1#/usr/bin/python
2
3"""A script to prepare version informtion for use the gtest Info.plist file.
4
5  This script extracts the version information from the configure.ac file and
6  uses it to generate a header file containing the same information. The
7  #defines in this header file will be included in during the generation of
8  the Info.plist of the framework, giving the correct value to the version
9  shown in the Finder.
10
11  This script makes the following assumptions (these are faults of the script,
12  not problems with the Autoconf):
13    1. The AC_INIT macro will be contained within the first 1024 characters
14       of configure.ac
15    2. The version string will be 3 integers separated by periods and will be
16       surrounded by squre brackets, "[" and "]" (e.g. [1.0.1]). The first
17       segment represents the major version, the second represents the minor
18       version and the third represents the fix version.
19    3. No ")" character exists between the opening "(" and closing ")" of
20       AC_INIT, including in comments and character strings.
21"""
22
23import sys
24import re
25
26# Read the command line argument (the output directory for Version.h)
27if (len(sys.argv) < 3):
28  print "Usage: /usr/bin/python versiongenerate.py input_dir output_dir"
29  sys.exit(1)
30else:
31  input_dir = sys.argv[1]
32  output_dir = sys.argv[2]
33
34# Read the first 1024 characters of the configure.ac file
35config_file = open("%s/configure.ac" % input_dir, 'r')
36buffer_size = 1024
37opening_string = config_file.read(buffer_size)
38config_file.close()
39
40# Extract the version string from the AC_INIT macro
41#   The following init_expression means:
42#     Extract three integers separated by periods and surrounded by squre
43#     brackets(e.g. "[1.0.1]") between "AC_INIT(" and ")". Do not be greedy
44#     (*? is the non-greedy flag) since that would pull in everything between
45#     the first "(" and the last ")" in the file.
46version_expression = re.compile(r"AC_INIT\(.*?\[(\d+)\.(\d+)\.(\d+)\].*?\)",
47                                re.DOTALL)
48version_values = version_expression.search(opening_string)
49major_version = version_values.group(1)
50minor_version = version_values.group(2)
51fix_version = version_values.group(3)
52
53# Write the version information to a header file to be included in the
54# Info.plist file.
55file_data = """//
56// DO NOT MODIFY THIS FILE (but you can delete it)
57//
58// This file is autogenerated by the versiongenerate.py script. This script
59// is executed in a "Run Script" build phase when creating gtest.framework. This
60// header file is not used during compilation of C-source. Rather, it simply
61// defines some version strings for substitution in the Info.plist. Because of
62// this, we are not not restricted to C-syntax nor are we using include guards.
63//
64
65#define GTEST_VERSIONINFO_SHORT %s.%s
66#define GTEST_VERSIONINFO_LONG %s.%s.%s
67
68""" % (major_version, minor_version, major_version, minor_version, fix_version)
69version_file = open("%s/Version.h" % output_dir, 'w')
70version_file.write(file_data)
71version_file.close()
72