镜像自地址
https://github.com/tuna/tunasync.git
已同步 2025-12-08 15:36:47 +00:00
63 行
2.0 KiB
Python
63 行
2.0 KiB
Python
#!/usr/bin/env python2
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# -*- coding:utf-8 -*-
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import sh
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import os
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from datetime import datetime
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from .hook import JobHook
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class BtrfsVolumeError(Exception):
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pass
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class BtrfsHook(JobHook):
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def __init__(self, service_dir, working_dir, gc_dir):
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self.service_dir = service_dir
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self.working_dir = working_dir
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self.gc_dir = gc_dir
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def before_job(self, ctx={}, *args, **kwargs):
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self._create_working_snapshot()
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ctx['current_dir'] = self.working_dir
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def after_job(self, status=None, ctx={}, *args, **kwargs):
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if status == "success":
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self._commit_changes()
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ctx['current_dir'] = self.service_dir
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def _ensure_subvolume(self):
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# print(self.service_dir)
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try:
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ret = sh.btrfs("subvolume", "show", self.service_dir)
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except Exception, e:
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print(e)
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raise BtrfsVolumeError("Invalid subvolume")
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if ret.stderr != '':
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raise BtrfsVolumeError("Invalid subvolume")
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def _create_working_snapshot(self):
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self._ensure_subvolume()
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if os.path.exists(self.working_dir):
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print("Warning: working dir existed, are you sure no rsync job is running?")
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else:
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# print("btrfs subvolume snapshot {} {}".format(self.service_dir, self.working_dir))
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sh.btrfs("subvolume", "snapshot", self.service_dir, self.working_dir)
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def _commit_changes(self):
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self._ensure_subvolume()
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self._ensure_subvolume()
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gc_dir = self.gc_dir.format(timestamp=datetime.now().strftime("%s"))
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out = sh.mv(self.service_dir, gc_dir)
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assert out.exit_code == 0 and out.stderr == ""
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out = sh.mv(self.working_dir, self.service_dir)
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assert out.exit_code == 0 and out.stderr == ""
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# print("btrfs subvolume delete {}".format(self.tmp_dir))
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# sh.sleep(3)
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# out = sh.btrfs("subvolume", "delete", self.tmp_dir)
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# assert out.exit_code == 0 and out.stderr == ""
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# vim: ts=4 sw=4 sts=4 expandtab
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