Initial implementation of Travis-CI automation

Add a simple travis configuration file to automate testing software
builds on each pull request. Travis-CI is a continuous integration
service that automates building and testing software. As a starting
point, the travis script simply clones the repository branch and
attempts to configure EGSnrc with default parameters, to trap basic
configuration failures.

Add a configure.expect script to answer the EGSnrc configuration script
questions automatically. This requires the expect utility to be
available.

Adjust the egsnrc_bashrc_additions to avoid returning an error when
optional local additions files don't exist.

Ensure the travis check fails when any part of the configuration fails.
Some critical failures cause the configuration to abort with status 1
(error), but most failures merely echo a "failed" status to the
terminal, hence travis does not trap those because it reports failure
upon a non-zero return value. As a quick solution, tee the configuration
terminal output message to file and use grep to trigger a status of 1
if the file contains "fail":

! grep -i fail configure.log

.travis.yml

@@ -0,0 +1,26 @@
+language: bash
+
+addons:
+  apt:
+    packages:
+      - gfortran
+      - gcc
+      - g++
+      - expect
+
+before_install:
+  - sudo apt-get -qq update
+  - sudo apt-get install -y grace
+  - sudo apt-get install -y libmotif-dev
+
+install:
+  - HEN_HOUSE/scripts/configure.expect linux.conf | tee configure.log
+
+script:
+  - pwd
+  - for f in HEN_HOUSE/log/*.log configure.log; do echo $f; cat $f; done
+  - (! grep -i fail configure.log)
+  - export EGS_HOME=/home/travis/build/nrc-cnrc/EGSnrc/egs_home
+  - export EGS_CONFIG=/home/travis/build/nrc-cnrc/EGSnrc/HEN_HOUSE/specs/linux.conf
+  - source /home/travis/build/nrc-cnrc/EGSnrc/HEN_HOUSE/scripts/egsnrc_bashrc_additions
+  - date

HEN_HOUSE/scripts/configure.expect

@@ -0,0 +1,50 @@
+#!/usr/bin/expect -f
+
+set timeout -1
+
+# configuration filename
+set confname "expect.conf"
+if {$argc > 0} {
+    set confname [lindex $argv 0]
+}
+
+# clear environment variables
+set env(HEN_HOUSE)  ""
+set env(EGS_CONFIG) ""
+set env(EGS_HOME)   ""
+
+# spawn EGSnrc configuration script
+spawn HEN_HOUSE/scripts/configure
+
+# Information
+expect "Press enter to continue."                       { send "\n" }
+
+# Fortran compiler
+expect "Input fortran compiler:"                        { send "\n" }
+expect "Input standard compilation flags:"              { send "\n" }
+expect "Input optimization flags:"                      { send "\n" }
+expect "Input flags for debugging:"                     { send "\n" }
+expect "Input libraries that your compiler may need:"   { send "\n" }
+
+# C compiler
+expect "Input the one you would like to use:"           { send "\n" }
+expect "Input C compiler flags to use:"                 { send "\n" }
+
+# Configuration
+expect "Input path to EGSnrc HEN_HOUSE directory:"      { send "\n" }
+expect "Choose a configuration file name:"              { send "$confname\n" }
+set timeout 1
+expect "Do you want to overwrite ?"                     { puts "no\n"; exit }
+set timeout -1
+
+# C++ compiler
+expect "Input C++ compiler:"                            { send "\n" }
+expect "Input option to change, or enter to proceed:"   { send "\n" }
+
+# Finalize for user
+expect "Do you want to finalize"                        { send "yes\n" }
+expect "Press enter to continue."                       { send "\n" }
+
+expect "Choose a directory for your user codes:"        { send "\n" }
+expect "Choose 1 (all), 2 (some) or 3 (none):"          { send "1\n" }
+expect "EOF"

HEN_HOUSE/scripts/egsnrc_bashrc_additions

@@ -111,10 +111,14 @@ export HEN_HOUSE PATH
 
 # Now check for local system wide sh additions
 #
-test -f $HEN_HOUSE/scripts/local_bashrc_additions && \. $HEN_HOUSE/scripts/local_bashrc_additions
+if test -f $HEN_HOUSE/scripts/local_bashrc_additions; then
+    source $HEN_HOUSE/scripts/local_bashrc_additions
+fi
 
 # Every individual user may customize their settings by creating a
 # .egsnrc_bashrc_additions file in their HOME directory.
 # Source this file if available
 #
-test -f $HOME/.egsnrc_bashrc_additions && \. $HOME/.egsnrc_bashrc_additions
+if test -f $HOME/.egsnrc_bashrc_additions; then
+    source $HOME/.egsnrc_bashrc_additions
+fi