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#!/usr/bin/perl
	eval 'exec perl -S $0 ${1+"$@"}'
		if $running_under_some_shell;

# $Id: patcol.SH 31 2010-03-06 20:15:24Z 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: patcol.SH,v $
# Revision 3.0.1.3  1994/01/24  14:30:25  ram
# patch16: now prefix error messages with program's name
# patch16: added ~/.dist_profile awareness
#
# Revision 3.0.1.2  1993/08/24  12:16:30  ram
# patch3: new -S option for snapshot check-outs
#
# Revision 3.0.1.1  1993/08/19  06:42:34  ram
# patch1: leading config.sh searching was not aborting properly
#
# Revision 3.0  1993/08/18  12:10:42  ram
# Baseline for dist 3.0 netwide release.
#

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

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

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

$RCSEXT = ',v' unless $RCSEXT;
$NEWMANI = 'MANIFEST.new' unless $NEWMANI = $opt_f;

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 ..: $!";
	$pwd =~ s|(.*)/(.*)|$1|;
	$prefix = $2 . '/' . $prefix;
}
if ($prefix) {
	for (@ARGV) {
		s/^/$prefix/ unless m|^[-/]|;
	}
}

# We now are at the top level

&readpackage;
undef $opt_C unless -f $copyright;
&copyright'init($copyright) if $opt_C;
&makedir($opt_d) if $opt_d;

undef $opt_c unless $opt_d;		# Disable -c if not -d
undef $opt_R unless $opt_d;		# Disable -R if not -d
push(@sw, '-q') if $opt_s;		# Let RCS work quietly

if ($opt_n) {
	&newer;				# Look for files newer than patchlevel.h
} elsif ($opt_a) {
	open(MANI, $NEWMANI) || die "No $NEWMANI found.\n";
	@ARGV = ();
	while (<MANI>) {
		s|^\./||;
		next if m|^patchlevel.h| && !$opt_d;	# 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;
		($_) = split(' ');
		next if -d;
		push(@ARGV,$_);
	}
	close MODS;
} elsif ($opt_S) {
	&readsnapshot($opt_S);
	foreach $file (sort keys %Snap) {
		push(@ARGV, $file);
	}
}

# Now loop over each file specified, doing a 'co -l'
foreach $file (@ARGV) {
	if ($opt_c && -f $file) {
		&copy_file($file, $opt_d);
		next;
	}
	# Continue only if file does not exist or option -d was used.
	if (! -f $file || $opt_d) {
		$files = &rcsargs($file);
		@files = split(' ', $files);
		if ($opt_S && ($rev = $Snap{$file}) ne '') {	# Use snapshot file
			&col($rev);
			next;
		}
		$rlog = `rlog -rlastpat- $files 2>&1`;
		($revs) = ($rlog =~ /selected revisions: (\d+)/);
		if (!$revs) {
			if ($opt_d) {
				&copy_file($file, $opt_d);
			} else {
				print STDERR "$progname: $file has never been checked in\n";
			}
		} else {
			# Look whether there is a branch
			if ($revs == 1) {
				$rlog = `rlog -r$revbranch $files 2>&1`;
				($revs) = ($rlog =~ /selected revisions: (\d+)/);
				$revs++;	# add the base revision (trunk)
			}
			if ($revs == 1) {
				&col($baserev);
			} else {
				&col($revbranch);
			}
		}
			
	}
}

# Run co -l on @files, unlock file if it fails and retry.
# If '-d' option was used, we check out in the specified
# directory, after having made all the necessary directories
# in the path name (which should be relative to the top).
sub col {
	local($rev) = shift;	# Revision to be checked out.
	if (! $opt_d) {
		if (system 'co',  "-l$rev", @sw, @files) {
			print "$progname: unlocking and trying again...\n" unless $opt_s;
			system 'rcs', '-u', @sw, @files;
			system 'co', "-l$rev", @sw, @files unless $?;
		}
	} else {
		local($name) = $files[0];	# First element is file name
		$_ = $name;
		s|(.*)/.*|\1| && &makedir("$opt_d/$_");
		if ($opt_C) {
			&copyright'expand("co -p @sw -r$rev $files[1]", "$opt_d/$name");
		} else {
			system "co -p -r$rev @sw $files[1] > $opt_d/$name";
		}
		system 'perl', '-pi', '-e', 's|Lock[e]r:.*\$|\$|;', "$opt_d/$name"
			if $opt_R;
		# If RCS file has x bits set, add them on new file
		-x $files[1] && chmod(0755, "$opt_d/$name");
	}
}

# Copy file into directory, eventually performing copyright expansion...
sub copy_file {
	local($file, $dir) = @_;
	local($base) = $file =~ m|^(.*)/.*|;
	&makedir("$dir/$base");
	if ($opt_C) {
		&copyright'expand("cat $file", "$dir/$file");
	} else {
		system 'cp', "$file", "$dir/$file";
	}
	system 'perl', '-pi', '-e', 's|Lock[e]r:.*\$|\$|;', "$dir/$file" if $opt_R;
	-x $file && chmod(0755, "$dir/$file");
	print "$progname: $file has been copied\n" unless $opt_s;
}

sub usage {
	print STDERR <<EOM;
Usage: $progname [-achnmsCRV] [-d directory] [-f mani] [-S snap] [filelist]
  -a : all the files in MANIFEST.new (see also -f)
  -c : copy files if checked-out copy exists (only when -d)
  -d : check out (or copy) in the specified directory
  -f : use supplied file instead of 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)
  -s : silent mode
  -C : perform copyright expansion on checked out (or copied) file
  -R : strip out RCS \$Locker marker from checked-out file (only when -d)
  -S : use snapshot file to determine file list and RCS revisions
  -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";
}

package copyright;

# Read in copyright file
sub init {
	local($file) = @_;		# Copyright file
	undef @copyright;
	open(COPYRIGHT, $file) || die "Can't open $file: $!\n";
	chop(@copyright = <COPYRIGHT>);
	close COPYRIGHT;
}

# Reset the automaton for a new file.
sub reset {
	$copyright_seen = @copyright ? 0 : 1;
	$marker_seen = 0;
}

# Filter file, line by line, and expand the copyright string. The @COPYRIGHT@
# symbol may be preceded by some random comment. A leader can be defined and
# will be pre-pended to all the input lines.
sub filter {
	local($line, $leader) = @_;		# Leader is optional
	return $leader . $line if $copyright_seen || $marker_seen;
	$marker_seen = 1 if $line =~ /\$Log[:\$]/;
	$copyright_seen = 1 if $line =~ /\@COPYRIGHT\@/;
	return $leader . $line unless $copyright_seen;
	local($comment, $trailer) = $line =~ /^(.*)\@COPYRIGHT\@\s*(.*)/;
	$comment = $leader . $comment;
	$comment . join("\n$comment", @copyright) . "\n";
}

# Filter output of $cmd redirected into $file by expanding copyright, if any.
sub expand {
	local($cmd, $file) = @_;
	if (@copyright) {
		open(CMD,"$cmd|") || die "Can't start '$cmd': $!\n";
		open(OUT, ">$file") || die "Can't create $file: $!\n";
		&reset;
		local($_);
		while (<CMD>) {
			print OUT &filter($_);
		}
		close OUT;
		close CMD;
	} else {
		system "$cmd > $file";
		die "Command '$cmd' failed!" if $?;
	}
}

package main;

# Make directories for files
# E.g, for /usr/lib/perl/foo, it will check for all the
# directories /usr, /usr/lib, /usr/lib/perl and make
# them if they do not exist.
sub makedir {
    local($_) = shift;
    local($dir) = $_;
    if (!-d && $_ ne '') {
        # Make dirname first
        do makedir($_) if s|(.*)/.*|\1|;
		mkdir($dir, 0700) if ! -d $dir;
    }
}

# Read snapshot file and build %Snap, indexed by file name -> RCS revision
sub readsnapshot {
	local($snap) = @_;
	open(SNAP, $snap) || warn "Can't open $snap: $!\n";
	local($_);
	local($file, $rev);
	while (<SNAP>) {
		next if /^#/;
		($file, $rev) = split;
		$Snap{$file} = "$rev";
	}
	close SNAP;
}

# 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
}