split out the lib

cascading-pr.sh

@@ -0,0 +1,66 @@
+#!/bin/bash
+# SPDX-License-Identifier: MIT
+
+SELF_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+source $SELF_DIR/cascading-pr-lib.sh
+
+function run() {
+    options[origin_host_port]=$(host_port ${options[origin_url]})
+    options[destination_host_port]=$(host_port ${options[destination_url]})
+				
+    # login destination
+    # open a PR on destination
+    # checkout the head of the PR
+    # update the PR
+    # force-push the head
+    # wait on the status of the tip of the head
+}
+
+function main() {
+    while true; do
+	case "$1" in
+	    --verbose)
+		shift
+		verbose
+		;;
+	    --debug)
+		shift
+		debug
+		;;
+	    --origin-url)
+		shift
+		options[origin_url]=$1
+		;;
+	    --origin-repo)
+		shift
+		options[origin_repo]=$1
+		;;
+	    --origin-token)
+		shift
+		options[origin_token]=$1
+		;;
+	    --destination-url)
+		shift
+		options[destination_url]=$1
+		;;
+	    --destination-repo)
+		shift
+		options[destination_repo]=$1
+		;;
+	    --destination-token)
+		shift
+		options[destination_token]=$1
+		;;
+	    --update)
+		shift
+		options[update]=$1
+		;;
+	    *)
+		"${1:-run}"
+		return 0
+		;;
+	esac
+    done
+}
+
+${MAIN:-main} "${@}"