Convert new-domain to a shell script

The Python script was swallowing the input and output and causing it to
stall, so instead of learning more Python to make it work, I opted to
hack together a shell script that accomplished the same task.

new-domain

@@ -1,22 +1,16 @@
-#!/usr/bin/env python3
+#!/usr/bin/env sh
 
-from os.path import exists
-from subprocess import run, PIPE
-import sys
+INI_FILE="/root/digitalocean.ini"
 
-ini_file = '/root/digitalocean.ini'
-if not exists(ini_file):
-    print("ERROR: digitalocean credentials not present at " + ini_file)
+if [ ! -f $INI_FILE ]; then
+    echo "ERROR: digitalocean credentials not present at $INI_FILE"
+    exit 1
+fi
 
-cmd = ['certbot', 'certonly',
-        '--dns-digitalocean',
-        '--dns-digitalocean-credentials',
-        ini_file,
-        '--dns-digitalocean-propagation-seconds',
-        '90',
-        ]
+CMD="certbot certonly --dns-digitalocean --dns-digitalocean-credentials $INI_FILE --dns-digitalocean-propagation-seconds 90"
 
-for domain in sys.argv[1:]:
-    cmd.extend(['-d', domain])
+for domain in "$@"; do
+    CMD="$CMD -d $domain"
+done
 
-print(run(cmd, stdout=PIPE, stderr=PIPE).stdout.decode('utf=8'))
+eval $CMD