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# Parse Makefiles and Python Setup(.in) files.
import re
# Extract variable definitions from a Makefile.
# Return a dictionary mapping names to values.
# May raise IOError.
makevardef = re.compile('^([a-zA-Z0-9_]+)[ \t]*=(.*)')
def getmakevars(filename):
variables = {}
fp = open(filename)
pendingline = ""
try:
while 1:
line = fp.readline()
if pendingline:
line = pendingline + line
pendingline = ""
if not line:
break
if line.endswith('\\\n'):
pendingline = line[:-2]
matchobj = makevardef.match(line)
if not matchobj:
continue
(name, value) = matchobj.group(1, 2)
# Strip trailing comment
i = value.find('#')
if i >= 0:
value = value[:i]
value = value.strip()
variables[name] = value
finally:
fp.close()
return variables
# Parse a Python Setup(.in) file.
# Return two dictionaries, the first mapping modules to their
# definitions, the second mapping variable names to their values.
# May raise IOError.
setupvardef = re.compile('^([a-zA-Z0-9_]+)=(.*)')
def getsetupinfo(filename):
modules = {}
variables = {}
fp = open(filename)
pendingline = ""
try:
while 1:
line = fp.readline()
if pendingline:
line = pendingline + line
pendingline = ""
if not line:
break
# Strip comments
i = line.find('#')
if i >= 0:
line = line[:i]
if line.endswith('\\\n'):
pendingline = line[:-2]
continue
matchobj = setupvardef.match(line)
if matchobj:
(name, value) = matchobj.group(1, 2)
variables[name] = value.strip()
else:
words = line.split()
if words:
modules[words[0]] = words[1:]
finally:
fp.close()
return modules, variables
# Test the above functions.
def test():
import sys
import os
if not sys.argv[1:]:
print('usage: python parsesetup.py Makefile*|Setup* ...')
sys.exit(2)
for arg in sys.argv[1:]:
base = os.path.basename(arg)
if base[:8] == 'Makefile':
print('Make style parsing:', arg)
v = getmakevars(arg)
prdict(v)
elif base[:5] == 'Setup':
print('Setup style parsing:', arg)
m, v = getsetupinfo(arg)
prdict(m)
prdict(v)
else:
print(arg, 'is neither a Makefile nor a Setup file')
print('(name must begin with "Makefile" or "Setup")')
def prdict(d):
keys = sorted(d.keys())
for key in keys:
value = d[key]
print("%-15s" % key, str(value))
if __name__ == '__main__':
test()