File indexing completed on 2024-12-15 05:11:24

 #!/usr/bin/perl -w
 # vim:sw=2:et
 # tries to reduce the number of includes in KDE source files
 # (c) 2001-2007 Dirk Mueller <mueller@kde.org>
 
 use File::Basename;
 use Cwd;
 
 # declaration of useful subroutines
 sub find_src_includes($);
 sub find_fixable_sources ($);
 sub find_fixable_headers($);
 sub find_removable_includes ($);
 sub warn_before_modifying ($);
 sub remove_include ($$$);
 sub replace_include ($$$);
 sub replace_include_type ($$);
 sub fix_duplicates($);
 sub fix_compat_includes($);
 sub fix_unnecessary($);
 sub fix_include_type($);
 sub copy_file($$);
 sub process_source_file($);
 sub extract_gcc_error($);
 
 # some global variables
 $verbose = 0; # turns on debugging
 $modify = 0;  # if 1 it should try to fix the files as well
 $experimental = 0; # try&error if an include is obsolete (slow!!)
 @explicitfiles = (); # filled in if passing files on the command line
 
 # statistic variables
 $exp_success = 0;
 $exp_failure = 0;
 
 while (defined ($ARGV[0]))
 {
   $_ = shift;
   if (/^--help$|^-h$/)  {
     print "Usage: fixkdeincludes [--verbose | -v] [--experimental | -e ] [--modify | -m ]\n";
     exit 0;
   }
   elsif (/^--verbose$|^-v$/) {
     $verbose = 1;       # Oh is there a problem...?
   }
   elsif (/^--modify$|^-m$/) {
     $modify = 1;
   }
   elsif (/^--experimental$|^-e$/) {
     $modify = 1;
     $experimental = 1;
   }
   elsif (!/^-/) {
     push @explicitfiles, $_;
   }
 }
 
 $cppExt     = "(cpp|cc|cxx|C|c\\+\\+)";
 $hExt       = "(h|H|hh|hxx|hpp|h\\+\\+)";
 
 # list of compat headers. scroll down ... much of boring stuff here..
 %compatmap = (
  'qapp.h'        =>  "qapplication.h",
  'qarray.h'      =>  "qmemarray.h",
  'qbitarry.h'    =>  "qbitarray.h",
  'qbttngrp.h'    =>  "qbuttongroup.h",
  'qchkbox.h'     =>  "qcheckbox.h",
  'qclipbrd.h'    =>  "qclipboard.h",
  'qcollect.h'    =>  "qptrcollection.h",
  'qcollection.h' =>  "qptrcollection.h",
  'qcombo.h'      =>  "qcombobox.h",
  'qconnect.h'    =>  "qconnection.h",
  'qdatetm.h'     =>  "qdatetime.h",
  'qdrawutl.h'    =>  "qdrawutil.h",
  'qdstream.h'    =>  "qdatastream.h",
  'qfiledef.h'    =>  "private/qfiledefs_p.h",
  'qfiledlg.h'    =>  "qfiledialog.h",
  'qfileinf.h'    =>  "qfileinfo.h",
  'qfontdta.h'    =>  "qfontdata.h",
  'qfontinf.h'    =>  "qfontinfo.h",
  'qfontmet.h'    =>  "qfontmetrics.h",
  'qgrpbox.h'     =>  "qgroupbox.h",
  'qintcach.h'    =>  "qintcache.h",
  'qiodev.h'      =>  "qiodevice.h",
  'qlcdnum.h'     =>  "qlcdnumber.h",
  'qlined.h'      =>  "qlineedit.h",
  'qmenudta.h'    =>  "qmenudata.h",
  'qmetaobj.h'    =>  "qmetaobject.h",
  'qmlined.h'     =>  "qtmultilineedit.h",
  'qmsgbox.h'     =>  "qmessagebox.h",
  'qmultilinedit.h' =>  "qmultilineedit.h",
  'qobjcoll.h'    =>  "qobjectlist.h>\n\#include <qobjectdict.h",
  'qobjdefs.h'    =>  "qobjectdefs.h",
  'qpaintd.h'     =>  "qpaintdevice.h",
  'qpaintdc.h'    =>  "qpaintdevicedefs.h",
  'qpdevmet.h'    =>  "qpaintdevicemetrics.h",
  'qpmcache.h'    =>  "qpixmapcache.h",
  'qpntarry.h'    =>  "qpointarray.h",
  'qpopmenu.h'    =>  "qpopupmenu.h",
  'qprndlg.h'     =>  "qprintdialog.h",
  'qprogbar.h'    =>  "qprogressbar.h",
  'qprogdlg.h'    =>  "qprogressdialog.h",
  'qpsprn.h'      =>  "private/qpsprinter_p.h",
  'qpushbt.h'     =>  "qpushbutton.h",
  'qqueue.h'      =>  "qptrqueue.h",
  'qradiobt.h'    =>  "qradiobutton.h",
  'qrangect.h'    =>  "qrangecontrol.h",
  'qscrbar.h'     =>  "qscrollbar.h",
  'qsocknot.h'    =>  "qsocketnotifier.h",
  'qstack.h'      =>  "qptrstack.h",
  'qtabdlg.h'     =>  "qtabdialog.h",
  'qtstream.h'    =>  "qtextstream.h",
  'qwidcoll.h'    =>  "qwidgetlist.h>\n\#include <qwidgetintdict.h",
  'qwindefs.h'    =>  "qwindowdefs.h",
 
 # and now the KDE specific compat includes
  'kapp.h'        =>  "kapplication.h",
  'kstddirs.h'    =>  "kstandarddirs.h",
  'kuniqueapp.h'  =>  "kuniqueapplication.h",
  'ktmainwindow.h'=>  "kmainwindow.h",
  'kcolorbtn.h'   =>  "kcolorbutton.h",
  'kcolordlg.h'   =>  "kcolordialog.h",
  'kxmlgui.h'     =>  "kxmlguifactory.h",
  'kdebugclasses.h' => "kdebug.h",
 
 # Qt5/KF5 list
  'QtTest/QtTest' => "QtTest/QTest", # oops, don't include the full module, which includes all of QtCore
 );
 
 
 # now it starts to get interesting again
 
 # Look for source files in the given directory ($dir, first parameter)
 sub find_fixable_sources ($)
 {
   # for now I grep the directory (requires srcdir==builddir)
   # ideally it should read the CMakeLists.txt to find out the sources actually used
 
   my ( $dir ) = @_;
 
   opendir (DIR, "$dir") || die "Couldn't read '$dir'\n";
   my @sources = grep { /^.*\.$cppExt$/o } readdir(DIR);
   closedir(DIR);
 
   push @sources, "CMakeLists.txt" if ( -f "CMakeLists.txt" );
 
   print "found sources: [ " . join(' ', @sources) . " ] in $dir\n" if ($verbose);
 
   # prefix them with $dir
   my @retsources = ();
   foreach $source(@sources) {
     # skip platform-specific sources. We assume unix, so we skip win and mac
     next if ($source =~ /_mac.cpp/ || $source =~ /_win.cpp/);
     push @retsources, "$dir/$source";
   }
   
   return @retsources;
 }
 
 # Look for header files in the given directory ($dir, first parameter)
 sub find_fixable_headers ($)
 {
   # for now I grep the directory (requires srcdir==builddir)
   # actually it should read the Makefile and
   # find the _HEADERS tags that are put there by
 
   my ( $dir ) = @_;
 
   opendir (DIR, "$dir") || die "Couldn't read '$dir'\n";
   my @headers = grep { /^.*\.$hExt$/o } readdir(DIR);
   closedir(DIR);
   
   print "found headers: [ " . join(' ', @headers) . " ] in $dir\n" if ($verbose);
 
   # prefix them with $dir
   my @retheaders = ();
   foreach $source(@headers) {
     push @retheaders, "$dir/$source";
   }
   
   return @retheaders;
 }
 
 sub find_removable_includes ($)
 {
   my $srcfile = shift @_;
   open(SRC, "< $srcfile") || die "find_removable_includes: couldn't open '$srcfile'\n";
   
   my @includes = ();
 
   # we skip all includes that are somehow ifdefed
 
   my $cpplevel = 0;
   $cpplevel = -1 if ($srcfile=~m/^.*\.$hExt$/); # plan for header-protection #ifndef/#define/#endif
   while (<SRC>) {
     # support for removing libs from CMakeLists.txt
     if ($srcfile =~ /CMakeLists.txt/ && !/add_library/) {
       while (s/(KF5::\w+)//) {
         push @includes, $1;
       }
       next;
     }
     if ($_ =~ m/^\#if/) {
       $cpplevel = $cpplevel + 1;
       next;
     }
     if ($_ =~ m/^\#endif/) {
       $cpplevel = $cpplevel - 1;
       next;
     }
     if ($cpplevel == 0 && $_ =~ m/^\#include\s*[\"<](.*)[\">]\S*/) {
     # We only look for foo.h and q* and k*
     #if ($cpplevel == 0 && (($_ =~ m/^\#include\s*\"(\S+\.h)\"\S*/) || ($_ =~ m/^\#include\s*\<([qk]\S+)\>\S*/)))  {
       push @includes, $1;
       next;
     }
   }
   close SRC;
 
   print "No fixable includes found in $srcfile\n" if ($verbose and not @includes);
   print "found includes: [ " . join(' ', @includes) . " ]\n" if ($verbose and @includes);
 
   return @includes;
 }
 
 sub find_installed_headers($)
 {
   my $sdir = shift @_;
   my @includes = ();
 
   open(I, "<$sdir/CMakeLists.txt") || die "couldn't open $sdir/CMakeLists.txt $!";
 
   my $data = join('', <I>);
   $data =~ s/\s*\n/ /g;
 
   # now search for not installed headers
   while($data =~ /install\s*\(\s*FILES\s*([^()]*)\)/ig) {
   my $list = $1;
   foreach my $i (split (' ', $list)) {
       next if ($i !~ m/\.h$/);
       push @includes, $i;
     }
   }
   close(I);
   return @includes;
 }
 
 # first parameter: srcfile
 # second parameter: include to remove
 # third parameter is the duplicate level: this include is removed $level times
 sub remove_include ($$$)
 {
   my $srcfile = shift @_;
   my $include = quotemeta(shift @_);
   my $level = shift @_;
 
   die "$srcfile is not read/writeable!\n" if( ! -r $srcfile || ! -w $srcfile);
   open(I, "< $srcfile") or die "remove_include: couldn't open '$srcfile'\n";
   my @contents = <I>;
   close(I);
 
   # ok, CPU time doesn't count so we do it the lazy way
   # we should remove the last occurence of the include in the
   # file because in case it is a duplicate removing the first
   # one could make a difference. 
   my @revcontents = reverse @contents;
   @contents = ();
 
   # we skip all includes that are somehow ifdefed
   # note the logic is reversed because it operates
   # on reversed lines :)
   my $cpplevel = 0;
   $cpplevel = -1 if ($srcfile=~m/^.*\.$hExt$/); # plan for header-protection #ifndef/#define/#endif
   foreach $line (@revcontents) {
     if ($line =~ m/^\#if/) {
       $cpplevel = $cpplevel - 1;
       push @contents, $line;
       next;
     }
 
     if ($line =~ m/^\#endif/) {
       $cpplevel = $cpplevel + 1;
       push @contents, $line;
       next;
     }
 
     if ($srcfile =~ /CMakeLists.txt/ && $line !~ /add_library/) {
       # Remove library, keep the rest of the line
       $line =~ s/ $include//;
     } elsif ($level && $cpplevel == 0 &&
        (($line =~ m/^\#include\s*\"$include\"\S*/) || ($line =~ m/^\#include\s*\<$include\>\S*/)))  {
       $level = $level - 1;
       # skipping the line..
       next;
     }
 
     push @contents, $line;
   }
 
   # now we have the fixed contents in @contents, although in wrong order
   open(O, "> $srcfile") || die "remove_include: couldn't open '$srcfile' for writing\n";
   print O reverse @contents;
   close (O);
 }
 
 # first parameter: srcfile
 # second parameter: include to replace
 # third parameter the include file to replace it with
 sub replace_include ($$$)
 {
   my $srcfile = shift @_;
   my $include = quotemeta(shift @_);
   my $destinclude = shift @_;
 
   die "$srcfile is not read/writeable!\n" if( ! -r $srcfile || ! -w $srcfile);
   open(I, "< $srcfile") or die "replace_include: couldn't open '$srcfile'\n";
   my @contents = <I>;
   close(I);
 
   # ok, CPU time doesn't count so we do it the lazy way
   my @revcontents = reverse @contents;
   @contents = ();
 
   # we skip all includes that are somehow ifdefed
   # note the logic is reversed because it operates
   # on reversed lines :)
   my $cpplevel = 0;
   $cpplevel = -1 if ($srcfile=~m/^.*\.$hExt$/); # plan for header-protection #ifndef/#define/#endif
   foreach $line (@revcontents) {
     if ($line =~ m/^\#if/) {
       $cpplevel = $cpplevel - 1;
       push @contents, $line;
       next;
     }
 
     if ($line =~ m/^\#endif/) {
       $cpplevel = $cpplevel + 1;
       push @contents, $line;
       next;
     }
 
     if ($cpplevel == 0 &&
       (($line =~ m/^\#include\s*\"$include\"\S*/) || ($line =~ m/^\#include\s*\<$include\>\S*/)))
     {
       print "HAH! found $include to replace in $srcfile!\n" if($verbose);
       $line =~ s/(\#include\s*[\"<])$include([\">]\S*)/$1$destinclude$2/;
     }
 
     push @contents, $line;
   }
 
   # now we have the fixed contents in @contents
   open(O, "> $srcfile") || die "replace_include: couldn't open '$srcfile' for writing\n";
   print O reverse @contents;
   close (O);
 }
 
 # fixes #include <foo.h> -> #include "foo.h"
 sub replace_include_type ($$)
 {
   my ($srcfile, $include) = @_;
 
   die "$srcfile is not read/writeable!\n" if( ! -r $srcfile || ! -w $srcfile);
   open(I, "< $srcfile") or die "replace_include: couldn't open '$srcfile'\n";
   my @contents = <I>;
   close(I);
 
   grep(s/^(\#include)\s*<$include>(.*)$/$1 \"$include\"$2/, @contents);
 
   # now we have the fixed contents in @contents
   open(O, "> $srcfile") || die "replace_include: couldn't open '$srcfile' for writing\n";
   print O @contents;
   close (O);
 }
 
 sub fix_duplicates($)
 {
   my $srcfile = shift @_;
 
   return if ($srcfile =~ /CMakeLists.txt/);
 
   my @includes = &find_removable_includes($srcfile);
 
   my %inclMap = ();
 
   # initialize
   foreach $include (@includes) {
     $inclMap{$include} = 0;
   }
   
   # count number of occurences
   foreach $include (@includes) {
     $inclMap{$include} = $inclMap{$include} + 1;
   }
   
   # check for duplicates
   foreach $include (keys %inclMap) {
     next if $inclMap{$include} <= 1;
     
     print "$srcfile: duplicate level ". $inclMap{$include} .": ". $include ."\n";
 
     &remove_include($srcfile, $include, $inclMap{$include} - 1) if($modify);
   }
 }
 
 sub extract_gcc_error($)
 {
   my $out = shift;
  
  # print "out: $out\n";
 
   while ($out =~ m/^(.*?):([0-9]+):(.*)$/mg) # filename:lineno:message
   {
       my $field1 = $1 || "";
       my $field2 = $2 || "";
       my $field3 = $3 || "";
 
  #     print "f1: $field1, f2: $field2, f3: $field3\n";
 
       next if ($field3 =~ m/\s+warning:.*/);
       next if ($field3 =~ m/^\s*$/);
       return basename($field1);
   }
   return "BUG!";
 }
 
 sub fix_compat_includes($)
 {
   my $srcfile = shift @_;
 
   my @includes = &find_removable_includes($srcfile);
 
   my %inclMap = ();
 
   # initialize
   foreach $include (@includes) {
     $inclMap{$include} = 0;
   }
   
   # count number of occurences
   foreach $include (@includes) {
     $inclMap{$include} = $inclMap{$include} + 1;
   }
   
   # check for compat headers
   foreach $include (keys %inclMap) {
     if( defined $compatmap{$include}) {
       print "$srcfile: compat header: $include, to be replaced by ". $compatmap{$include} ."\n";
       &replace_include($srcfile, $include, $compatmap{$include}) if($modify);
     }
   }
 }
 
 sub fix_include_type($)
 {
   my $srcfile = shift @_;
   my $srcdir = dirname($srcfile);
 
   open(I, "<$srcfile") || die "couldn't open $srcfile in _fix_include_type";
   my @bracketincs = grep s/^\s*\#include\s*<([^>]+)>\s*$/$1/, <I>;
   close(I);
 
   foreach my $include (@bracketincs) {
     next if (!(-r "$srcdir/$include"));
     next if (grep (/^$include$/, @instheaders));
     next if ($include eq "config.h"); # oh don't get me started on that
 
     print "$srcfile: #include <$include> should use #include \"...\"\n";
     &replace_include_type($srcfile, $include) if($modify);
   }
 }
 
 # copies a file from src to dest, overwrites destination if exists
 sub copy_file($$)
 {
   my $src = shift(@_);
   my $dst = shift(@_);
 
   open(I, "< $src") or die "copy_file: can't open $src for input\n";
   my @fcontents = <I>;
   close(I);
   open(O, "> $dst") or die "copy_file: can't open $dst for output\n";
   print O @fcontents;
   close(O);
 }
 
 # interrupt handler for fix_unnecessary
 sub sighandler_fix_unnecessary()
 {
   my($sig) = @_;
   print "Caught a SIG$sig--shutting down after restoring $srcfile\n";
   chdir($srcdir);
   unlink $srcfile || warn "couldn't unlink $srcfile";
   rename $localbackup, $srcfile || warn "couldn't rename $localbackup to $srcfile";
   system("touch $srcfile") if ($srcfile =~ /CMakeLists.txt/);
   exit(1);
 }
 
 sub fix_unnecessary($)
 {
   local $srcfile = shift @_;
   local $srcdir = dirname($srcfile);
 
   # find canonical path for srcdir
   my $origdir = cwd;
   chdir($srcdir);
   $srcdir = cwd;
   print "srcdir=$srcdir\n" if($verbose);
 
   my $builddir = $srcdir;
   my $makecmd = "make";
   if (defined $ENV{"OBJ_REPLACEMENT"})
   {
     # we have to use sed here, because perl can't do s#a#b#
     $builddir = `echo $srcdir | sed -e "\$OBJ_REPLACEMENT"`;
     chomp $builddir;
     $makecmd = "makeobj";
   }
   print "builddir=$builddir\n" if($verbose);
 
   my $tot = $exp_success + $exp_failure;
   print "=============== $srcfile (successes: $exp_success; total: $tot)\n";
 
   $srcfile = basename($srcfile);
 
   # first figure out some details
   my @includes = &find_removable_includes($srcfile);
 
   my $blanksrc = $srcfile;
   $blanksrc =~ s/(.*)\.[^\.]+/$1/;
 
   print "Checking for initial compilation: ";
   chdir($builddir);
   my $objextension = "BUG";
   my $lastcommand = "";
   if($srcfile =~ /\.$hExt$/o || $srcfile =~ /CMakeLists.txt/) {
     $lastcommand = "$makecmd all";
     $output = `$lastcommand 2>&1`;
     $objextension = "all" if ( 0 == ($? >> 8));
   }
   else {
     unlink "$blanksrc.o";
     $lastcommand = "$makecmd $blanksrc.o";
     $output = `$lastcommand 2>&1`;
     $objextension = ".o" if ( 0 == ($? >> 8));
   }
   if($objextension eq "BUG") {
     warn "can't figure out right compile command for $srcfile :-(\n" .
          "??? unused, or didn't compile in the first place?\n" .
          "Tried: $lastcommand, and got:\n" .
          "$output";
     chdir($origdir);
     warn "Aborting!\n";
     exit 1;
   }
 
   print "worked with $objextension\n";
 
   my $initialwarnings = grep(/warning:/, $output);
   print "got warnings: $initialwarnings\n" if ($verbose);
 
   # now try to drop some includes 
   foreach $include (@includes) {
     # kdatastream is special because
     # it will break the application if removed even
     # if it continues to compile
     next if( $include eq "kdatastream.h");
     # I also like to have kdebug.h still in
     # so that it's easy to add kDebug calls
     next if( $include eq "kdebug.h");
     # avoid this one as it might cause
     # certain code parts to be disabled from compilation
     next if( $include eq "qmodules.h");
     # don't remove this one either. causes conditional
     # code to be compiled incorrectly
     next if( $include eq "kdeversion.h");
     # don't remove the config.h include
     # conditional code may depend on this file
     next if( $include eq "config.h");
     # check if it is its own header file
     my $blankhdr = $include;
     $blankhdr =~ s/(.*)\.[^\.]+/$1/;
     next if ($blankhdr eq $blanksrc);   
 
     chdir($srcdir);
 
     local $localbackup = $srcfile . "#fixkdeincludes";
 
     # preserve timestamp if possible for CVS
     unlink $localbackup;
     rename $srcfile, $localbackup;
     copy_file($localbackup, $srcfile);
 
     # revert to backup in case of interrupt (Ctrl+C)
     $SIG{'INT'} = \&sighandler_fix_unnecessary;
 
     # check if it still compiles
     if($verbose) {
       chdir($builddir);
       # testing headers? need to compile everything
       if($objextension eq "all") {
         # wait a second for makefile timestamp comparisons
         sleep 1;
         `$makecmd all 2>&1`;
       }
       else {
         unlink "$blanksrc$objextension";
         `$makecmd $blanksrc$objextension 2>&1`;
       }
       die "unexpected error $output\nexitcode=" . ($? >> 8) if($? >> 8);
       chdir($srcdir);
     }
 
     # duplicates have to be nuked here , so it will be dropped maximum once
     print "trying without $include: ";
     &remove_include($srcfile, $include, 1);
 
     chdir($builddir);
 
     # try if it compiles
     if($objextension eq "all") {
       sleep 1;
       $output=`$makecmd $objextension 2>&1`;
     }
     else {
       unlink "$builddir/$blanksrc$objextension";
       $output=`$makecmd $blanksrc$objextension 2>&1`;
     }
     my $retcode = ($? >> 8);
     #print "retcode=$retcode\n$output" if ($verbose);
 
     my $warnings = grep(/warning:/, $output);
     print "got warnings: $warnings\n" if ($verbose);
 
     chdir($srcdir);
     if($retcode == 0 and $warnings == $initialwarnings) {
       # wow, it worked, lets continue!
       print "SUCCESS!\n";
       $SIG{'INT'} = 'DEFAULT';
       unlink $localbackup;
       $exp_success = $exp_success + 1;
     }
     else {
       # is this a fixable error?
       if($objextension eq "all" and 
          &extract_gcc_error($output) ne $srcfile) {
         print "failed (error in " . &extract_gcc_error($output) . ")\n";
         # FIXME: implement fixup of the compilation error
         # so that we can be much more agressive in removing
         # unneeded includes from headers
       }
       else
       {
         # better luck next time
         if ($retcode == 0 and $warnings != $initialwarnings) {
           print "FAILED, introduces " . ($warnings - $initialwarnings) . " new warnings\n";
         } else {
           print "FATALLY failed\n";
         }
       }
       unlink $srcfile;
       rename $localbackup, $srcfile;
       system("touch $srcfile") if ($srcfile =~ /CMakeLists.txt/);
       $SIG{'INT'} = 'DEFAULT';
 
       $exp_failure = $exp_failure + 1;
     }
   }
 
   print "\n";
 
   chdir($origdir);
 }
 
 sub process_source_file($)
 {
   local $file = shift @_;
   my $pure = basename($file);
   print "Checking: $file\n" if($verbose);
   #&fix_include_type($file);
   &fix_compat_includes($file);
   &fix_duplicates($file);
   &fix_unnecessary($file) if ($experimental && !grep (/^$pure$/, @instheaders));
   print "\n" if ($verbose);
 }
 
 sub check_for_cmake_srcdir($)
 {
   my $dir = shift;
 
   return 0 if !( -r "$dir/CMakeLists.txt");
   return 1 if !( -r "$dir/CMakeFiles");
 
   # ok, now it is either srcdir with srcdir==builddir, or it is builddir,
   # which we don't want. 
 
   open(I, "<$dir/Makefile") || die "couldn't read $dir/Makefile";
   while(<I>) {
     if(/^srcdir\s*=\s*(\S+)/) {
       close(I);
 
       if($1 ne ".") {
         print "Skipping build dir: $dir\n" if($verbose);
         return 0;
       }
       return 1;
     }
   }
   
   close(I);
   # ok, this makefile isn't generated by cmake, we don't want that
   return 0;
 }
 
 sub init_compat_includelist()
 {
   # We identify identical headers by their md5sum
   open(L, "md5sum /usr/include/Qt{3Support,Core,DBus,Gui,Network," .
           "OpenGL,Script,Sql,Svg,Test,Xml}/* | sort |") || return;
 
   my $oldsum = "<invalid>";
   my $oldname;
 
   while(<L>) {
     m/^(\S+)\s+(\S+)/;
 
     my ($sum, $fname) = ($1, $2);
 
     $fname = $1 if ($fname =~ /\/(Qt.*)/); # remove /usr/include/, keep only QtFoo/Bar
 
     if ($oldsum eq $sum) {
       $compatmap{$fname} = $oldname;
       if ($fname =~ /\/(.*)/) {
           $compatmap{$1} = $oldname;
       }
       next;
     }
 
     $oldname = $fname;
     $oldsum = $sum;
   }
   close(L);
 }
 
 #############################################################################
 # here is the main logic
 #
 
 &init_compat_includelist();
 
 # warn about modified files - TODO port to git diff --quiet, but the exit code seems broken
 #if($modify) {
 #`cvscheck | grep '^[MmC]'`;
 #print "WARNING: you have pending local changes. You might commit them by accident!\n\n" if($? >> 8 == 0);
 #}
 
 if($experimental) {
   print "WARNING: The experimental mode is indeed experimental.\n";
   print "It tries to reduce includes by testing if it would compile\n";
   print "without a particular include. It might introduce subtle bugs\n";
   print "or break compilation for make check or make final.\n\n";
   print "This operation mode is known to be unsafe. You've been warned.\n";
 }
 
 # process files from the command line, if any
 if ( $#explicitfiles >= 0 ) {
   foreach $file( @explicitfiles ) {
     &process_source_file( $file );
   }
   exit 0;
 }
 
 # first generate a list of subdirectories
 @dirlist = ();
 push @dirlist, "." if (&check_for_cmake_srcdir("."));
 die "current directory isn't srcdir!" if (!scalar @dirlist);
 foreach $dir ( @dirlist ) {
  opendir (DIR, "$dir") || warn "Couldn't read '$dir'";
  my $subdir = "";
  while( $subdir = readdir(DIR)) {
    next if ($subdir =~ /^\./);
    next if !( -d "$dir/$subdir");
    next if (! &check_for_cmake_srcdir("$dir/$subdir"));
 
    push @dirlist, "$dir/$subdir";
  }
  closedir(DIR);
 }
 
 # now iterate over all subdirs
 foreach $dir(@dirlist) {
 
   # check if this directory wants not to be fixed
   if(open(M, "$dir/CMakeLists.txt")) {
     my @mcontents = grep /(\-UQT_NO_COMPAT|\-UKDE_NO_COMPAT)/, <M>;
     close(M);
     if ( @mcontents ) {
       print "Skipping directory: $dir\n";
       next;
     }
   }
 
   @headers = &find_fixable_headers($dir);
   @instheaders = &find_installed_headers($dir);
   foreach $file(@headers) {
     &process_source_file($file);
   }
   @sources = &find_fixable_sources($dir);
   foreach $file(@sources) {
     &process_source_file($file);
   }
 }