From 95802c5d373f0a7148a6a13289cacdc9a669034a Mon Sep 17 00:00:00 2001
From: nevaforget <dom@moonarch.de>
Date: Fri, 27 Mar 2026 23:41:08 +0100
Subject: [PATCH] feat: Waybar-Wrapper mit File-Locking und Cache
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Waybar startet pro Monitor eine eigene corsairctl-Instanz.
Mehrere Prozesse auf demselben HID-Gerät verursachen Response-Mixups.
Der Wrapper cached den JSON-Output für 10s und nutzt flock
damit nur ein Prozess gleichzeitig das Gerät anspricht.
---
 PKGBUILD                     |  1 +
 scripts/corsairctl-waybar.sh | 23 +++++++++++++++++++++++
 2 files changed, 24 insertions(+)
 create mode 100755 scripts/corsairctl-waybar.sh

diff --git a/PKGBUILD b/PKGBUILD
index 8f10397..02ba722 100644
--- a/PKGBUILD
+++ b/PKGBUILD
@@ -27,5 +27,6 @@ build() {
 package() {
     cd "$pkgname"
     install -Dm755 "target/release/$pkgname" "$pkgdir/usr/bin/$pkgname"
+    install -Dm755 "scripts/corsairctl-waybar.sh" "$pkgdir/usr/bin/corsairctl-waybar"
     install -Dm644 "udev/99-corsair.rules" "$pkgdir/usr/lib/udev/rules.d/99-corsair.rules"
 }
diff --git a/scripts/corsairctl-waybar.sh b/scripts/corsairctl-waybar.sh
new file mode 100755
index 0000000..6922bbd
--- /dev/null
+++ b/scripts/corsairctl-waybar.sh
@@ -0,0 +1,23 @@
+#!/bin/bash
+# ABOUTME: Waybar-Wrapper für corsairctl — cached JSON-Output.
+# ABOUTME: Verhindert dass mehrere Waybar-Bars gleichzeitig das HID-Gerät ansprechen.
+
+CACHE="/tmp/corsairctl-waybar.json"
+LOCK="/tmp/corsairctl-waybar.lock"
+MAX_AGE=10
+
+# Cache frisch genug?
+if [[ -f "$CACHE" ]]; then
+    age=$(( $(date +%s) - $(stat -c %Y "$CACHE") ))
+    if (( age < MAX_AGE )); then
+        cat "$CACHE"
+        exit 0
+    fi
+fi
+
+# Lock holen und aktualisieren
+(
+    flock -n 9 || { [[ -f "$CACHE" ]] && cat "$CACHE"; exit 0; }
+    corsairctl json > "$CACHE" 2>/dev/null
+    cat "$CACHE"
+) 9>"$LOCK"