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b2e1905e7a
The migration script should failure early when version is not supported Signed-off-by: DQ <dengq@vmware.com>
44 lines
1.7 KiB
Python
44 lines
1.7 KiB
Python
import yaml
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import click
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import importlib
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import os
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from collections import deque
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from migrations import MIGRATION_BASE_DIR
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def read_conf(path):
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with open(path) as f:
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try:
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d = yaml.safe_load(f)
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except Exception as e:
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click.echo("parse config file err, make sure your harbor config version is above 1.8.0", e)
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exit(-1)
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return d
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def _to_module_path(ver):
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return "migrations.version_{}".format(ver.replace(".","_"))
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def search(input_ver: str, target_ver: str) -> deque :
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"""
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Search accept a input version and the target version.
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Returns the module of migrations in the upgrade path
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"""
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upgrade_path, visited = deque(), set()
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while True:
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module_path = _to_module_path(target_ver)
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visited.add(target_ver) # mark current version for loop finding
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if os.path.isdir(os.path.join(MIGRATION_BASE_DIR, 'version_{}'.format(target_ver.replace(".","_")))):
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module = importlib.import_module(module_path)
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if module.revision == input_ver: # migration path found
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break
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elif module.down_revision is None: # migration path not found
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raise Exception('no migration path found')
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else:
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upgrade_path.appendleft(module)
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target_ver = module.down_revision
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if target_ver in visited: # version visited before, loop found
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raise Exception('find a loop caused by {} on migration path'.format(target_ver))
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else:
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raise Exception('{} not dir'.format(os.path.join(MIGRATION_BASE_DIR, 'versions', target_ver.replace(".","_"))))
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return upgrade_path
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