def detect_releasever(installroot):
# :api
"""Calculate the release version for the system."""
ts = transaction.initReadOnlyTransaction(root=installroot)
ts.pushVSFlags(~(rpm._RPMVSF_NOSIGNATURES | rpm._RPMVSF_NODIGESTS))
for distroverpkg in dnf.const.DISTROVERPKG:
try:
idx = ts.dbMatch('provides', distroverpkg)
except (TypeError, rpm.error) as e:
raise dnf.exceptions.Error('Error: %s' % str(e))
if not len(idx):
continue
try:
hdr = next(idx)
except StopIteration:
msg = 'Error: rpmdb failed to list provides. Try: rpm --rebuilddb'
raise dnf.exceptions.Error(msg)
releasever = hdr['version']
try:
off = hdr[rpm.RPMTAG_PROVIDENAME].index(distroverpkg)
flag = hdr[rpm.RPMTAG_PROVIDEFLAGS][off]
ver = hdr[rpm.RPMTAG_PROVIDEVERSION][off]
if flag == rpm.RPMSENSE_EQUAL and ver:
if hdr['name'] != distroverpkg:
# override the package version
releasever = ver
except (ValueError, KeyError, IndexError):
pass
if is_py3bytes(releasever):
releasever = str(releasever, "utf-8")
return releasever
return None
def detect_releasever(installroot):
# :api
"""Calculate the release version for the system."""
ts = transaction.initReadOnlyTransaction(root=installroot)
ts.pushVSFlags(~(rpm._RPMVSF_NOSIGNATURES | rpm._RPMVSF_NODIGESTS))
for distroverpkg in dnf.const.DISTROVERPKG:
try:
idx = ts.dbMatch('provides', distroverpkg)
except (TypeError, rpm.error) as e:
raise dnf.exceptions.Error('Error: %s' % str(e))
if not len(idx):
continue
try:
hdr = next(idx)
except StopIteration:
msg = 'Error: rpmdb failed to list provides. Try: rpm --rebuilddb'
raise dnf.exceptions.Error(msg)
releasever = hdr['version']
try:
off = hdr[rpm.RPMTAG_PROVIDENAME].index(distroverpkg)
flag = hdr[rpm.RPMTAG_PROVIDEFLAGS][off]
ver = hdr[rpm.RPMTAG_PROVIDEVERSION][off]
if flag == rpm.RPMSENSE_EQUAL and ver:
if hdr['name'] != distroverpkg:
# override the package version
releasever = ver
except (ValueError, KeyError, IndexError):
pass
if is_py3bytes(releasever):
releasever = str(releasever, "utf-8")
return releasever
return None
def getheader(rpm_hdr, key):
'''
Returns value of rpm_hdr[key] as a string. Rpm has switched from bytes to str
and we need to handle both properly.
'''
value = rpm_hdr[key]
if is_py3bytes(value):
value = str(value, "utf-8")
return value
def ucd(obj):
""" Like the builtin unicode() but tries to use a reasonable encoding. """
if PY3:
if is_py3bytes(obj):
return str(obj, _guess_encoding())
elif isinstance(obj, str):
return obj
return str(obj)
else:
if hasattr(obj, '__unicode__'):
# see the doc for the unicode() built-in. The logic here is: if obj
# implements __unicode__, let it take a crack at it, but handle the
# situation if it fails:
try:
return unicode(obj)
except UnicodeError:
pass
return unicode(str(obj), _guess_encoding())
def ucd(obj):
""" Like the builtin unicode() but tries to use a reasonable encoding. """
if PY3:
if is_py3bytes(obj):
return str(obj, _guess_encoding())
elif isinstance(obj, str):
return obj
return str(obj)
else:
if isinstance(obj, unicode):
return obj
if hasattr(obj, '__unicode__'):
# see the doc for the unicode() built-in. The logic here is: if obj
# implements __unicode__, let it take a crack at it, but handle the
# situation if it fails:
try:
return unicode(obj)
except UnicodeError:
pass
return unicode(str(obj), _guess_encoding())
def _getsysver(installroot, distroverpkg):
'''Calculate the release version for the system.
@param installroot: The value of the installroot option.
@param distroverpkg: The value of the distroverpkg option.
@return: The release version as a string (eg. '4' for FC4)
'''
ts = dnf.rpmUtils.transaction.initReadOnlyTransaction(root=installroot)
ts.pushVSFlags(~(rpm._RPMVSF_NOSIGNATURES | rpm._RPMVSF_NODIGESTS))
try:
idx = ts.dbMatch('provides', distroverpkg)
except TypeError as e:
# This is code for "cannot open rpmdb"
# this is for pep 352 compliance on python 2.6 and above :(
if sys.hexversion < 0x02050000:
if hasattr(e, 'message'):
raise dnf.exceptions.Error("Error: " + str(e.message))
else:
raise dnf.exceptions.Error("Error: " + str(e))
raise dnf.exceptions.Error("Error: " + str(e))
except rpm.error as e:
# This is the "new" code for "cannot open rpmdb", 4.8.0 ish
raise dnf.exceptions.Error("Error: " + str(e))
# we're going to take the first one - if there is more than one of these
# then the user needs a beating
if len(idx) == 0:
releasever = '$releasever'
else:
try:
hdr = next(idx)
except StopIteration:
raise dnf.exceptions.Error(
"Error: rpmdb failed release provides. Try: rpm --rebuilddb")
releasever = hdr['version']
if is_py3bytes(releasever):
releasever = str(releasever, "utf-8")
del hdr
del idx
del ts
return releasever
def detect_releasever(installroot):
"""Calculate the release version for the system. :api"""
ts = transaction.initReadOnlyTransaction(root=installroot)
ts.pushVSFlags(~(rpm._RPMVSF_NOSIGNATURES | rpm._RPMVSF_NODIGESTS))
for distroverpkg in dnf.const.DISTROVERPKG:
try:
idx = ts.dbMatch('provides', distroverpkg)
except (TypeError, rpm.error) as e:
raise dnf.exceptions.Error('Error: %s' % str(e))
if not len(idx):
continue
try:
hdr = next(idx)
except StopIteration:
msg = 'Error: rpmdb failed to list provides. Try: rpm --rebuilddb'
raise dnf.exceptions.Error(msg)
releasever = hdr['version']
if is_py3bytes(releasever):
releasever = str(releasever, "utf-8")
return releasever
return None
def detect_releasever(installroot):
"""Calculate the release version for the system. :api"""
ts = transaction.initReadOnlyTransaction(root=installroot)
ts.pushVSFlags(~(rpm._RPMVSF_NOSIGNATURES|rpm._RPMVSF_NODIGESTS))
for distroverpkg in dnf.const.DISTROVERPKG:
try:
idx = ts.dbMatch('provides', distroverpkg)
except (TypeError, rpm.error) as e:
raise dnf.exceptions.Error('Error: %s' % str(e))
if not len(idx):
continue
try:
hdr = next(idx)
except StopIteration:
msg = 'Error: rpmdb failed to list provides. Try: rpm --rebuilddb'
raise dnf.exceptions.Error(msg)
releasever = hdr['version']
if is_py3bytes(releasever):
releasever = str(releasever, "utf-8")
return releasever
return None
def _getsysver(installroot, distroverpkg):
'''Calculate the release version for the system.
@param installroot: The value of the installroot option.
@param distroverpkg: The value of the distroverpkg option.
@return: The release version as a string (eg. '4' for FC4)
'''
ts = dnf.rpmUtils.transaction.initReadOnlyTransaction(root=installroot)
ts.pushVSFlags(~(rpm._RPMVSF_NOSIGNATURES|rpm._RPMVSF_NODIGESTS))
try:
idx = ts.dbMatch('provides', distroverpkg)
except TypeError as e:
# This is code for "cannot open rpmdb"
# this is for pep 352 compliance on python 2.6 and above :(
if sys.hexversion < 0x02050000:
if hasattr(e,'message'):
raise dnf.exceptions.Error("Error: " + str(e.message))
else:
raise dnf.exceptions.Error("Error: " + str(e))
raise dnf.exceptions.Error("Error: " + str(e))
except rpm.error as e:
# This is the "new" code for "cannot open rpmdb", 4.8.0 ish
raise dnf.exceptions.Error("Error: " + str(e))
# we're going to take the first one - if there is more than one of these
# then the user needs a beating
if idx.count() == 0:
releasever = '$releasever'
else:
try:
hdr = next(idx)
except StopIteration:
raise dnf.exceptions.Error("Error: rpmdb failed release provides. Try: rpm --rebuilddb")
releasever = hdr['version']
if is_py3bytes(releasever):
releasever = str(releasever, "utf-8")
del hdr
del idx
del ts
return releasever
