aboutsummaryrefslogtreecommitdiff
path: root/git-mv.perl
blob: 2ea852c9185743d5b84523698cbffaaffb238543 (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
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
#!/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> <destination>
$0 [-f] [-n] [-k] <source> ... <destination directory>
EOT
	exit(1);
}

my $GIT_DIR = `git rev-parse --git-dir`;
exit 1 if $?; # rev-parse would have given "not a git dir" message.
chomp($GIT_DIR);

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];
	# remove any trailing slash
	$dstDir =~ s/\/$//;
	@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";
	exit(1);
    }
    @srcArgs = ($ARGV[0]);
    @dstArgs = ($ARGV[1]);
    $dstDir = "";
}

my (@allfiles,@srcfiles,@dstfiles);
my $safesrc;
my (%overwritten, %srcForDst);

$/ = "\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 = "";

    for ($src, $dst) {
	# Be nicer to end-users by doing ".//a/./b/.//./c" ==> "a/b/c"
	s|^\./||;
	s|/\./|/| while (m|/\./|);
	s|//+|/|g;
	# Also "a/b/../c" ==> "a/c"
	1 while (s,(^|/)[^/]+/\.\./,$1,);
    }

    if ($opt_v) {
	print "Checking rename of '$src' to '$dst'\n";
    }

    unless (-f $src || -l $src || -d $src) {
	$bad = "bad source '$src'";
    }

    $safesrc = quotemeta($src);
    @srcfiles = grep /^$safesrc(\/|$)/, @allfiles;

    $overwritten{$dst} = 0;
    if (($bad eq "") && -e $dst) {
	$bad = "destination '$dst' already exists";
	if ($opt_f) {
	    # only files can overwrite each other: check both source and destination
	    if (-f $dst && (scalar @srcfiles == 1)) {
		print "Warning: $bad; will overwrite!\n";
		$bad = "";
		$overwritten{$dst} = 1;
	    }
	    else {
		$bad = "Can not overwrite '$src' with '$dst'";
	    }
	}
    }
    
    if (($bad eq "") && ($dst =~ /^$safesrc\//)) {
	$bad = "can not move directory '$src' into itself";
    }

    if ($bad eq "") {
        if (scalar @srcfiles == 0) {
	    $bad = "'$src' not under version control";
	}
    }

    if ($bad eq "") {
       if (defined $srcForDst{$dst}) {
           $bad = "can not move '$src' to '$dst'; already target of ";
           $bad .= "'".$srcForDst{$dst}."'";
       }
       else {
           $srcForDst{$dst} = $src;
       }
    }

    if ($bad ne "") {
	if ($opt_k) {
	    print "Warning: $bad; skipping\n";
	    next;
	}
	print "Error: $bad\n";
	exit(1);
    }
    push @srcs, $src;
    push @dsts, $dst;
}

# Final pass: rename/move
my (@deletedfiles,@addedfiles,@changedfiles);
$bad = "";
while(scalar @srcs > 0) {
    $src = shift @srcs;
    $dst = shift @dsts;

    if ($opt_n || $opt_v) { print "Renaming $src to $dst\n"; }
    if (!$opt_n) {
	if (!rename($src,$dst)) {
	    $bad = "renaming '$src' failed: $!";
	    if ($opt_k) {
		print "Warning: skipped: $bad\n";
		$bad = "";
		next;
	    }
	    last;
	}
    }

    $safesrc = quotemeta($src);
    @srcfiles = grep /^$safesrc(\/|$)/, @allfiles;
    @dstfiles = @srcfiles;
    s/^$safesrc(\/|$)/$dst$1/ for @dstfiles;

    push @deletedfiles, @srcfiles;
    if (scalar @srcfiles == 1) {
	# $dst can be a directory with 1 file inside
	if ($overwritten{$dst} ==1) {
	    push @changedfiles, $dstfiles[0];

	} else {
	    push @addedfiles, $dstfiles[0];
	}
    }
    else {
	push @addedfiles, @dstfiles;
    }
}

if ($opt_n) {
    if (@changedfiles) {
	print "Changed  : ". join(", ", @changedfiles) ."\n";
    }
    if (@addedfiles) {
	print "Adding   : ". join(", ", @addedfiles) ."\n";
    }
    if (@deletedfiles) {
	print "Deleting : ". join(", ", @deletedfiles) ."\n";
    }
}
else {
    if (@changedfiles) {
	open(H, "| git-update-index -z --stdin")
		or die "git-update-index failed to update changed files with code $!\n";
	foreach my $fileName (@changedfiles) {
		print H "$fileName\0";
	}
	close(H);
    }
    if (@addedfiles) {
	open(H, "| git-update-index --add -z --stdin")
		or die "git-update-index failed to add new names with code $!\n";
	foreach my $fileName (@addedfiles) {
		print H "$fileName\0";
	}
	close(H);
    }
    if (@deletedfiles) {
	open(H, "| git-update-index --remove -z --stdin")
		or die "git-update-index failed to remove old names with code $!\n";
	foreach my $fileName (@deletedfiles) {
		print H "$fileName\0";
	}
	close(H);
    }
}

if ($bad ne "") {
    print "Error: $bad\n";
    exit(1);
}