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https://github.com/git/git.git
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6872f606d9
The import-tars script is typically employed to (re)create the past history of a project from stored tars. Although assigning authorship in these cases can be a somewhat arbitrary process, it makes sense to set the author to whoever created the tars in the first place (if it's known), and (s)he can in general be different from the committer (whoever is running the script). Implement this by having separate author and committer data, making them settable from the usual GIT_* environment variables. Acked-by: Shawn O. Pearce <spearce@spearce.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
138 lines
3.5 KiB
Perl
Executable File
138 lines
3.5 KiB
Perl
Executable File
#!/usr/bin/perl
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## tar archive frontend for git-fast-import
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##
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## For example:
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##
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## mkdir project; cd project; git init
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## perl import-tars.perl *.tar.bz2
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## git whatchanged import-tars
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##
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use strict;
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die "usage: import-tars *.tar.{gz,bz2,Z}\n" unless @ARGV;
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my $branch_name = 'import-tars';
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my $branch_ref = "refs/heads/$branch_name";
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my $author_name = $ENV{'GIT_AUTHOR_NAME'} || 'T Ar Creator';
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my $author_email = $ENV{'GIT_AUTHOR_EMAIL'} || 'tar@example.com';
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my $committer_name = $ENV{'GIT_COMMITTER_NAME'} || `git config --get user.name`;
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my $committer_email = $ENV{'GIT_COMMITTER_EMAIL'} || `git config --get user.email`;
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chomp($committer_name, $committer_email);
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open(FI, '|-', 'git', 'fast-import', '--quiet')
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or die "Unable to start git fast-import: $!\n";
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foreach my $tar_file (@ARGV)
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{
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my $commit_time = time;
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$tar_file =~ m,([^/]+)$,;
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my $tar_name = $1;
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if ($tar_name =~ s/\.(tar\.gz|tgz)$//) {
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open(I, '-|', 'gunzip', '-c', $tar_file)
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or die "Unable to gunzip -c $tar_file: $!\n";
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} elsif ($tar_name =~ s/\.(tar\.bz2|tbz2)$//) {
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open(I, '-|', 'bunzip2', '-c', $tar_file)
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or die "Unable to bunzip2 -c $tar_file: $!\n";
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} elsif ($tar_name =~ s/\.tar\.Z$//) {
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open(I, '-|', 'uncompress', '-c', $tar_file)
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or die "Unable to uncompress -c $tar_file: $!\n";
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} elsif ($tar_name =~ s/\.tar$//) {
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open(I, $tar_file) or die "Unable to open $tar_file: $!\n";
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} else {
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die "Unrecognized compression format: $tar_file\n";
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}
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my $author_time = 0;
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my $next_mark = 1;
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my $have_top_dir = 1;
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my ($top_dir, %files);
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while (read(I, $_, 512) == 512) {
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my ($name, $mode, $uid, $gid, $size, $mtime,
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$chksum, $typeflag, $linkname, $magic,
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$version, $uname, $gname, $devmajor, $devminor,
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$prefix) = unpack 'Z100 Z8 Z8 Z8 Z12 Z12
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Z8 Z1 Z100 Z6
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Z2 Z32 Z32 Z8 Z8 Z*', $_;
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last unless length($name);
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if ($name eq '././@LongLink') {
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# GNU tar extension
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if (read(I, $_, 512) != 512) {
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die ('Short archive');
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}
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$name = unpack 'Z257', $_;
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next unless $name;
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my $dummy;
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if (read(I, $_, 512) != 512) {
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die ('Short archive');
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}
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($dummy, $mode, $uid, $gid, $size, $mtime,
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$chksum, $typeflag, $linkname, $magic,
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$version, $uname, $gname, $devmajor, $devminor,
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$prefix) = unpack 'Z100 Z8 Z8 Z8 Z12 Z12
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Z8 Z1 Z100 Z6
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Z2 Z32 Z32 Z8 Z8 Z*', $_;
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}
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next if $name =~ m{/\z};
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$mode = oct $mode;
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$size = oct $size;
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$mtime = oct $mtime;
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next if $typeflag == 5; # directory
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print FI "blob\n", "mark :$next_mark\n", "data $size\n";
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while ($size > 0 && read(I, $_, 512) == 512) {
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print FI substr($_, 0, $size);
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$size -= 512;
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}
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print FI "\n";
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my $path;
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if ($prefix) {
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$path = "$prefix/$name";
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} else {
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$path = "$name";
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}
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$files{$path} = [$next_mark++, $mode];
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$author_time = $mtime if $mtime > $author_time;
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$path =~ m,^([^/]+)/,;
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$top_dir = $1 unless $top_dir;
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$have_top_dir = 0 if $top_dir ne $1;
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}
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print FI <<EOF;
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commit $branch_ref
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author $author_name <$author_email> $author_time +0000
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committer $committer_name <$committer_email> $commit_time +0000
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data <<END_OF_COMMIT_MESSAGE
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Imported from $tar_file.
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END_OF_COMMIT_MESSAGE
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deleteall
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EOF
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foreach my $path (keys %files)
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{
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my ($mark, $mode) = @{$files{$path}};
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$path =~ s,^([^/]+)/,, if $have_top_dir;
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printf FI "M %o :%i %s\n", $mode & 0111 ? 0755 : 0644, $mark, $path;
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}
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print FI "\n";
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print FI <<EOF;
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tag $tar_name
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from $branch_ref
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tagger $author_name <$author_email> $author_time +0000
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data <<END_OF_TAG_MESSAGE
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Package $tar_name
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END_OF_TAG_MESSAGE
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EOF
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close I;
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}
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close FI;
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