From 216702239d95e87893a469081d9379ad30a003e9 Mon Sep 17 00:00:00 2001
From: Alexandre CATTEAU <alexandre.catteau@gmail.com>
Date: Sat, 3 Jun 2023 12:54:27 +0200
Subject: [PATCH] Add Systemd path as trigger for service

---
 README.md                            | 4 ++--
 install.sh                           | 5 +++--
 systemd-templates/set-ip-routes.path | 6 ++++++
 3 files changed, 11 insertions(+), 4 deletions(-)
 create mode 100644 systemd-templates/set-ip-routes.path

diff --git a/README.md b/README.md
index 941ae09..b1581d4 100644
--- a/README.md
+++ b/README.md
@@ -13,7 +13,7 @@ https://wiki.libreelec.tv/configuration/wireguard for reference)
 * `systemd-templates/` contains Systemd units templates for detecting VPN connection, and apply routes and DNS
   modifications.
 #### Installation
-* `install.sh` script copies Systemd templates to their destination, and enables trigger.
+* `install.sh` script copies Systemd templates to their destination, and enables trigger (Systemd path).
 
 ### TODO
-* Define a trigger
+* RAS
diff --git a/install.sh b/install.sh
index 7fdf8d0..7f0286b 100644
--- a/install.sh
+++ b/install.sh
@@ -13,11 +13,12 @@ echo "Copying Systemd units to system directory..."
 $sudo cp $run_directory/systemd-templates/set-ip-routes.service /etc/systemd/system/
 $sudo sed -i -e "s/PH_DNS/$dns_server/g" /etc/systemd/system/set-ip-routes.service
 $sudo sed -i -e "s:PH_NETWORK:$target_network:g" /etc/systemd/system/set-ip-routes.service
+$sudo cp $run_directory/systemd-templates/set-ip-routes.path /etc/systemd/system/
 
 echo "Reloading Systemd..."
 $sudo systemctl daemon-reload
-echo "Enabling timer (not starting it, either do it manually or reboot)..." # TODO replace by new trigger
-$sudo systemctl enable conf-sync.timer
+echo "Enabling path unit (not starting it, either do it manually or reboot)..."
+$sudo systemctl enable set-ip-routes.path
 
 echo "Finished install. Exiting..."
 exit 0
diff --git a/systemd-templates/set-ip-routes.path b/systemd-templates/set-ip-routes.path
new file mode 100644
index 0000000..c239118
--- /dev/null
+++ b/systemd-templates/set-ip-routes.path
@@ -0,0 +1,6 @@
+[Unit]
+Description=Detect WireGuard VPN activation
+
+[Path]
+PathExists=/sys/class/net/wg0
+Unit=set-ip-routes.service