#! /bin/sh

# $Id$

########################################################################
# Aegir quick install script
#
# This script takes care of deploying all the required PHP scripts for
# the frontend to run properly. It should be ran as the Aegir user.
#
# It should keep to strict POSIX shell syntax to ensure maximum
# portability. The aim here is to ease the burden on porters but also
# allow people using various platforms to zip through the install
# quicker.
#
# This script also *DOES NOT CHECK* if the requirements have been met.
# It's up to the admin to follow the proper install instructions or use
# the packages provided by their platform.
########################################################################
# This script takes the following steps:
#
# 1. parse commandline
# 2. prompt for confirmation
# 3. creates a basic directory structure in $AEGIR_HOME
# 4. downloads drush in $AEGIR_HOME
# 5. downloads drush_make in $AEGIR_HOME/.drush
# 6. downloads provision in $AEGIR_HOME/.drush
# 7. deploys hostmaster in $AEGIR_HOME using drush
# 8. creates an apache config file in $AEGIR_HOME/config/vhost.d
#
########################################################################
# basic variables, change before release
AEGIR_DOMAIN=aegir.example.com 
AEGIR_VERSION=HEAD
AEGIR_HOME=$HOME
WEB_GROUP=www-data
# doesn't exist yet, but we need drush_prompt in HEAD
DRUSH_VERSION=6.x-3.0-rc3
DRUSH_MAKE_VERSION=6.x-2.0-beta6

# when adding a variable here, add it to the display below

########################################################################
# functions

# noticeable messages
msg() {
  echo "==> $*"
}

# simple prompt
prompt_yes_no() {
  while true ; do
    printf "$* [Y/n] "
    read answer
    if [ -z "$answer" ] ; then
      return 0
    fi
    case $answer in
      [Yy]|[Yy][Ee][Ss])
        return 0
        ;;
      [Nn]|[Nn][Oo])
        return 1
        ;;
      *)
        echo "Please answer yes or no"
        ;;
    esac
 done 

}

usage() {
  cat <<EOF
Usage: $0 [ -V version ] [ -h ] [ -w group ] [ -d home ] hostname
EOF
}

########################################################################
# Main script

# stop on error
set -e

# parse commandline
args=`getopt bV:w:d:h $*`
set -- $args

for i
do
  case "$i" in
    -w) shift; WEB_GROUP=$1; shift;;
    -V) shift; AEGIR_VERSION=$1; shift;;
    -d) shift; AEGIR_HOME=$1; shift;;
    -b) BACKEND_ONLY=1; shift;;
    -h) shift; usage; exit;;
    --) shift; break;;
  esac
done

AEGIR_DOMAIN=${1:-$AEGIR_DOMAIN}
DRUSH="$AEGIR_HOME/drush/drush.php"
HOSTMASTER_DIR=$AEGIR_HOME/hostmaster-$AEGIR_VERSION

msg "Aegir automated install script"

if [ `whoami` = "root" ] ; then
  msg "This script should be ran as a non-root user"
  exit 1
fi

msg "This script makes the following assumptions: "
cat <<EOF
 * you have read INSTALL.txt and prepared the platform accordingly
 * you are running as your "aegir" user
 * the following settings are correct:
AEGIR_DOMAIN=$AEGIR_DOMAIN
AEGIR_VERSION=$AEGIR_VERSION
AEGIR_HOME=$AEGIR_HOME
WEB_GROUP=$WEB_GROUP
HOSTMASTER_DIR=$HOSTMASTER_DIR
DRUSH=$DRUSH
DRUSH_VERSION=$DRUSH_VERSION

Some of those settings can be changed on the commandline, see:

 $0 -h

for more information.
EOF

if prompt_yes_no "Do you want to proceed with the install?" ; then
  true
else
  echo "installation aborted by user"
  exit 1
fi

msg "Creating basic directory structure"
mkdir -p $AEGIR_HOME/config/vhost.d
mkdir -p $AEGIR_HOME/config/platform.d
mkdir -p $AEGIR_HOME/config/apache.d
mkdir -p $AEGIR_HOME/backups
chmod 0711 $AEGIR_HOME/config
chmod 0700 $AEGIR_HOME/backups

# we need to check both because some platforms (like SunOS) return 0 even if the binary is not found
if which drush 2> /dev/null && which drush | grep -v 'no drush in' > /dev/null; then
  msg "Drush is in the path, good"
  DRUSH=drush
elif [ -x $DRUSH ] ; then
  msg "Drush found in $DRUSH, good"
  DRUSH="php $AEGIR_HOME/drush/drush.php"
else
  msg "Installing drush in $AEGIR_HOME"
  cd $AEGIR_HOME
  wget http://ftp.drupal.org/files/projects/drush-$DRUSH_VERSION.tar.gz
  gunzip -c drush-$DRUSH_VERSION.tar.gz | tar -xf -
  rm drush-$DRUSH_VERSION.tar.gz
  DRUSH="php $AEGIR_HOME/drush/drush.php"
fi

if $DRUSH help > /dev/null ; then
  msg "Drush seems to be functionning properly"
else
  msg "Drush is broken ($DRUSH help failed)"
  exit 1
fi

if $DRUSH help | grep "^ make" > /dev/null ; then
  msg "Drush make already seems to be installed"
else
  msg "Installing drush make in $AEGIR_HOME/.drush"
  mkdir -p $AEGIR_HOME/.drush
  $DRUSH dl drush_make-$DRUSH_MAKE_VERSION --destination=$AEGIR_HOME/.drush
fi

if $DRUSH help | grep "^ provision-install" > /dev/null ; then
  msg "Provision already seems to be installed"
else
  msg "Installing provision backend in $AEGIR_HOME/.drush"
  mkdir -p $AEGIR_HOME/.drush
  if [ "$AEGIR_VERSION" = "HEAD" ]; then
    git clone git://git.aegirproject.org/provision $AEGIR_HOME/.drush/provision
  else
    cd $AEGIR_HOME/.drush
    wget http://files.aegirproject.org/provision-$AEGIR_VERSION.tgz
    gunzip -c provision-$AEGIR_VERSION.tgz | tar -xf -
    rm provision-$AEGIR_VERSION.tgz
  fi
fi

# this will prompt the user for the database password if not provided through stdin in JSON
$DRUSH provision-verify --parent_path="$AEGIR_HOME" --web_group="$WEB_GROUP" --drush_path="$DRUSH"

msg "Aegir provision backend installed successfully"

if [ ! -z "$BACKEND_ONLY" ] ; then
  exit 0
fi

if [ ! -d $HOSTMASTER_DIR ] ; then
  msg "Deploying hostmaster application"
  $DRUSH hostmaster-make $HOSTMASTER_DIR
  # this, and the remaining of this file, should be handled by
  # provision-install, see http://drupal.org/node/711740
  cd $HOSTMASTER_DIR
  mkdir sites/$AEGIR_DOMAIN
  cp sites/default/default.settings.php sites/$AEGIR_DOMAIN/settings.php
  chmod g+w sites/$AEGIR_DOMAIN/settings.php
  mkdir sites/$AEGIR_DOMAIN/files
  chmod 2770 sites/$AEGIR_DOMAIN/files
  chgrp $WEB_GROUP sites/$AEGIR_DOMAIN/settings.php
  chgrp $WEB_GROUP sites/$AEGIR_DOMAIN/files
fi

if [ ! -f $AEGIR_HOME/config/vhost.d/$AEGIR_DOMAIN ]; then
  sed -e "s#DocumentRoot .*#DocumentRoot $HOSTMASTER_DIR#" -e "s#Directory .*#Directory $HOSTMASTER_DIR>#" -e "s/ServerName .*/ServerName $AEGIR_DOMAIN/" $HOSTMASTER_DIR/profiles/hostmaster/apache2.conf.txt > $AEGIR_HOME/config/vhost.d/$AEGIR_DOMAIN
  msg "Installed apache configuration file for $AEGIR_DOMAIN, you will need to restart apache"
fi

msg "Install process complete: follow the wizard"

cat <<EOF
Now point your browser to http://$AEGIR_DOMAIN/install.php and proceed
with the remainder of the installation using the Hostmaster Install profile.
Some of the instructions given, you will already have completed, but carefully
read each step in turn to ensure you don't miss anything.
EOF