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"""
A set of utility function to manipulate package descriptions
"""
import re
from portage.versions import suffix_value
from pomu.util.misc import pivot
suffixes = [x[0] for x in sorted(suffix_value.items(), key=lambda x:x[1])]
def ver_str(vernum, suff, rev):
"""Gets the string representation of the version (specified by number, suffix and rev)"""
return vernum + (suff if suff else '') + ('-' + rev if rev else '')
def cpv_split(pkg, unified_ver=True):
"""
Extracts category, name, version number, suffix, revision from a package descriptor
e.g. dev-libs/openssl-0.9.8z_p8-r100 -> dev-libs, openssl, 0.9.8z, p8, r100
"""
# dev-libs/openssl-0.9.8z_p8-r100
category, _, pkg = pkg.rpartition('/') # category may be omitted
# openssl-0.9.8z_p8-r100
m = re.search(r'-r\d+$', pkg) # revision is optional
if m:
pkg, rev = pivot(pkg, m.start(0))
else:
rev = None
# openssl-0.9.8z_p8
m = re.search(r'_({})(\d*)$'.format('|'.join(suffixes)), pkg)
if m:
pkg, suff = pivot(pkg, m.start(0))
else:
suff = None
# openssl-0.9.8z
m = re.search(r'-(\d+(\.\d+)*)([a-z])?$', pkg)
if m:
pkg, vernum = pivot(pkg, m.start(0))
else:
vernum = None
# openssl
name = pkg
if unified_ver:
return category, name, ver_str(vernum, suff, rev)
else:
return category, name, vernum, suff, rev
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