Andrew's git - gitweb.git/blob - 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
  12use strict;
  13die "usage: import-tars *.tar.{gz,bz2,Z}\n" unless @ARGV;
  14
  15my $branch_name = 'import-tars';
  16my $branch_ref = "refs/heads/$branch_name";
  17my $committer_name = 'T Ar Creator';
  18my $committer_email = 'tar@example.com';
  19
  20open(FI, '|-', 'git', 'fast-import', '--quiet')
  21        or die "Unable to start git fast-import: $!\n";
  22foreach 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;
  74commit $branch_ref
  75committer $committer_name <$committer_email> $commit_time +0000
  76data <<END_OF_COMMIT_MESSAGE
  77Imported from $tar_file.
  78END_OF_COMMIT_MESSAGE
  79
  80deleteall
  81EOF
  82
  83        foreach my $path (keys %files)
  84        {
  85                my ($mark, $mode) = @{$files{$path}};
  86                $path =~ s,^([^/]+)/,, if $have_top_dir;
  87                printf FI "M %o :%i %s\n", $mode & 0111 ? 0755 : 0644, $mark, $path;
  88        }
  89        print FI "\n";
  90
  91        print FI <<EOF;
  92tag $tar_name
  93from $branch_ref
  94tagger $committer_name <$committer_email> $commit_time +0000
  95data <<END_OF_TAG_MESSAGE
  96Package $tar_name
  97END_OF_TAG_MESSAGE
  98
  99EOF
 100
 101        close I;
 102}
 103close FI;