import os;

BUILDNO_FILE = 'buildno.txt'

PKG_FILE_UDEB_TEMPLATE = 'podcatcher_udeb_template.pkg'

PKG_FILE_UDEB = 'podcatcher_udeb.pkg'

PKG_FILE_UREL_TEMPLATE = 'podcatcher_urel_template.pkg'

PKG_FILE_UREL = 'podcatcher_urel.pkg'

HEADER_FILE = '..\\inc\\buildno.h'

BUILDNO_TAG = 'BUILDNO'

def update_buildno(buildno_file):

	#read previous build number

	f = open(buildno_file, 'r')

	buildno = int(f.read())

	f.close()

	# increment build number and write it back to the file

	buildno = buildno + 1

	buildno_str = '%d' % buildno

	print 'New build number is %d' % buildno

	f = open(buildno_file, 'w')

	f.write(buildno_str)

	f.close()

	return buildno

def update_pkg(pkg_template, pkg_file, buildno):

	print 'Writing %s' % pkg_file

	#update 'build' number in PKG file

	f = open (pkg_template, 'r')

	g = open (pkg_file, 'w')

	buildno_str = '%d' % buildno

	for line in f:

		line = line.replace(BUILDNO_TAG, buildno_str)

		g.write(line)

def update_header(header_file, buildno):

	print 'Writing %s' % header_file

	buildno_str = '// Build number generated by increment_buildno.py, do not edit manually\r\n#define BUILD_NO %d' % buildno

	f = open(header_file, 'w')

	f.write(buildno_str)

	f.close()

	return buildno

new_buildno = update_buildno(BUILDNO_FILE)

update_pkg(PKG_FILE_UDEB_TEMPLATE, PKG_FILE_UDEB, new_buildno)

update_pkg(PKG_FILE_UREL_TEMPLATE, PKG_FILE_UREL, new_buildno)

update_header(HEADER_FILE, new_buildno)

print 'Remember to rebuild to get the build number into the about dialog!'