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# ex:ts=4:sw=4:sts=4:et
# -*- tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*-
"""
BitBake Utility Functions
"""
# Copyright (C) 2004 Michael Lauer
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
digits = "0123456789"
ascii_letters = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
import re
def explode_version(s):
r = []
alpha_regexp = re.compile('^([a-zA-Z]+)(.*)$')
numeric_regexp = re.compile('^(\d+)(.*)$')
while (s != ''):
if s[0] in digits:
m = numeric_regexp.match(s)
r.append(int(m.group(1)))
s = m.group(2)
continue
if s[0] in ascii_letters:
m = alpha_regexp.match(s)
r.append(m.group(1))
s = m.group(2)
continue
s = s[1:]
return r
def vercmp_part(a, b):
va = explode_version(a)
vb = explode_version(b)
while True:
if va == []:
ca = None
else:
ca = va.pop(0)
if vb == []:
cb = None
else:
cb = vb.pop(0)
if ca == None and cb == None:
return 0
if ca > cb:
return 1
if ca < cb:
return -1
def vercmp(ta, tb):
(ea, va, ra) = ta
(eb, vb, rb) = tb
r = int(ea)-int(eb)
if (r == 0):
r = vercmp_part(va, vb)
if (r == 0):
r = vercmp_part(ra, rb)
return r
def explode_deps(s):
"""
Take an RDEPENDS style string of format:
"DEPEND1 (optional version) DEPEND2 (optional version) ..."
and return a list of dependencies.
Version information is ignored.
"""
r = []
l = s.split()
flag = False
for i in l:
if i[0] == '(':
flag = True
j = []
if flag:
j.append(i)
else:
r.append(i)
if flag and i.endswith(')'):
flag = False
# Ignore version
#r[-1] += ' ' + ' '.join(j)
return r
def _print_trace(body, line):
"""
Print the Environment of a Text Body
"""
import bb
# print the environment of the method
bb.msg.error(bb.msg.domain.Util, "Printing the environment of the function")
min_line = max(1,line-4)
max_line = min(line+4,len(body)-1)
for i in range(min_line,max_line+1):
bb.msg.error(bb.msg.domain.Util, "\t%.4d:%s" % (i, body[i-1]) )
def better_compile(text, file, realfile):
"""
A better compile method. This method
will print the offending lines.
"""
try:
return compile(text, file, "exec")
except Exception, e:
import bb,sys
# split the text into lines again
body = text.split('\n')
bb.msg.error(bb.msg.domain.Util, "Error in compiling: ", realfile)
bb.msg.error(bb.msg.domain.Util, "The lines resulting into this error were:")
bb.msg.error(bb.msg.domain.Util, "\t%d:%s:'%s'" % (e.lineno, e.__class__.__name__, body[e.lineno-1]))
_print_trace(body, e.lineno)
# exit now
sys.exit(1)
def better_exec(code, context, text, realfile):
"""
Similiar to better_compile, better_exec will
print the lines that are responsible for the
error.
"""
import bb,sys
try:
exec code in context
except:
(t,value,tb) = sys.exc_info()
if t in [bb.parse.SkipPackage, bb.build.FuncFailed]:
raise
# print the Header of the Error Message
bb.msg.error(bb.msg.domain.Util, "Error in executing: ", realfile)
bb.msg.error(bb.msg.domain.Util, "Exception:%s Message:%s" % (t,value) )
# let us find the line number now
while tb.tb_next:
tb = tb.tb_next
import traceback
line = traceback.tb_lineno(tb)
_print_trace( text.split('\n'), line )
raise
def Enum(*names):
"""
A simple class to give Enum support
"""
assert names, "Empty enums are not supported"
class EnumClass(object):
__slots__ = names
def __iter__(self): return iter(constants)
def __len__(self): return len(constants)
def __getitem__(self, i): return constants[i]
def __repr__(self): return 'Enum' + str(names)
def __str__(self): return 'enum ' + str(constants)
class EnumValue(object):
__slots__ = ('__value')
def __init__(self, value): self.__value = value
Value = property(lambda self: self.__value)
EnumType = property(lambda self: EnumType)
def __hash__(self): return hash(self.__value)
def __cmp__(self, other):
# C fans might want to remove the following assertion
# to make all enums comparable by ordinal value {;))
assert self.EnumType is other.EnumType, "Only values from the same enum are comparable"
return cmp(self.__value, other.__value)
def __invert__(self): return constants[maximum - self.__value]
def __nonzero__(self): return bool(self.__value)
def __repr__(self): return str(names[self.__value])
maximum = len(names) - 1
constants = [None] * len(names)
for i, each in enumerate(names):
val = EnumValue(i)
setattr(EnumClass, each, val)
constants[i] = val
constants = tuple(constants)
EnumType = EnumClass()
return EnumType
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