# Copyright (c) 2009 Symbian Foundation Ltd

# This component and the accompanying materials are made available

# under the terms of the License "Eclipse Public License v1.0"

# which accompanies this distribution, and is available

# at the URL "http://www.eclipse.org/legal/epl-v10.html".

#

# Initial Contributors:

# Symbian Foundation Ltd - initial contribution.

#

# Contributors:

# mattd <mattd@symbian.org>

#

# Description:

# DBRutils - Module for handling little bits of stuff to do with generating hashes and scaning directories

import re

import os

import sys

import string

import shutil

import time

from os.path import join, isfile, stat

from stat import *

import glob # temporary (I hope) used for grabbing stuf from zip files...

import tempfile

def defaultdb():

  return os.path.join(patch_path_internal(),'baseline.db')

def patchpath():

  return os.path.join(epocroot(),'%s/' % patch_path_internal())

def patch_path_internal():

  return 'epoc32/relinfo'

def exclude_dirs():

    fixpath = re.compile('\\\\')

    leadingslash = re.compile('^%s' % fixpath.sub('/',epocroot()))

    return [string.lower(leadingslash.sub('',fixpath.sub('/',os.path.join(epocroot(),'epoc32/build')))),string.lower(leadingslash.sub('',fixpath.sub('/',patch_path_internal())))]

def exclude_files():

#    return ['\.sym$','\.dll$'] # just testing...

    return ['\.sym$']

def epocroot():

    return os.environ.get('EPOCROOT')

def scanenv():

    print 'Scanning local environment'

    directory = os.path.join(epocroot(),'epoc32')

    env = scandir(directory, exclude_dirs(), exclude_files())

    return env

def createzip(files, name):

    tmpfilename = os.tmpnam( )

    print tmpfilename    

    f = open(tmpfilename,'w')

    for file in sorted(files):

        str = '%s%s' % (file,'\n')

        f.write(str)    

    f.close()

    os.chdir(epocroot())

    exestr = '7z a -Tzip -i@%s %s' %(tmpfilename,name)

    print 'executing: >%s<\n' %exestr

    os.system(exestr)

    os.unlink(tmpfilename)

def extractfiles(files, path):

    zips = glob.glob(os.path.join(path, '*.zip'))

    for name in zips:

      extractfromzip(files, name,'')    

def extractfromzip(files, name, location):

    tmpfilename = os.tmpnam( )

    print tmpfilename

    cwd = os.getcwd();

    os.chdir(os.path.join(epocroot(),location))

    f = open(tmpfilename,'w')

    for file in sorted(files):

        str = '%s%s' % (file,'\n')

        f.write(str)    

    f.close()

    exestr = '7z x -y -i@%s %s >nul' %(tmpfilename,name)

#    exestr = '7z x -y -i@%s %s' %(tmpfilename,name)

    print 'executing: >%s<\n' %exestr

    os.system(exestr)

    os.unlink(tmpfilename)

    os.chdir(cwd)

def deletefiles(files):

    os.chdir(epocroot())

    for file in files:

      print 'deleting %s' %file

      os.unlink(file)

def getzippedDB(location):

    db = dict()

    md5zip = os.path.join(location,'build_md5.zip')

    print md5zip 

    print temp_dir 

    if(os.path.exists(md5zip)):

      files = set();

      files.add('*')

      extractfromzip(files,md5zip,temp_dir)

      globsearch = os.path.join(temp_dir, os.path.join(patch_path_internal(),'*.md5'))

      hashes = glob.glob(globsearch)

      for file in hashes:

#          print 'Reading: %s\n' % file

          gethashes(db, file, True)

    shutil.rmtree(temp_dir)            

    return db

def generateMD5s(testset):

    db = dict()

    if(len(testset)):

#      print testset

      os.chdir(epocroot())

      tmpfilename = os.tmpnam( )

      print tmpfilename, '\n'

      f = open(tmpfilename,'w')

      for file in testset:

          entry = dict()

          entry['md5'] = 'xxx'

          db[file] = entry

          str = '%s%s' % (file,'\n')

          f.write(str)

      f.close()

      outputfile = os.tmpnam() 

      exestr = 'evalid -f %s %s %s' % (tmpfilename, epocroot(), outputfile)

#      print exestr

      exeresult = os.system(exestr) 

      if(exeresult):

        sys.exit('Fatal error executing: %s\nReported error: %s' % (exestr,os.strerror(exeresult)))

      else:  

        db = gethashes(db, outputfile, True)

        os.unlink(outputfile)

        os.unlink(tmpfilename)

    return db

# Brittle and nasty!!!

def gethashes(db, md5filename, create):

    os.chdir(epocroot())

#    print 'trying to open %s' % md5filename

    file = open(md5filename,'r')

    root = ''

    fixpath = re.compile('\\\\')

    leadingslash = re.compile('^%s' % fixpath.sub('/',epocroot()))

    evalidparse = re.compile('(.+)\sTYPE=(.+)\sMD5=(.+)')

    dirparse = re.compile('Directory:(\S+)')

    for line in file:

        res = evalidparse.match(line)

        if(res):

            filename = "%s%s" % (root,res.group(1))

            filename = string.lower(fixpath.sub('/',leadingslash.sub('',filename)))            

#            print "found %s" % filename

            if(create):

              entry = dict()

              entry['time'] = '0'

              entry['size'] = '0'

              entry['md5'] = res.group(3)

              db[filename] = entry

            else:    

              if(filename in db):

                  db[filename]['md5'] = res.group(3)

        else:

            res = dirparse.match(line)

            if(res):

                if(res.group(1) == '.'):

                    root = ''

                else:

                    root = '%s/' % res.group(1)

    file.close()

    return db

def scandir(top, exclude_dirs, exclude_files):

# exclude_dirs must be in lower case...

#    print "Remember to expand the logged dir from", top, "!!!"

    countdown = 0

    env = dict()

    fixpath = re.compile('\\\\')

    leadingslash = re.compile('^%s' % fixpath.sub('/',epocroot()))

    ignorestr=''

    for exclude in exclude_files:

      if(len(ignorestr)):

        ignorestr = '%s|%s' % (ignorestr, exclude)

      else:

        ignorestr = exclude    

    ignore = re.compile(ignorestr) 

    for root, dirs, files in os.walk(top, topdown=True):

        for dirname in dirs:

#            print string.lower(leadingslash.sub('',fixpath.sub('/',os.path.join(root,dirname))))

            if(string.lower(leadingslash.sub('',fixpath.sub('/',os.path.join(root,dirname)))) in exclude_dirs):

#              print 'removing: %s' % os.path.join(root,dirname)

              dirs.remove(dirname)

        for name in files:

            filename = os.path.join(root, name)

            statinfo = os.stat(filename)

            fn = string.lower(leadingslash.sub('',fixpath.sub('/',filename)))

#            print '%s\t%s' % (filename, fn);

            if(countdown == 0):

                print '.',

                countdown = 1000

            countdown = countdown-1

            if not ignore.search(fn,1):

              entry = dict()

              entry['time'] = '%d' % statinfo[ST_MTIME]

              entry['size'] = '%d' % statinfo[ST_SIZE]

              entry['md5'] = 'xxx'

              env[fn] = entry

  #            data = [statinfo[ST_MTIME],statinfo[ST_SIZE],'xxx']

  #            env[fn] = data

    print '\n'

    return env

def readfilenamesfromfile(filename):

  files = set()

  f = open(filename, 'r')

  fixpath = re.compile('\\\\')

  leadingslash = re.compile('^%s' % fixpath.sub('/',epocroot()))

  newline = re.compile('\n')

  epoc32 = re.compile('^epoc32');

  trailingtab = re.compile('\t\d+') #normally in rombuild files...

  for line in f:

    line = newline.sub('',line)

    name = string.lower(leadingslash.sub('',fixpath.sub('/',line)))

    if(epoc32.search(name)):

      name = trailingtab.sub('',name) 

      files.add(name)

  f.close()  

  return files