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#!/usr/bin/env python
#
# getversion.py - Parse version numbers from C header files.
#
import os
import re
import sys
__all__ = ['Parser', 'Result']
class Result:
pass
class Parser:
def __init__(self):
self.patterns = {}
def search(self, define_name, value_name):
'Add the name of a define to the list of search pattenrs.'
self.patterns[define_name] = value_name
def parse(self, file):
'Parse the file, extracting defines into a Result object.'
stream = open(file, 'rt')
result = Result()
regex = re.compile(r'^\s*#\s*define\s+(\w+)\s+(\d+)')
for line in stream.readlines():
match = regex.match(line)
if match:
try:
name = self.patterns[match.group(1)]
except:
continue
setattr(result, name, int(match.group(2)))
stream.close()
return result
def svn_extractor(parser, include_file):
'''Pull values from svn.version.h'''
p.search('SVN_VER_MAJOR', 'major')
p.search('SVN_VER_MINOR', 'minor')
p.search('SVN_VER_PATCH', 'patch')
try:
r = p.parse(include_file)
except IOError, e:
usage_and_exit(str(e))
sys.stdout.write("%d.%d.%d" % (r.major, r.minor, r.patch))
def sqlite_extractor(parser, include_file):
'''Pull values from sqlite3.h'''
p.search('SQLITE_VERSION_NUMBER', 'version')
try:
r = p.parse(include_file)
except IOError, e:
usage_and_exit(str(e))
major = r.version / 1000000
minor = (r.version - (major * 1000000)) / 1000
micro = (r.version - (major * 1000000) - (minor * 1000))
sys.stdout.write("%d.%d.%d" % (major, minor, micro))
extractors = {
'SVN' : svn_extractor,
'SQLITE' : sqlite_extractor,
}
def usage_and_exit(msg):
if msg:
sys.stderr.write("%s\n\n" % msg)
sys.stderr.write("usage: %s [SVN|SQLITE] [header_file]\n" % \
os.path.basename(sys.argv[0]))
sys.stderr.flush()
sys.exit(1)
if __name__ == '__main__':
if len(sys.argv) == 3:
extractor = extractors[sys.argv[1]]
include_file = sys.argv[2]
else:
usage_and_exit("Incorrect number of arguments")
# Extract and print the version number
p = Parser()
extractor(p, include_file)
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