From 1579534c2e3dda36d0037661f3aeb8af05bd3da5 Mon Sep 17 00:00:00 2001
From: Graham McGregor <graham@gmcgregor.ca>
Date: Thu, 1 Dec 2016 22:55:12 -0500
Subject: [PATCH] Prevent clean_plugins from deleting root

If tmux was not yet configured to initialize the Tmux Plugin Manager,
the variable for the plugin home was not being set. This was resulting
in a `rm -rf /` which is pretty nuclear.

Fixes: https://github.com/tmux-plugins/tpm/issues/58
---
 scripts/helpers/plugin_functions.sh | 13 +++++++++++++
 scripts/update_plugin.sh            |  1 +
 2 files changed, 14 insertions(+)

diff --git a/scripts/helpers/plugin_functions.sh b/scripts/helpers/plugin_functions.sh
index b1dfb3d..d2778d5 100644
--- a/scripts/helpers/plugin_functions.sh
+++ b/scripts/helpers/plugin_functions.sh
@@ -31,9 +31,22 @@ _sourced_files() {
 		awk '/^[ \t]*source(-file)? +/ { gsub(/'\''/,""); gsub(/'\"'/,""); print $2 }'
 }
 
+# Want to be able to abort in certain cases
+trap "exit 1" TERM
+export TOP_PID=$$
+
+_fatal_error_abort() {
+	echo >&2 "Aborting."
+	kill -s TERM $TOP_PID
+}
+
 # PUBLIC FUNCTIONS BELOW
 
 tpm_path() {
+	if [ "$_CACHED_TPM_PATH" == "/" ]; then
+		echo >&2 "FATAL: Tmux Plugin Manager not configured in tmux.conf"
+		_fatal_error_abort
+	fi
 	echo "$_CACHED_TPM_PATH"
 }
 
diff --git a/scripts/update_plugin.sh b/scripts/update_plugin.sh
index 4fc44d2..7d856ee 100755
--- a/scripts/update_plugin.sh
+++ b/scripts/update_plugin.sh
@@ -60,6 +60,7 @@ update_plugins() {
 }
 
 main() {
+	ensure_tpm_path_exists
 	if [ "$1" == "all" ]; then
 		update_all
 	else