104 lines
3.0 KiB
Python
104 lines
3.0 KiB
Python
# © 2020 James R. Barlow: github.com/jbarlow83
|
|
#
|
|
# This Source Code Form is subject to the terms of the Mozilla Public
|
|
# License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
# file, You can obtain one at http://mozilla.org/MPL/2.0/.
|
|
|
|
|
|
import argparse
|
|
import importlib
|
|
import importlib.util
|
|
import sys
|
|
from functools import partial
|
|
from pathlib import Path
|
|
from typing import Callable, List, Tuple, Union
|
|
|
|
import pluggy
|
|
|
|
from ocrmypdf import pluginspec
|
|
from ocrmypdf.cli import get_parser, plugins_only_parser
|
|
|
|
|
|
class OcrmypdfPluginManager(pluggy.PluginManager):
|
|
"""pluggy.PluginManager that can fork.
|
|
|
|
Capable of reconstructing itself in child workers.
|
|
|
|
Arguments:
|
|
setup_func: callback that initializes the plugin manager with all
|
|
standard plugins
|
|
"""
|
|
|
|
def __init__(
|
|
self, *args, setup_func: Callable[[pluggy.PluginManager], None], **kwargs
|
|
):
|
|
self._init_args = args
|
|
self._setup_func = setup_func
|
|
self._init_kwargs = kwargs
|
|
super().__init__(*args, **kwargs)
|
|
setup_func(self)
|
|
|
|
def __getstate__(self):
|
|
state = dict(
|
|
_init_args=self._init_args,
|
|
_setup_func=self._setup_func,
|
|
_init_kwargs=self._init_kwargs,
|
|
)
|
|
return state
|
|
|
|
def __setstate__(self, state):
|
|
self.__init__(
|
|
*state['_init_args'],
|
|
setup_func=state['_setup_func'],
|
|
**state['_init_kwargs'],
|
|
)
|
|
|
|
|
|
def _setup_plugins(
|
|
pm: pluggy.PluginManager, plugins: List[Union[str, Path]], builtins: bool = True
|
|
):
|
|
pm.add_hookspecs(pluginspec)
|
|
|
|
all_plugins: List[Union[str, Path]] = []
|
|
if builtins:
|
|
all_plugins.extend(
|
|
[
|
|
'ocrmypdf.builtin_plugins.ghostscript',
|
|
'ocrmypdf.builtin_plugins.tesseract_ocr',
|
|
]
|
|
)
|
|
all_plugins.extend(plugins)
|
|
for name in all_plugins:
|
|
if isinstance(name, Path) or name.endswith('.py'):
|
|
# Import by filename
|
|
module_name = Path(name).stem
|
|
spec = importlib.util.spec_from_file_location(module_name, name)
|
|
module = importlib.util.module_from_spec(spec)
|
|
sys.modules[module_name] = module
|
|
spec.loader.exec_module(module)
|
|
else:
|
|
# Import by dotted module name
|
|
module = importlib.import_module(name)
|
|
pm.register(module)
|
|
|
|
|
|
def get_plugin_manager(plugins: List[Union[str, Path]], builtins=True):
|
|
pm = OcrmypdfPluginManager(
|
|
project_name='ocrmypdf',
|
|
setup_func=partial(_setup_plugins, plugins=plugins, builtins=builtins),
|
|
)
|
|
return pm
|
|
|
|
|
|
def get_parser_options_plugins(
|
|
args,
|
|
) -> Tuple[argparse.ArgumentParser, argparse.Namespace, pluggy.PluginManager]:
|
|
pre_options, _unused = plugins_only_parser.parse_known_args(args=args)
|
|
plugin_manager = get_plugin_manager(pre_options.plugins)
|
|
|
|
parser = get_parser()
|
|
plugin_manager.hook.add_options(parser=parser) # pylint: disable=no-member
|
|
|
|
options = parser.parse_args(args=args)
|
|
return parser, options, plugin_manager
|