add bash-it

dot_bash_it/completion/available/gem.completion.bash

@@ -0,0 +1,35 @@
+# shellcheck shell=bash
+cite "about-completion"
+about-completion "gem completion"
+
+__gem_completion() {
+	local cur=${COMP_WORDS[COMP_CWORD]}
+	local prev=${COMP_WORDS[COMP_CWORD - 1]}
+	case $prev in
+		install)
+			# list the remote gems and add to completion
+			if [ -z "$REMOTE_GEMS" ]; then
+				read -r -a REMOTE_GEMS <<< "$(gem list --remote --no-versions | sed 's/\*\*\* REMOTE GEMS \*\*\*//' | tr '\n' ' ')"
+			fi
+
+			local cur=${COMP_WORDS[COMP_CWORD]}
+			# shellcheck disable=SC2207
+			COMPREPLY=($(compgen -W "${REMOTE_GEMS[*]}" -- "$cur"))
+			return 0
+			;;
+		uninstall)
+			# list all local installed gems and add to completion
+			read -r -a LOCAL_GEMS <<< "$(gem list --no-versions | sed 's/\*\*\* LOCAL GEMS \*\*\*//' | tr '\n' ' ')"
+
+			local cur=${COMP_WORDS[COMP_CWORD]}
+			# shellcheck disable=SC2207
+			COMPREPLY=($(compgen -W "${LOCAL_GEMS[*]}" -- "$cur"))
+			return 0
+			;;
+	esac
+	local commands=(build cert check cleanup contents dependency environment fetch generate_index help install list lock outdated owner pristine push query rdoc search server sources specification stale uninstall unpack update which)
+	# shellcheck disable=SC2207
+	COMPREPLY=($(compgen -W "${commands[*]}" -- "$cur"))
+}
+
+complete -F __gem_completion gem