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# Copyright 2013 Chris Johns (chrisj@rtems.org)
#
# This file's license is 2-clause BSD as in this distribution's LICENSE.2 file.
#
#
# Pkg-config in python. Pkg-config as a tool is a good idea how-ever the
# implementation is really Linux (or Unix) based and requires a couple of
# packages that it should not. If it was implemented with all parts included it
# would be portable and I suspect useful to others on platforms other than
# Linux or Unix equivs that contain the required packages.
#
import re
class error(Exception):
def __init__(self, msg):
self.msg = msg
def __str__(self):
return self.msg
class package:
def __init__(self, file=None):
self.defines = {}
self.fields = {}
if file:
self.load(file)
def load(self, file):
f = open(file)
tm = False
for l in f.readlines():
l = l[:-1]
hash = l.find('#')
if hash >= 0:
l = l[:hash]
if len(l):
d = 0
define = False
eq = l.find('=')
dd = l.find(':')
if eq > 0 and dd > 0:
if eq < dd:
define = True
d = eq
else:
define = False
d = dd
elif eq >= 0:
define = True
d = eq
elif dd >= 0:
define = False
d = dd
if d > 0:
lhs = l[:d].lower()
rhs = l[d + 1:]
if tm:
print('define: ' + str(define) + ', lhs: ' + lhs +
', ' + rhs)
if define:
self.defines[lhs] = rhs
else:
self.fields[lhs] = rhs
def get(self, label):
if label.lower() not in self.fields:
raise error('Label not found: ' + label)
mre = re.compile('\$\{[^\}]+\}')
s = self.fields[label.lower()]
expanded = True
tm = False
while expanded:
expanded = False
if tm:
print('pc:get: "' + s + '"')
ms = mre.findall(s)
for m in ms:
mn = m[2:-1]
if mn.lower() in self.defines:
s = s.replace(m, self.defines[mn.lower()])
expanded = True
return s
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