feat(zbm): Add networking/IP addressing setup to ZBM (#6)

setup.sh

@@ -770,6 +770,45 @@ function customize_dropbear_hooks () {
     fi
 }
 
+function ensure_ip_in_kcl () {
+    local zbm_config kcl_length kcl_string default_ip ip_addr_found new_kcl first_kcl_elem
+    local -a kcl
+    paru_install 'go-yq'
+
+    zbm_config='/etc/zfsbootmenu/config.yaml'
+    kcl_length="$(yq '.Kernel.CommandLine | length' "${zbm_config}")"
+    if [[ "${kcl_length}" -eq '0' ]]; then
+        >&3 printf -- '%s\n' \
+            'No .Kernel.CommandLine YAML element with content found in '"${zbm_config}"'. Exiting ...'
+        exit 77
+    else
+        kcl_string="$(yq '.Kernel.CommandLine' "${zbm_config}")"
+    fi
+
+    default_ip='ip='"${ARCHZBM_NET_CLIENT_IP}"':'"${ARCHZBM_NET_SERVER_IP}"':'"${ARCHZBM_NET_GATEWAY_IP}"':'"${ARCHZBM_NET_NETMASK}"':'"${ARCHZBM_NET_HOSTNAME}"':'"${ARCHZBM_NET_DEVICE}"':'"${ARCHZBM_NET_AUTOCONF}"
+    mapfile -t kcl < <(<<<"${kcl_string}" tr ' ' '\n' | sed '/^$/d')
+    for kcl_elem in "${!kcl[@]}"; do
+        if grep -Piq -- 'ip=' <<<"${kcl[$kcl_elem]}"; then
+            ip_addr_found='true'
+            kcl["${kcl_elem}"]="${default_ip}"
+        fi
+    done
+    if [[ ! "${ip_addr_found}" ]]; then
+        kcl+=("${default_ip}")
+    fi
+    new_kcl=''
+    first_kcl_elem='true'
+    for kcl_elem in "${kcl[@]}"; do
+        if [[ ! "${first_kcl_elem}" ]]; then
+            new_kcl+=' '"${kcl_elem}"
+        else
+            new_kcl+="${kcl_elem}"
+            unset -v first_kcl_elem
+        fi
+    done
+    yq -i '.Kernel.CommandLine = "'"${new_kcl}"'"' "${zbm_config}"
+}
+
 function we_want_ssh () {
     #2.10
     if  [[ "${ARCHZBM_NET_CLIENT_IP}" ]]       || \