Resolve "Testing on later versions of Ubuntu"

scripts/subinstallers/docker.sh

@@ -6,7 +6,18 @@ figlet "Mistborn: Installing Docker"
 sudo apt update
 sudo -E apt install -y python python3-pip python3-setuptools libffi-dev python3-dev libssl-dev
 
-if [ "$DISTRO" == "ubuntu" ] && [ "$VERSION_ID" == "20.04" ]; then
+# Ubuntu version >= 20.04
+
+set +e
+vercomp "$VERSION_ID" "19.10"
+case $? in
+    0) op='=';;
+    1) op='>';;
+    2) op='<';;
+esac
+set -e
+
+if [ "$DISTRO" == "ubuntu" ] && [ "$op" == ">" ]; then
     echo "Automated Docker install"
     sudo -E apt-get install -y docker-compose
 else

scripts/subinstallers/docker_raspbian.sh

@@ -42,3 +42,5 @@ if [ $? -eq 0 ]; then
     sudo dpkg -i libseccomp2_2.5.1-1_$(dpkg --print-architecture).deb
     popd
 fi
+
+set -e

scripts/subinstallers/platform.sh

@@ -15,3 +15,39 @@ fi
 figlet "UNAME: $UNAME"
 figlet "DISTRO: $DISTRO"
 figlet "VERSION: $VERSION_ID"
+
+
+vercomp () {
+    # case $? in
+    #     0) op='=';;
+    #     1) op='>';;
+    #     2) op='<';;
+    if [[ $1 == $2 ]]
+    then
+        return 0
+    fi
+    local IFS=.
+    local i ver1=($1) ver2=($2)
+    # fill empty fields in ver1 with zeros
+    for ((i=${#ver1[@]}; i<${#ver2[@]}; i++))
+    do
+        ver1[i]=0
+    done
+    for ((i=0; i<${#ver1[@]}; i++))
+    do
+        if [[ -z ${ver2[i]} ]]
+        then
+            # fill empty fields in ver2 with zeros
+            ver2[i]=0
+        fi
+        if ((10#${ver1[i]} > 10#${ver2[i]}))
+        then
+            return 1
+        fi
+        if ((10#${ver1[i]} < 10#${ver2[i]}))
+        then
+            return 2
+        fi
+    done
+    return 0
+}