1 files changed, 131 insertions, 0 deletions
diff --git a/contrib/fast-import/import-tars.perl b/contrib/fast-import/import-tars.perl
new file mode 100755
index 0000000000..23aeb257b9
--- /dev/null
+++ b/contrib/fast-import/import-tars.perl
@@ -0,0 +1,131 @@
+#!/usr/bin/perl
+
+## tar archive frontend for git-fast-import
+##
+## For example:
+##
+##  mkdir project; cd project; git init
+##  perl import-tars.perl *.tar.bz2
+##  git whatchanged import-tars
+##
+
+use strict;
+die "usage: import-tars *.tar.{gz,bz2,Z}\n" unless @ARGV;
+
+my $branch_name = 'import-tars';
+my $branch_ref = "refs/heads/$branch_name";
+my $committer_name = 'T Ar Creator';
+my $committer_email = 'tar@example.com';
+
+open(FI, '|-', 'git', 'fast-import', '--quiet')
+	or die "Unable to start git fast-import: $!\n";
+foreach my $tar_file (@ARGV)
+{
+	$tar_file =~ m,([^/]+)$,;
+	my $tar_name = $1;
+
+	if ($tar_name =~ s/\.(tar\.gz|tgz)$//) {
+		open(I, '-|', 'gunzip', '-c', $tar_file)
+			or die "Unable to gunzip -c $tar_file: $!\n";
+	} elsif ($tar_name =~ s/\.(tar\.bz2|tbz2)$//) {
+		open(I, '-|', 'bunzip2', '-c', $tar_file)
+			or die "Unable to bunzip2 -c $tar_file: $!\n";
+	} elsif ($tar_name =~ s/\.tar\.Z$//) {
+		open(I, '-|', 'uncompress', '-c', $tar_file)
+			or die "Unable to uncompress -c $tar_file: $!\n";
+	} elsif ($tar_name =~ s/\.tar$//) {
+		open(I, $tar_file) or die "Unable to open $tar_file: $!\n";
+	} else {
+		die "Unrecognized compression format: $tar_file\n";
+	}
+
+	my $commit_time = 0;
+	my $next_mark = 1;
+	my $have_top_dir = 1;
+	my ($top_dir, %files);
+
+	while (read(I, $_, 512) == 512) {
+		my ($name, $mode, $uid, $gid, $size, $mtime,
+			$chksum, $typeflag, $linkname, $magic,
+			$version, $uname, $gname, $devmajor, $devminor,
+			$prefix) = unpack 'Z100 Z8 Z8 Z8 Z12 Z12
+			Z8 Z1 Z100 Z6
+			Z2 Z32 Z32 Z8 Z8 Z*', $_;
+		last unless length($name);
+		if ($name eq '././@LongLink') {
+			# GNU tar extension
+			if (read(I, $_, 512) != 512) {
+				die ('Short archive');
+			}
+			$name = unpack 'Z257', $_;
+			next unless $name;
+
+			my $dummy;
+			if (read(I, $_, 512) != 512) {
+				die ('Short archive');
+			}
+			($dummy, $mode, $uid, $gid, $size, $mtime,
+			$chksum, $typeflag, $linkname, $magic,
+			$version, $uname, $gname, $devmajor, $devminor,
+			$prefix) = unpack 'Z100 Z8 Z8 Z8 Z12 Z12
+			Z8 Z1 Z100 Z6
+			Z2 Z32 Z32 Z8 Z8 Z*', $_;
+		}
+		next if $name =~ m{/\z};
+		$mode = oct $mode;
+		$size = oct $size;
+		$mtime = oct $mtime;
+		next if $typeflag == 5; # directory
+
+		print FI "blob\n", "mark :$next_mark\n", "data $size\n";
+		while ($size > 0 && read(I, $_, 512) == 512) {
+			print FI substr($_, 0, $size);
+			$size -= 512;
+		}
+		print FI "\n";
+
+		my $path;
+		if ($prefix) {
+			$path = "$prefix/$name";
+		} else {
+			$path = "$name";
+		}
+		$files{$path} = [$next_mark++, $mode];
+
+		$commit_time = $mtime if $mtime > $commit_time;
+		$path =~ m,^([^/]+)/,;
+		$top_dir = $1 unless $top_dir;
+		$have_top_dir = 0 if $top_dir ne $1;
+	}
+
+	print FI <<EOF;
+commit $branch_ref
+committer $committer_name <$committer_email> $commit_time +0000
+data <<END_OF_COMMIT_MESSAGE
+Imported from $tar_file.
+END_OF_COMMIT_MESSAGE
+
+deleteall
+EOF
+
+	foreach my $path (keys %files)
+	{
+		my ($mark, $mode) = @{$files{$path}};
+		$path =~ s,^([^/]+)/,, if $have_top_dir;
+		printf FI "M %o :%i %s\n", $mode & 0111 ? 0755 : 0644, $mark, $path;
+	}
+	print FI "\n";
+
+	print FI <<EOF;
+tag $tar_name
+from $branch_ref
+tagger $committer_name <$committer_email> $commit_time +0000
+data <<END_OF_TAG_MESSAGE
+Package $tar_name
+END_OF_TAG_MESSAGE
+
+EOF
+
+	close I;
+}
+close FI;