#!@-PERL-@ -w
# -*- perl -*-
#
# This perl script is used to make a patch for your GnuCash
# development work. All patches should be submitted to the
# mailing list gnucash-patches@gnucash.org. For more info
# consult the README.
#
# This script requires the programs 'makepatch', 'gzip',
# 'diff', and 'uuencode'.
#
# Author: Dave Peticolas <dave@krondo.com>

use strict;

use File::Basename;

###########################################################
# This section must be configured for your own setup.     #
###########################################################

# The directory with the original gnucash sources
my $old = undef;

chomp(my $cwd = `pwd`);

my ($new, $gnc_home) = fileparse($cwd);

###########################################################
# This section should not need to be modified.            #
###########################################################

# Allow the user to override the defaults with evnt vars.

if($ENV{'GNC_MAKEPATCH_OLD_DIR'}) {
  $old = $ENV{'GNC_MAKEPATCH_OLD_DIR'};
}

if($ENV{'GNC_MAKEPATCH_NEW_DIR'}) {
  $new = $ENV{'GNC_MAKEPATCH_NEW_DIR'};
}

if($ENV{'GNC_MAKEPATCH_HOME_DIR'}) {
  $gnc_home = $ENV{'GNC_MAKEPATCH_HOME_DIR'};
}


# Switch to the home directory
print "Changing directory to $gnc_home\n";
chdir $gnc_home or die "Can't cd!\n";

if (not defined($old)) {
  if (not -f "$new/CVS/Root") {
    print "Source not checked out of CVS and no \$old set.  Quitting...\n";
    exit(1);
  }
  if (not -d "tmp") {
    mkdir "tmp";
  }
  chdir "tmp";
  system("cvs -d `cat ../$new/CVS/Root` co gnucash");
  chdir "..";
  $old = "tmp/gnucash";
}

chdir $gnc_home . "/" . $new or die "Can't cd!\n";
# Start out with our basic makepatch arguments
my @args = ('-verbose', '-diff', 'diff -u', '-exclude-vc');

# Add in the exclude patterns from the __DATA__ section
push_exclusions(\@args);

sub push_exclusions {
  my $args = shift;
  foreach my $pat (<DATA>) {
    chomp($pat);
    push(@{$args}, '-exclude', $pat) if $pat;
  }
  my @cvsignores = `find . -name '.cvsignore'`;
  foreach my $one_ignore (@cvsignores) {
    my ($name, $path) = fileparse($one_ignore);
    open (IG, $one_ignore);
    foreach my $fl (<IG>) {
      chomp $fl;
      $path =~ s/^\.\///;
      push(@{$args}, '-exclude', $path . $fl) if $fl;
    }
    close (IG);
  }
}
# Add the from and to directories for makepatch
push(@args, $old, $new);
print "Arguments are: " . join("; ", @args) . "\n";

chdir $gnc_home or die "Can't cd!\n";

# Erase the old files
#unlink('gnc.diff', 'gnucash.diff.gz', 'gnucash.diff.gz.uue');

if (not -d "diffs") {
  mkdir "diffs";
}

my $date = `date '+%s'`;
chomp($date);
my $who = `whoami`;
chomp($who);

my $outfilename = "gnucash-$date-$who.diff";

# Invoke makepatch with standard out redirected to 'gnucash.diff'
open(OLDOUT, ">&STDOUT");
open(STDOUT, "> diffs/$outfilename") || die "Can't redirect stdout";
system('makepatch', @args);
close(STDOUT);
open(STDOUT, ">&OLDOUT");
print "makepatch done\n";

# Compress the patch
if (-f "diffs/$outfilename") {
  system("gzip", "-9vf", "diffs/$outfilename");
}

# UU encode the compressed patch
# 'gnucash.diff.gz.uue' is the file you send.
if (-f "diffs/$outfilename.gz") {
  system("uuencode diffs/$outfilename.gz $outfilename.gz > diffs/$outfilename.gz.uue");
}

print "diffs/$outfilename.gz.uue\n";

exit(0);

__DATA__

#*#
*.a
*.bak
*.bin
*.diff
*.diffs
*.gmo
*.lo
*.log
*.mo
*.moc
*.o
*.orig
*.patch
*.rej
*.tar.gz
*.wrap
*.xac.*.xac
*~
.#*