summaryrefslogtreecommitdiff
path: root/git-mv.perl
blob: 28bced95954e40273fc783977d857e5c74d44b51 (plain)
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
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
#!/usr/bin/perl
#
# Copyright 2005, Ryan Anderson <ryan@michonline.com>
#                 Josef Weidendorfer <Josef.Weidendorfer@gmx.de>
#
# This file is licensed under the GPL v2, or a later version
# at the discretion of Linus Torvalds.
 
 
use warnings;
use strict;
use Getopt::Std;
 
sub usage() {
	print <<EOT;
$0 [-f] [-n] <source> <dest>
$0 [-f] [-k] [-n] <source> ... <dest directory>
 
In the first form, source must exist and be either a file,
symlink or directory, dest must not exist. It renames source to dest.
In the second form, the last argument has to be an existing
directory; the given sources will be moved into this directory.
 
Updates the git cache to reflect the change.
Use "git commit" to make the change permanently.
 
Options:
  -f   Force renaming/moving, even if target exists
  -k   Continue on error by skipping
       not-existing or not revision-controlled source
  -n   Do nothing; show what would happen
EOT
	exit(1);
}
 
# Sanity checks:
my $GIT_DIR = $ENV{'GIT_DIR'} || ".git";
 
unless ( -d $GIT_DIR && -d $GIT_DIR . "/objects" && 
	-d $GIT_DIR . "/objects/" && -d $GIT_DIR . "/refs") {
    print "Git repository not found.";
    usage();
}
 
 
our ($opt_n, $opt_f, $opt_h, $opt_k, $opt_v);
getopts("hnfkv") || usage;
usage() if $opt_h;
@ARGV >= 1 or usage;
 
my (@srcArgs, @dstArgs, @srcs, @dsts);
my ($src, $dst, $base, $dstDir);
 
my $argCount = scalar @ARGV;
if (-d $ARGV[$argCount-1]) {
	$dstDir = $ARGV[$argCount-1];
	@srcArgs = @ARGV[0..$argCount-2];
 
	foreach $src (@srcArgs) {
		$base = $src;
		$base =~ s/^.*\///;
		$dst = "$dstDir/". $base;
		push @dstArgs, $dst;
	}
}
else {
    if ($argCount != 2) {
	print "Error: moving to directory '"
	    . $ARGV[$argCount-1]
	    . "' not possible; not exisiting\n";
	usage;
    }
    @srcArgs = ($ARGV[0]);
    @dstArgs = ($ARGV[1]);
    $dstDir = "";
}
 
my (@allfiles,@srcfiles,@dstfiles);
my $safesrc;
my %overwritten;
 
$/ = "\0";
open(F,"-|","git-ls-files","-z")
        or die "Failed to open pipe from git-ls-files: " . $!;
 
@allfiles = map { chomp; $_; } <F>;
close(F);
 
 
my ($i, $bad);
while(scalar @srcArgs > 0) {
    $src = shift @srcArgs;
    $dst = shift @dstArgs;
    $bad = "";
 
    if ($opt_v) {
	print "Checking rename of '$src' to '$dst'\n";
    }
 
    unless (-f $src || -l $src || -d $src) {
	$bad = "bad source '$src'";
    }
 
    $overwritten{$dst} = 0;
    if (($bad eq "") && -e $dst) {
	$bad = "destination '$dst' already exists";
	if (-f $dst && $opt_f) {
	    print "Warning: $bad; will overwrite!\n";
	    $bad = "";
	    $overwritten{$dst} = 1;
	}
    }
 
    if (($bad eq "") && ($src eq $dstDir)) {
	$bad = "can not move directory '$src' into itself";
    }
 
    if ($bad eq "") {
	$safesrc = quotemeta($src);
	@srcfiles = grep /^$safesrc(\/|$)/, @allfiles;
        if (scalar @srcfiles == 0) {
	    $bad = "'$src' not under version control";
	}
    }
 
    if ($bad ne "") {
	if ($opt_k) {
	    print "Warning: $bad; skipping\n";
	    next;
	}
	print "Error: $bad\n";
	usage();
    }
    push @srcs, $src;
    push @dsts, $dst;
}
 
# Final pass: rename/move
my (@deletedfiles,@addedfiles,@changedfiles);
while(scalar @srcs > 0) {
    $src = shift @srcs;
    $dst = shift @dsts;
 
    if ($opt_n || $opt_v) { print "Renaming $src to $dst\n"; }
    if (!$opt_n) {
	rename($src,$dst)
	    or die "rename failed: $!";
    }
 
    $safesrc = quotemeta($src);
    @srcfiles = grep /^$safesrc(\/|$)/, @allfiles;
    @dstfiles = @srcfiles;
    s/^$safesrc(\/|$)/$dst$1/ for @dstfiles;
 
    push @deletedfiles, @srcfiles;
    if (scalar @srcfiles == 1) {
	if ($overwritten{$dst} ==1) {
	    push @changedfiles, $dst;
	} else {
	    push @addedfiles, $dst;
	}
    }
    else {
	push @addedfiles, @dstfiles;
    }
}
 
if ($opt_n) {
	print "Changed  : ". join(", ", @changedfiles) ."\n";
	print "Adding   : ". join(", ", @addedfiles) ."\n";
	print "Deleting : ". join(", ", @deletedfiles) ."\n";
	exit(1);
}
 
my $rc;
if (scalar @changedfiles >0) {
	$rc = system("git-update-index","--",@changedfiles);
	die "git-update-index failed to update changed files with code $?\n" if $rc;
}
if (scalar @addedfiles >0) {
	$rc = system("git-update-index","--add","--",@addedfiles);
	die "git-update-index failed to add new names with code $?\n" if $rc;
}
$rc = system("git-update-index","--remove","--",@deletedfiles);
die "git-update-index failed to remove old names with code $?\n" if $rc;