add bundle style plugin definition

scripts/shared_functions.sh

@@ -12,7 +12,15 @@ shared_set_tpm_path_constant() {
 }
 
 shared_get_tpm_plugins_list() {
-	tmux show-option -gqv "$tpm_plugins_variable_name"
+	local plugins_list
+	plugins_list="$(tmux show-option -gqv "$tpm_plugins_variable_name")"
+	if [ -z "${plugins_list}" ]; then
+		#read set @plugin "tmux-plugins/tmux-example-plugin" entries
+		cat /etc/tmux.conf ~/.tmux.conf 2>/dev/null |
+			awk '/^set +@plugin/ { gsub(/'\''/,""); gsub(/'\"'/,""); print $3 }'
+	else
+		printf "%s\\n" "${plugins_list}"
+	fi
 }
 
 # Allowed plugin name formats:

tests/test_plugin_bundle_installation.sh

@@ -0,0 +1,28 @@
+#!/usr/bin/env bash
+
+CURRENT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+
+source $CURRENT_DIR/helpers.sh
+
+test_plugin_installation() {
+	set_tmux_conf_helper <<- HERE
+	set @plugin "tmux-plugins/tmux-example-plugin"
+	run-shell "$PWD/tpm"
+	HERE
+
+	# opens tmux and test it with `expect`
+	"$CURRENT_DIR"/expect_successful_plugin_download ||
+		fail_helper "Tmux plugin installation fails"
+
+	# check plugin dir exists after download
+	check_dir_exists_helper "$HOME/.tmux/plugins/tmux-example-plugin/" ||
+		fail_helper "Plugin download fails"
+
+	teardown_helper
+}
+
+main() {
+	test_plugin_installation
+	exit_value_helper
+}
+main