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

# $Id: patsnap.SH,v 3.0.1.2 1994/01/24 14:33:08 ram Exp $
#
#  Copyright (c) 1991-1993, 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 3.0.
#
# $Log: patsnap.SH,v $
# Revision 3.0.1.2  1994/01/24  14:33:08  ram
# patch16: now prefix error messages with program's name
# patch16: added ~/.dist_profile awareness
#
# Revision 3.0.1.1  1993/08/24  12:22:08  ram
# patch3: created
#

$version = '3.0';
$patchlevel = '70';

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

$SNAPSHOT = 'SNAPSHOT';		# Default snapshot file name

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

&readpackage;

$RCSEXT = ',v' unless $RCSEXT;
$TOPDIR = '';			# We are at the top-level directory
$SNAPSHOT = $opt_o if $opt_o;

if ($opt_a) {
	open(MANI,"MANIFEST.new") || die "$progname: can't read MANIFEST.new: $!\n";
	@ARGV = ();
	while (<MANI>) {
		chop;
		s|^\./||;
		next if m|^patchlevel.h|;		# Special file
		($_) = split(' ');
		next if -d;
		push(@ARGV,$_);
	}
	close MANI;
}

open(SNAPSHOT, ">$SNAPSHOT") || die "$progname: can't create $SNAPSHOT: $!\n";

foreach $file (@ARGV) {
	$files = &rcsargs($file);
	@files = split(' ',$files);
	$revs=0;
	$rlog = `rlog -r$baserev -r$revbranch $files 2>&1`;
	($revs) = ($rlog =~ /selected revisions: (\d+)/);
	if (!$revs) {
		print "$progname: $file has never been checked in--skipping\n";
		next;
	}
	elsif ($revs == 1) {
		print "$progname: last revision for $file is $baserev.\n";
		print SNAPSHOT "$file\t$baserev\n";
	}
	else {
		($lastrev) = ($rlog =~ /revision $revbranch\.(\d+)/);
		print "$progname: last revision for $file is $revbranch.$lastrev.\n";
		print SNAPSHOT "$file\t$revbranch.$lastrev\n";
	}
}

close SNAPSHOT;

sub usage {
	print STDERR <<EOM;
Usage: $progname [-ahV] [-o snapshot] [filelist]
  -a : all the files in MANIFEST.new
  -h : print this message and exit
  -o : specify snapshot file output (default $SNAPSHOT)
  -V : print version number and exit
EOM
	exit 1;
}

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";
}

sub rcscomment {
	local($file) = @_;
	local($comment) = '';
	open(FILE,$file);
	while (<FILE>) {
		if (/^(.*)\$Log[:\$]/) {	# They know better than us (hopefully)
			$comment = $1;
			last;
		}
	}
	close FILE;
	unless ($comment) {
		if ($file =~ /\.SH$|[Mm]akefile/) {	# Makefile template
			$comment = '# ';
		} elsif ($file =~ /\.U$/) {			# Metaconfig unit
			$comment = '?RCS: ';
		} elsif ($file =~ /\.man$/) {		# Manual page
			$comment = "''' ";
		} elsif ($file =~ /\.\d\w?$/) {		# Manual page
			$comment = "''' ";
		} elsif ($file =~ /\.[chyl]$/) {	# C source
			$comment = " * ";
		} elsif ($file =~ /\.e$/) {			# Eiffel source
			$comment = "-- ";
		} elsif ($file =~ /\.pl$/) {		# Perl library
			$comment = ";# ";
		}
	}
	$comment;
}

# 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
}