Add a deployment method that executes an external script

deploy/script.sh

@@ -0,0 +1,50 @@
+#!/usr/bin/env sh
+
+# Script to deploy certificates to by executing a script
+#
+# The script is called with 5 arguments, in the following order:
+# - Domain
+# - Private key file path
+# - Certificate file path
+# - CA certificate file path
+# - Full chain certificate file path
+#
+# Only a single environment variable needs to be set - the path
+# to the script itself:
+# export DEPLOY_SCRIPT_PATH="/path/to/script.py"
+
+########  Public functions #####################
+
+#domain keyfile certfile cafile fullchain
+script_deploy() {
+  _cdomain="$1"
+  _ckey="$2"
+  _ccert="$3"
+  _cca="$4"
+  _cfullchain="$5"
+
+  if [ -f "$DOMAIN_CONF" ]; then
+    # shellcheck disable=SC1090
+    . "$DOMAIN_CONF"
+  fi
+
+  _debug _cdomain "$_cdomain"
+  _debug _ckey "$_ckey"
+  _debug _ccert "$_ccert"
+  _debug _cca "$_cca"
+  _debug _cfullchain "$_cfullchain"
+
+  # SCRIPT_PATH is required.
+  if [ -z "$DEPLOY_SCRIPT_PATH" ]; then
+    if [ -z "$Le_Deploy_script_path" ]; then
+      _err "DEPLOY_SCRIPT_PATH not defined."
+      return 1
+    fi
+  else
+    Le_Deploy_script_path="$DEPLOY_SCRIPT_PATH"
+    _savedomainconf Le_Deploy_script_path "$Le_Deploy_script_path"
+  fi
+
+  _deploy_script_path=$Le_Deploy_script_path
+  $_deploy_script_path "$@"
+}