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Move env.{add,get}_lock() into cycles.py, and rename.

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They really aren't locks at all, they're a cycle detector.  Also rename
REDO_LOCKS to a more meaningful REDO_CYCLES.  And we'll move the
CyclicDependencyError exception in here as well, instead of state.py
where it doesn't really belong.
This commit is contained in:
Avery Pennarun 2018-12-05 00:18:07 -05:00
commit f1305b49eb
5 changed files with 32 additions and 25 deletions
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redo/env.py
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@ -33,14 +33,3 @@ os.environ['REDO_UNLOCKED'] = '' # not inheritable by subprocesses
NO_OOB = os.environ.get('REDO_NO_OOB', '') and 1 or 0
os.environ['REDO_NO_OOB'] = '' # not inheritable by subprocesses
def get_locks():
"""Get the list of held locks."""
return os.environ.get('REDO_LOCKS', '').split(':')
def add_lock(name):
"""Add a lock to the list of held locks."""
locks = set(get_locks())
locks.add(name)
os.environ['REDO_LOCKS'] = ':'.join(list(locks))