#!/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); 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"; 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"; } $files{$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;