TT#28952 Change scripts to use 'small' GRML

In 'small' GRML utils nmap, curl, ifdata are missing so replace them
with another ones and install required packages for installcd in
one place.

Change-Id: I7269bb53b66805c792f5e91ff97a2fd2ebd14d1f
(cherry picked from commit d15f0387a3)

templates/scripts/includes/check-for-network

@@ -15,13 +15,10 @@ EXIT_CODE=1
 
 GW="$(route -n | awk '/^0\.0\.0\.0/{print $2}')"
 GWDEV="$(route -n | awk '/^0\.0\.0\.0/{print $NF}')"
-NMAP="$(nmap -sP --host_timeout 4000 --max_rtt_timeout 4000ms "$GW" 2>/dev/null)"
 
-if [ $? -eq 0 ]; then
-  if ! echo "$NMAP" | grep -q "0 hosts up" ; then
-    STATUS="Online (${GWDEV})"
-    EXIT_CODE=0
-  fi
+if ping -c 3 "${GW}" >/dev/null ; then
+  STATUS="Online (${GWDEV})"
+  EXIT_CODE=0
 fi
 
 printf "%s\n" "$STATUS"

templates/scripts/includes/check_installing_version.sh

@@ -37,13 +37,11 @@ if checkBootParam ngcppro ; then
   if checkBootParam "sipwiserepo=" ; then
     SIPWISE_REPO_HOST=$(getBootParam sipwiserepo)
   fi
+
   URL="${SIPWISE_REPO_TRANSPORT}://${SIPWISE_REPO_HOST}/sppro/"
-  accessible=$( curl -s -o /dev/null -w "%{http_code}" "${URL}" 2>/dev/null || true )
   err_message="You are installing Pro/Carrier version but ${SIPWISE_REPO_TRANSPORT}://${SIPWISE_REPO_HOST}/sppro/ repository not accessible. Please contact support@sipwise.com"
-  while [[ "${accessible}" != 200 ]]; do
-    if dialog --yes-label Retry --no-label Exit --yesno "${err_message}" 0 0 ; then
-      accessible=$( curl -s -o /dev/null -w "%{http_code}" "${URL}" 2>/dev/null || true )
-    else
+  while ! wget -q -T 10 -O /dev/null "${URL}" ; do
+    if ! dialog --yes-label Retry --no-label Exit --yesno "${err_message}" 0 0 ; then
       exit 1
     fi
   done

templates/scripts/includes/install_required_packages.sh

@@ -0,0 +1,9 @@
+#!/bin/bash
+
+set -e
+
+echo "Updating list of packages..."
+apt-get update 1>/dev/null
+echo "Installing required packages..."
+apt-get install --assume-yes \
+  isomd5sum

templates/scripts/includes/verify_iso_image.sh

@@ -4,8 +4,6 @@ set -e
 
 message="Do you want to check the install media?"
 if dialog --yes-label Yes --no-label Skip --yesno "${message}" 0 0 ; then
-  sudo apt-get update 1>/dev/null || true
-  sudo apt-get install isomd5sum --assume-yes 1>/dev/null || true
   if ! result="$( { checkisomd5 /dev/sr0 1>/dev/null; } 2>&1 )" ; then
     err_message="Integrity check failed. Reason: ${result}. Abort installation or continue anyway?"
     if dialog --yes-label Exit --no-label Continue --yesno "${err_message}" 0 0 ; then

templates/scripts/main.sh

@@ -145,6 +145,7 @@ deploy() {
 install_sipwise_keyring
 "${scripts_dir}/network_configuration.sh"
 "${scripts_dir}/check_installing_version.sh"
+"${scripts_dir}/install_required_packages.sh"
 "${scripts_dir}/verify_iso_image.sh"
 prompt_for_target
 check_for_existing_pvs