#!/bin/bash
#
# This is CS50 install!
#
# To run, sudo su and then type 
# "curl -L http://path-to-50/install50 | /bin/bash"
#

UPDATER=http://mirror.cs50.net/appliance50/19/source/latest/updater

export PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

eche() { echo "$@" >&2; }

echo "Installing virtualization detection"
yum -y install virt-what

# get virtualization platform
declare vmm=$(/sbin/virt-what)

# fix eth{0,1,2}, per http://www.freedesktop.org/wiki/Software/systemd/PredictableNetworkInterfaceNames/
rm /lib/udev/rules.d/80-net-name-slot.rules
ln -s /dev/null /lib/udev/rules.d/80-net-name-slot.rules

if [ $vmm = 'xen' ]
then
    echo "Detected ec2"

    echo "Setting swap to /dev/xvdb"
    mkswap /dev/xvdb
    swapon /dev/xvdb
    echo "/dev/xvdb  swap swap    defaults,noatime 0 0" >> /etc/fstab

    echo "Installing prerequisite packages for update50"
    yum -y install unzip

fi

echo "Installing xfce-desktop"
yum --skip-broken -y groupinstall xfce-desktop

echo "Running update50"
/bin/curl -L --max-redirs 10 $UPDATER | /bin/bash >/var/log/install50.log 2>&1

echo -n "Fixing fonts.. "
yum -y reinstall fontconfig

echo "Resetting ~jharvard/.ssh"
mkdir -m 0700 /home/jharvard/.ssh
touch /home/jharvard/.ssh/{authorized_keys,config,known_hosts}
chown -R jharvard:students /home/jharvard/.ssh
chmod 0600 /home/jharvard/.ssh/{authorized_keys,config,known_hosts}

if [ $vmm = 'xen' ]
then
    echo "Installing generic packages"
    echo "remove fedora-logos fedora-release fedora-release-notes
install generic-logos generic-release generic-release-notes
run" | yum -y shell
fi

echo "Update grub"
grub2-mkconfig -o /boot/grub2/grub.cfg

echo "Removing rpmnew files"
find / -name '*.rpmnew' -type f -delete

echo "Removing some unnecessary ~jharvard dirs"
/bin/rmdir /home/jharvard/{Documents,Music,Pictures,Public,Templates,Videos}

if [ $vmm = 'xen' ]
then
    # enable password authentication
    sed -i 's/^PasswordAuthentication no/PasswordAuthentication yes/g' /etc/ssh/sshd_config
    service sshd reload

    # guacamole install
    /bin/mv /etc/guacamole/user-mapping.xml.rpmsave /etc/guacamole/user-mapping.xml
    /bin/rm -rf /var/lib/tomcat/webapps/ROOT/
    /bin/ln -s /var/lib/guacamole/guacamole.war /var/lib/tomcat/webapps/ROOT.war
    /bin/ln -s /etc/guacamole/guacamole.properties /usr/share/tomcat/lib
    /sbin/service tomcat restart
    /sbin/service guacd start
    /sbin/chkconfig tomcat on
    /sbin/chkconfig guacd on
    /bin/systemctl --system daemon-reload
    /bin/systemctl enable vncserver.service
    /bin/systemctl start vncserver.service

    cat > /etc/rc.d/rc.local << "EOF"
#!/bin/bash
## custom password for EC2 (trim leading and trailing whitespace)
# http://docs.amazonwebservices.com/AWSEC2/latest/UserGuide/AESDG-chapter-instancedata.html
PASSWORD=`/usr/bin/wget --output-document=- --quiet --timeout=5 --tries=10 http://169.254.169.254/latest/user-data`
if [ $? -eq 0 ]; then
    # remove leading and trailing spaces and double-quotes
    PASSWORD=`/bin/echo "$PASSWORD" | /usr/bin/perl -p -e 's/^\s*(.*)\s*$/$1/g' | sed -e 's/"//g'`
    if [ -z "$PASSWORD" ]; then
        seedNum=`date +%N`$$
        randomStr=$( echo $seedNum | md5sum | md5sum )
        PASSWORD="${randomStr:4:16}"
    fi
    /bin/echo "$PASSWORD" | /usr/bin/passwd --stdin jharvard
    /bin/echo -e "$PASSWORD\n$PASSWORD" | /usr/bin/smbpasswd -a -s jharvard
    /bin/mysqladmin -u jharvard -p"crimson" password "$PASSWORD"
    /bin/echo "<user-mapping>
    <!-- Per-user authentication and config information -->
    <authorize username=\"jharvard\" password=\"$PASSWORD\">
      <connection name=\"appliance50\">
        <protocol>vnc</protocol>
        <param name=\"hostname\">127.0.0.1</param>
        <param name=\"port\">5901</param>
        <param name=\"password\">crimson</param>
      </connection>
    </authorize>
</user-mapping>" >/etc/guacamole/user-mapping.xml
#/bin/rm -f /etc/sysconfig/network-scripts/ifcfg-eth1
#/bin/rm -f /etc/sysconfig/network-scripts/ifcfg-eth2
fi
EOF
    chmod +x /etc/rc.d/rc.local
    /etc/rc.d/rc.local

    # add code that will create /etc/id50 once and then remove itself from rc.local
    cat >>/etc/rc.d/rc.local <<EOF
#rm{
/usr/bin/uuid -v 4 >/etc/id50; /bin/chmod 444 /etc/id50;
/bin/sed -i '/#rm{/,/$/d' /etc/rc.d/rc.local
EOF

else

    # machine is not EC2 (virtualized or bare metal)
    URL=http://mirror.cs50.net/appliance50/19/source/iso
    TMP=/var/tmp

    cat > /etc/rc.d/rc.local <<EOF
#!/bin/bash
# run update50, but only to perform final steps
/bin/bash <(/bin/curl -L --max-redirs 10 $UPDATER 2>/dev/null) NO_PACKAGES

# remove kickstart
/bin/rm /root/anaconda-ks.cfg

case \$(/sbin/virt-what) in
parallels)
    # download and mount Parallels Tools
    # /Applications/Parallels Desktop.app/Contents/Resources/Tools/prl-tools-lin.iso
    /usr/bin/wget --directory-prefix=$TMP $URL/prl-tools-lin.iso
    /bin/mount -r -o loop -t iso9660 $TMP/prl-tools-lin.iso /mnt

    # install Parallels Tools
    /mnt/install --install-unattended
    /bin/rm -f /home/jharvard/Desktop/Parallels\ Shared\ Folders

    # tidy up
    /bin/umount /mnt
    /bin/rm -f $TMP/prl-tools-lin.iso
;;
virtualbox)
    # download and mount VirtualBox Guest Additions
    # http://download.virtualbox.org/virtualbox/4.2.18/VBoxGuestAdditions_4.2.18.iso
    /usr/bin/wget --directory-prefix=$TMP $URL/VBoxGuestAdditions_4.2.18.iso
    /bin/mount -r -o loop -t iso9660 $TMP/VBoxGuestAdditions_4.2.18.iso /mnt

    # install VirtualBox Guest Additions
    /mnt/VBoxLinuxAdditions.run --nox11

    # tidy up
    /bin/umount /mnt
    /bin/rm -f $TMP/VBoxGuestAdditions_4.2.18.iso
;;
vmware)
    # download and mount VMware Tools
    # http://softwareupdate.vmware.com/cds/vmw-desktop/fusion/5.0.3/1040386/packages/com.vmware.fusion.tools.linux.zip.tar
    /usr/bin/wget --directory-prefix=$TMP $URL/linux.iso
    /bin/mount -r -o loop -t iso9660 $TMP/linux.iso /mnt
    /bin/tar xf /mnt/VMwareTools-9.2.2-893683.tar.gz -C $TMP

    # install VMware Tools
    #$TMP/vmware-tools-distrib/vmware-install.pl -d

    # tidy up
    /bin/rm -rf $TMP/vmware-tools-distrib
    /bin/umount /mnt
    /bin/rm -f $TMP/linux.iso
;;
esac

/bin/rm -f /etc/rc.d/rc.local

cat >/etc/rc.d/rc.local <<E
#!/bin/bash
/bin/rmdir /home/jharvard/{Documents,Music,Pictures,Public,Templates,Videos}
/usr/bin/uuid -v 4 >/etc/id50; /bin/chmod 444 /etc/id50
/bin/rm /etc/rc.d/rc.local
E
chmod +x /etc/rc.d/rc.local
EOF
    chmod +x /etc/rc.d/rc.local

fi