Fixed a small bug in the update notification script and how it was launched.

scripts/i38-update-check.sh

@@ -21,6 +21,8 @@ i3Dir="$(dirname -- "$scriptDir")"
 versionFile="${I38_VERSION_FILE:-${i3Dir}/i38-version}"
 stateDir="${XDG_STATE_HOME:-${HOME}/.local/state}/I38"
 notifyState="${stateDir}/update-check-notified"
+runtimeDir="${XDG_RUNTIME_DIR:-/tmp}"
+lockDir="${runtimeDir}/i38-update-check"
 
 valid_commit() {
     [[ "${1:-}" =~ ^[0-9a-fA-F]{40}$ ]]
@@ -84,10 +86,32 @@ send_update_notification() {
     remember_notification "$remoteCommit"
 }
 
+stop_update_check() {
+    rm -rf "$lockDir"
+    exit 0
+}
+
 if ! command -v git > /dev/null || ! command -v notify-send > /dev/null; then
     exit 0
 fi
 
+if [[ -d "$lockDir" ]]; then
+    if [[ -f "${lockDir}/pid" ]]; then
+        IFS= read -r existingPid < "${lockDir}/pid" || existingPid=""
+        if [[ "$existingPid" =~ ^[0-9]+$ ]] && kill -0 "$existingPid" 2> /dev/null; then
+            exit 0
+        fi
+    fi
+    rm -rf "$lockDir"
+fi
+
+if ! mkdir "$lockDir" 2> /dev/null; then
+    exit 0
+fi
+printf '%s\n' "$$" > "${lockDir}/pid"
+trap 'rm -rf "$lockDir"' EXIT
+trap stop_update_check INT TERM
+
 sleep "$initialDelay"
 
 while :; do