Merge pull request #1008 from pi-hole/feature/track_pre-installed_packages

Feature/track pre installed packages

automated install/basic-install.sh

@@ -97,9 +97,6 @@ if command -v apt-get &> /dev/null; then
   LIGHTTPD_CFG="lighttpd.conf.debian"
   DNSMASQ_USER="dnsmasq"
 
-  package_check_install() {
-    dpkg-query -W -f='${Status}' "${1}" 2>/dev/null | grep -c "ok installed" || ${PKG_INSTALL} "${1}"
-  }
 elif command -v rpm &> /dev/null; then
   # Fedora Family
   if command -v dnf &> /dev/null; then
@@ -107,25 +104,22 @@ elif command -v rpm &> /dev/null; then
   else
     PKG_MANAGER="yum"
   fi
-  # Fedora and family update cache on every PKG_INSTALL call, no need for a separate update.
+
+# Fedora and family update cache on every PKG_INSTALL call, no need for a separate update.
   UPDATE_PKG_CACHE=":"
   PKG_INSTALL="${PKG_MANAGER} install -y"
   PKG_COUNT="${PKG_MANAGER} check-update | egrep '(.i686|.x86|.noarch|.arm|.src)' | wc -l"
   INSTALLER_DEPS=(git iproute net-tools newt procps-ng)
-  PIHOLE_DEPS=(bc bind-utils cronie curl dnsmasq epel-release findutils lighttpd lighttpd-fastcgi nmap-ncat php php-common php-cli sudo unzip wget)
+  PIHOLE_DEPS=(bc bind-utils cronie curl dnsmasq findutils lighttpd lighttpd-fastcgi nmap-ncat php php-common php-cli sudo unzip wget)
 
-  if grep -q 'Fedora' /etc/redhat-release; then
+  if ! grep -q 'Fedora' /etc/redhat-release; then
-    remove_deps=(epel-release);
+    INSTALLER_DEPS=("${INSTALLER_DEPS[@]}" "epel-release");
-    PIHOLE_DEPS=( ${PIHOLE_DEPS[@]/$remove_deps} );
   fi
     LIGHTTPD_USER="lighttpd"
     LIGHTTPD_GROUP="lighttpd"
     LIGHTTPD_CFG="lighttpd.conf.fedora"
     DNSMASQ_USER="nobody"
 
-    package_check_install() {
-      rpm -qa | grep ^"${1}"- > /dev/null || ${PKG_INSTALL} "${1}"
-    }
 else
   echo "OS distribution not supported"
   exit
@@ -751,16 +745,45 @@ install_dependent_packages() {
   # Install packages passed in via argument array
   # No spinner - conflicts with set -e
   declare -a argArray1=("${!1}")
+  declare -a installArray
 
+  # Debian based package install - debconf will download the entire package list
+  # so we just create an array of packages not currently installed to cut down on the
+  # amount of download traffic.
+  # NOTE: We may be able to use this installArray in the future to create a list of package that were
+  # installed by us, and remove only the installed packages, and not the entire list.
   if command -v debconf-apt-progress &> /dev/null; then
-    debconf-apt-progress -- ${PKG_INSTALL} "${argArray1[@]}"
-  else
     for i in "${argArray1[@]}"; do
       echo -n ":::    Checking for $i..."
-      package_check_install "${i}" &> /dev/null
+      if dpkg-query -W -f='${Status}' "${i}" 2>/dev/null | grep "ok installed" &> /dev/null; then
         echo " installed!"
-    done
+      else
+        echo " added to install list!"
+        installArray+=("${i}")
       fi
+    done
+    if [[ ${#installArray[@]} -gt 0 ]]; then
+      debconf-apt-progress -- ${PKG_INSTALL} "${installArray[@]}"
+      return
+    fi
+      return 0
+  fi
+
+  #Fedora/CentOS
+  for i in "${argArray1[@]}"; do
+    echo -n ":::    Checking for $i..."
+    if ${PKG_MANAGER} -q list installed "${i}" &> /dev/null; then
+      echo " installed!"
+    else
+      echo " added to install list!"
+      installArray+=("${i}")
+    fi
+  done
+    if [[ ${#installArray[@]} -gt 0 ]]; then
+      ${PKG_INSTALL} "${installArray[@]}" &> /dev/null
+      return
+    fi
+    return 0
 }
 
 CreateLogFile() {