def fixCurrentSymlink(self):
"""Update the 'current' symlink and prune old entries.
The 'current' symbolic link will point to the latest version present
in 'targetdir' and only the latest 3 valid entries will be kept.
Entries named as invalid versions, for instance 'alpha-X', will be
ignored and left alone. That's because they were probably copied
manually into this location, they should remain in place.
See `DebVersion` for more information about version validation.
"""
# Get an appropriately-sorted list of the valid installer directories
# now present in the target. Deliberately skip 'broken' versions
# because they can't be sorted anyway.
versions = []
for entry in scandir.scandir(self.targetdir):
# Skip the symlink.
if entry.name == 'current':
continue
# Skip broken versions.
try:
make_version(entry.name)
except VersionError:
continue
# Append the valid versions to the list.
versions.append(entry.name)
versions.sort(key=make_version, reverse=True)
# Make sure the 'current' symlink points to the most recent version
# The most recent version is in versions[0]
current = os.path.join(self.targetdir, 'current')
os.symlink(versions[0], '%s.new' % current)
os.rename('%s.new' % current, current)
# There may be some other unpacked installer directories in
# the target already. We only keep the three with the highest
# version (plus the one we just extracted, if for some reason
# it's lower).
for oldversion in versions[3:]:
if oldversion != self.version:
shutil.rmtree(os.path.join(self.targetdir, oldversion))
def fixCurrentSymlink(self):
"""Update the 'current' symlink and prune old entries.
The 'current' symbolic link will point to the latest version present
in 'targetdir' and only the latest 3 valid entries will be kept.
Entries named as invalid versions, for instance 'alpha-X', will be
ignored and left alone. That's because they were probably copied
manually into this location, they should remain in place.
See `DebVersion` for more information about version validation.
"""
# Get an appropriately-sorted list of the valid installer directories
# now present in the target. Deliberately skip 'broken' versions
# because they can't be sorted anyway.
versions = []
for inst in os.listdir(self.targetdir):
# Skip the symlink.
if inst == 'current':
continue
# Skip broken versions.
try:
make_version(inst)
except VersionError:
continue
# Append the valid versions to the list.
versions.append(inst)
versions.sort(key=make_version, reverse=True)
# Make sure the 'current' symlink points to the most recent version
# The most recent version is in versions[0]
current = os.path.join(self.targetdir, 'current')
os.symlink(versions[0], '%s.new' % current)
os.rename('%s.new' % current, current)
# There may be some other unpacked installer directories in
# the target already. We only keep the three with the highest
# version (plus the one we just extracted, if for some reason
# it's lower).
for oldversion in versions[3:]:
if oldversion != self.version:
shutil.rmtree(os.path.join(self.targetdir, oldversion))
def shouldInstall(self, filename):
""" Install files from a dist-upgrader tarball.
It raises DistUpgraderBadVersion if if finds a directory name that
could not be treated as a valid Debian version.
It returns False for extracted contents of a directory named
'current' (since it would obviously conflict with the symbolic
link in the archive).
Return True for contents of 'versionable' directories.
"""
# Only the first path part (directory name) must be *versionable*
# and we may allow subdirectories.
directory_name = filename.split(os.path.sep)[0]
try:
version = make_version(directory_name)
except BadUpstreamError as exc:
raise DistUpgraderBadVersion(self.tarfile_path, exc)
return version and not filename.startswith('current')
def shouldInstall(self, filename):
"""Install files from a dist-upgrader tarball.
It raises DistUpgraderBadVersion if if finds a directory name that
could not be treated as a valid Debian version.
It returns False for extracted contents of a directory named
'current' (since it would obviously conflict with the symbolic
link in the archive).
Return True for contents of 'versionable' directories.
"""
# Only the first path part (directory name) must be *versionable*
# and we may allow subdirectories.
directory_name = filename.split(os.path.sep)[0]
try:
version = make_version(directory_name)
except BadUpstreamError as exc:
raise DistUpgraderBadVersion(self.tarfile_path, exc)
return version and not filename.startswith('current')
