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      1 #!/usr/bin/python
      2 # Copyright 2014 Google Inc. All rights reserved.
      3 #
      4 # Licensed under the Apache License, Version 2.0 (the "License");
      5 # you may not use this file except in compliance with the License.
      6 # You may obtain a copy of the License at
      7 #
      8 #     http://www.apache.org/licenses/LICENSE-2.0
      9 #
     10 # Unless required by applicable law or agreed to in writing, software
     11 # distributed under the License is distributed on an "AS IS" BASIS,
     12 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13 # See the License for the specific language governing permissions and
     14 # limitations under the License.
     15 
     16 """Simple script that locates the newest MSBuild in one of several locations.
     17 
     18 This script will find the highest version number of MSBuild and run it,
     19 passing its arguments through to MSBuild.
     20 """
     21 
     22 import glob
     23 import os
     24 import re
     25 import string
     26 import subprocess
     27 import sys
     28 
     29 SYSTEMROOT = os.getenv("SYSTEMROOT", "c:\\windows")
     30 PROGRAM_FILES = os.getenv("ProgramFiles", "c:\\Program Files")
     31 PROGRAM_FILES_X86 = os.getenv("ProgramFiles(x86)", "c:\\Program Files (x86)")
     32 
     33 SEARCH_FOLDERS = [ PROGRAM_FILES + "\\MSBuild\\*\\Bin\\MSBuild.exe",
     34                    PROGRAM_FILES_X86 + "\\MSBuild\\*\\Bin\\MSBuild.exe",
     35                    SYSTEMROOT + "\\Microsoft.NET\Framework\\*\\MSBuild.exe" ]
     36 
     37 def compare_version(a, b):
     38   """Compare two version number strings of the form W.X.Y.Z.
     39 
     40   The numbers are compared most-significant to least-significant.
     41   For example, 12.345.67.89 > 2.987.88.99.
     42 
     43   Args:
     44     a: First version number string to compare
     45     b: Second version number string to compare
     46 
     47   Returns:
     48     0 if the numbers are identical, a positive number if 'a' is larger, and
     49     a negative number if 'b' is larger.
     50   """
     51   aa = string.split(a, ".")
     52   bb = string.split(b, ".")
     53   for i in range(0, 4):
     54     if aa[i] != bb[i]:
     55       return cmp(int(aa[i]), int(bb[i]))
     56   return 0
     57 
     58 def main():
     59   msbuilds = []
     60 
     61   for folder in SEARCH_FOLDERS:
     62     for file in glob.glob(folder):
     63       p = subprocess.Popen([file, "/version"], stdout=subprocess.PIPE)
     64       out, err = p.communicate()
     65       match = re.search("^[0-9]+\\.[0-9]+\\.[0-9]+\\.[0-9]+$", out, re.M)
     66       if match:
     67         msbuilds.append({ 'ver':match.group(), 'exe':file })
     68   msbuilds.sort(lambda x, y: compare_version(x['ver'], y['ver']), reverse=True)
     69   if len(msbuilds) == 0:
     70     print "Unable to find MSBuild.\n"
     71     return -1;
     72   cmd = [msbuilds[0]['exe']]
     73   cmd.extend(sys.argv[1:])
     74   return subprocess.call(cmd)
     75 
     76 if __name__ == '__main__':
     77   sys.exit(main())
     78