merge(third_party/git): Merge squashed git subtree at v2.23.0 r/373

Merge commit '1b593e1ea4d2af0f6444d9a7788d5d99abd6fde5' as 'third_party/git'

1 files changed, 225 insertions, 0 deletions

diff --git a/third_party/git/contrib/fast-import/import-tars.perl b/third_party/git/contrib/fast-import/import-tars.perl
new file mode 100755
index 000000000000..e800d9f5c9cf
--- /dev/null
+++ b/third_party/git/contrib/fast-import/import-tars.perl
@@ -0,0 +1,225 @@
+#!/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 --metainfo to specify the extension for a meta data file, where
+## import-tars can read the commit message and optionally author and
+## committer information.
+##
+##  echo 'This is the commit message' > myfile.tar.bz2.msg
+##  perl import-tars.perl --metainfo=msg myfile.tar.bz2
+
+use strict;
+use Getopt::Long;
+
+my $metaext = '';
+
+die "usage: import-tars [--metainfo=extension] *.tar.{gz,bz2,lzma,xz,Z}\n"
+	unless GetOptions('metainfo=s' => \$metaext) && @ARGV;
+
+my $branch_name = 'import-tars';
+my $branch_ref = "refs/heads/$branch_name";
+my $author_name = $ENV{'GIT_AUTHOR_NAME'} || 'T Ar Creator';
+my $author_email = $ENV{'GIT_AUTHOR_EMAIL'} || 'tar@example.com';
+my $committer_name = $ENV{'GIT_COMMITTER_NAME'} || `git config --get user.name`;
+my $committer_email = $ENV{'GIT_COMMITTER_EMAIL'} || `git config --get user.email`;
+
+chomp($committer_name, $committer_email);
+
+open(FI, '|-', 'git', 'fast-import', '--quiet')
+	or die "Unable to start git fast-import: $!\n";
+foreach my $tar_file (@ARGV)
+{
+	my $commit_time = time;
+	$tar_file =~ m,([^/]+)$,;
+	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\.(lzma|xz)|(tlz|txz))$//) {
+		open(I, '-|', 'xz', '-dc', $tar_file)
+			or die "Unable to xz -dc $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 $author_time = 0;
+	my $next_mark = 1;
+	my $have_top_dir = 1;
+	my ($top_dir, %files);
+
+	my $next_path = '';
+
+	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*', $_;
+
+		unless ($next_path eq '') {
+			# Recover name from previous extended header
+			$name = $next_path;
+			$next_path = '';
+		}
+
+		last unless length($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*', $_;
+		}
+		$mode = oct $mode;
+		$size = oct $size;
+		$mtime = oct $mtime;
+		next if $typeflag == 5; # directory
+
+		if ($typeflag eq 'x') { # extended header
+			# If extended header, check for path
+			my $pax_header = '';
+			while ($size > 0 && read(I, $_, 512) == 512) {
+				$pax_header = $pax_header . substr($_, 0, $size);
+				$size -= 512;
+			}
+
+			my @lines = split /\n/, $pax_header;
+			foreach my $line (@lines) {
+				my ($len, $entry) = split / /, $line;
+				my ($key, $value) = split /=/, $entry;
+				if ($key eq 'path') {
+					$next_path = $value;
+				}
+			}
+			next;
+		} elsif ($name =~ m{/\z}) { # directory
+			next;
+		} elsif ($typeflag != 1) { # handle hard links later
+			print FI "blob\n", "mark :$next_mark\n";
+			if ($typeflag == 2) { # symbolic link
+				print FI "data ", length($linkname), "\n",
+					$linkname;
+				$mode = 0120000;
+			} else {
+				print FI "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";
+		}
+
+		if ($typeflag == 1) { # hard link
+			$linkname = "$prefix/$linkname" if $prefix;
+			$files{$path} = [ $files{$linkname}->[0], $mode ];
+		} else {
+			$files{$path} = [$next_mark++, $mode];
+		}
+
+		$author_time = $mtime if $mtime > $author_time;
+		$path =~ m,^([^/]+)/,;
+		$top_dir = $1 unless $top_dir;
+		$have_top_dir = 0 if $top_dir ne $1;
+	}
+
+	my $commit_msg = "Imported from $tar_file.";
+	my $this_committer_name = $committer_name;
+	my $this_committer_email = $committer_email;
+	my $this_author_name = $author_name;
+	my $this_author_email = $author_email;
+	if ($metaext ne '') {
+		# Optionally read a commit message from <filename.tar>.msg
+		# Add a line on the form "Committer: name <e-mail>" to override
+		# the committer and "Author: name <e-mail>" to override the
+		# author for this tar ball.
+		if (open MSG, '<', "${tar_file}.${metaext}") {
+			my $header_done = 0;
+			$commit_msg = '';
+			while (<MSG>) {
+				if (!$header_done && /^Committer:\s+([^<>]*)\s+<(.*)>\s*$/i) {
+					$this_committer_name = $1;
+					$this_committer_email = $2;
+				} elsif (!$header_done && /^Author:\s+([^<>]*)\s+<(.*)>\s*$/i) {
+					$this_author_name = $1;
+					$this_author_email = $2;
+				} elsif (!$header_done && /^$/) { # empty line ends header.
+					$header_done = 1;
+				} else {
+					$commit_msg .= $_;
+					$header_done = 1;
+				}
+			}
+			close MSG;
+		}
+	}
+
+	print FI <<EOF;
+commit $branch_ref
+author $this_author_name <$this_author_email> $author_time +0000
+committer $this_committer_name <$this_committer_email> $commit_time +0000
+data <<END_OF_COMMIT_MESSAGE
+$commit_msg
+END_OF_COMMIT_MESSAGE
+
+deleteall
+EOF
+
+	foreach my $path (keys %files)
+	{
+		my ($mark, $mode) = @{$files{$path}};
+		$path =~ s,^([^/]+)/,, if $have_top_dir;
+		$mode = $mode & 0111 ? 0755 : 0644 unless $mode == 0120000;
+		printf FI "M %o :%i %s\n", $mode, $mark, $path;
+	}
+	print FI "\n";
+
+	print FI <<EOF;
+tag $tar_name
+from $branch_ref
+tagger $author_name <$author_email> $author_time +0000
+data <<END_OF_TAG_MESSAGE
+Package $tar_name
+END_OF_TAG_MESSAGE
+
+EOF
+
+	close I;
+}
+close FI;