1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
|
#! /usr/bin/perl
# Copyright (C) 2001 Free Software Foundation, Inc.
#
# This file is part of GNU Emacs.
#
# GNU Emacs 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, or (at your option)
# any later version.
#
# GNU Emacs 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 GNU Emacs; see the file COPYING. If not, write to the
# Free Software Foundation, Inc., 59 Temple Place - Suite 330,
# Boston, MA 02111-1307, USA.
use File::Basename;
if (@ARGV < 3)
{
print <<USAGE;
revdiff FILE OLD NEW
Get a diff of FILE between revisions OLD and NEW. Store the
diff in a file named FILE-OLD-NEW.diff.
If OLD is `-' use FILE's current revision for OLD. If OLD is
`-<number>', use the Nth revision before the current one for OLD.
If NEW is +<number> or -<number>, build diffs between revisions OLD
and OLD +/- <number>.
Examples:
revdiff FILE - -1 get the latest change of FILE
revdiff FILE -1 +1 also gets the latest change of FILE
revdiff FILE 1.500 +2 get diffs 1.500-1.501 and 1.501-1.502.
USAGE
exit 1;
}
$file = shift @ARGV;
$old = shift @ARGV;
sub diffit
{
my ($old, $new) = @_;
print "cvs diff -r$old -r$new $file >$file-$old-$new.diff\n";
system "cvs diff -r$old -r$new $file >$file-$old-$new.diff";
}
sub current_revision ($)
{
my ($file) = @_;
my $dir = dirname ($file);
my $base = basename ($file);
my $entries = "$dir/CVS/Entries";
die "Can't find $entries" unless -f $entries;
open (IN, "<$entries") or die "Cannot open $entries";
my $rev;
while ($line = <IN>)
{
if ($line =~ m,/$base/([^/]+),)
{
$rev = $1;
break;
}
}
die "Cannot determine current revision of $file" unless $rev;
close (IN);
return $rev;
}
if ($old eq "-")
{
$old = current_revision ($file);
}
elsif ($old =~ /^-(\d+)$/)
{
my $offset = $1;
$old = current_revision ($file);
die "Internal error" unless $old =~ /(.*)\.(\d+)$/;
my $minor = $2 - $offset;
$old = sprintf ("%d.%d", $1, $minor);
}
while (@ARGV)
{
my $new = shift @ARGV;
if ($new =~ /^[+]\d+$/)
{
my $n = $new;
for ($i = 0; $i < $n; ++$i)
{
unless ($old =~ /(.*)\.(\d+)$/)
{
die "Internal error";
}
my $j = $2 + 1;
$new = "$1.$j";
diffit ($old, $new);
$old = $new;
}
}
elsif ($new =~ /^[-]\d+$/)
{
my $n = - $new;
for ($i = 0; $i < $n; ++$i)
{
unless ($old =~ /(.*)\.(\d+)$/)
{
die "Internal error";
}
my $j = $2 - 1;
$new = "$1.$j";
diffit ($new, $old);
$old = $new;
}
}
else
{
diffit ($old, $new);
$old = $new;
}
}
# Local Variables:
# mode: cperl
# End:
|
