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autoprogram.py
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autoprogram.py
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"""
sphinxcontrib.autoprogram
~~~~~~~~~~~~~~~~~~~~~~~~~
Documenting CLI programs.
:copyright: Copyright 2014 by Hong Minhee
:license: BSD, see LICENSE for details.
"""
from __future__ import annotations
# pylint: disable=protected-access,missing-docstring
import argparse
import collections
import inspect
import os
import re
import sys
from typing import Any, Dict, Iterable, List, Optional, Tuple
import unittest
from unittest import mock
from docutils import nodes
from docutils.parsers.rst import Directive
from docutils.parsers.rst.directives import unchanged
from docutils.statemachine import StringList, ViewList
from six import exec_
from six.moves import builtins, reduce
from sphinx.domains import std
from sphinx.util.nodes import nested_parse_with_titles
__all__ = (
"AutoprogramDirective",
"AutoprogramDirectiveTestCase",
"ScannerTestCase",
"import_object",
"scan_programs",
"setup",
"suite",
)
def get_subparser_action(
parser: argparse.ArgumentParser,
) -> Optional[argparse._SubParsersAction]:
neg1_action = parser._actions[-1]
if isinstance(neg1_action, argparse._SubParsersAction):
return neg1_action
for a in parser._actions:
if isinstance(a, argparse._SubParsersAction):
return a
return None
def scan_programs(
parser: argparse.ArgumentParser,
command=[],
maxdepth: int = 0,
depth: int = 0,
groups: bool = False,
):
if maxdepth and depth >= maxdepth:
return
if groups:
yield command, [], parser
for group in parser._action_groups:
options = list(scan_options(group._group_actions))
if options:
yield command, options, group
else:
options = list(scan_options(parser._actions))
yield command, options, parser
if parser._subparsers:
choices: Iterable[Tuple[Any, Any]] = ()
subp_action = get_subparser_action(parser)
if subp_action:
choices = subp_action.choices.items()
if not (
hasattr(collections, "OrderedDict")
and isinstance(choices, collections.OrderedDict)
):
choices = sorted(choices, key=lambda pair: pair[0])
for cmd, sub in choices:
if isinstance(sub, argparse.ArgumentParser):
for program in scan_programs(sub, command + [cmd], maxdepth, depth + 1):
yield program
def scan_options(actions):
for arg in actions:
if not (arg.option_strings or isinstance(arg, argparse._SubParsersAction)):
yield format_positional_argument(arg)
for arg in actions:
if arg.option_strings and arg.help is not argparse.SUPPRESS:
yield format_option(arg)
def format_positional_argument(arg) -> Tuple[List[str], str]:
desc = (arg.help or "") % {"default": arg.default}
name = (arg.metavar or arg.dest).lower()
return [name], desc
def format_option(arg) -> Tuple[List[str], str]:
desc = (arg.help or "") % {"default": arg.default}
if not isinstance(arg, (argparse._StoreAction, argparse._AppendAction)):
names = list(arg.option_strings)
return names, desc
if arg.choices is not None:
value = "{{{0}}}".format(",".join(str(c) for c in arg.choices))
else:
metavar = arg.metavar or arg.dest
if not isinstance(metavar, tuple):
metavar = (metavar,)
value = "<{0}>".format("> <".join(metavar).lower())
names = [
"{0} {1}".format(option_string, value) for option_string in arg.option_strings
]
return names, desc
def import_object(import_name: str):
module_name, expr = import_name.split(":", 1)
try:
mod = __import__(module_name)
except ImportError:
# This happens if the file is a script with no .py extension. Here we
# trick autoprogram to load a module in memory with the contents of
# the script, if there is a script named module_name. Otherwise, raise
# an ImportError as it did before.
import glob
import sys
import os
import imp
for p in sys.path:
f = glob.glob(os.path.join(p, module_name))
if len(f) > 0:
with open(f[0]) as fobj:
codestring = fobj.read()
foo = imp.new_module("foo")
exec_(codestring, foo.__dict__)
sys.modules["foo"] = foo
mod = __import__("foo")
break
else:
raise
mod = reduce(getattr, module_name.split(".")[1:], mod)
globals_: Dict[str, Any] = builtins # type: ignore[assignment]
if not isinstance(globals_, dict):
globals_ = globals_.__dict__
return eval(expr, globals_, mod.__dict__)
class AutoprogramDirective(Directive):
has_content = False
required_arguments = 1
option_spec = {
"prog": unchanged,
"maxdepth": unchanged,
"start_command": unchanged,
"strip_usage": unchanged,
"no_usage_codeblock": unchanged,
"groups": unchanged,
}
def make_rst(self):
(import_name,) = self.arguments
parser = import_object(import_name or "__undefined__")
prog = self.options.get("prog")
if prog:
original_prog = parser.prog
parser.prog = prog
start_command = self.options.get("start_command", "").split(" ")
strip_usage = "strip_usage" in self.options
usage_codeblock = "no_usage_codeblock" not in self.options
maxdepth = int(self.options.get("maxdepth", 0))
groups = "groups" in self.options
if start_command[0] == "":
start_command.pop(0)
if start_command:
def get_start_cmd_parser(p):
looking_for = start_command.pop(0)
action = get_subparser_action(p)
if not action:
raise ValueError("No actions for command " + looking_for)
subp = action.choices[looking_for]
if start_command:
return get_start_cmd_parser(subp)
return subp
parser = get_start_cmd_parser(parser)
if prog and parser.prog.startswith(original_prog):
parser.prog = parser.prog.replace(original_prog, prog, 1)
for commands, options, group_or_parser in scan_programs(
parser, maxdepth=maxdepth, groups=groups
):
if isinstance(group_or_parser, argparse._ArgumentGroup):
title = group_or_parser.title
description = group_or_parser.description
usage = None
epilog = None
is_subgroup = True
is_program = False
else:
cmd_parser = group_or_parser
if prog and cmd_parser.prog.startswith(original_prog):
cmd_parser.prog = cmd_parser.prog.replace(original_prog, prog, 1)
title = cmd_parser.prog.rstrip()
description = cmd_parser.description
usage = cmd_parser.format_usage()
epilog = cmd_parser.epilog
is_subgroup = bool(commands)
is_program = True
for line in render_rst(
title,
options,
is_program=is_program,
is_subgroup=is_subgroup,
description=description,
usage=usage,
usage_strip=strip_usage,
usage_codeblock=usage_codeblock,
epilog=epilog,
):
yield line
def run(self):
node = nodes.section()
node.document = self.state.document
result = ViewList()
for line in self.make_rst():
result.append(line, "<autoprogram>")
nested_parse_with_titles(self.state, result, node)
return node.children
def render_rst(
title: str,
options,
is_program: bool,
is_subgroup: bool,
description: Optional[str],
usage: str,
usage_strip: bool,
usage_codeblock: bool,
epilog: Optional[str],
) -> Iterable[str]:
if usage_strip:
to_strip = title.rsplit(" ", 1)[0]
len_to_strip = len(to_strip) - 4
usage_lines = usage.splitlines()
usage = os.linesep.join(
[
usage_lines[0].replace(to_strip, "..."),
]
+ [line[len_to_strip:] for line in usage_lines[1:]]
)
yield ""
if is_program:
yield ".. program:: " + title
yield ""
yield title
yield ("!" if is_subgroup else "?") * len(title)
yield ""
for line in inspect.cleandoc(description or "").splitlines():
yield line
yield ""
if usage is None:
pass
elif usage_codeblock:
yield ".. code-block:: console"
yield ""
for usage_line in usage.splitlines():
yield " " + usage_line
else:
yield usage
yield ""
for option_strings, help_ in options:
yield ".. option:: {0}".format(", ".join(option_strings))
yield ""
yield " " + help_.replace("\n", " \n")
yield ""
for line in (epilog or "").splitlines():
yield line or ""
def patch_option_role_to_allow_argument_form() -> None:
"""Before Sphinx 1.2.2, :rst:dir:`.. option::` directive hadn't
allowed to not start with a dash or slash, so it hadn't been possible
to represent positional arguments (not options).
https://bitbucket.org/birkenfeld/sphinx/issue/1357/
It monkeypatches the :rst:dir:`.. option::` directive's behavior.
"""
std.option_desc_re = re.compile(r"((?:/|-|--)?[-_a-zA-Z0-9]+)(\s*.*)")
def setup(app) -> Dict[str, bool]:
app.add_directive("autoprogram", AutoprogramDirective)
patch_option_role_to_allow_argument_form()
return {
"parallel_read_safe": True,
"parallel_write_safe": True,
}
class ScannerTestCase(unittest.TestCase):
def test_simple_parser(self) -> None:
parser = argparse.ArgumentParser(description="Process some integers.")
parser.add_argument(
"integers",
metavar="N",
type=int,
nargs="*",
help="an integer for the accumulator",
)
parser.add_argument(
"-i",
"--identity",
type=int,
default=0,
help="the default result for no arguments " "(default: 0)",
)
parser.add_argument(
"--sum",
dest="accumulate",
action="store_const",
const=sum,
default=max,
help="sum the integers (default: find the max)",
)
parser.add_argument("--key-value", metavar=("KEY", "VALUE"), nargs=2)
parser.add_argument("--max", help=argparse.SUPPRESS) # must be opt-out
programs = scan_programs(parser)
programs = list(programs)
self.assertEqual(1, len(programs))
(parser_info,) = programs
program, options, cmd_parser = parser_info
self.assertEqual([], program)
self.assertEqual("Process some integers.", cmd_parser.description)
self.assertEqual(5, len(options))
self.assertEqual((["n"], "an integer for the accumulator"), options[0])
self.assertEqual(
(["-h", "--help"], "show this help message and exit"), options[1]
)
self.assertEqual(
(
["-i <identity>", "--identity <identity>"],
"the default result for no arguments (default: 0)",
),
options[2],
)
self.assertEqual(
(["--sum"], "sum the integers (default: find the max)"), options[3]
)
self.assertEqual(
(
[
"--key-value <key> <value>",
],
"",
),
options[4],
)
def test_subcommands(self) -> None:
parser = argparse.ArgumentParser(description="Process some integers.")
subparsers = parser.add_subparsers()
max_parser = subparsers.add_parser("max", description="Find the max.")
max_parser.set_defaults(accumulate=max)
max_parser.add_argument(
"integers",
metavar="N",
type=int,
nargs="+",
help="An integer for the accumulator.",
)
sum_parser = subparsers.add_parser("sum", description="Sum the integers.")
sum_parser.set_defaults(accumulate=sum)
sum_parser.add_argument(
"integers",
metavar="N",
type=int,
nargs="+",
help="An integer for the accumulator.",
)
programs = scan_programs(parser)
programs = list(programs)
self.assertEqual(3, len(programs))
# main
program, options, cmd_parser = programs[0]
self.assertEqual([], program)
self.assertEqual("Process some integers.", cmd_parser.description)
self.assertEqual(1, len(options))
self.assertEqual(
(["-h", "--help"], "show this help message and exit"), options[0]
)
# max
program, options, cmd_parser = programs[1]
self.assertEqual(["max"], program)
self.assertEqual("Find the max.", cmd_parser.description)
self.assertEqual(2, len(options))
self.assertEqual((["n"], "An integer for the accumulator."), options[0])
self.assertEqual(
(["-h", "--help"], "show this help message and exit"), options[1]
)
# sum
program, options, cmd_parser = programs[2]
self.assertEqual(["sum"], program)
self.assertEqual("Sum the integers.", cmd_parser.description)
self.assertEqual(2, len(options))
self.assertEqual((["n"], "An integer for the accumulator."), options[0])
def test_argument_groups(self) -> None:
parser = argparse.ArgumentParser(description="This is a program.")
parser.add_argument("-v", action="store_true", help="A global argument")
plain_group = parser.add_argument_group(
"Plain Options", description="This is a group."
)
plain_group.add_argument(
"--plain", action="store_true", help="A plain argument."
)
fancy_group = parser.add_argument_group(
"Fancy Options", description="Another group."
)
fancy_group.add_argument("fancy", type=int, help="Set the fancyness")
sections = list(scan_programs(parser, groups=True))
self.assertEqual(4, len(sections))
# section: unnamed
program, options, cmd_parser = sections[0]
self.assertEqual([], program)
self.assertEqual("This is a program.", cmd_parser.description)
self.assertEqual(0, len(options))
# section: default optionals
program, options, group = sections[1]
self.assertEqual([], program)
# See https://github.com/sphinx-contrib/autoprogram/issues/24
if sys.version_info >= (3, 10):
self.assertEqual('options', group.title)
else:
self.assertEqual('optional arguments', group.title)
self.assertEqual(None, group.description)
self.assertEqual(2, len(options))
self.assertEqual(
(["-h", "--help"], "show this help message and exit"), options[0]
)
self.assertEqual((["-v"], "A global argument"), options[1])
# section: Plain Options
program, options, group = sections[2]
self.assertEqual([], program)
self.assertEqual("Plain Options", group.title)
self.assertEqual("This is a group.", group.description)
self.assertEqual(1, len(options))
self.assertEqual((["--plain"], "A plain argument."), options[0])
# section: Fancy Options
program, options, group = sections[3]
self.assertEqual([], program)
self.assertEqual("Fancy Options", group.title)
self.assertEqual("Another group.", group.description)
self.assertEqual(1, len(options))
self.assertEqual((["fancy"], "Set the fancyness"), options[0])
def test_choices(self) -> None:
parser = argparse.ArgumentParser()
parser.add_argument("--awesomeness", choices=["meh", "awesome"])
_program, options, _cmd_parser = list(scan_programs(parser))[0]
log_option = options[1]
self.assertEqual((["--awesomeness {meh,awesome}"], ""), log_option)
def test_parse_epilog(self) -> None:
parser = argparse.ArgumentParser(
description="Process some integers.",
epilog="The integers will be processed.",
)
programs = scan_programs(parser)
programs = list(programs)
self.assertEqual(1, len(programs))
(parser_data,) = programs
_program, _options, cmd_parser = parser_data
self.assertEqual("The integers will be processed.", cmd_parser.epilog)
class AutoprogramDirectiveTestCase(unittest.TestCase):
def setUp(self) -> None:
self.untouched_sys_path = sys.path[:]
sample_prog_path = os.path.join(os.path.dirname(__file__), "..", "doc")
sys.path.insert(0, sample_prog_path)
self.directive = AutoprogramDirective(
"autoprogram",
["cli:parser"],
{"prog": "cli.py"},
StringList([], items=[]),
1,
0,
".. autoprogram:: cli:parser\n :prog: cli.py\n",
None,
mock.Mock(),
)
def tearDown(self) -> None:
sys.path[:] = self.untouched_sys_path
def test_make_rst(self) -> None:
self.assertEqual(
"\n".join(self.directive.make_rst()).strip(),
inspect.cleandoc(
"""
.. program:: cli.py
cli.py
??????
Process some integers.
.. code-block:: console
usage: cli.py [-h] [-i IDENTITY] [--sum] N [N ...]
.. option:: n
An integer for the accumulator.
.. option:: -h, --help
show this help message and exit
.. option:: -i <identity>, --identity <identity>
the default result for no arguments (default: 0)
.. option:: --sum
Sum the integers (default: find the max).
""").strip()
)
class UtilTestCase(unittest.TestCase):
def test_import_object(self) -> None:
cls = import_object("sphinxcontrib.autoprogram:UtilTestCase")
self.assertTrue(cls is UtilTestCase)
instance = import_object(
'sphinxcontrib.autoprogram:UtilTestCase("test_import_object")'
)
self.assertIsInstance(instance, UtilTestCase)
if not hasattr(unittest.TestCase, "assertIsInstance"):
def assertIsInstance(self, instance, cls) -> None: # type: ignore[override]
self.assertTrue(
isinstance(instance, cls),
"{0!r} is not an instance of {1.__module__}."
"{1.__name__}".format(instance, cls),
)
suite = unittest.TestSuite()
for test_case in ScannerTestCase, AutoprogramDirectiveTestCase, UtilTestCase:
suite.addTests(unittest.defaultTestLoader.loadTestsFromTestCase(test_case))