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# vim: fileencoding=utf-8
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#
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from .base_format import Format
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from calculate.utils.files import Process
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from calculate.templates.format.base_format import FormatError
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from ..template_engine import ParametersContainer, Variables
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from ...variables.datavars import NamespaceNode
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from ...variables.loader import Datavars
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from typing import Union
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from os import path
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class PatchFormat(Format):
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FORMAT = 'patch'
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EXECUTABLE = True
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def __init__(self, patch_text: str,
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template_path: str,
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parameters: ParametersContainer,
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datavars: Union[Datavars, NamespaceNode, Variables]):
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self._patch_text = patch_text
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self._cwd_path = '/'
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self._last_level = 0
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# Измененные файлы.
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self.changed_files = dict()
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# Предупреждения.
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self._warnings: list = []
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def execute_format(self, target_path, chroot_path='/'):
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'''Метод для запуска работы формата.'''
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self._cwd_path = target_path
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if not path.isdir(self._cwd_path):
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# Если target_path -- путь к файлу, запускаем все процессы из
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# директории, в которой этот файл находится.
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self._cwd_path = path.dirname(self._cwd_path)
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if not path.exists(self._cwd_path):
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raise FormatError('root path does not exist', executable=True)
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if self._patch_text:
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self._patch_document()
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return self.changed_files
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else:
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raise FormatError('empty patch file', executable=True)
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def _patch_document(self):
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'''Метод, производящий наложение патча путем запуска процесса patch.'''
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# Сначала определяем на каком уровне накладываем патч.
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# Для этого запускаем утилиту patch с --dry-run и смотрим результат
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# выполнения.
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for level in range(0, 4):
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patch_dry_run = Process('patch', '--dry-run',
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'-p{}'.format(level),
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cwd=self._cwd_path)
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patch_dry_run.write(self._patch_text)
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if patch_dry_run.success():
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break
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patch_dry_run = Process('patch', '-R', '--dry-run',
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'-p{}'.format(level),
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cwd=self._cwd_path)
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patch_dry_run.write(self._patch_text)
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if patch_dry_run.success():
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return ''
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else:
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raise FormatError('correction failed', executable=True)
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self._last_level = level
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patch_run = Process('patch', '-p{}'.format(level),
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cwd=self._cwd_path)
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patch_run.write(self._patch_text)
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if patch_run.success():
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for line in patch_run.read_lines():
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if line.startswith('patching file'):
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changed_file_path = path.join(self._cwd_path,
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line[13:].strip())
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if path.exists(changed_file_path):
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self.changed_files.update({changed_file_path:
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'C'})
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else:
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self.changed_files.update({changed_file_path:
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'D'})
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return patch_run.read()
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else:
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return ''
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def __bool__(self):
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return bool(self._patch_text)
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@property
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def warnings(self):
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return self._warnings
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