contrib/fast-import/import-tars.perl

   1 #!/usr/bin/perl
   2
   3 ## tar archive frontend for git-fast-import
   4 ##
   5 ## For example:
   6 ##
   7 ##  mkdir project; cd project; git init
   8 ##  perl import-tars.perl *.tar.bz2
   9 ##  git whatchanged import-tars
  10 ##
  11
  12 use strict;
  13 die "usage: import-tars *.tar.{gz,bz2,Z}\n" unless @ARGV;
  14
  15 my $branch_name = 'import-tars';
  16 my $branch_ref = "refs/heads/$branch_name";
  17 my $committer_name = 'T Ar Creator';
  18 my $committer_email = 'tar@example.com';
  19
  20 open(FI, '|-', 'git', 'fast-import', '--quiet')
  21         or die "Unable to start git fast-import: $!\n";
  22 foreach my $tar_file (@ARGV)
  23 {
  24         $tar_file =~ m,([^/]+)$,;
  25         my $tar_name = $1;
  26
  27         if ($tar_name =~ s/\.(tar\.gz|tgz)$//) {
  28                 open(I, '-|', 'gzcat', $tar_file) or die "Unable to gzcat $tar_file: $!\n";
  29         } elsif ($tar_name =~ s/\.(tar\.bz2|tbz2)$//) {
  30                 open(I, '-|', 'bzcat', $tar_file) or die "Unable to bzcat $tar_file: $!\n";
  31         } elsif ($tar_name =~ s/\.tar\.Z$//) {
  32                 open(I, '-|', 'zcat', $tar_file) or die "Unable to zcat $tar_file: $!\n";
  33         } elsif ($tar_name =~ s/\.tar$//) {
  34                 open(I, $tar_file) or die "Unable to open $tar_file: $!\n";
  35         } else {
  36                 die "Unrecognized compression format: $tar_file\n";
  37         }
  38
  39         my $commit_time = 0;
  40         my $next_mark = 1;
  41         my $have_top_dir = 1;
  42         my ($top_dir, %files);
  43
  44         while (read(I, $_, 512) == 512) {
  45                 my ($name, $mode, $uid, $gid, $size, $mtime,
  46                         $chksum, $typeflag, $linkname, $magic,
  47                         $version, $uname, $gname, $devmajor, $devminor,
  48                         $prefix) = unpack 'Z100 Z8 Z8 Z8 Z12 Z12
  49                         Z8 Z1 Z100 Z6
  50                         Z2 Z32 Z32 Z8 Z8 Z*', $_;
  51                 last unless $name;
  52                 $mode = oct $mode;
  53                 $size = oct $size;
  54                 $mtime = oct $mtime;
  55                 next if $mode & 0040000;
  56
  57                 print FI "blob\n", "mark :$next_mark\n", "data $size\n";
  58                 while ($size > 0 && read(I, $_, 512) == 512) {
  59                         print FI substr($_, 0, $size);
  60                         $size -= 512;
  61                 }
  62                 print FI "\n";
  63
  64                 my $path = "$prefix$name";
  65                 $files{$path} = [$next_mark++, $mode];
  66
  67                 $commit_time = $mtime if $mtime > $commit_time;
  68                 $path =~ m,^([^/]+)/,;
  69                 $top_dir = $1 unless $top_dir;
  70                 $have_top_dir = 0 if $top_dir ne $1;
  71         }
  72
  73         print FI <<EOF;
  74 commit $branch_ref
  75 committer $committer_name <$committer_email> $commit_time +0000
  76 data <<END_OF_COMMIT_MESSAGE
  77 Imported from $tar_file.
  78 END_OF_COMMIT_MESSAGE
  79
  80 deleteall
  81 EOF
  82
  83         foreach my $path (keys %files)
  84         {
  85                 my ($mark, $mode) = @{$files{$path}};
  86                 my $git_mode = 0644;
  87                 $git_mode |= 0700 if $mode & 0111;
  88                 $path =~ s,^([^/]+)/,, if $have_top_dir;
  89                 printf FI "M %o :%i %s\n", $git_mode, $mark, $path;
  90         }
  91         print FI "\n";
  92
  93         print FI <<EOF;
  94 tag $tar_name
  95 from $branch_ref
  96 tagger $committer_name <$committer_email> $commit_time +0000
  97 data <<END_OF_TAG_MESSAGE
  98 Package $tar_name
  99 END_OF_TAG_MESSAGE
 100
 101 EOF
 102
 103         close I;
 104 }
 105 close FI;