mirror of
https://github.com/avatao-content/baseimage-tutorial-framework
synced 2024-09-08 23:44:10 +00:00
77 lines
2.2 KiB
Python
77 lines
2.2 KiB
Python
# Copyright (C) 2018 Avatao.com Innovative Learning Kft.
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# All Rights Reserved. See LICENSE file for details.
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from subprocess import run
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from getpass import getuser
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class SnapshotProvider:
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def __init__(self, directory, git_dir):
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author = f'{getuser()} via TFW {self.__class__.__name__}'
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self.gitenv = {
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'GIT_DIR': git_dir,
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'GIT_WORK_TREE': directory,
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'GIT_AUTHOR_NAME': author,
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'GIT_AUTHOR_EMAIL': '',
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'GIT_COMMITTER_NAME': author,
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'GIT_COMMITTER_EMAIL': ''
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}
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self._head_detached = False
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self._branch = 'master'
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self._branches = [self._branch]
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self._init_repo()
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def _init_repo(self):
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self._run(('git', 'init'))
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def take_snapshot(self):
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if self._head_detached:
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self._checkout_branch_from_head()
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self._run(('git', 'add', '-A'))
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self._run(('git', 'commit', '-m', 'Snapshot'))
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def _checkout_branch_from_head(self):
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head_hash = self._get_head_hash()
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self._run((
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'git', 'checkout',
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'-b', head_hash, head_hash
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))
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self._branches.append(head_hash)
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self._branch = head_hash
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self._head_detached = False
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def _get_head_hash(self):
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return self._get_stdout(('git', 'rev-parse', 'HEAD'))
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def restore_snapshot(self, date):
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commit = self._get_commit_from_timestamp(date)
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self._checkout_commit(commit)
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self._head_detached = True
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def _get_commit_from_timestamp(self, date):
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return self._get_stdout((
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'git', 'rev-list',
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'--date=iso',
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'-n', '1',
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f'--before="{date.isoformat()}"',
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self._branch
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))
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def _checkout_commit(self, commit):
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self._run((
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'git', 'checkout',
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commit
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))
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def _get_stdout(self, *args, **kwargs):
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kwargs['capture_output'] = True
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stdout_bytes = self._run(*args, **kwargs).stdout
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return stdout_bytes.decode().rstrip('\n')
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def _run(self, *args, **kwargs):
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if 'env' not in kwargs:
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kwargs['env'] = self.gitenv
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return run(*args, **kwargs)
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