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#!/usr/bin/env perl
#
# This file is Copyright (C) 2005 Thiago Macieira <[email protected]>
#
# 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; version 2 of the License as published
# by the Free Software Foundation.
#
# 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.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
# =====================================================================
# This is a replacement for the old svnlastchange script, with a bit
# more of functionality.
#
# The old one was:
# svn log -r COMMITTED "$*"
# svn diff -r PREV:COMMITTED "$*" || \
# echo >&2 "Error retrieving diff: the file was probably added in the last revision"
#
# =====================================================================
# Turn on warnings the best way depending on the Perl version.
BEGIN {
if ( $] >= 5.006_000)
{ require warnings; import warnings; }
else
{ $^W = 1; }
}
use strict;
#
# Read the parameters
#
my @files;
my $rev;
my $special = 0;
my $onlyrev = 0;
my $onlylog = 0;
while (@ARGV)
{
my $arg = shift @ARGV;
if ($arg eq '-h')
{
&usage;
exit 0;
}
elsif ($arg =~ /^-r(.*)$/)
{
$rev = $1;
if (length($1) == 0)
{
$rev = shift @ARGV;
}
$special = 1 if ($rev =~ /^-/);
}
elsif ($arg eq '-R')
{
$onlyrev = 1;
$special = 1;
$rev = -1 unless $rev;
}
elsif ($arg eq '-l')
{
$onlylog = 1;
}
else
{
push(@files, $arg);
}
}
@files = ('.') unless @files;
if (!$special)
{
my $prev;
if ($rev)
{
$prev = $rev - 1;
}
else
{
$rev = 'COMMITTED';
$prev = 'PREV';
}
system('svn', 'log', '-r', $rev, @files);
system('svn', 'diff', '-r', "$prev:$rev", @files) unless $onlylog;
exit $?;
}
#
# Special operation
# Retrieve the full log in order to find the right version
#
foreach my $file (@files)
{
my $pid = open(LOG, '-|');
die "svnlastchange: cannot fork: $!\n" unless (defined $pid);
unless ($pid)
{
open(STDERR, ">&STDOUT")
or die "svnlastchange: cannot dup STDOUT: $!\n";
exec('svn', 'log', $file)
or die "svnlastchange: cannot exec svn: $!\n";
}
my $is_header = 0;
while (<LOG>)
{
s/[\r\n]+$//;
if ($is_header && /^r(\d+) \| /)
{
$rev = $rev + 1;
if ($rev == 0)
{
if ($onlyrev)
{
print "$1\n";
}
else
{
system('svn', 'log', '-r', $1, $file);
system('svn', 'diff', '-r', ($1 - 1) . ":$1", $file)
unless $onlylog;
}
last;
}
}
if ($_ eq '------------------------------------------------------------------------')
{
$is_header = 1;
}
else
{
$is_header = 0;
}
}
close(LOG);
exit $? if $?;
}
sub usage
{
print "svnlastchange [-hlR] [-r rev] [filename...]\n";
print "\n";
print "Where:\n";
print " -h shows this help screen\n";
print " -l shows the commit log only\n";
print " -R prints the revision number only (to be used with -r)\n";
print " -r rev shows the commit log for revision 'rev'\n";
print " if rev is negative, the 'rev'nth revision before the current\n";
print " one is shown\n";
print "\n";
print "Examples:\n";
print " svnlastchange . shows the last change to the current directory\n";
print " svnlastchange -r -2 shows the change before the last\n";
print " svnlastchange -R -r -1 shows the last change's revision\n";
exit 0;
}
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