feat: add shell completion

completions/dotty.sh

@@ -0,0 +1,41 @@
+# shellcheck shell=bash
+
+# based on https://tylerthrailkill.com/2019-01-19/writing-bash-completion-script-with-subcommands/
+_dotty() {
+	local i=1 cmd
+
+	# iterate over COMP_WORDS (ending at currently completed word)
+	# this ensures we bm_get command completion even after passing flags
+	while [[ "$i" -lt "$COMP_CWORD" ]]; do
+		local s="${COMP_WORDS[i]}"
+		case "$s" in
+		# if our current word starts with a '-', it is not a subcommand
+		-*) ;;
+		# we are completing a subcommand, set cmd
+		*)
+			cmd="$s"
+			break
+			;;
+		esac
+		(( i++ ))
+	done
+
+	# check if we're completing 'dotty'
+	if [[ "$i" -eq "$COMP_CWORD" ]]; then
+		local cur="${COMP_WORDS[COMP_CWORD]}"
+		# shellcheck disable=SC2207
+		COMPREPLY=($(compgen -W "status reconcile --version --help" -- "$cur"))
+		return
+	fi
+
+	# if we're not completing 'dotty', then we're completing a subcommand
+	case "$cmd" in
+		status)
+			COMPREPLY=() ;;
+		reconcile)
+			COMPREPLY=() ;;
+		*)
+			;;
+	esac
+
+} && complete -F _dotty dotty