Add support of configuration file for installation scripts.

bbb-pre-install.sh

@@ -3,14 +3,12 @@
 script_name="$(basename $(realpath $0))"
 working_dir="$(dirname $(realpath $0))"
 
-conf_file="${working_dir}/conf/${script_name%%.*}.conf"
+#conf_file="${working_dir}/conf/${script_name%%.*}.conf"
+conf_file="${working_dir}/conf/bbb.conf"
 
 LOCK_DIR="/tmp/$(basename $0).$$.LOCK"
 log_file="${LOCK_DIR}/${script_name%%.*}.log"
 
-DIST="ubuntu"
-DIST_RELEASE="xenial"
-
 
 # ----------
 # Base Function(s)
@@ -96,6 +94,35 @@ blank_line() {
    fi
 }
 
+detect_os () {
+
+   if $(which lsb_release > /dev/null 2>&1) ; then
+
+      DIST="$(lsb_release -i | awk '{print tolower($3)}')"
+      DIST_VERSION="$(lsb_release -r | awk '{print tolower($2)}')"
+      DIST_CODENAME="$(lsb_release -c | awk '{print tolower($2)}')"
+
+      if [[ "$DIST" = "debian" ]]; then
+         if $(echo "$DIST_VERSION" | grep -q '\.') ; then
+            DIST_VERSION=$(echo "$DIST_VERSION" | cut --delimiter='.' -f1)
+         fi
+      fi
+
+   elif [[ -e "/etc/os-release" ]]; then
+
+      . /etc/os-release
+
+      DIST=$ID
+      DIST_VERSION=${VERSION_ID}
+
+   fi
+
+   # remove whitespace from DIST and DIST_VERSION
+   DIST="${DIST// /}"
+   DIST_VERSION="${DIST_VERSION// /}"
+
+}
+
 
 
 # ----------
@@ -139,18 +166,55 @@ if $terminal ; then
    echo -e "\033[1m----------\033[m"
 fi
 
+
+# ----------
+#  Read Configurations from $conf_file
+# ----------
+
+
+# - Give your default values here
+# -
+DEFAULT_FQDN_HOSTNAME="$(hostname -f)"
+
+if [[ -f "$conf_file" ]]; then
+   source "$conf_file"
+else
+   warn "No configuration file '$conf_file' present.\n
+             Loading default values.."
+fi
+
+[[ -n "$FQDN_HOSTNAME" ]] && DEFAULT_FQDN_HOSTNAME="$FQDN_HOSTNAME"
+
+
+blank_line
+echononl "Detect distribution/release of running OS.."
+detect_os > "$log_file" 2>&1
+if [[ $? -ne 0 ]]; then
+	echo_failed
+	error "$(cat "$log_file")"
+else
+	echo_ok
+fi
+
+
 FQDN_HOSTNAME=
 echo ""
 echo -e "\033[32m--\033[m"
 echo ""
 echo "Insert full qualified hostname for BigBlueButton Service"
 echo ""
-if [[ -n "$_FQDN_HOSTNAME" ]]; then
-   echononl "Full qualified hostname [${_FQDN_HOSTNAME}]: "
-   read FQDN_HOSTNAME
-   if [[ "X${FQDN_HOSTNAME}" = "X" ]]; then
-      FQDN_HOSTNAME=$_FQDN_HOSTNAME
-   fi
+if [[ -n "$DEFAULT_FQDN_HOSTNAME" ]]; then
+   while [[ "X${FQDN_HOSTNAME}" = "X" ]]; do
+      echononl "Full qualified hostname [${DEFAULT_FQDN_HOSTNAME}]: "
+      read FQDN_HOSTNAME
+      if [[ "X${FQDN_HOSTNAME}" = "X" ]]; then
+         FQDN_HOSTNAME=$DEFAULT_FQDN_HOSTNAME
+      fi
+      if [[ ! $FQDN_HOSTNAME =~ \. ]]; then
+         echo -e "\n\tGiven Host \033[33m\033[1m$FQDN_HOSTNAME\033[m seems not to be a full qualified hostname.\n"
+         FQDN_HOSTNAME=""
+      fi
+   done
 else
    while [[ "X${FQDN_HOSTNAME}" = "X" ]]; do
       echononl "Full qualified hostname: "
@@ -158,9 +222,12 @@ else
       if [[ "X${FQDN_HOSTNAME}" = "X" ]]; then
          echo -e "\n\t\033[33m\033[1mFull qualified hostname is reqired\033[m\n"
       fi
+      if [[ ! $FQDN_HOSTNAME =~ \. ]]; then
+         echo -e "\n\tGiven Host \033[33m\033[1m$FQDN_HOSTNAME\033[m seems not to be a full qualified hostname.\n"
+         FQDN_HOSTNAME=""
+      fi
    done
 fi
-
 HOSTNAME="${FQDN_HOSTNAME%%.*}"
 
 echo ""
@@ -170,6 +237,9 @@ echo ""
 echo -e "\tFull qualified Hostname..: $FQDN_HOSTNAME"
 echo -e "\tHostname.................: $HOSTNAME"
 echo ""
+echo -e "\tOS Distribution..........: $DIST"
+echo -e "\tDistribution's codename..: $DIST_CODENAME"
+echo ""
 echononl "einverstanden (yes/no): "
 read OK
 OK=${OK,,}
@@ -231,14 +301,14 @@ fi
 
 blank_line
 
-echononl "Create sources.list for '$DIST $DIST_RELEASE'.."
+echononl "Create sources.list for '$DIST $DIST_CODENAME'.."
 cat <<EOF > /etc/apt/sources.list 2> "$log_file"
-deb http://archive.ubuntu.com/ubuntu ${DIST_RELEASE} main restricted universe multiverse
-deb http://archive.ubuntu.com/ubuntu ${DIST_RELEASE}-updates main restricted universe multiverse
+deb http://archive.ubuntu.com/ubuntu ${DIST_CODENAME} main restricted universe multiverse
+deb http://archive.ubuntu.com/ubuntu ${DIST_CODENAME}-updates main restricted universe multiverse
 
-deb http://security.ubuntu.com/ubuntu ${DIST_RELEASE}-security main restricted universe multiverse
+deb http://security.ubuntu.com/ubuntu ${DIST_CODENAME}-security main restricted universe multiverse
 
-deb http://archive.ubuntu.com/ubuntu ${DIST_RELEASE}-backports main restricted universe multiverse
+deb http://archive.ubuntu.com/ubuntu ${DIST_CODENAME}-backports main restricted universe multiverse
 EOF
 if [[ $? -ne 0 ]]; then
 	echo_failed
@@ -380,7 +450,7 @@ fi
 
 echononl "Add repository for 'mongodb'.."
 cat <<EOF > /etc/apt/sources.list.d/mongodb-org-3.4.list 2> "$log_file"
-deb [ arch=amd64,arm64 ] http://repo.mongodb.org/apt/ubuntu ${DIST_RELEASE}/mongodb-org/3.4 multiverse
+deb [ arch=amd64,arm64 ] http://repo.mongodb.org/apt/ubuntu ${DIST_CODENAME}/mongodb-org/3.4 multiverse
 EOF
 if [[ $? -ne 0 ]]; then
 	echo_failed
@@ -447,7 +517,7 @@ fi
 #
 echononl "Add repository for BigBlueButton 2.2 packages.."
 cat <<EOF > /etc/apt/sources.list.d/bigbluebutton.list 2> "$log_file"
-deb https://ubuntu.bigbluebutton.org/${DIST_RELEASE}-220/ bigbluebutton-${DIST_RELEASE} main
+deb https://ubuntu.bigbluebutton.org/${DIST_CODENAME}-220/ bigbluebutton-${DIST_CODENAME} main
 EOF
 if [[ $? -ne 0 ]]; then
 	echo_failed