def entropy_compare_package_tags(tag_a, tag_b):
"""
Compare two Entropy package tags using builtin cmp().
@param tag_a: Entropy package tag
@type tag_a: string
@param tag_b: Entropy package tag
@type tag_b: string
return: negative number if tag_a < tag_b, positive number if tag_a > tag_b.
zero if tag_a == tag_b.
rtype: int
"""
return const_cmp(_nat_sort_key(tag_a), _nat_sort_key(tag_b))
def entropy_compare_versions(ver_data, ver_data2):
"""
@description: compare two lists composed by
[version,tag,revision] and [version,tag,revision]
if ver_data > ver_data2 --> positive number
if ver_data == ver_data2 --> 0
if ver_data < ver_data2 --> negative number
@input package: ver_data[version,tag,rev] and ver_data2[version,tag,rev]
@output: integer number
"""
a_ver, a_tag, a_rev = ver_data
b_ver, b_tag, b_rev = ver_data2
# if both are tagged, check tag first
rc = 0
if a_tag and b_tag:
rc = const_cmp(a_tag, b_tag)
if rc == 0:
rc = compare_versions(a_ver, b_ver)
if rc == 0:
# check tag
tag_cmp = entropy_compare_package_tags(a_tag, b_tag)
if tag_cmp < 0:
return -1
elif tag_cmp > 0:
return 1
else:
# check rev
if a_rev > b_rev:
return 1
elif a_rev < b_rev:
return -1
return 0
return rc
