- source_sha1 = self.source_sha1
- if self.pk:
- source_sha1 = type(self).objects.get(pk=self.pk).source_sha1
- while source_sha1 == 'wait':
- sleep(10)
- if not source_sha1:
- self.source_sha1 = 'wait'
- if self.pk:
- type(self).objects.filter(pk=self.pk).update(source_sha1='wait')
- try:
- f = open(force_bytes(self.source_file.path))
- source_sha1 = sha1_file(f)
- self.source_sha1 = source_sha1
- if self.pk:
- type(self).objects.filter(pk=self.pk).update(source_sha1=source_sha1)
- except:
- self.source_sha1 = ''
- if self.pk:
- type(self).objects.filter(pk=self.pk).update(source_sha1='')
- return None
- return source_sha1
-
+ assert self.pk or self.source_sha1
+ if not self.source_sha1:
+ with advisory_lock(f'get_source_sha1_{self.pk}'):
+ with open(self.source_file.path, 'rb') as f:
+ self.source_sha1 = sha1_file(f)
+ self.save(update_fields=['source_sha1'])
+ return self.source_sha1