96 lines
2.7 KiB
Python
96 lines
2.7 KiB
Python
import json
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from typing import Dict
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from plumbum import local, ProcessExecutionError
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class CasWrapper:
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"""
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The python wrapper around binary `cas`
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from Codenotary Community Attestation Service
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"""
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binary_name = 'cas'
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def __init__(
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self,
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cas_api_key: str,
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cas_signer_id: str,
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):
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if self.binary_name not in local:
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raise FileNotFoundError(
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'Binary CAS is not found in PATH on the machine',
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)
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self._cas_api_key = cas_api_key
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self._cas_signer_id = cas_signer_id
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with local.env(
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CAS_API_KEY=self._cas_api_key,
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SIGNER_ID=self._cas_signer_id
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):
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self._cas = local['cas']
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self._cas['login']()
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def notarize(
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self,
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local_path: str,
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metadata: Dict = None,
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) -> str:
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"""
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Wrapper around `cas notarize`
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:param local_path: path to a local Git repo
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:param metadata: additional metadata
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:return: hash of notarized commit
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:rtype: str
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"""
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command = self._cas[
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'notarize',
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local_path,
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'-o',
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'json',
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]
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if metadata is not None:
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for key, value in metadata.items():
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command = command[
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'-a',
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f'{key}={value}',
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]
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with local.env(
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CAS_API_KEY=self._cas_api_key,
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SIGNER_ID=self._cas_signer_id
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):
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result_of_execution = command()
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return json.loads(result_of_execution)['hash']
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def authenticate(
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self,
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local_path: str,
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):
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"""
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Wrapper around `cas authenticate`
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:param local_path: path to a local Git repo
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(should be started from `git://`)
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or to a single local file
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:return: true if a commit is trusted, vice versa - false
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:rtype: bool
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"""
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command = self._cas[
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'authenticate',
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local_path,
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'-o',
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'json',
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]
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try:
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with local.env(
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CAS_API_KEY=self._cas_api_key,
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SIGNER_ID=self._cas_signer_id
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):
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result_of_execution = command()
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except ProcessExecutionError:
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with local.env(
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CAS_API_KEY=self._cas_api_key,
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SIGNER_ID=self._cas_signer_id
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):
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# in case if commit is untrusted
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result_of_execution = command(retcode=1)
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return not bool(json.loads(result_of_execution)['status'])
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