#!/usr/bin/perl
	eval "exec perl -S $0 $*"
		if $running_under_some_shell;

# $Id: patclean.SH 1 2006-08-24 12:32:52Z rmanfredi $
#
#  Copyright (c) 1991-1997, 2004-2006, Raphael Manfredi
#  
#  You may redistribute only under the terms of the Artistic Licence,
#  as specified in the README file that comes with the distribution.
#  You may reuse parts of this distribution only within the terms of
#  that same Artistic Licence; a copy of which may be found at the root
#  of the source tree for dist 4.0.
#
# $Log: patclean.SH,v $
# Revision 3.0.1.2  1994/01/24  14:30:17  ram
# patch16: now prefix error messages with program's name
# patch16: added ~/.dist_profile awareness
#
# Revision 3.0.1.1  1993/08/19  06:42:33  ram
# patch1: leading config.sh searching was not aborting properly
#
# Revision 3.0  1993/08/18  12:10:41  ram
# Baseline for dist 3.0 netwide release.
#

$version = '3.5';
$patchlevel = '0';

$RCSEXT = ',v' unless $RCSEXT;

$progname = &profile;			# Read ~/.dist_profile
require 'getopts.pl';
&usage unless $#ARGV >= 0;
&usage unless &Getopts("ahnmV");

if ($opt_V) {
	print STDERR "$progname $version PL$patchlevel\n";
	exit 0;
} elsif ($opt_h) {
	&usage;
}

$RCSEXT = ',v' unless $RCSEXT;
$ENV{'DIST'} = '/dev/null';	# Disable ~/.dist_profile

chop($pwd = `pwd`) unless -f '.package';
until (-f '.package') {
	die "$progname: no .package file!  Run packinit.\n" unless $pwd;
	chdir '..' || die "$progname: can't cd ..: $!\n";
	$pwd =~ s|(.*)/(.*)|$1|;
	$prefix = $2 . '/' . $prefix;
}
if ($prefix) {
	for (@ARGV) {
		s/^/$prefix/ unless m|^[-/]|;
	}
}

# We now are at the top level

&readpackage;

if ($opt_n) {
	&newer;				# Look for files newer than patchlevel.h
} elsif ($opt_a) {
	open(MANI,"MANIFEST.new") || die "$progname: can't read MANIFEST.new: $!\n";
	@ARGV = ();
	while (<MANI>) {
		s|^\./||;
		next if m|^patchlevel.h|;		# This file is built by hand
		chop;
		($_) = split(' ');
		next if -d;
		push(@ARGV,$_);
	}
	close MANI;
} elsif ($opt_m) {
	open(MODS,"bugs/.mods$bnum") || die "$progname: no modification found.\n";
	@ARGV = ();
	while (<MODS>) {
		next if m|^patchlevel.h$|;		# This file is built by hand
		chop;
		($_) = split(' ');
		push(@ARGV,$_);
	}
    close MODS;
}

# Set a temporary file for check outs
$TMPFILE = "/tmp/cl$$.tmp";

# Now loop over each file specified, doing a 'rcsclean'
foreach $file (@ARGV) {
	if (-f $file) {
		$files = &rcsargs($file);
		@files = split(' ', $files);
		$rlog = `rlog -rlastpat- $files 2>&1`;
		($revs) = ($rlog =~ /selected revisions: (\d+)/);
		if (!$revs) {
			print "$progname: $file has never been checked in--checking in...\n";
			system 'perl', '-S', 'patcil', '-p', $file;
			$revs = 2;		# At least null trunk + new fresh revision
		}
		# Look whether there is a branch
		if ($revs == 1) {
			$rlog = `rlog -r$revbranch $files 2>&1`;
			($revs) = ($rlog =~ /selected revisions: (\d+)/);
			$revs++;	# add the base revision
		}
		# We must only give the name of the RCS revision file, i.e. $files[1]
		if ($revs == 1) {
			system "co -q -p$baserev $files[1] > $TMPFILE";
		} else {
			system "co -q -p$revbranch $files[1] > $TMPFILE";
		}
		if ($? == 0) {
			system 'cmp', '-s', $file, $TMPFILE;
			if ($? == 0) {
				unlink $file;
				print "$progname: $file removed.\n";
			} else {
				# Check in file and make sure all was ok
				system 'perl', '-S', 'patcil', '-p', $file;
				system "co -q -p$revbranch $files[1] > $TMPFILE";
				if ($? == 0) {
					system 'cmp', '-s', $file, $TMPFILE;
					if ($? == 0) {
						unlink $file;
						print "$progname: $file removed.\n";
					} else {
						print "$progname: $file NOT removed.\n";
					}
				} else {
					print "$progname: could not check out--$file NOT removed.\n";
				}
			}
		} else {
			print "$progname: no revision--$file NOT removed.\n";
		}
	}
}

unlink "$TMPFILE";

sub usage {
	print STDERR <<EOM;
Usage: $progname [-ahnmV] [filelist]
  -a : all the files in MANIFEST.new
  -h : print this message and exit
  -n : all the files newer than patchlevel.h
  -m : all the modified files (which have been patciled)
  -V : print version number and exit
EOM
	exit 1;
}

sub newer {
	open(FIND, "find . -type f -newer patchlevel.h -print | sort |") ||
	die "Can't run find.\n";
	open(NEWER,">.newer") || die "Can't create .newer.\n";
	open(MANI,"MANIFEST.new");
	while (<MANI>) {
		($name,$foo) = split;
		$mani{$name} = 1;
	}
	close MANI;
	while (<FIND>) {
	s|^\./||;
	chop;
	next if m|^MANIFEST|;
	next if m|^PACKLIST$|;
	if (!$mani{$_}) {
		next if m|^MANIFEST.new$|;
		next if m|^Changes$|;
		next if m|^Wanted$|;
		next if m|^.package$|;
		next if m|^bugs|;
		next if m|^users$|;
		next if m|^UU/|;
		next if m|^RCS/|;
		next if m|/RCS/|;
		next if m|^config.sh$|;
		next if m|/config.sh$|;
		next if m|^make.out$|;
		next if m|/make.out$|;
		next if m|^all$|;
		next if m|/all$|;
		next if m|^core$|;
		next if m|/core$|;
		next if m|^toto|;
		next if m|/toto|;
		next if m|^\.|;
		next if m|/\.|;
		next if m|\.o$|;
		next if m|\.old$|;
		next if m|\.orig$|;
		next if m|~$|;
		next if $mani{$_ . ".SH"};
		next if m|(.*)\.c$| && $mani{$1 . ".y"};
		next if m|(.*)\.c$| && $mani{$1 . ".l"};
		next if (-x $_ && !m|^Configure$|);
	}
	print NEWER $_,"\n";
	}
	close FIND;
	close NEWER;
	print "Please remove unwanted files...\n";
	sleep(2);
	system '${EDITOR-vi} .newer';
	die "Aborted.\n" unless -s '.newer' > 1;
	@ARGV = split(' ',`cat .newer`);
}

sub readpackage {
	if (! -f '.package') {
		if (
			-f '../.package' ||
			-f '../../.package' ||
			-f '../../../.package' ||
			-f '../../../../.package'
		) {
			die "Run in top level directory only.\n";
		} else {
			die "No .package file!  Run packinit.\n";
		}
	}
	open(PACKAGE,'.package');
	while (<PACKAGE>) {
		next if /^:/;
		next if /^#/;
		if (($var,$val) = /^\s*(\w+)=(.*)/) {
			$val = "\"$val\"" unless $val =~ /^['"]/;
			eval "\$$var = $val;";
		}
	}
	close PACKAGE;
}

sub rcsargs {
	local($result) = '';
	local($_);
	while ($_ = shift(@_)) {
		if ($_ =~ /^-/) {
			$result .= $_ . ' ';
		} elsif ($#_ >= 0 && do equiv($_,$_[0])) {
			$result .= $_ . ' ' . $_[0] . ' ';
			shift(@_);
		} else {
			$result .= $_ . ' ' . do other($_) . ' ';
		}
	}
	$result;
}

sub equiv {
	local($s1, $s2) = @_;
	$s1 =~ s|.*/||;
	$s2 =~ s|.*/||;
	if ($s1 eq $s2) {
		0;
	} elsif ($s1 =~ s/$RCSEXT$// || $s2 =~ s/$RCSEXT$//) {
		$s1 eq $s2;
	} else {
		0;
	}
}

sub other {
	local($s1) = @_;
	($dir,$file) = ('./',$s1) unless local($dir,$file) = ($s1 =~ m|(.*/)(.*)|);
	$dir = $TOPDIR . $dir if -d $TOPDIR . "$dir/RCS";
	local($wasrcs) = ($file =~ s/$RCSEXT$//);
	if ($wasrcs) {
		`mkdir $dir` unless -d $dir;
		$dir =~ s|RCS/||;
	} else {
		$dir .= 'RCS/';
		`mkdir $dir` unless -d $dir;
		$file .= $RCSEXT;
	}
	"$dir$file";
}

# Perform ~name expansion ala ksh...
# (banish csh from your vocabulary ;-)
sub tilda_expand {
	local($path) = @_;
	return $path unless $path =~ /^~/;
	$path =~ s:^~([^/]+):(getpwnam($1))[$[+7]:e;			# ~name
	$path =~ s:^~:$ENV{'HOME'} || (getpwuid($<))[$[+7]:e;	# ~
	$path;
}

# Set up profile components into %Profile, add any profile-supplied options
# into @ARGV and return the command invocation name.
sub profile {
	local($profile) = &tilda_expand($ENV{'DIST'} || '~/.dist_profile');
	local($me) = $0;		# Command name
	$me =~ s|.*/(.*)|$1|;	# Keep only base name
	return $me unless -s $profile;
	local(*PROFILE);		# Local file descriptor
	local($options) = '';	# Options we get back from profile
	unless (open(PROFILE, $profile)) {
		warn "$me: cannot open $profile: $!\n";
		return;
	}
	local($_);
	local($component);
	while (<PROFILE>) {
		next if /^\s*#/;	# Skip comments
		next unless /^$me/o;
		if (s/^$me://o) {	# progname: options
			chop;
			$options .= $_;	# Merge options if more than one line
		}
		elsif (s/^$me-([^:]+)://o) {	# progname-component: value
			$component = $1;
			chop;
			s/^\s+//;		# Trim leading and trailing spaces
			s/\s+$//;
			$Profile{$component} = $_;
		}
	}
	close PROFILE;
	return unless $options;
	require 'shellwords.pl';
	local(@opts);
	eval '@opts = &shellwords($options)';	# Protect against mismatched quotes
	unshift(@ARGV, @opts);
	return $me;				# Return our invocation name
}