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Check for presence of lockfile value before proceeding with context manager

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This commit is contained in:
Eric Torres 2019-04-15 23:51:00 -07:00
parent 4523d0c79d
commit 2d050eaaf9
1 changed files with 4 additions and 2 deletions
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6
rbackup/plugins/packagemanager.py
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@ -71,14 +71,16 @@ class PackageManager:
:rtype: ``PackageManager`` object :rtype: ``PackageManager`` object
:raises FileExistsError: if lockfile exists when this method is called :raises FileExistsError: if lockfile exists when this method is called
""" """
self._lockfile.touch(mode=0o000) if self._lockfile:
self._lockfile.touch(mode=0o000, exist_ok=False)
yield self yield self
def __exit__(self): def __exit__(self):
"""Remove the package manager's lockfile. After this lockfile is closed, """Remove the package manager's lockfile. After this lockfile is closed,
the package manager this class abstracts can perform transactions once again. the package manager this class abstracts can perform transactions once again.
""" """
self._lockfile.unlink() if self._lockfile:
self._lockfile.unlink()
def gen_pkglist(self): def gen_pkglist(self):
"""Generate a text file listing installed packages """Generate a text file listing installed packages