added working version of scripts

update_digitalocean_dns_a_record.bash

@@ -0,0 +1,30 @@
+#! /bin/bash  
+
+# set an A record but first check to make sure we didn't just do this.
+
+DIGITALOCEAN_DOMAIN=$1
+IP=$2
+
+SCRIPT="${BASH_SOURCE[0]}"
+SCRIPT_DIR=${SCRIPT%/*}
+SCRIPT_NAME=${SCRIPT##*/}
+
+REPEAT_CHECK_DIR=$HOME/repeat_check
+REPEAT_CHECK=$REPEAT_CHECK_DIR/$SCRIPT_NAME # file to save argument in if successful
+
+# exit if previous successful call was with same argument
+if [[ -e $REPEAT_CHECK ]]; then
+    PREVIOUS_ARGUMENTS=`cat $REPEAT_CHECK`
+    if [[ "$*" ==  "$PREVIOUS_ARGUMENTS" ]]; then
+        echo previous call to $SCRIPT was also with arguments: \"$*\"  so exiting now to avoid duplicate work.
+        exit
+    fi
+fi
+
+if $SCRIPT_DIR/set_digitalocean_dns_a_record.bash $@; then
+    # if successful then save arguments.
+    echo call to $SCRIPT worked so saving arguments \"$*\" in $REPEAT_CHECK
+    mkdir -p $REPEAT_CHECK_DIR
+    echo "$*" > $REPEAT_CHECK
+fi
+