new file mode 100755

@@ -0,0 +1,87 @@

+#!/bin/sh

+set -euC

+

+# nfsn-dns-update DOMAIN NAME TYPE FILTER_REGEX [DATA]...

+

+# nfsn-dns-update "example.com" "git" "A" '' \

+#     "$(curl -s "https://api.ipify.org")"

+

+# Arguments.

+

+domain="$1" ; shift

+name="$1" ; shift

+type="$1" ; shift

+filter_regex="$1" ; shift

+

+host="${name:+"$name."}$domain"

+

+data_new_list=""

+while [ "$#" -gt "0" ]

+do

+    data="$1" ; shift

+    data_new_list="$(

+        printf "%s${data_new_list:+"\n"}%s\n" \

+            "${data_new_list:-}" \

+            "$data"

+    )"

+done

+

+# Old data.

+

+data_old_response="$(

+    nfsn-send "POST" "/dns/$domain/listRRs" \

+        "name" "$name" \

+        "type" "$type"

+)"

+data_old_list="$(

+    printf "%s\n" "$data_old_response" \

+    | jq -r '

+        .[] |

+        if ."aux"

+        then

+            "\(."aux") "

+        else

+            ""

+        end

+        +

+        "\(."data"?)"

+    ' \

+    | grep "$filter_regex" \

+    || true

+)"

+

+# Update.

+

+if [ -n "$data_old_list" ]

+then

+    printf "%s\n" "$data_old_list" \

+    | while IFS= read -r data

+    do

+        if ! printf "%s\n" "$data_new_list" | grep -qFx "$data"

+        then

+            printf "Removing data: %s\n" "$data"

+            nfsn-send "POST" "/dns/$domain/removeRR" \

+                "name" "$name" \

+                "type" "$type" \

+                "data" "$data"

+        fi

+    done

+fi

+

+if [ -n "$data_new_list" ]

+then

+    printf "%s\n" "$data_new_list" \

+    | while IFS= read -r data

+    do

+        if ! printf "%s\n" "$data_old_list" | grep -qFx "$data"

+        then

+            printf "Adding data: %s\n" "$data"

+            nfsn-send "POST" "/dns/$domain/addRR" \

+                "name" "$name" \

+                "type" "$type" \

+                "data" "$data"

+        else

+            printf "Data already present: %s\n" "$data"

+        fi

+    done

+fi