1 files changed, 250 insertions, 0 deletions
diff --git a/git-mv.perl b/git-mv.perl
new file mode 100755
index 0000000000..75aa8feeb6
--- /dev/null
+++ b/git-mv.perl
@@ -0,0 +1,250 @@
+#!/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>
+$0 [-f] [-n] [-k] <source> ... <destination directory>
+EOT
+	exit(1);
+}
+
+our ($opt_n, $opt_f, $opt_h, $opt_k, $opt_v);
+getopts("hnfkv") || usage;
+usage() if $opt_h;
+@ARGV >= 1 or usage;
+
+my $GIT_DIR = `git rev-parse --git-dir`;
+exit 1 if $?; # rev-parse would have given "not a git dir" message.
+chomp($GIT_DIR);
+
+my (@srcArgs, @dstArgs, @srcs, @dsts);
+my ($src, $dst, $base, $dstDir);
+
+# remove any trailing slash in arguments
+for (@ARGV) { s/\/*$//; }
+
+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: need at least two arguments\n";
+	exit(1);
+    }
+    if ($argCount > 2) {
+	print "Error: moving to directory '"
+	    . $ARGV[$argCount-1]
+	    . "' not possible; not existing\n";
+	exit(1);
+    }
+    @srcArgs = ($ARGV[0]);
+    @dstArgs = ($ARGV[1]);
+    $dstDir = "";
+}
+
+my $subdir_prefix = `git rev-parse --show-prefix`;
+chomp($subdir_prefix);
+
+# run in git base directory, so that git-ls-files lists all revisioned files
+chdir "$GIT_DIR/..";
+
+# normalize paths, needed to compare against versioned files and update-index
+# also, this is nicer to end-users by doing ".//a/./b/.//./c" ==> "a/b/c"
+for (@srcArgs, @dstArgs) {
+    # prepend git prefix as we run from base directory
+    $_ = $subdir_prefix.$_;
+    s|^\./||;
+    s|/\./|/| while (m|/\./|);
+    s|//+|/|g;
+    # Also "a/b/../c" ==> "a/c"
+    1 while (s,(^|/)[^/]+/\.\./,$1,);
+}
+
+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);
+}