From ce029c341939b88a91ec167ef1968bba2876158c Mon Sep 17 00:00:00 2001
From: Kaosu <kaosuran@protonmail.com>
Date: Sat, 27 Dec 2025 08:16:03 +0100
Subject: [PATCH 1/2] temperature: add hwmon-name option for stable sensor
 selection

Allow selecting a hwmon device for the temperature module by its
name instead of a fixed hwmon path.

This avoids fragile configurations that break when new hwmon
devices are added and the kernel changes hwmon ordering.

The hwmon-name option is mutually exclusive with hwmon-path and
hwmon-path-abs to prevent ambiguous configurations.
---
 man/waybar-temperature.5.scd |  6 ++++++
 src/modules/temperature.cpp  | 32 ++++++++++++++++++++++++++++++++
 2 files changed, 38 insertions(+)

diff --git a/man/waybar-temperature.5.scd b/man/waybar-temperature.5.scd
index 1e19ec82..672a2518 100644
--- a/man/waybar-temperature.5.scd
+++ b/man/waybar-temperature.5.scd
@@ -27,6 +27,12 @@ Addressed by *temperature*
 	The path of the hwmon-directory of the device, e.g. */sys/devices/pci0000:00/0000:00:18.3/hwmon*. (Note that the subdirectory *hwmon/hwmon#*, where *#* is a number is not part of the path!) Has to be used together with *input-filename*.
 	This can also be an array of strings, for which, it just works like *hwmon-path*.
 
+*hwmon-name*: ++
+	typeof: string ++
+	Select a hwmon device by its name (from /sys/class/hwmon/*/name), e.g. *amdgpu*
+	Requires *input-filename* to be set.
+	Cannot be used together with *hwmon-path* or *hwmon-path-abs*.
+
 *input-filename*: ++
 	typeof: string ++
 	The temperature filename of your *hwmon-path-abs*, e.g. *temp1_input*
diff --git a/src/modules/temperature.cpp b/src/modules/temperature.cpp
index fa23ef56..d8108577 100644
--- a/src/modules/temperature.cpp
+++ b/src/modules/temperature.cpp
@@ -20,6 +20,24 @@ waybar::modules::Temperature::Temperature(const std::string& id, const Json::Val
         if (check_set_path(item.asString())) break;
   };
 
+  auto find_hwmon_by_name = [](const std::string& name) -> std::optional<std::filesystem::path> {
+    for (const auto& entry : std::filesystem::directory_iterator("/sys/class/hwmon")) {
+      std::ifstream f(entry.path() / "name");
+      std::string hwname;
+      if (f >> hwname && hwname == name) {
+        return entry.path();
+      }
+    }
+    return std::nullopt;
+  };
+
+  // ensure either hwmon-name OR old paths are used, not both
+  if (config_["hwmon-name"].isString() &&
+      (!config_["hwmon-path"].isNull() || !config_["hwmon-path-abs"].isNull())) {
+    throw std::runtime_error(
+        "hwmon-name cannot be used together with hwmon-path or hwmon-path-abs");
+  }
+
   // if hwmon_path is an array, loop to find first valid item
   traverseAsArray(config_["hwmon-path"], [this](const std::string& path) {
     if (!std::filesystem::exists(path)) return false;
@@ -40,6 +58,20 @@ waybar::modules::Temperature::Temperature(const std::string& id, const Json::Val
     });
   }
 
+  if (file_path_.empty() && config_["hwmon-name"].isString()) {
+    if (!config_["input-filename"].isString()) {
+      throw std::runtime_error("hwmon-name requires input-filename to be set");
+    }
+
+    auto hwmon = find_hwmon_by_name(config_["hwmon-name"].asString());
+
+    if (!hwmon) {
+      throw std::runtime_error("hwmon-name '" + config_["hwmon-name"].asString() + "' not found");
+    }
+
+    file_path_ = hwmon->string() + "/" + config_["input-filename"].asString();
+  }
+
   if (file_path_.empty()) {
     auto zone = config_["thermal-zone"].isInt() ? config_["thermal-zone"].asInt() : 0;
     file_path_ = fmt::format("/sys/class/thermal/thermal_zone{}/temp", zone);

From 61af3e95faa77afc699aa142846e9feee793a862 Mon Sep 17 00:00:00 2001
From: Kaosu <kaosuran@protonmail.com>
Date: Sat, 27 Dec 2025 08:38:14 +0100
Subject: [PATCH 2/2] fix the doc

---
 man/waybar-temperature.5.scd | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/man/waybar-temperature.5.scd b/man/waybar-temperature.5.scd
index 672a2518..0783331e 100644
--- a/man/waybar-temperature.5.scd
+++ b/man/waybar-temperature.5.scd
@@ -29,7 +29,7 @@ Addressed by *temperature*
 
 *hwmon-name*: ++
 	typeof: string ++
-	Select a hwmon device by its name (from /sys/class/hwmon/*/name), e.g. *amdgpu*
+	Select a hwmon device by its name (from /sys/class/hwmon/\*/name), e.g. *amdgpu*.
 	Requires *input-filename* to be set.
 	Cannot be used together with *hwmon-path* or *hwmon-path-abs*.