| # Gaudi Framework, version v20r4
Generated: 8 Jan 2009

# merge_files.py

Go to the documentation of this file.

    00001 #!/usr/bin/env python
    00002
    00003 # @file: GaudiPolicy/cmt/fragments/merge_files.py
    00004 # @purpose: merge_files <fragment> file into a 'per-project' <merged> file
    00005 # @author: Sebastien Binet <binet@cern.ch>
    00006
    00007 import os
    00008 import sys
    00009 from datetime import datetime
    00010 import locker
    00011
    00012 def mergeFiles( fragFileName, mergedFileName, commentChar, doMerge ):
    00013
    00014     isNewFile = not os.path.exists(mergedFileName)
    00015
    00016     # create an empty file if it does not exist
    00017     # "append mode" ensures that, in case of two processes trying to
    00018     # create the file, they do not truncate each other file
    00019     if isNewFile:
    00020         # check if the destination directory exists
    00021         path_to_file = os.path.split(mergedFileName)[0]
    00022         if not os.path.isdir(path_to_file):
    00023             # if doesn't exist, create it
    00024             os.makedirs(path_to_file)
    00025         open(mergedFileName,'a')
    00026
    00027     mergedFile = open( mergedFileName, 'r+' )
    00028
    00029     # locking file, gaining exclusive access to it
    00030     lock = locker.lock( mergedFile )
    00031     try:
    00032
    00033
    00034         startMark = "%s --Beg %s" % ( commentChar,
    00035                                       os.path.basename(fragFileName) )
    00036         timeMark  = "%s --Date inserted: %s" % ( commentChar,
    00037                                                  str(datetime.now()) )
    00038         endMark   = "%s --End %s" % ( commentChar,
    00039                                       os.path.basename(fragFileName) )
    00040
    00041         newLines = [ ]
    00042         skipBlock = False
    00043         for line in mergedFile.readlines():
    00044             if line.startswith(startMark):
    00045                 skipBlock = True
    00046                 # remove all the empty lines occurring before the start mark
    00047                 while (len(newLines) > 0) and (newLines[-1].strip() == ''):
    00048                     newLines.pop()
    00049             if not skipBlock:
    00050                 newLines.append(line)
    00051             if line.startswith(endMark):
    00052                 skipBlock = False
    00053         if skipBlock:
    00054             print "WARNING: missing end mark ('%s')"%endMark
    00055
    00056         if doMerge:
    00057             # I do not want to add 2 empty lines at the beginning of a file
    00058             if not isNewFile:
    00059                 newLines.append('\n\n')
    00060             newLines.append(startMark+'\n')
    00061             newLines.append(timeMark+'\n')
    00062
    00063             for line in open( fragFileName, 'r' ).readlines():
    00064                 newLines.append(line)
    00065
    00066             newLines.append(endMark+'\n')
    00067
    00068         mergedFile.seek(0)
    00069         mergedFile.truncate(0)
    00070         mergedFile.writelines(newLines)
    00071
    00072     finally:
    00073         # unlock file
    00074         locker.unlock( mergedFile )
    00075
    00076     return 0
    00077
    00078 if __name__ == "__main__":
    00079
    00080     from optparse import OptionParser
    00081     parser = OptionParser(usage="usage: %prog [options]")
    00082     parser.add_option(
    00083         "-i",
    00084         "--input-file",
    00085         dest = "fragFileName",
    00086         default = None,
    00087         help = "The path and name of the file one wants to merge into the 'master' one"
    00088         )
    00089     parser.add_option(
    00090         "-m",
    00091         "--merged-file",
    00092         dest = "mergedFileName",
    00093         default = None,
    00094         help = "The path and name of the 'master' file which will hold the content of all the other fragment files"
    00095         )
    00096     parser.add_option(
    00097         "-c",
    00098         "--comment-char",
    00099         dest = "commentChar",
    00100         default = "#",
    00101         help = "The type of the commenting character for the type of files at hand (this is an attempt at handling the largest possible use cases)"
    00102         )
    00103     parser.add_option(
    00104         "--do-merge",
    00105         dest = "doMerge",
    00106         action = "store_true",
    00107         default = True,
    00108         help = "Switch to actually carry on with the merging procedure"
    00109         )
    00110     parser.add_option(
    00111         "--un-merge",
    00112         dest = "unMerge",
    00113         action = "store_true",
    00114         default = False,
    00115         help = "Switch to remove our fragment file from the 'master' file"
    00116         )
    00117     parser.add_option(
    00118         "--stamp-dir",
    00119         dest = "stampDir",
    00120         action = "store",
    00121         default = None,
    00122         help = "Create the stamp file in the specified directory. If not specified"
    00123               +" the directory of the source file is used."
    00124         )
    00125
    00126     (options, args) = parser.parse_args()
    00127
    00128     # ensure consistency...
    00129     options.doMerge = not options.unMerge
    00130
    00131     # allow command line syntax as
    00132     #   merge_files.py [options] <fragment file> <merged file>
    00133     if len(args) > 0 and args[0][0] != "-": options.fragFileName   = args[0]
    00134     if len(args) > 1 and args[1][0] != "-": options.mergedFileName = args[1]
    00135
    00136     sc = 1
    00137     if not options.fragFileName or \
    00138        not options.mergedFileName :
    00139         str(parser.print_help() or "")
    00140         print "*** ERROR ***",sys.argv
    00141         sys.exit(sc)
    00142         pass
    00143
    00144     if options.stampDir is None:
    00145         stampFileName  = options.fragFileName + ".stamp"
    00146     else:
    00147         stampFileName = os.path.join(options.stampDir,
    00148                                      os.path.basename(options.fragFileName)
    00149                                          + ".stamp")
    00150     try:
    00151         sc = mergeFiles( options.fragFileName, options.mergedFileName,
    00152                          options.commentChar,
    00153                          doMerge = options.doMerge )
    00154         stamp = open( stampFileName, 'w' )
    00155         stamp.close()
    00156     except IOError, err:
    00157         print "ERROR:",err
    00158     except Exception, err:
    00159         print "ERROR:",err
    00160     except:
    00161         print "ERROR: unknown error !!"
    00162
    00163     sys.exit( sc )