def to_fs_from_unicode(unic):
"""
Return a byte string version of unic encoded using the file
system encoding.
"""
if is_unicode(unic):
try:
string = unic.encode(FS_ENCODING)
except (UnicodeError, TypeError):
pass
else:
return string
return unic
def to_fs_from_unicode(unic):
"""
Return a byte string version of unic encoded using the file
system encoding.
"""
if is_unicode(unic):
try:
string = unic.encode(FS_ENCODING)
except (UnicodeError, TypeError):
pass
else:
return string
return unic
def to_unicode(string):
"""Convert a string to unicode"""
if not is_unicode(string):
for codec in CODECS:
try:
unic = to_text_string(string, codec)
except UnicodeError:
pass
except TypeError:
break
else:
return unic
return string
def to_unicode(string):
"""Convert a string to unicode"""
if not is_unicode(string):
for codec in CODECS:
try:
unic = to_text_string(string, codec)
except UnicodeError:
pass
except TypeError:
break
else:
return unic
return string
def sort_versions(versions=(), reverse=False, sep=u'.'):
"""Sort a list of version number strings.
This function ensures that the package sorting based on number name is
performed correctly when including alpha, dev rc1 etc...
"""
if versions == []:
return []
digits = u'0123456789'
def toint(x):
try:
n = int(x)
except:
n = x
return n
versions = list(versions)
new_versions, alpha, sizes = [], set(), set()
for item in versions:
it = item.split(sep)
temp = []
for i in it:
x = toint(i)
if not isinstance(x, int):
x = u(x)
middle = x.lstrip(digits).rstrip(digits)
tail = toint(x.lstrip(digits).replace(middle, u''))
head = toint(x.rstrip(digits).replace(middle, u''))
middle = toint(middle)
res = [head, middle, tail]
while u'' in res:
res.remove(u'')
for r in res:
if is_unicode(r):
alpha.add(r)
else:
res = [x]
temp += res
sizes.add(len(temp))
new_versions.append(temp)
# replace letters found by a negative number
replace_dic = {}
alpha = sorted(alpha, reverse=True)
if len(alpha):
replace_dic = dict(zip(alpha, list(range(-1, -(len(alpha)+1), -1))))
# Complete with zeros based on longest item and replace alphas with number
nmax = max(sizes)
for i in range(len(new_versions)):
item = []
for z in new_versions[i]:
if z in replace_dic:
item.append(replace_dic[z])
else:
item.append(z)
nzeros = nmax - len(item)
item += [0]*nzeros
item += [versions[i]]
new_versions[i] = item
new_versions = sorted(new_versions, reverse=reverse)
return [n[-1] for n in new_versions]
