#!/usr/bin/env python


import re
import os
import sys
import string
import subprocess
import optparse


coriolisPattern = re.compile ( r".*coriolis.*" )


def stripPath ( pathName ):
  pathEnv = os.getenv ( pathName )
  if not pathEnv: return ""
  
  pathList     = string.split ( pathEnv, ':' )
  strippedList = []
  for pathElement in pathList:
    if not coriolisPattern.match(pathElement):
        strippedList += [ pathElement ]

  if len(strippedList) == 0: return ""

  strippedEnv = strippedList[0]
  for pathElement in strippedList[1:]:
      strippedEnv += ":" + pathElement

  return strippedEnv


def guessOs ():
    osSLSoC5x_64     = re.compile (".*Linux.*el5.*x86_64.*")
    osSLSoC5x        = re.compile (".*Linux.*(el5|2.6.23.13.*SoC).*")
    osLinux_64       = re.compile (".*Linux.*x86_64.*")
    osLinux          = re.compile (".*Linux.*")
    osDarwin         = re.compile (".*Darwin.*")

    uname = subprocess.Popen ( ["uname", "-srm"], stdout=subprocess.PIPE )
    lines = uname.stdout.readlines()

    libDir="lib"
    if osSLSoC5x_64.match(lines[0]):
      osType = "Linux.SLSoC5x_64"
      libDir = "lib64"
    elif osSLSoC5x   .match(lines[0]): osType = "Linux.SLSoC5x"
    elif osLinux_64  .match(lines[0]):
      osType = "Linux.x86_64"
      libDir = "lib64"
    elif osLinux     .match(lines[0]): osType = "Linux.i386"
    elif osDarwin    .match(lines[0]): osType = "Darwin"
    else:
        uname = subprocess.Popen ( ["uname", "-sr"], stdout=subprocess.PIPE )
        osType = uname.stdout.readlines()[0][:-1]

       #print "[WARNING] Unrecognized OS: \"%s\"." % lines[0][:-1]
       #print "          (using: \"%s\")" % osType
    
    return (osType,libDir)
      



if __name__ == "__main__":

  (osDir,libDir)  = guessOs()
  buildType       = "Debug"
  linkType        = "Shared"
  coriolisVersion = None
  rootDir         = None

  parser = optparse.OptionParser ()  
 # Build relateds.
  parser.add_option ( "--v1"     , action="store_true" ,                dest="v1"       )
  parser.add_option ( "--v2"     , action="store_true" ,                dest="v2"       )
  parser.add_option ( "--release", action="store_true" ,                dest="release"  )
  parser.add_option ( "--debug"  , action="store_true" ,                dest="debug"    )
  parser.add_option ( "--devel"  , action="store_true" ,                dest="devel"    )
  parser.add_option ( "--static" , action="store_true" ,                dest="static"   )
  parser.add_option ( "--shared" , action="store_true" ,                dest="shared"   )
  parser.add_option ( "--python" , action="store_true" ,                dest="python"   )
  parser.add_option ( "--root"   , action="store"      , type="string", dest="rootDir"  )
  ( options, args ) = parser.parse_args ()

  if options.v1:       coriolisVersion = 1
  if options.v2:       coriolisVersion = 2
  if options.release:  buildType       = "Release"
  if options.debug:    buildType       = "Debug"
  if options.devel:    buildType       = "Debug"
  if options.static:   linkType        = "Static"
  if options.shared:   linkType        = "Shared"
  if options.rootDir:  rootDir         = options.rootDir

  strippedPath        = stripPath ( "PATH" )
  strippedLibraryPath = stripPath ( "LD_LIBRARY_PATH" )
  strippedPythonPath  = stripPath ( "PYTHONPATH" )

  if coriolisVersion == 1:

    if not rootDir:
      rootDir = os.getenv("HOME") + "/coriolis-1.x"

    hurricaneTop = "%s/coriolis/%s/install" % ( rootDir, osDir )
    buildDir     = None
    shellScript  = \
"""
echo "Switching to Coriolis 1.x";
PATH=%(PATH)s;
LD_LIBRARY_PATH=%(LD_LIBRARY_PATH)s;
PYTHONPATH=%(PYTHONPATH)s;
HURRICANE_TOP=%(HURRICANE_TOP)s;
CORIOLIS_TOP=%(HURRICANE_TOP)s;
export PATH LD_LIBRARY_PATH PYTHONPATH HURRICANE_TOP CORIOLIS_TOP;
hash -r;
if [ -f "%(HURRICANE_TOP)s/share/etc/coriolis.sh" ]; then
  . "%(HURRICANE_TOP)s/share/etc/coriolis.sh"
fi
    """

  elif coriolisVersion == 2:

    if not rootDir:
      rootDir = os.getenv("HOME") + "/coriolis-2.x"

    buildDir            = buildType + "." + linkType
    coriolisTop         = "%s/%s/%s/install" % ( rootDir, osDir, buildDir )
    absLibDir           = "%s/%s"            % ( coriolisTop, libDir )
    strippedPath        = "%s/bin:%s"        % ( coriolisTop, strippedPath )
    strippedLibraryPath = "%s:%s"            % ( absLibDir, strippedLibraryPath )

    if options.python:
      pyVersion          = sys.version_info
      version            = "%d.%d"                     % (pyVersion[0],pyVersion[1])
      sitePackagesDir    = "%s/python%s/site-packages" % (absLibDir,version)
      strippedPythonPath = "%s:"         % (sitePackagesDir) + strippedPythonPath
      strippedPythonPath = "%s/cumulus:" % (sitePackagesDir) + strippedPythonPath
      strippedPythonPath = "%s/stratus:" % (sitePackagesDir) + strippedPythonPath

    shellScript = \
"""
echo "Switching to Coriolis 2.x (%(buildDir)s)";
PATH=%(PATH)s;
LD_LIBRARY_PATH=%(LD_LIBRARY_PATH)s;
PYTHONPATH=%(PYTHONPATH)s;
BOOTSTRAP_TOP=%(BOOTSTRAP_TOP)s;
CORIOLIS_TOP=%(CORIOLIS_TOP)s;
export PATH LD_LIBRARY_PATH PYTHONPATH BOOTSTRAP_TOP CORIOLIS_TOP;
hash -r
"""

  if coriolisVersion:
    print shellScript % { "PATH"            : strippedPath
                        , "LD_LIBRARY_PATH" : strippedLibraryPath
                        , "PYTHONPATH"      : strippedPythonPath
                        , "BOOTSTRAP_TOP"   : coriolisTop
                        , "CORIOLIS_TOP"    : coriolisTop
                        , "buildDir"        : buildDir
                        }