<?php
//
// /etc/yum.conf for production nodes
//
// Mark Huang <mlhuang@cs.princeton.edu>
// Copyright (C) 2004-2006 The Trustees of Princeton University
//
// $Id$
//

// For PLC_NAME and PLC_BOOT_HOST
include('plc_config.php');

$PLC_NAME = PLC_NAME;
$PLC_BOOT_HOST = PLC_BOOT_HOST;

////////////////////////////// mirror list

// Requesting a mirror list. Yum bombs out completely if a repository
// is (even temporarily) unavailable, so if CoBlitz is down, provide a
// few more options. Make sure that gpgcheck remains enabled.  Last
// chance option is ourselves so that yum never fails.
if (isset($_REQUEST['mirrorlist']) &&
    isset($_REQUEST['repo']) &&
    isset($_REQUEST['releasever'])) {
  $mirrors = array("http://coblitz.codeen.org/coblitz.planet-lab.org/pub/fedora/linux",
		   "http://fedora.gtlib.cc.gatech.edu/pub/fedora.redhat/linux",
		   "http://download.fedoraproject.org/pub/fedora/linux",
		   "http://mirrors.kernel.org/fedora");
		   #"ftp://rpmfind.net/linux/fedora",  still uses the old style of directory hierarchy
  $releasever = $_REQUEST['releasever'];
  switch ($_REQUEST['repo']) {
  case "base":
  	if ( intval($releasever) >= 7 )
	{
		foreach ($mirrors as $mirror) {
		  echo "$mirror/releases/$releasever/Everything/\$ARCH/os/\n";
		}

	} else {
		foreach ($mirrors as $mirror) {
		  echo "$mirror/core/$releasever/\$ARCH/os/\n";
		}
	}
    break;
  case "updates":
  	if ( intval($releasever) >= 7 )
	{
		foreach ($mirrors as $mirror) {
		  echo "$mirror/updates/$releasever/\$ARCH/\n";
		}

	} else {
		foreach ($mirrors as $mirror) {
		  echo "$mirror/core/updates/$releasever/\$ARCH/\n";
		}
	}
    break;
  }

  // Always list ourselves last
  echo "https://$PLC_BOOT_HOST/install-rpms/planetlab/\n";
  exit;
}

////////////////////////////// plain yum.conf 

// Get admin API handle
require_once 'plc_api.php';
global $adm;

// Requesting yum.conf. See above for the mirrorlist definition.

if (isset($_REQUEST['gpgcheck'])) {
  $gpgcheck = $_REQUEST['gpgcheck'];
} else {
  $gpgcheck = 0;
}

// fedora stock : base & updates 

echo <<<__STD_REPOS__
[main]
# Do not scan /etc/yum.repos.d/
reposdir=/dev/null
cachedir=/var/cache/yum
debuglevel=2
logfile=/var/log/yum.log
pkgpolicy=newest
gpgcheck=$gpgcheck

[base]
name=Fedora Core \$releasever - \$basearch - Base
mirrorlist=https://$PLC_BOOT_HOST/PlanetLabConf/yum.conf.php?mirrorlist&repo=base&releasever=\$releasever
gpgcheck=$gpgcheck
# PlanetLab builds its own versions of these tools
exclude=kernel* iptables iproute

[updates]
name=Fedora Core \$releasever - \$basearch - Released Updates
mirrorlist=https://$PLC_BOOT_HOST/PlanetLabConf/yum.conf.php?mirrorlist&repo=updates&releasever=\$releasever
gpgcheck=$gpgcheck
# PlanetLab builds its own versions of these tools
exclude=kernel* iptables iproute

__STD_REPOS__;

echo "\n";

# get node family
if ( ! isset($_REQUEST['slicefamily'])) {
  # legacy : use the old naming scheme
  $nodefamily="planetlab";
  $pldistro="planetlab";
 } else {
  $slicefamily = $_REQUEST['slicefamily'];
  echo "# slicefamily $slicefamily \n" ;
  list( $pldistro, $fcdistro, $arch) = split ("-", $slicefamily);
  $nodefamily = "$pldistro-$arch";
  echo "# nodefamily $nodefamily \n" ;
 }

# the nodegroups the node is part of
$nodegroup_names=array();

if ( ! isset($_REQUEST['node_id'])) {
  print "# Warning : node_id not set\n";
 } else {
  $node_id=intval($_REQUEST['node_id']);
  echo "# node_id $node_id \n";
  # compute nodegroups
  $nodes = $adm->GetNodes(array('node_id'=>$node_id));
  $nodegroup_ids = $nodes[0]['nodegroup_ids'];
  $nodegroups = $adm->GetNodeGroups($nodegroup_ids);
  foreach ($nodegroups as $nodegroup) {
    $nodegroup_name = $nodegroup['name'];
    $nodegroup_names [] = $nodegroup_name;
    echo "# in nodegroup $nodegroup_name \n" ;
  }
 }

$topdir=$_SERVER['DOCUMENT_ROOT'] . "/install-rpms/";
$topurl="https://$PLC_BOOT_HOST" . "/install-rpms/";


# locate the planetlab repo for this node family & nodegroup
$repo=NULL;
foreach ($nodegroup_names as $nodegroup_name) {
  $groupdir = "$nodefamily-$nodegroup_name";
  # have we got a repo like /install-rpms/planetlab-i386-alpha ?
  echo "# trying " . $topdir . $groupdir . "\n";
  if (is_dir (realpath($topdir . $groupdir))) {
    $repo=array($pldistro, $groupdir, "$PLC_NAME $nodefamily $nodegroup_name");
    break;
  }
}

# if not found yet
if ( ! $repo) {
  echo "# trying default " . $topdir . $nodefamily . "\n";
  if (is_dir (realpath($topdir . $nodefamily))) {
    $repo = array($pldistro, $nodefamily, "$PLC_NAME $nodefamily regular");
  }
 }

# default: if we're here it's probably very wrong
if ( ! $repo) {
  echo "# WARNING: could not find a decent planetlab repo for this node\n";
  $repo = array ($pldistro, "planetlab", "default probably wrong");
 }

list( $id, $dir, $name) = $repo;

echo <<< __PLC_REPO__
[$id]
name=$name
baseurl=$topurl/$dir
gpgcheck=$gpgcheck
__PLC_REPO__;

#################### I guess this might go to trash, but just in case:
# mention if exist: install-rpms/planetlab-i386-3rdparty 
$optional_repos = array (array ('ThirdParty', '3rdparty','Third Party RPMS'));

foreach ($optional_repos as $repo) {
  list( $id, $dir, $name) = $repo;
  if (is_dir (realpath($topdir . $dir))) {
    echo <<< __OPT_REPO__
[$id]
name=$name
baseurl=$topurl/$dir
gpgcheck=$gpgcheck
__OPT_REPO__;

  }
}

?>