Add a minimal install option (no Apache)

Now that we have a CLI, the web UI is optional. Well, optional in the
sense that you don't strictly need it, but truth be told it is still a
lot nicer to use.  But, maybe you don't want to run a web server on your
machine, or maybe you want to do the analysis on one system and display
it using another.  This should all be possible now.

Signed-off-by: Brian Warner <brian@bdwarner.com>

utilities/install_deps.sh → utilities/install_deps-full.sh

@@ -16,8 +16,21 @@
 #
 # SPDX-License-Identifier:	Apache-2.0
 
+echo "
+This script will install the necessary dependencies to run Facade in either
+headless mode or using the web UI.  It will install Apache and the required PHP
+packages.  You can use either the web UI or the CLI to configure Facade and
+export analysis data.
+
+Installing any missing dependencies...
+"
 
 sudo apt-get install apache2 mysql-client mysql-server php-cli php-mysql \
 python3 python3-mysqldb libapache2-mod-php php-dom php-curl python3-bcrypt \
 python3-xlsxwriter python3-texttable
 
+echo "
+If everything went well, your next step is to run setup:
+ $ ./setup.py
+"
+

utilities/install_deps-minimal.sh

@@ -0,0 +1,39 @@
+#!/bin/bash
+
+# Copyright 2016-2018 Brian Warner
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier:	Apache-2.0
+
+echo "
+This script will install the necessary dependencies to run Facade in headless
+mode. This means that it will not install Apache or the required PHP packages.
+You must use the CLI to configure Facade and export analysis data, which is
+available in cli/facade.py
+
+You can always convert to a full installation by running the full script to fill
+in any missing packages, should you change your mind later:
+ $ ./install_deps-deb-full.sh
+
+Installing any missing dependencies...
+"
+
+sudo apt-get install mysql-client mysql-server \
+python3 python3-mysqldb python3-bcrypt python3-xlsxwriter python3-texttable
+
+echo "
+If everything went well, your next step is to run setup:
+ $ ./setup.py
+ "
+