=head1 bak-git
-Simpliest possible backup from remote host (with natcat as
-only depenency) to ad-hoc remote server
+Simple tracking of remote files in central git repository
+with only shell, netcat, rsync and ssh on client
-Install on client with:
+Start server, install on remote-host or upgrade with:
- echo install | nc 127.0.0.1 9001 > bak ; chmod 755 bak
-
-Start server with:
-
- ./server.pl /path/to/backup 127.0.0.1
+ ./bak-git-server.pl /path/to/backup 192.168.42.42
+ [--install remote-host]
+ [--upgrade]
You will want to add following to C<~/.ssh/config>
RemoteForward 9001 localhost:9001
+bak command overview:
+
+ bak add /path
+ bak commit [/path [message]]
+ bak diff [host:][/path]
+ bak status [/path]
+ bak log [/path]
+
+ bak ch[anges]
+ bak revert [host:]/path
+
+ bak - push all changed files to server
+
=cut
use warnings;
use File::Path;
use Getopt::Long;
-my $install = 0;
+my $upgrade = 0;
+my $install;
+
GetOptions(
- 'install!' => \$install,
+ 'upgrade!' => \$upgrade,
+ 'install=s' => \$install,
) || die "$!\n";
my ( $dir, $server_ip ) = @ARGV;
-die "usage: $0 /backup/directory\n" unless $dir;
+die "usage: $0 /backup/directory 127.0.0.1\n" unless $dir;
$server_ip ||= '127.0.0.1';
my $shell_client = <<__SHELL_CLIENT__;
#!/bin/sh
-echo `hostname -s` `pwd` \$* | nc $server_ip 9001
+echo \$USER/\$SUDO_USER `hostname -s` `pwd` \$* | nc $server_ip 9001
__SHELL_CLIENT__
chdir $dir;
system 'git init' unless -e '.git';
-if ( $install ) {
+if ( $upgrade || $install ) {
open(my $fh, '>', '/tmp/bak');
print $fh $shell_client;
close($fh);
+ chmod 0755, '/tmp/bak';
+
+ my @hosts = grep { -d $_ } glob '*';
+ @hosts = ( $install ) if $install;
- foreach my $hostname ( glob '*' ) {
+ foreach my $hostname ( @hosts ) {
warn "install on $hostname\n";
+ system 'ssh-copy-id', "root\@$hostname" if ! -d $hostname;
system "scp /tmp/bak root\@$hostname:/usr/local/bin/";
+ system "ssh root\@$hostname apt-get install -y rsync";
}
}
warn "dir: $dir listen: $server_ip:9001\n"
- , "remote-host> echo install | nc $server_ip 9001 > bak ; chmod 755 bak\n"
, $shell_client
;
-while (my $client = $server->accept()) {
- my ($hostname,$pwd,$command,$path,$message) = split(/\s+/,<$client>,5);
-
- if ( $pwd eq 'install' ) {
- warn "install on $hostname\n";
- print $client $shell_client;
- close($client);
- system 'ssh-copy-id', "root\@$hostname" if ! -d $hostname;
- next;
+sub pull_changes {
+ my $hostname = shift;
+ system "find $hostname -type f | sed 's,$hostname,,' > /tmp/$hostname.list";
+ if ( @_ ) {
+ open(my $files, '>>', "/tmp/$hostname.list");
+ print $files "$_\n" foreach @_;
+ close($files);
}
+ system "rsync -avv --files-from /tmp/$hostname.list root\@$hostname:/ $hostname/"
+}
- $message ||= '';
- $path = "$pwd/$path" unless $path =~ m{^/};
-
- warn "$hostname [$command] $path | $message\n";
+while (my $client = $server->accept()) {
+ my $line = <$client>;
+ chomp($line);
+ warn "<<< $line\n";
+ my ($user,$hostname,$pwd,$command,$rel_path,$message) = split(/\s+/,$line,6);
+
+ my $on_host = '';
+ if ( $rel_path =~ s/^([^:]+):(.+)$/$2/ ) {
+ if ( -e $1 ) {
+ $on_host = $1;
+ } else {
+ print $client "host $1 doesn't exist in backup\n";
+ next;
+ }
+ }
+ my $path = $rel_path =~ m{^/} ? $rel_path : "$pwd/$rel_path";
+ warn "$hostname [$command] $on_host:$path | $message\n";
+ $message ||= "$path [$command]";
+ $message = "$hostname: $message";
my $dir = $path;
$dir =~ s{/[^/]+$}{};
- mkpath "$hostname/$dir" unless -e "$hostname/$dir";
+ my $backup_path = -e "$hostname/$path" ? "$hostname/$path" : $hostname;
+
+ sub git {
+ my $args = join(' ',@_);
+ warn "# git $args\n";
+ my $out = `git $args`;
+ warn "$out\n# [", length($out), " bytes]\n" if defined $out;
+ return $out;
+ }
if ( ! $command ) {
- system "find $hostname -type f | sed 's,$hostname,,' > /tmp/$hostname.list";
- system "rsync -avv --files-from /tmp/$hostname.list root\@$hostname:/ $hostname/"
+ pull_changes $hostname;
} elsif ( $command eq 'add' ) {
+ mkpath "$hostname/$dir" unless -e "$hostname/$dir";
system 'rsync', '-avv', "root\@$hostname:$path", "$hostname/$path";
- system 'git', 'add', "$hostname/$path";
+ print $client git 'add', "$hostname/$path";
} elsif ( $command eq 'commit' ) {
- system 'rsync', '-avv', "root\@$hostname:$path", "$hostname/$path" if $path;
- $message ||= "$command $hostname $path";
- system 'git', 'commit', '-m', $message, "$hostname/$path";
- } elsif ( $command =~ m{(diff|status|log)} ) {
- my $opt = '--summary' if $command eq 'log';
- print $client `git $command $opt $hostname`;
+ pull_changes $hostname;
+ $message =~ s/'/\\'/g;
+ $user =~ s/\/$//;
+ print $client git( "commit -m '$message' --author '$user <$hostname>' $backup_path" );
+ } elsif ( $command =~ m{(diff|status|log|ch)} ) {
+ $command .= ' --stat' if $command eq 'log';
+ $command = 'log --patch-with-stat' if $command =~ m/^ch/;
+ pull_changes( $hostname ) if $command eq 'diff';
+ if ( $on_host ) {
+ system 'rsync', '-avv', "root\@$on_host:$path", "$on_host/$path";
+ open(my $diff, '-|', "diff -Nuw $hostname$path $on_host$path");
+ while(<$diff>) {
+ print $client $_;
+ }
+ } else {
+ # commands without path will show host-wide status/changes
+ print $client git($command, $rel_path ? $backup_path : $hostname);
+ }
} elsif ( $command eq 'revert' ) {
- print $client `git checkout -- $hostname/$path`;
- system 'rsync', '-avv', "$hostname/$path", "root\@$hostname:$path";
+ if ( $on_host ) {
+ system 'rsync', '-avv', "$on_host/$path", "root\@$hostname:$path";
+ } else {
+ print $client git "checkout -- $hostname/$path";
+ system 'rsync', '-avv', "$hostname/$path", "root\@$hostname:$path";
+ }
} else {
print $client "Unknown command: $command\n";
}
projects / bak-git.git / blobdiff