ElementaryOS 0.4: Install Trac for project management

#!/bin/sh

[ -z "${ADMIN_PASSWD}" ] && ADMIN_PASSWD="admin_passwd"
[ -z "${USER_NAME}" ] && USER_NAME="guest"
[ -z "${USER_PASSWD}" ] && USER_PASSWD="guest_passwd"

trac_install()
{
  sudo apt install -y trac libapache2-mod-wsgi apache2

  sudo a2enmod auth_digest

  sudo mkdir /var/lib/trac
  sudo mkdir /var/www/html/trac
  sudo chown www-data:www-data /var/www/html/trac
}

create_project()
{
  proj=$1

  sudo trac-admin /var/lib/trac/"${proj}" initenv "${proj}" sqlite:db/trac.db
  sudo trac-admin /var/lib/trac/"${proj}" deploy /var/www/html/trac/"${proj}"
  sudo chown -R www-data:www-data /var/lib/trac/"${proj}"
  sudo chown -R www-data:www-data /var/www/html/trac/"${proj}"

  yes "${ADMIN_PASSWD}" | \
    sudo htdigest -c /var/lib/trac/"${proj}"/.htdigest "${proj}" admin
  sudo trac-admin /var/lib/trac/"${proj}" permission add admin TRAC_ADMIN

  yes "${USER_PASSWD}" | \
    sudo htdigest /var/lib/trac/"${proj}"/.htdigest "${proj}" "${USER_NAME}"

  cat <<EOF | sudo tee /etc/apache2/sites-available/${proj}.conf
<VirtualHost _default_:443>
  SSLEngine on
  SSLCertificateFile    /etc/ssl/certs/ssl-cert-snakeoil.pem
  SSLCertificateKeyFile /etc/ssl/private/ssl-cert-snakeoil.key
</VirtualHost>

WSGIScriptAlias /trac/${proj} /var/www/html/trac/${proj}/cgi-bin/trac.wsgi
<Location /trac/${proj}>
  AuthType Digest
  AuthName "${proj}"
  AuthUserFile /var/lib/trac/${proj}/.htdigest
  Require valid-user
</Location>
EOF

  sudo a2enmod ssl
  sudo a2ensite "${proj}"
  sudo systemctl restart apache2
}

trac_main()
{
  trac_install
  create_project test
  create_project OtherProject
}

trac_main