Merge branch 'sr/gfi-options' into next
[git] / 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 ## Use --metainfo to specify the extension for a meta data file, where
12 ## import-tars can read the commit message and optionally author and
13 ## committer information.
14 ##
15 ##  echo 'This is the commit message' > myfile.tar.bz2.msg
16 ##  perl import-tars.perl --metainfo=msg myfile.tar.bz2
17
18 use strict;
19 use Getopt::Long;
20
21 my $metaext = '';
22
23 die "usage: import-tars [--metainfo=extension] *.tar.{gz,bz2,Z}\n"
24         unless GetOptions('metainfo=s' => \$metaext) && @ARGV;
25
26 my $branch_name = 'import-tars';
27 my $branch_ref = "refs/heads/$branch_name";
28 my $author_name = $ENV{'GIT_AUTHOR_NAME'} || 'T Ar Creator';
29 my $author_email = $ENV{'GIT_AUTHOR_EMAIL'} || 'tar@example.com';
30 my $committer_name = $ENV{'GIT_COMMITTER_NAME'} || `git config --get user.name`;
31 my $committer_email = $ENV{'GIT_COMMITTER_EMAIL'} || `git config --get user.email`;
32
33 chomp($committer_name, $committer_email);
34
35 open(FI, '|-', 'git', 'fast-import', '--quiet')
36         or die "Unable to start git fast-import: $!\n";
37 foreach my $tar_file (@ARGV)
38 {
39         my $commit_time = time;
40         $tar_file =~ m,([^/]+)$,;
41         my $tar_name = $1;
42
43         if ($tar_name =~ s/\.(tar\.gz|tgz)$//) {
44                 open(I, '-|', 'gunzip', '-c', $tar_file)
45                         or die "Unable to gunzip -c $tar_file: $!\n";
46         } elsif ($tar_name =~ s/\.(tar\.bz2|tbz2)$//) {
47                 open(I, '-|', 'bunzip2', '-c', $tar_file)
48                         or die "Unable to bunzip2 -c $tar_file: $!\n";
49         } elsif ($tar_name =~ s/\.tar\.Z$//) {
50                 open(I, '-|', 'uncompress', '-c', $tar_file)
51                         or die "Unable to uncompress -c $tar_file: $!\n";
52         } elsif ($tar_name =~ s/\.tar$//) {
53                 open(I, $tar_file) or die "Unable to open $tar_file: $!\n";
54         } else {
55                 die "Unrecognized compression format: $tar_file\n";
56         }
57
58         my $author_time = 0;
59         my $next_mark = 1;
60         my $have_top_dir = 1;
61         my ($top_dir, %files);
62
63         while (read(I, $_, 512) == 512) {
64                 my ($name, $mode, $uid, $gid, $size, $mtime,
65                         $chksum, $typeflag, $linkname, $magic,
66                         $version, $uname, $gname, $devmajor, $devminor,
67                         $prefix) = unpack 'Z100 Z8 Z8 Z8 Z12 Z12
68                         Z8 Z1 Z100 Z6
69                         Z2 Z32 Z32 Z8 Z8 Z*', $_;
70                 last unless length($name);
71                 if ($name eq '././@LongLink') {
72                         # GNU tar extension
73                         if (read(I, $_, 512) != 512) {
74                                 die ('Short archive');
75                         }
76                         $name = unpack 'Z257', $_;
77                         next unless $name;
78
79                         my $dummy;
80                         if (read(I, $_, 512) != 512) {
81                                 die ('Short archive');
82                         }
83                         ($dummy, $mode, $uid, $gid, $size, $mtime,
84                         $chksum, $typeflag, $linkname, $magic,
85                         $version, $uname, $gname, $devmajor, $devminor,
86                         $prefix) = unpack 'Z100 Z8 Z8 Z8 Z12 Z12
87                         Z8 Z1 Z100 Z6
88                         Z2 Z32 Z32 Z8 Z8 Z*', $_;
89                 }
90                 next if $name =~ m{/\z};
91                 $mode = oct $mode;
92                 $size = oct $size;
93                 $mtime = oct $mtime;
94                 next if $typeflag == 5; # directory
95
96                 print FI "blob\n", "mark :$next_mark\n";
97                 if ($typeflag == 2) { # symbolic link
98                         print FI "data ", length($linkname), "\n", $linkname;
99                         $mode = 0120000;
100                 } else {
101                         print FI "data $size\n";
102                         while ($size > 0 && read(I, $_, 512) == 512) {
103                                 print FI substr($_, 0, $size);
104                                 $size -= 512;
105                         }
106                 }
107                 print FI "\n";
108
109                 my $path;
110                 if ($prefix) {
111                         $path = "$prefix/$name";
112                 } else {
113                         $path = "$name";
114                 }
115                 $files{$path} = [$next_mark++, $mode];
116
117                 $author_time = $mtime if $mtime > $author_time;
118                 $path =~ m,^([^/]+)/,;
119                 $top_dir = $1 unless $top_dir;
120                 $have_top_dir = 0 if $top_dir ne $1;
121         }
122
123         my $commit_msg = "Imported from $tar_file.";
124         my $this_committer_name = $committer_name;
125         my $this_committer_email = $committer_email;
126         my $this_author_name = $author_name;
127         my $this_author_email = $author_email;
128         if ($metaext ne '') {
129                 # Optionally read a commit message from <filename.tar>.msg
130                 # Add a line on the form "Committer: name <e-mail>" to override
131                 # the committer and "Author: name <e-mail>" to override the
132                 # author for this tar ball.
133                 if (open MSG, '<', "${tar_file}.${metaext}") {
134                         my $header_done = 0;
135                         $commit_msg = '';
136                         while (<MSG>) {
137                                 if (!$header_done && /^Committer:\s+([^<>]*)\s+<(.*)>\s*$/i) {
138                                         $this_committer_name = $1;
139                                         $this_committer_email = $2;
140                                 } elsif (!$header_done && /^Author:\s+([^<>]*)\s+<(.*)>\s*$/i) {
141                                         $this_author_name = $1;
142                                         $this_author_email = $2;
143                                 } elsif (!$header_done && /^$/ { # empty line ends header.
144                                         $header_done = 1;
145                                 } else {
146                                         $commit_msg .= $_;
147                                         $header_done = 1;
148                                 }
149                         }
150                         close MSG;
151                 }
152         }
153
154         print FI <<EOF;
155 commit $branch_ref
156 author $this_author_name <$this_author_email> $author_time +0000
157 committer $this_committer_name <$this_committer_email> $commit_time +0000
158 data <<END_OF_COMMIT_MESSAGE
159 $commit_msg
160 END_OF_COMMIT_MESSAGE
161
162 deleteall
163 EOF
164
165         foreach my $path (keys %files)
166         {
167                 my ($mark, $mode) = @{$files{$path}};
168                 $path =~ s,^([^/]+)/,, if $have_top_dir;
169                 $mode = $mode & 0111 ? 0755 : 0644 unless $mode == 0120000;
170                 printf FI "M %o :%i %s\n", $mode, $mark, $path;
171         }
172         print FI "\n";
173
174         print FI <<EOF;
175 tag $tar_name
176 from $branch_ref
177 tagger $author_name <$author_email> $author_time +0000
178 data <<END_OF_TAG_MESSAGE
179 Package $tar_name
180 END_OF_TAG_MESSAGE
181
182 EOF
183
184         close I;
185 }
186 close FI;