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'''Code for creating when conditions in Bash.'''
from . import when
from . import shell
def _generate_option_is(commandline, variable_manager, obj):
conditions = []
for o in commandline.get_options_by_option_strings(obj.options):
have_option = '(( ${#%s[@]} ))' % variable_manager.capture_variable(o)
value_equals = []
for value in obj.values:
value_equals.append('[[ "${%s[-1]}" == %s ]]' % (
variable_manager.capture_variable(o),
shell.escape(value)
))
if len(value_equals) == 1:
cond = '{ %s && %s; }' % (have_option, value_equals[0])
else:
cond = '{ %s && { %s; } }' % (have_option, ' || '.join(value_equals))
conditions.append(cond)
if len(conditions) == 1:
return conditions[0]
return '{ %s; }' % ' || '.join(conditions)
def _generate_has_option(commandline, variable_manager, obj):
conditions = []
for o in commandline.get_options_by_option_strings(obj.options):
cond = '(( ${#%s[@]} ))' % variable_manager.capture_variable(o)
conditions.append(cond)
if len(conditions) == 1:
return conditions[0]
return '{ %s; }' % ' || '.join(conditions)
def generate_when_conditions(commandline, variable_manager, when_):
'''Generate when condition code.'''
parsed = when.parse_when(when_)
if isinstance(parsed, when.OptionIs):
return _generate_option_is(commandline, variable_manager, parsed)
if isinstance(parsed, when.HasOption):
return _generate_has_option(commandline, variable_manager, parsed)
raise AssertionError('invalid instance of `parse`')
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