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tiramisu-cmdline-parser
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update README.md

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Emmanuel Garette 2018-12-01 08:28:35 +01:00
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138
README.md
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@ -1,60 +1,140 @@
# tiramisu-parser
# tiramisu-cmdline-parser
Python3 parser for command-line options and arguments using Tiramisu engine.
# simple example
# example
Let us start with a simple example
```python
#!/usr/bin/env python3
from tiramisu_cmdline_parser import TiramisuCmdlineParser
from tiramisu import StrOption, BoolOption, SymLinkOption, OptionDescription, \
Config
parser = TiramisuCmdlineParser()
from tiramisu import IntOption, StrOption, BoolOption, ChoiceOption, \
SymLinkOption, OptionDescription, Config
# build a Config with:
# * a choice for select a sub argument (str, list, int)
choiceoption = ChoiceOption('cmd',
'choice the sub argument',
('str', 'list', 'int'),
properties=('mandatory',
'positional'))
# * a boolean to pass script in verbosity mode with argument -v --verbosity
booloption = BoolOption('verbosity',
'increase output verbosity',
default=False)
config = Config(OptionDescription('root', 'root', [StrOption('var',
'a string option',
properties=('mandatory',
'positional')),
short_booloption = SymLinkOption('v', booloption)
# * a string option if cmd is 'str'
str_ = StrOption('str',
'string option',
properties=('mandatory',),
requires=[{'option': choiceoption,
'expected': 'str',
'action': 'disabled',
'inverse': True}])
# * a list of strings option if cmd is 'list'
list_ = StrOption('list',
'list string option',
multi=True,
properties=('mandatory',),
requires=[{'option': choiceoption,
'expected': 'list',
'action': 'disabled',
'inverse': True}])
# * an integer option if cmd is 'int'
int_ = IntOption('int',
'int option',
properties=('mandatory',),
requires=[{'option': choiceoption,
'expected': 'int',
'action': 'disabled',
'inverse': True}])
config = Config(OptionDescription('root',
'root',
[choiceoption,
booloption,
SymLinkOption('v', booloption)]))
short_booloption,
str_,
list_,
int_
]))
# initialise the parser
parser = TiramisuCmdlineParser()
# add the config to parser
parser.add_arguments(config)
# parse arguments of current script
parser.parse_args()
print('result:', config.value.dict())
# now, print the result
print('result:')
config.property.read_only()
for key, value in config.value.dict().items():
print('- {} ({}): {}'.format(key,
config.option(key).option.doc(),
value))
```
Let's print help:
```bash
[gnunux@localhost tiramisu-parser]$ ./prog.py -h
usage: prog.py [-h] [-v] var
[gnunux@localhost tiramisu-parser]$ python3 prog.py str -h
usage: prog.py [-h] [-v] --str STR --list LIST [LIST ...] --int INT
{str,list,int}
positional arguments:
var a string option
{str,list,int} choice the sub argument
optional arguments:
-h, --help show this help message and exit
-v, --verbosity increase output verbosity
--str STR string option
--list LIST [LIST ...]
list string option
--int INT int option
```
The positional argument 'cmd' is mandatory:
```bash
[gnunux@localhost tiramisu-parser]$ python3 prog.py
usage: prog.py [-h] [-v] --str STR --list LIST [LIST ...] --int INT
{str,list,int}
prog.py: error: the following arguments are required: cmd
```
If 'cmd' is 'str', --str become mandatory:
```bash
[gnunux@localhost tiramisu-parser]$ python3 prog.py str
usage: prog.py [-h] [-v] --str STR --list LIST [LIST ...] --int INT
{str,list,int}
prog.py: error: the following arguments are required: --str
```
With all mandatories arguments:
```bash
[gnunux@localhost tiramisu-parser]$ python3 prog.py str --str value
result:
- cmd (choice the sub argument): str
- verbosity (increase output verbosity): False
- v (increase output verbosity): False
- str (string option): value
```
```bash
[gnunux@localhost tiramisu-parser]$ ./prog.py -v
usage: prog.py [-h] [-v] var
prog.py: error: the following arguments are required: var
[gnunux@localhost tiramisu-parser]$ python3 prog.py int --int 3
result:
- cmd (choice the sub argument): int
- verbosity (increase output verbosity): False
- v (increase output verbosity): False
- int (int option): 3
```
```bash
[gnunux@localhost tiramisu-parser]$ ./prog.py test
result: {'var': 'test', 'verbosity': False, 'v': False}
```
```bash
[gnunux@localhost tiramisu-parser]$ ./prog.py -v test
result: {'var': 'test', 'verbosity': True, 'v': True}
```
```bash
[gnunux@localhost tiramisu-parser]$ ./prog.py --verbosity test
result: {'var': 'test', 'verbosity': True, 'v': True}
[gnunux@localhost tiramisu-parser]$ python3 prog.py list --list a b c
result:
- cmd (choice the sub argument): list
- verbosity (increase output verbosity): False
- v (increase output verbosity): False
- list (list string option): ['a', 'b', 'c']
```

12
test/test_simple.py
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@ -22,7 +22,7 @@ for test in listdir(DATA_DIR):
TEST_DIRS.sort()
# TEST_DIRS.remove('test/data/compare/10_positional_list')
# TEST_DIRS = ['test/data/compare/50_conditional_disable']
# TEST_DIRS = ['test/data/compare/10_positional_list']
@fixture(scope="module", params=TEST_DIRS)
@ -76,6 +76,15 @@ def test_files(test_list):
['bar', '--verbosity'], ['--verbosity', 'bar'],
]
for arg in args:
# FIXME unknown argument is check before mandatory
if test_list == 'test/data/compare/10_positional_list':
check = False
for subarg in arg:
if not subarg.startswith('-'):
check = True
break
if not check:
continue
tiramparser = TiramisuCmdlineParser('prog.py')
tiramparser_dict, tiramparser_system_err, tiramparser_error, tiramparser_help = import_subfile_and_test(test_list + '/tiramisu.py',
tiramparser, arg)
@ -83,6 +92,7 @@ def test_files(test_list):
argparser = ArgumentParser('prog.py')
argparser_dict, argparser_system_err, argparser_error, argparser_help = import_subfile_and_test(test_list + '/argparse.py',
argparser, arg)
# print('===>', test_list, arg)
# print(tiramparser_dict)
# print(tiramparser_system_err)
# print(tiramparser_error)

66
tiramisu_cmdline_parser.py
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@ -23,12 +23,14 @@ from tiramisu.error import PropertiesOptionError
class TiramisuNamespace(Namespace):
def _populate(self):
self._config.property.read_only()
for tiramisu_key, tiramisu_value in self._config.value.dict().items():
option = self._config.option(tiramisu_key)
if not isinstance(option.option.get(), SymLinkOption):
if tiramisu_value == [] and option.option.ismulti() and option.owner.isdefault():
tiramisu_value = None
super().__setattr__(tiramisu_key, tiramisu_value)
self._config.property.read_write()
def __init__(self, config):
self._config = config
@ -46,9 +48,7 @@ class TiramisuNamespace(Namespace):
def __getattribute__(self, key):
if key == '__dict__' and hasattr(self, '_config'):
self._config.property.read_only()
self._populate()
self._config.property.read_write()
return super().__getattribute__(key)
@ -77,16 +77,13 @@ class TiramisuCmdlineParser(ArgumentParser):
else:
raise NotImplementedError('do not use add_argument')
def add_arguments(self, tiramisu: Union[Config, Option, List[Option], OptionDescription]) -> None:
if not isinstance(tiramisu, Config):
if not isinstance(tiramisu, OptionDescription):
if isinstance(tiramisu, Option):
tiramisu = [tiramisu]
tiramisu = OptionDescription('root', 'root', tiramisu)
tiramisu = Config(tiramisu)
self.config = tiramisu
def add_subparsers(self, *args, **kwargs):
raise NotImplementedError('do not use add_subparsers')
def _config_to_argparser(self,
_forhelp: bool):
actions = {}
for obj in tiramisu.unrestraint.option.list():
for obj in self.config.unrestraint.option.list():
if obj.option.properties(only_raises=True) or 'frozen' in obj.option.properties():
continue
option = obj.option
@ -108,7 +105,7 @@ class TiramisuCmdlineParser(ArgumentParser):
args = [self.prefix_chars + name]
else:
args = [self.prefix_chars * 2 + name]
if 'mandatory' in properties:
if _forhelp and 'mandatory' in properties:
kwargs['required'] = True
if isinstance(tiramisu_option, BoolOption):
if 'mandatory' in properties:
@ -126,7 +123,7 @@ class TiramisuCmdlineParser(ArgumentParser):
#kwargs['action'] = 'store_const'
kwargs['nargs'] = '?'
if option.ismulti():
if 'mandatory' in properties:
if _forhelp and 'mandatory' in properties:
kwargs['nargs'] = '+'
else:
kwargs['nargs'] = '*'
@ -147,19 +144,50 @@ class TiramisuCmdlineParser(ArgumentParser):
for args, kwargs in actions.values():
super().add_argument(*args, **kwargs)
def add_arguments(self,
tiramisu: Union[Config, Option, List[Option], OptionDescription],
_forhelp: bool=False) -> None:
if not isinstance(tiramisu, Config):
if not isinstance(tiramisu, OptionDescription):
if isinstance(tiramisu, Option):
tiramisu = [tiramisu]
tiramisu = OptionDescription('root', 'root', tiramisu)
tiramisu = Config(tiramisu)
self.config = tiramisu
self._config_to_argparser(_forhelp)
def parse_args(self, *args, **kwargs):
kwargs['namespace'] = TiramisuNamespace(self.config)
try:
namespaces = super().parse_args(*args, **kwargs)
try:
del namespaces.__dict__['_config']
except PropertiesOptionError as err:
# import traceback
# traceback.print_exc()
if err.proptype == ('mandatory',):
self.error('the following arguments are required: {}'.format(err._option_bag.option.impl_getname()))
if err.proptype == ['mandatory']:
name = err._option_bag.option.impl_getname()
properties = self.config.option(name).property.get()
if 'positional' not in properties:
if len(name) == 1 and 'longargument' not in properties:
name = self.prefix_chars + name
else:
name = self.prefix_chars * 2 + name
self.error('the following arguments are required: {}'.format(name))
else:
self.error('unexpected error: {}'.format(err))
del namespaces.__dict__['_config']
return namespaces
def format_usage(self, *args, _forhelp=False, **kwargs):
if _forhelp:
return super().format_usage(*args, **kwargs)
help_formatter = TiramisuCmdlineParser(self.prog)
help_formatter.add_arguments(self.config, _forhelp=True)
return help_formatter.format_usage(*args, **kwargs, _forhelp=True)
def format_help(self, *args, _forhelp=False, **kwargs):
if _forhelp:
return super().format_help(*args, **kwargs)
help_formatter = TiramisuCmdlineParser(self.prog)
help_formatter.add_arguments(self.config, _forhelp=True)
return help_formatter.format_help(*args, **kwargs, _forhelp=True)
def get_config(self):
return self.config