error handling

install

@@ -325,19 +325,22 @@ function ee_update_latest()
     fi
 
     if [ "$ee_distro_version" == "trusty" ]; then
-
         if [ -f /etc/apt/sources.list.d/ondrej-php5-5_6-trusty.list ]; then
            # add-apt-repository -y --remove 'ppa:ondrej/php5-5.6'
             add-apt-repository -y 'ppa:ondrej/php'
-            rm -f /etc/apt/sources.list.d/ondrej-php5-5_6-trusty.list &>> /dev/null
-            apt-get update
-		    apt-get -y install php5.6-fpm php5.6-curl php5.6-gd php5.6-imap php5.6-mcrypt php5.6-readline php5.6-mysql php5.6-cli php5.6-common php7.0-common php-memcached php-imagick memcached graphviz php-pear php-xdebug
-            cp -f /etc/php5/fpm/pool.d/www.conf /etc/php/5.6/fpm/pool.d/www.conf
-            cp -f /etc/php5/fpm/pool.d/debug.conf /etc/php/5.6/fpm/pool.d/debug.conf
-            cp -f /etc/php5/fpm/php.ini /etc/php/5.6/fpm/php.ini
-            cp -f /etc/php5/fpm/php-fpm.conf /etc/php/5.6/fpm/php-fpm.conf
+            apt-get update 2&>>1 $EE_INSTALL_LOG
+		    apt-get -y install php5.6-fpm php5.6-curl php5.6-gd php5.6-imap php5.6-mcrypt php5.6-readline php5.6-mysql php5.6-cli php5.6-common php7.0-common php-memcached php-imagick memcached graphviz php-pear php-xdebug || ee_lib_error "Unable to install depedencies, exit status " 1
+            if [ -e /etc/php5/fpm/pool.d/www.conf -a -e /etc/php5/fpm/pool.d/debug.conf -a -e /etc/php5/fpm/php.ini -a -e /etc/php5/fpm/php-fpm.conf ]; then
+                cp -f /etc/php5/fpm/pool.d/www.conf /etc/php/5.6/fpm/pool.d/www.conf &>> /dev/null
+                cp -f /etc/php5/fpm/pool.d/debug.conf /etc/php/5.6/fpm/pool.d/debug.conf &>> /dev/null
+                cp -f /etc/php5/fpm/php.ini /etc/php/5.6/fpm/php.ini &>> /dev/null
+                cp -f /etc/php5/fpm/php-fpm.conf /etc/php/5.6/fpm/php-fpm.conf &>> /dev/null
+            else
+                echo "Some files are missing." || ee_lib_error "Unable to configure PHP5.6 packages, exit status " 1
+            fi
             service php5-fpm stop &>> /dev/null
             service php5.6-fpm restart &>> /dev/null
+            rm -f /etc/apt/sources.list.d/ondrej-php5-5_6-trusty.list &>> /dev/null
             apt-get remove -y php5-fpm php5-curl php5-gd php5-imap php5-mcrypt php5-common php5-readline php5-mysql php5-cli php5-memcache php5-imagick memcached graphviz php-pear
         fi
     fi