#!perl -w
 
# Copyright (C) 1997 Capella Computers Ltd.
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
# 
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
# 
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 
# :FILE:
# View difference for a file for a job.
 
use strict;
use English;
use P4;
 
# Takes (optional) job id and (required) file name.
sub usage {
    P4::crash("Usage: p4rdiff [<job>] [<diff-flags> ...] [<file-name>");
}
 
# Parse command line.
my $job;
if ($#ARGV < 0
 || $ARGV[0] eq '-h') {
    usage();
} elsif ($ARGV[0] =~ /^\d+$/) {
    $job = shift(@ARGV);
} else {
    $job = P4::current_job();
}
# Extract flags for 'diff'
my @diff_flags;
while ($#ARGV >= 0 && $ARGV[0] =~ /^-/) {
    my $arg = splice(@ARGV, 0, 1);
    push(@diff_flags, $arg);
}
# The remainder should be a single file name.
if ($#ARGV != 0) {
    usage();
}
my $file = shift(@ARGV);
 
# Verify quick pre-conditions.
P4::verify_get_files("//depot/baseline/$file");
my $diff = $ENV{DIFF};
defined($diff)
    || die("DIFF environment variable is not set.\n");
 
# No need to lock since this is a harmless read-only operation.
 
# Obtain the job record.
my %record = P4::job_record($job);
 
# Verify pre-conditions.
P4::verify_job_status($job, \%record, 'review', 'pass', 'fail', 'integ');
 
# Make sure we have the job's version of the file.
my $user = $record{user};
my $retry = $record{retry};
P4::verify_get_files("//depot/$user/$job-$retry/$file");
 
# Call the diff program.
my $job_file = P4::view_root() . "/$user/$job-$retry/$file";
my $base_file = P4::view_root() . "/baseline/$file";
P4::call_sys($diff, $diff, @diff_flags, $job_file, $base_file);
 
# Be nice.
1;