Dynamically extract python_ver & postgresql_version

scripts/local_facts.fact

@@ -11,7 +11,9 @@
 
 STAGE=0
 OS="none"
-VERSION_ID="none"    # This var's combined with the above, before being output
+VERSION_ID="none"    # Temp var, for: OS_VER="$OS-$VERSION_ID"
+OS_VER="none"
+PYTHON_VER="none"
 IIAB_REMOTE_URL="none"
 IIAB_BRANCH="none"
 IIAB_COMMIT="none"
@@ -63,6 +65,7 @@ OS_VER="$OS-$VERSION_ID"
     #"ubuntu-17"    | \
     #"ubuntu-18"    | \
     #"ubuntu-19"    | \
+    #"ubuntu-2004"  | \
     #"ubuntu-2104"  | \
     #"ubuntu-2110"  | \
     #"centos-7"     | \
@@ -76,7 +79,6 @@ OS_VER="$OS-$VERSION_ID"
 case $OS_VER in
     "debian-11"    | \
     "debian-12"    | \
-    "ubuntu-2004"  | \
     "ubuntu-2204"  | \
     "ubuntu-2210"  | \
     "ubuntu-2304"  | \
@@ -123,6 +125,13 @@ tmp=$(ansible --version) &&
     #ANSIBLE_VERSION=$(echo "$tmp" | head -1 | awk '{print $2}')
     #ANSIBLE_VERSION=$(echo "$tmp" | head -1 | sed -e 's/.* //')
 
+if tmp=$(python3 -c 'from sys import version_info; print("%s.%s" % (version_info.major, version_info.minor));'); then
+    PYTHON_VER=$tmp
+else
+    echo -e "\e[1m\nPython 3 is REQUIRED for Internet-in-a-Box.  You might want to run:\n\nsudo apt install python3\n\e[0m"
+    exit 1
+fi
+
 
 # THE LAST 3 BELOW ARE DIFFERENT as "systemctl is-enabled" unhelpfully returns
 # the same error code (i.e. 1) REGARDLESS whether the service is (A) disabled
@@ -159,5 +168,6 @@ cat <<EOF
 "devicetree_model"        : "$DEVICETREE_MODEL",
 "ansible_version"         : "$ANSIBLE_VERSION",
 "os"                      : "$OS",
-"os_ver"                  : "$OS_VER"}
+"os_ver"                  : "$OS_VER",
+"python_ver"              : "$PYTHON_VER"}
 EOF