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'''Bash utility functions.'''
from . import shell
def make_option_variable_name(option, prefix=''):
'''Make a variable for an option.'''
long_options = option.get_long_option_strings()
if long_options:
return prefix + shell.make_identifier(long_options[0].lstrip('-'))
old_options = option.get_old_option_strings()
if old_options:
return prefix + shell.make_identifier(old_options[0].lstrip('-'))
short_options = option.get_short_option_strings()
if short_options:
return prefix + short_options[0][1]
raise AssertionError("make_option_variable_name: Should not be reached")
class VariableManager:
'''Variable manager.'''
def __init__(self, prefix):
self.prefix = prefix
self.variables = set()
def make_variable(self, option):
'''Make a variable for an option.'''
var = make_option_variable_name(option, self.prefix)
self.variables.add(var)
return var
def capture_variable(self, option):
if option.capture is None:
option.capture = self.make_variable(option)
return option.capture
def get_variables(self):
'''Get a list of all defined variables.'''
return list(sorted(self.variables))
class CasePatterns:
'''Functions for creating case patterns.'''
@staticmethod
def for_long_without_arg(option_strings):
'''Return a case pattern for long options that don't take an argument.'''
return '|'.join(option_strings)
@staticmethod
def for_long_with_arg(option_strings):
'''Return a case pattern for long options that take an argument.'''
return '|'.join(f'{o}=*' for o in option_strings)
@staticmethod
def for_short(option_strings):
'''Return a case pattern for short options.'''
return '|'.join(o[1] for o in option_strings)
@staticmethod
def for_old_without_arg(option_strings):
'''Return a case pattern for old options that don't take an argument.'''
if len(option_strings) <= 2:
return '|'.join(option_strings)
return '-@(%s)' % '|'.join(o.lstrip('-') for o in option_strings)
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