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authorllornkcor <llornkcor>2003-11-01 05:53:17 (UTC)
committer llornkcor <llornkcor>2003-11-01 05:53:17 (UTC)
commite1a2f2d6fcf26234bd771acfcfa08f9b3fa73657 (patch) (unidiff)
tree1e828bddc55fd369044a7199eca9464fe2282608 /scripts/diffsplit
parent37414f207b147af4cf6778b323a0aa23127901bd (diff)
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everyone should have this
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-rwxr-xr-xscripts/diffsplit148
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1#!/usr/bin/perl -w
2
3# diffsplit - split up unified diffs
4#
5# Copyright (C) 2001-2002 Transmeta Corporation
6#
7# written by Daniel Quinlan <quinlan@transmeta.com>
8#
9# This program is free software; you can redistribute it and/or modify
10# it under the terms of the GNU General Public License as published by
11# the Free Software Foundation; either version 2 of the License, or
12# (at your option) any later version.
13#
14# This program is distributed in the hope that it will be useful,
15# but WITHOUT ANY WARRANTY; without even the implied warranty of
16# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17# GNU General Public License for more details.
18#
19# You should have received a copy of the GNU General Public License
20# along with this program; if not, write to the Free Software
21# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22
23$prog = $0;
24$prog =~ s@.*/@@;
25
26use Getopt::Std;
27use vars qw($opt_d $opt_h $opt_q $opt_t);
28
29if (defined($ENV{DIFFSPLIT})) {
30 unshift(@ARGV, $ENV{DIFFSPLIT});
31}
32
33getopts("b:cdho:p:qs:t");
34
35if ($#ARGV < 0) {
36 push(@ARGV, "-");
37}
38
39if ($opt_h) {
40 usage(0);
41}
42if ($opt_c) {
43 $regexp = '^Index:\s+(.*)';
44}
45else {
46 $regexp = '^diff\s+.*\s+(\S+)';
47}
48
49foreach $file (@ARGV) {
50 if (!open(IN, $file)) {
51 warn("$prog: $file: $!\n");
52 next;
53 }
54 $out = '';
55 $name = 'header';
56 $in_header = 0;
57 while(<IN>) {
58 if (/^@@/) {
59 $in_header = 0;
60 }
61 if ($opt_c) {
62 s/^([-+][-+][-+]) (\S+)/$1 $name/;
63 }
64 if (/$regexp/ ||
65 (! $in_header && /^(\-\-\-) (\S+)/ && ($no_name = 1)))
66 {
67 # save last file
68 $last = $name;
69 &close_file($last);
70
71 $in_header = 1;
72
73 $name = $1;
74
75 if ($no_name) {
76 $no_name = 0;
77 $out .= $_;
78 $_ = <IN>;
79 if (/^\+\+\+ (\S+)/) {
80 $name = $1;
81 }
82 }
83 }
84 $out .= $_;
85 }
86 &close_file($name);
87 close(IN);
88}
89
90sub close_file {
91 my ($name) = @_;
92 my $orig;
93
94 if ($opt_p) {
95 $name =~ s/^$opt_p//;
96 }
97 if ($opt_b) {
98 $name =~ s/^/$opt_b/;
99 }
100 $orig = $name;
101 if ($out ne '') {
102 if ($opt_d) {
103 $name =~ s@/[^/]+$@@;
104 }
105 if ($opt_o) {
106 $name = $opt_o;
107 }
108 if ($opt_s && $name ne "header") {
109 $name .= $opt_s;
110 }
111 $name =~ s@/@_@g;
112 if (-e $name && ! $seen{$name}) {
113 die "$prog: \"$name\" already exists, stopping\n";
114 }
115 if (! $opt_q) {
116 print STDERR "file: $orig -> $name\n";
117 }
118 if (! $opt_t) {
119 open(OUT, ">> $name");
120 print OUT $out;
121 close(OUT);
122 }
123 $seen{$name}++;
124 $out = '';
125 }
126}
127
128sub usage {
129 $status = shift;
130
131 $out = $status ? STDERR : STDOUT;
132 print $out <<EOF;
133usage: $prog [options] [file ...]
134
135Split up unified diffs. If no files are supplied, operates on standard input.
136
137 -b begin add begin to the front of each filename
138 -c input is a CVS diff (splits correctly and fixes diff filenames)
139 -d split by directory name instead of filename
140 -h print this help
141 -o file create a single output file, "-" outputs to stdout (useful with -c)
142 -p prefix strip prefix from the front of each filename (use / characters)
143 -q run quietly
144 -s .suf use suffix .suf on created files (default is no suffix)
145 -t test run (no writes)
146EOF
147 exit($status);
148}