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#!/usr/bin/env python3
from datetime import datetime
from sqlalchemy import Blob, Column, ForeignKey, Integer, String, DateTime, create_engine, exists, desc
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import Session, relationship, backref
from sqlalchemy.orm.collections import attribute_mapped_collection
import logging
from hashlib import sha1
logger = logging.getLogger('sins')
now = '{0:%Y%m%dT%H%M%S}'.format(datetime.utcnow())
Base = declarative_base()
class SeedNode(Base):
ctime = Column(DateTime, default=datetime.utcnow)
id = Column(Integer, primary_key=True)
length = Column(Integer, default=0)
mtime = Column(DateTime, onupdate=datetime.utcnow)
parent_id = Column(Integer, ForeignKey(id))
checksum = Column(String)
stdout = Column(String)
image = Column(Blob)
children = relationship(
cascade="all, delete-orphan",
backref=backref("parent", remote_side=id),
def __init__(self, *, child: bytes, parent: SeedNode = None):
if parent:
self.parent_id =
self.image = child
self.length = len(child)
def sha1sum(self):
if self.checksum:
return self.checksum
checksum = sha1()
self.checksum = checksum.hexdigest()
return self.checksum