feat: add version subcommand and bump command

bump.sh

@@ -0,0 +1,40 @@
+#!/bin/sh
+set -e
+set -u
+
+my_version="${1-}"
+if [ -z "${my_version}" ]; then
+    echo "Usage: bump.sh v1.2.3"
+    exit 1
+fi
+
+if ! git diff --quiet; then
+    echo "Error: git status is dirty"
+fi
+
+if ! command -v sd > /dev/null; then
+    echo "Install 'sd' first."
+    echo "    curl https://webi.sh/sd | sh"
+    exit 1
+fi
+
+my_commit_hash="$(
+    git rev-parse --short HEAD
+)"
+my_commit_date="$(
+    git show -s --format=%ci "${my_commit_hash}" |
+        grep -E '20[0-9]{2}-[01][0-9]-[0123][0-9]'
+)"
+my_year="$(
+    date '+%Y'
+)"
+
+sd 'my_version=.*' "my_version='${my_version}'" duckdns.sh
+sd 'my_year=.*' "my_year='${my_year}'" duckdns.sh
+sd 'my_date=.*' "my_date='${my_commit_date}'" duckdns.sh
+
+git add ./duckdns.sh
+git commit -m "chore(release): bump to ${my_version}"
+git tag "${my_version}"
+
+git describe --tags

duckdns.sh

@@ -201,6 +201,15 @@ cmd_update() { (
     fn_update_ips
 ); }
 
+cmd_version() { (
+    my_year='0000'
+    my_version='v0.0.0'
+    my_date='0000-00-00'
+
+    echo "DuckDNS.sh ${my_version} (${my_date})"
+    echo "Copyright ${my_year} AJ ONeal"
+); }
+
 fn_check_env() { (
     if ! [ -e ~/.config/duckdns.sh/"${DUCKDNS_SH_SUBDOMAIN}.env" ]; then
         exit 1
@@ -447,6 +456,7 @@ main() { (
         update) cmd_update ;;
         __noop__) ;;
         help | --help | -h) fn_help ;;
+        version | --version | -V) cmd_version ;;
         *)
             fn_help
             exit 1
@@ -473,6 +483,7 @@ fn_help() { (
     echo "    disable <subdomain>          - disable on boot or login"
     echo ""
     echo "    help                         - show this menu"
+    echo "    version                      - show version and exit"
     echo ""
 ); }