LegacyTechops/slack-dist/dist/slack-getroles

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#!/usr/bin/perl -w
# $Id: slack-getroles 180 2008-01-19 08:26:19Z alan $
# vim:sw=2
# vim600:fdm=marker
# Copyright (C) 2004-2008 Alan Sundell <alan@sundell.net>
# All Rights Reserved. This program comes with ABSOLUTELY NO WARRANTY.
# See the file COPYING for details.
# This script is in charge of copying files from the (possibly remote)
# master directory to a local cache, using rsync
require 5.006;
use warnings FATAL => qw(all);
use strict;
use sigtrap qw(die untrapped normal-signals
stack-trace any error-signals);
use File::Path;
use constant LIB_DIR => '/usr/lib/slack';
use lib LIB_DIR;
use Slack;
my @rsync = ('rsync',
'--links',
'--times',
);
(my $PROG = $0) =~ s#.*/##;
sub sync_list ();
########################################
# Environment
# Helpful prefix to die messages
$SIG{__DIE__} = sub { die "FATAL[$PROG]: @_"; };
# Set a reasonable umask
umask 077;
# Get out of wherever (possibly NFS-mounted) we were
chdir("/")
or die "Could not chdir /: $!";
# Autoflush on STDERR
select((select(STDERR), $|=1)[0]);
########################################
# Config and option parsing {{{
my $usage = Slack::default_usage("$PROG [options]");
$usage .= <<EOF;
--role-list
Role list location (can be relative to SOURCE)
--remote-role-list
Role list is remote and should be copied down with rsync
(implied by certain forms of role list or SOURCE)
EOF
# Option defaults
my %opt = ();
Slack::get_options(
opthash => \%opt,
command_line_options => [
'role-list=s',
'remote-role-list',
],
required_options => [ qw(role-list hostname) ],
usage => $usage,
);
# Prepare for backups
if ($opt{backup} and $opt{'backup-dir'}) {
# Make sure backup directory exists
unless (-d $opt{'backup-dir'}) {
($opt{verbose} > 0) and print STDERR "Creating backup directory '$opt{'backup-dir'}'\n";
if (not $opt{'dry-run'}) {
eval { mkpath($opt{'backup-dir'}); };
die "Could not mkpath backup dir '$opt{'backup-dir'}': $@\n" if $@;
}
}
push(@rsync, "--backup", "--backup-dir=$opt{'backup-dir'}");
}
# Pass options along to rsync
if ($opt{'dry-run'}) {
push @rsync, '--dry-run';
}
# Pass options along to rsync
if ($opt{'verbose'} > 1) {
push @rsync, '--verbose';
}
# }}}
# See if role-list is actually relative to source, and pre-pend source
# if need be.
unless ($opt{'role-list'} =~ m#^/# or
$opt{'role-list'} =~ m#^\./# or
$opt{'role-list'} =~ m#^[\w@\.-]+:#) {
if (not defined $opt{source}) {
die "Relative path to role-list given, but source not defined!\n\n$usage\n";
}
$opt{'role-list'} = $opt{source} . '/' . $opt{'role-list'};
}
# auto-detect remote role list
if ($opt{'role-list'} =~ m#^[\w@\.-]+:#) {
$opt{'remote-role-list'} = 1;
}
# Copy a remote list locally
if ($opt{'remote-role-list'}) {
# We need a cache directory if the role list is not local
if (not defined $opt{cache}) {
die "Remote path to role-list given, but cache not defined!\n\n$usage\n";
}
# Look at source type, and add options if necessary
if ($opt{'rsh'} or $opt{'role-list'} =~ m/^[\w@\.-]+::/) {
# This is tunnelled rsync, and so needs an extra option
if ($opt{'rsh'}) {
push @rsync, '-e', $opt{'rsh'};
} else {
push @rsync, '-e', 'ssh';
}
}
sync_list();
}
# Read in the roles list
my @roles = ();
my $host_found = 0;
($opt{verbose} > 0) and print STDERR "$PROG: Reading '$opt{'role-list'}'\n";
open(ROLES, "<", $opt{'role-list'})
or die "Could not open '$opt{'role-list'}' for reading: $!\n";
while(<ROLES>) {
s/#.*//; # Strip comments
chomp;
if (s/^$opt{hostname}:\s*//) {
$host_found++;
push @roles, split();
}
}
close(ROLES)
or die "Could not close '$opt{'role-list'}': $!\n";
if (not $host_found) {
die "Host '$opt{hostname}' not found in '$opt{'role-list'}'!\n";
}
print join("\n", @roles), "\n";
exit 0;
sub sync_list () {
my $source = $opt{'role-list'};
my $destination = $opt{cache} . "/_role_list";
unless (-d $opt{cache}) {
eval { mkpath($opt{cache}); };
die "Could not mkpath '$opt{cache}': $@\n" if $@;
}
# All this to run an rsync command
my @command = (@rsync, $source, $destination);
($opt{verbose} > 0) and print STDERR "$PROG: Calling '@command'\n";
Slack::wrap_rsync(@command);
$opt{'role-list'} = $destination;
}