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try:
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if len(self.optobj) > 0:
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return True
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else:
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return False
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except Exception as e:
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if DEBUG_FLAG:
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sys.stderr.write("Naked Framework Error: Error testing for the presence of at least one option with option_exists() method (Naked.commandline.py).")
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raise e
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#------------------------------------------------------------------------------
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# Naked provides the following commands for all applications that use the framework:
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# -- help
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# -- usage
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# -- version
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# These methods are accessed from the app.py module, main() as method calls on the command line object
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# Parsing logic is coded below
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#------------------------------------------------------------------------------
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#------------------------------------------------------------------------------
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# Help Command/Option Handler
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#------------------------------------------------------------------------------
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def help(self):
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if ( (self.option("--help")) or (self.cmd == "help") or (self.option("-h")) ):
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return True
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else:
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return False
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#------------------------------------------------------------------------------
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# Usage Command/Option Handler
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#------------------------------------------------------------------------------
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def usage(self):
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if ( (self.option("--usage")) or (self.cmd == "usage") ):
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return True
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else:
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return False
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#------------------------------------------------------------------------------
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# Version Command/Option Handler
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#------------------------------------------------------------------------------
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def version(self):
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if ( (self.option("--version")) or (self.cmd == "version") or (self.option("-v"))):
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return True
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else:
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return False
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#------------------------------------------------------------------------------
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# print the arguments with their corresponding argv list position to std out
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#------------------------------------------------------------------------------
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def show_args(self):
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x = 0
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for arg in self.argv:
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print("argv[" + str(x) + "] = " + arg)
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x = x + 1
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#------------------------------------------------------------------------------
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# [ Argument Class ]
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# all command line arguments (object inherited from Python list)
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#------------------------------------------------------------------------------
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class Argument(list):
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def __init__(self, argv):
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self.argv = argv
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list.__init__(self, self.argv)
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# return argument at position specified by the 'position' parameter
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def _getArg(self, position):
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if ( self.argv ) and ( len(self.argv) > position ):
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return self.argv[position]
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else:
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return ""
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# return position of user specified argument in the argument list
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def _getArgPosition(self, test_arg):
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if ( self.argv ):
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if test_arg in self.argv:
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return self.argv.index(test_arg)
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else:
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return -1
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# return the argument at the next position following a user specified positional argument (e.g. for argument to an option in cmd)
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def _getArgNext(self, position):
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if len(self.argv) > (position + 1):
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return self.argv[position + 1]
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else:
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return ""
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#------------------------------------------------------------------------------
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# [ Option Class ]
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# Command line options (object inherited from Python list)
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# Definition: string that begins with "-" (i.e. can be -h or --long)
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#------------------------------------------------------------------------------
|
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|
class Option(list):
|
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def __init__(self, argv):
|
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|
|
self.argv = argv
|
||
|
|
list.__init__(self, self._make_option_list())
|
||
|
|
|
||
|
|
# make a list of the options in the command (defined as anything that starts with "-" character)
|
||
|
|
def _make_option_list(self):
|
||
|
|
optargv = []
|
||
|
|
for x in self.argv:
|
||
|
|
if x.startswith("-"):
|
||
|
|
optargv.append(x)
|
||
|
|
return optargv
|