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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 14:47:53 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 14:47:53 +0000
commitc8bae7493d2f2910b57f13ded012e86bdcfb0532 (patch)
tree24e09d9f84dec336720cf393e156089ca2835791 /contrib/fast-import/import-tars.perl
parentInitial commit. (diff)
downloadgit-c8bae7493d2f2910b57f13ded012e86bdcfb0532.tar.xz
git-c8bae7493d2f2910b57f13ded012e86bdcfb0532.zip
Adding upstream version 1:2.39.2.upstream/1%2.39.2upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'contrib/fast-import/import-tars.perl')
-rwxr-xr-xcontrib/fast-import/import-tars.perl227
1 files changed, 227 insertions, 0 deletions
diff --git a/contrib/fast-import/import-tars.perl b/contrib/fast-import/import-tars.perl
new file mode 100755
index 0000000..d50ce26
--- /dev/null
+++ b/contrib/fast-import/import-tars.perl
@@ -0,0 +1,227 @@
+#!/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);
+
+ my $next_path = '';
+
+ 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*', $_;
+
+ unless ($next_path eq '') {
+ # Recover name from previous extended header
+ $name = $next_path;
+ $next_path = '';
+ }
+
+ last unless length($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*', $_;
+ }
+ $mode = oct $mode;
+ $size = oct $size;
+ $mtime = oct $mtime;
+ next if $typeflag == 5; # directory
+
+ if ($typeflag eq 'x') { # extended header
+ # If extended header, check for path
+ my $pax_header = '';
+ while ($size > 0 && read(I, $_, 512) == 512) {
+ $pax_header = $pax_header . substr($_, 0, $size);
+ $size -= 512;
+ }
+
+ my @lines = split /\n/, $pax_header;
+ foreach my $line (@lines) {
+ my ($len, $entry) = split / /, $line;
+ my ($key, $value) = split /=/, $entry;
+ if ($key eq 'path') {
+ $next_path = $value;
+ }
+ }
+ next;
+ } elsif ($name =~ m{/\z}) { # directory
+ next;
+ } elsif ($typeflag != 1) { # handle hard links later
+ print FI "blob\n", "mark :$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);
+ $size -= 512;
+ }
+ }
+ print FI "\n";
+ }
+
+ next if ($typeflag eq 'g'); # ignore global header
+
+ my $path;
+ if ($prefix) {
+ $path = "$prefix/$name";
+ } else {
+ $path = "$name";
+ }
+
+ if ($typeflag == 1) { # hard link
+ $linkname = "$prefix/$linkname" if $prefix;
+ $files{$path} = [ $files{$linkname}->[0], $mode ];
+ } else {
+ $files{$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;