PCbuild/build_ssl.py

   1 # Script for building the _ssl module for Windows.
   2 # Uses Perl to setup the OpenSSL environment correctly
   3 # and build OpenSSL, then invokes a simple nmake session
   4 # for _ssl.pyd itself.
   5
   6 # THEORETICALLY, you can:
   7 # * Unpack the latest SSL release one level above your main Python source
   8 #   directory.  It is likely you will already find the zlib library and
   9 #   any other external packages there.
  10 # * Install ActivePerl and ensure it is somewhere on your path.
  11 # * Run this script from the PCBuild directory.
  12 #
  13 # it should configure and build SSL, then build the ssl Python extension
  14 # without intervention.
  15
  16 import os, sys, re
  17
  18 # Find all "foo.exe" files on the PATH.
  19 def find_all_on_path(filename, extras = None):
  20     entries = os.environ["PATH"].split(os.pathsep)
  21     ret = []
  22     for p in entries:
  23         fname = os.path.abspath(os.path.join(p, filename))
  24         if os.path.isfile(fname) and fname not in ret:
  25             ret.append(fname)
  26     if extras:
  27         for p in extras:
  28             fname = os.path.abspath(os.path.join(p, filename))
  29             if os.path.isfile(fname) and fname not in ret:
  30                 ret.append(fname)
  31     return ret
  32
  33 # Find a suitable Perl installation for OpenSSL.
  34 # cygwin perl does *not* work.  ActivePerl does.
  35 # Being a Perl dummy, the simplest way I can check is if the "Win32" package
  36 # is available.
  37 def find_working_perl(perls):
  38     for perl in perls:
  39         fh = os.popen(perl + ' -e "use Win32;"')
  40         fh.read()
  41         rc = fh.close()
  42         if rc:
  43             continue
  44         return perl
  45     print "Can not find a suitable PERL:"
  46     if perls:
  47         print " the following perl interpreters were found:"
  48         for p in perls:
  49             print " ", p
  50         print " None of these versions appear suitable for building OpenSSL"
  51     else:
  52         print " NO perl interpreters were found on this machine at all!"
  53     print " Please install ActivePerl and ensure it appears on your path"
  54     print "The Python SSL module was not built"
  55     return None
  56
  57 # Locate the best SSL directory given a few roots to look into.
  58 def find_best_ssl_dir(sources):
  59     candidates = []
  60     for s in sources:
  61         try:
  62             s = os.path.abspath(s)
  63             fnames = os.listdir(s)
  64         except os.error:
  65             fnames = []
  66         for fname in fnames:
  67             fqn = os.path.join(s, fname)
  68             if os.path.isdir(fqn) and fname.startswith("openssl-"):
  69                 candidates.append(fqn)
  70     # Now we have all the candidates, locate the best.
  71     best_parts = []
  72     best_name = None
  73     for c in candidates:
  74         parts = re.split("[.-]", os.path.basename(c))[1:]
  75         # eg - openssl-0.9.7-beta1 - ignore all "beta" or any other qualifiers
  76         if len(parts) >= 4:
  77             continue
  78         if parts > best_parts:
  79             best_parts = parts
  80             best_name = c
  81     if best_name is not None:
  82         print "Found an SSL directory at '%s'" % (best_name,)
  83     else:
  84         print "Could not find an SSL directory in '%s'" % (sources,)
  85     return best_name
  86
  87 def main():
  88     debug = "-d" in sys.argv
  89     build_all = "-a" in sys.argv
  90     make_flags = ""
  91     if build_all:
  92         make_flags = "-a"
  93     # perl should be on the path, but we also look in "\perl" and "c:\\perl"
  94     # as "well known" locations
  95     perls = find_all_on_path("perl.exe", ["\\perl\\bin", "C:\\perl\\bin"])
  96     perl = find_working_perl(perls)
  97     if perl is None:
  98         sys.exit(1)
  99
 100     print "Found a working perl at '%s'" % (perl,)
 101     # Look for SSL 2 levels up from pcbuild - ie, same place zlib etc all live.
 102     ssl_dir = find_best_ssl_dir(("../..",))
 103     if ssl_dir is None:
 104         sys.exit(1)
 105
 106     old_cd = os.getcwd()
 107     try:
 108         os.chdir(ssl_dir)
 109         # If the ssl makefiles do not exist, we invoke Perl to generate them.
 110         if not os.path.isfile(os.path.join(ssl_dir, "32.mak")) or \
 111            not os.path.isfile(os.path.join(ssl_dir, "d32.mak")):
 112             print "Creating the makefiles..."
 113             # Put our working Perl at the front of our path
 114             os.environ["PATH"] = os.path.split(perl)[0] + \
 115                                           os.pathsep + \
 116                                           os.environ["PATH"]
 117             # ms\32all.bat will reconfigure OpenSSL and then try to build
 118             # all outputs (debug/nondebug/dll/lib).  So we filter the file
 119             # to exclude any "nmake" commands and then execute.
 120             tempname = "ms\\32all_py.bat"
 121
 122             in_bat  = open("ms\\32all.bat")
 123             temp_bat = open(tempname,"w")
 124             while 1:
 125                 cmd = in_bat.readline()
 126                 print 'cmd', repr(cmd)
 127                 if not cmd: break
 128                 if cmd.strip()[:5].lower() == "nmake":
 129                     continue
 130                 temp_bat.write(cmd)
 131             in_bat.close()
 132             temp_bat.close()
 133             os.system(tempname)
 134             try:
 135                 os.remove(tempname)
 136             except:
 137                 pass
 138
 139         # Now run make.
 140         print "Executing nmake over the ssl makefiles..."
 141         if debug:
 142             rc = os.system("nmake /nologo -f d32.mak")
 143             if rc:
 144                 print "Executing d32.mak failed"
 145                 print rc
 146                 sys.exit(rc)
 147         else:
 148             rc = os.system("nmake /nologo -f 32.mak")
 149             if rc:
 150                 print "Executing 32.mak failed"
 151                 print rc
 152                 sys.exit(rc)
 153     finally:
 154         os.chdir(old_cd)
 155     # And finally, we can build the _ssl module itself for Python.
 156     defs = "SSL_DIR=%s" % (ssl_dir,)
 157     if debug:
 158         defs = defs + " " + "DEBUG=1"
 159     rc = os.system('nmake /nologo -f _ssl.mak ' + defs + " " + make_flags)
 160     sys.exit(rc)
 161
 162 if __name__=='__main__':
 163     main()