/*
* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies). 
* All rights reserved.
* 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:
* Nokia Corporation - initial contribution.
*
* Contributors:
*
* Description:
*
*/

HeaderAnalyser

ACCEPTED PARAMETERS
    -baseline <filename>
        - required specifier: a filename with or without path
        - "previous version" header files to analyse
        - one of the next choices has to be set: -baseline or -baselinedir
        - if used -current is mandatory
    -baselinedir <path with filename>
        - required specifier: a directory name with filename
        - filename may be a wildcard (e.g. "*.h", "coe*.h", "*.*")
        - if using file sets (-set parameter) then you can only give directory
        - all files in this directory are subject to analysis
        - one of the next choices has to be set: -baseline or -baselinedir
        - if used -currentdir is mandatory
    -baselineversion <string>
        - required specifier: alphanumerical string, no whitespaces or newlines or other
          "sensitive" characters
        - version name of the "previous version" files that are subjected to analysis
        - optional
    -current <filename>
        - same as -baseline, except for "current version" header files
        - if used -baseline is mandatory
    -currentdir <directory>
        - same as -baselinedir, except for "current version" header files
        - if used -baselinedir is mandatory
    -currentversion <string>
        - same as -baselineversion
    -reportfile <filename>
        - required specifier: filename
        - output name of the XML-formatted analysis report file
        - mandatory
    -commandfile <filename>
        - required specifier: filename of a text file containing more command switches
        - contains more command-line switches
        - overrides environment variables
        - command-line parameters override command-file parameters
        - optional
    -baseplatformheaders <directory>
        - required specifier: directory name
        - points to the "base header set" that is to be used when analysing
          "previous version" headers
        - e.g. c:\symbian\s60_2nd_fp2\epoc32\include
        - mandatory
    -currentplatformheaders <directory>
        - as -baseplatformroot, except for "current version" headers
        - e.g. c:\symbian\s60_3rd_beta1\epoc32\include
        - mandatory
    -forcebaseinclude <path>
        - specifies a file which is always included first in generated 
          temporary cpp file for baseline.
        - optional
    -forcecurrentinclude <path>
        - specifies a file which is always included first in generated 
          temporary cpp file for current.
        - optional
    -set <file1[;file2]*>
        - you can give file list which is separated with semicolon
        - if given is used instead of wildcards in baselinedir-parameter
        - optional; can only be used with -baselinedir/-currentdir
    -replace <file newfile [file newfile]*>
        - takes pairs of paths as parameters
        - first of pair tells which file to replace, if directory is given it's trunkated away
        - second of pair tells which path (directory + filename) to use instead
        - optional; can only be used with -baselinedir/-currentdir
    -recursive
        - no specifiers allowed
        - if recursive is defined, then subdirectories will be analysed as well
        - optional; can only be used with -baselinedir/-currentdir
    -baseplatformheaders <filename>
        - required specifier: a file name or a list of file names, separated by semicolons
        - forces the inclusion of these files during the "previous version" preprocessing phase
        - may slow down the system significantly
        - mandatory, in practice required when processing symbian files (many of the headers in 
          epoc32\include
          make implicit assumptions about pre-included header files)
    -currentplatformheaders <filename>
        - same as -baseplatformheaders, except for "current version" files        
    -bundlesize <count>
        - required specifier: integer between 0 and 9999
        - specifies how large "header bundles" to use when running the analysis
        - larger bundles lead to shorter preprocessing times
        - actual analysis might take longer when the XML files are large
        - default 1
        - optional
    -temp <directory>
        - output location of temporary files
        - optional
    -docurl <url>
        - tells where documentation can be found
        - specifier added to end of url
        - used for report
        - optional

1. it's possible to compare two files

command -baseline c:\base\test.h -current c:\current\test.h -baseplatformheaders C:\Symbian\9.1\S60_3rd_Beta\Epoc32\include -currentplatformheaders C:\Symbian\9.1\S60_3rd_Beta\Epoc32\include

2. its possible to compare files of two directories (recursively)

command -baselinedir c:\base\*.h -current c:\current\*.h -baseplatformheaders C:\Symbian\9.1\S60_3rd_Beta\Epoc32\include -currentplatformheaders C:\Symbian\9.1\S60_3rd_Beta\Epoc32\include (-recursive)

3. its possible to compare two file sets (recursively)

command -baselinedir c:\base -current c:\current -baseplatformheaders c:\symbian\9.1\S60_3rd_Beta\Epoc32\include -currenplatformheaders
c:\symbian\9.1\S60_3rd_Beta\Epoc32\include (-recursive) -set file1.h;file2.h;file3.h;text.txt;file5.h

Q. How about situation when file name has been renamed?

A.
command -baselinedir c:\base\*.h -current c:\current\*.h -baseplatformheaders C:\Symbian\9.1\S60_3rd_Beta\Epoc32\include -currentplatformheaders C:\Symbian\9.1\S60_3rd_Beta\Epoc32\include -replace c:\base\old.h c:\base\new.h

Q. what if I have one hundred files which has been replaced?

A.
command -commandfile settings.txt

inside CommandFile:
-baselinedir c:\base\*.h
-current c:\current\*.h
-baseplatformheaders C:\Symbian\9.1\S60_3rd_Beta\Epoc32\include
-currentplatformheaders C:\Symbian\9.1\S60_3rd_Beta\Epoc32\include
-replace
c:\base\old.h c:\base\new.h
c:\base\test.h c:\base\test2.h
c:\base\filehandle.h c:\base\file.h