refactor(overlays): pin smartctl_exporter to the upstream #329 commit

Replace the backported patch with a src/version/vendorHash override that pins prometheus-smartctl-exporter to upstream 6274decc (2026-09-28), which already carries the Describe() fix from PR #329. Simpler to maintain than a patch file and it tracks the upstream change directly; drop the overlay once smartctl_exporter 0.15.0 is packaged in nixpkgs.

overlays/README.md

@@ -13,9 +13,8 @@ overlays/
 ├── default.nix            # Entrypoint for all overlays
 ├── computer-use-linux.nix # trycua/computer-use-linux package
 ├── cua-driver.nix         # trycua/cua driver (cua-driver) package
-├── smartctl-exporter/     # smartctl_exporter backport (upstream PR #329)
-│   ├── default.nix
-│   └── 329-explicit-descriptors.patch
+├── smartctl-exporter/     # smartctl_exporter pinned to the #329 fix
+│   └── default.nix
 └── fcitx5/                # Chinese input method configuration
     ├── README.md
     ├── default.nix        # fcitx5 overlay definition
@@ -58,6 +57,6 @@ This overlay provides:
 
 - `computer-use-linux.nix`: packages `pkgs/computer-use-linux`.
 - `cua-driver.nix`: packages `pkgs/cua-driver` (used by the computer-use VMs).
-- `smartctl-exporter/`: patches `prometheus-smartctl-exporter` with upstream PR
+- `smartctl-exporter/`: pins `prometheus-smartctl-exporter` to the upstream commit carrying PR
   [#329](https://github.com/prometheus-community/smartctl_exporter/pull/329) until smartctl_exporter
   0.15.0 is released; see `overlays/smartctl-exporter/default.nix`.

overlays/smartctl-exporter/329-explicit-descriptors.patch

@@ -1,50 +0,0 @@
-diff --git a/main.go b/main.go
-index c5b138a..05a222e 100644
---- a/main.go
-+++ b/main.go
-@@ -57,7 +57,44 @@ type SMARTctlManagerCollector struct {
- 
- // Describe sends the super-set of all possible descriptors of metrics
- func (i *SMARTctlManagerCollector) Describe(ch chan<- *prometheus.Desc) {
--	prometheus.DescribeByCollect(i, ch)
-+	ch <- metricSmartctlVersion
-+	ch <- metricDeviceModel
-+	ch <- metricDeviceCount
-+	ch <- metricDeviceCapacityBlocks
-+	ch <- metricDeviceCapacityBytes
-+	ch <- metricDeviceTotalCapacityBytes
-+	ch <- metricDeviceBlockSize
-+	ch <- metricDeviceInterfaceSpeed
-+	ch <- metricDeviceAttribute
-+	ch <- metricDevicePowerOnSeconds
-+	ch <- metricDeviceRotationRate
-+	ch <- metricDeviceTemperature
-+	ch <- metricDevicePowerCycleCount
-+	ch <- metricDevicePercentageUsed
-+	ch <- metricDeviceAvailableSpare
-+	ch <- metricDeviceAvailableSpareThreshold
-+	ch <- metricDeviceCriticalWarning
-+	ch <- metricDeviceMediaErrors
-+	ch <- metricDeviceNumErrLogEntries
-+	ch <- metricDeviceBytesRead
-+	ch <- metricDeviceBytesWritten
-+	ch <- metricDeviceSmartStatus
-+	ch <- metricDeviceExitStatus
-+	ch <- metricDeviceState
-+	ch <- metricDeviceStatistics
-+	ch <- metricDeviceErrorLogCount
-+	ch <- metricDeviceSelfTestLogCount
-+	ch <- metricDeviceSelfTestLogErrorCount
-+	ch <- metricDeviceERCSeconds
-+	ch <- metricSCSIGrownDefectList
-+	ch <- metricReadErrorsCorrectedByRereadsRewrites
-+	ch <- metricReadErrorsCorrectedByEccFast
-+	ch <- metricReadErrorsCorrectedByEccDelayed
-+	ch <- metricReadTotalUncorrectedErrors
-+	ch <- metricWriteErrorsCorrectedByRereadsRewrites
-+	ch <- metricWriteErrorsCorrectedByEccFast
-+	ch <- metricWriteErrorsCorrectedByEccDelayed
-+	ch <- metricWriteTotalUncorrectedErrors
- }
- 
- // Collect is called by the Prometheus registry when collecting metrics.

overlays/smartctl-exporter/default.nix

@@ -1,15 +1,23 @@
 # smartctl_exporter 0.14.0 derives `Describe()` from the devices it can read at
 # startup, so when a device only becomes readable later (an NVMe whose ACL
 # arrives late, or an HDD waking from standby) `Collect()` emits metrics whose
-# descriptors were never registered and `/metrics` starts returning HTTP 500,
-# which fails the whole scrape and hides even the healthy disks.
+# descriptors were never registered and `/metrics` returns HTTP 500, failing the
+# whole scrape and hiding even the healthy disks.
 #
-# Backport of upstream PR #329: `Describe()` now sends the full, explicit
-# descriptor set. Drop this overlay once smartctl_exporter 0.15.0 is released
-# and packaged in nixpkgs:
+# Pin the package to the upstream commit that carries the fix (PR #329, merged
+# 2026-09-28, then included in the "Update Go (#391)" commit below) instead of
+# backporting it as a patch. Drop this overlay once smartctl_exporter 0.15.0 is
+# released and packaged in nixpkgs:
 #   https://github.com/prometheus-community/smartctl_exporter/pull/329
 _: _final: prev: {
-  prometheus-smartctl-exporter = prev.prometheus-smartctl-exporter.overrideAttrs (prevAttrs: {
-    patches = (prevAttrs.patches or [ ]) ++ [ ./329-explicit-descriptors.patch ];
+  prometheus-smartctl-exporter = prev.prometheus-smartctl-exporter.overrideAttrs (_prev: {
+    version = "0.14.0-unstable-2026-09-28";
+    src = prev.fetchFromGitHub {
+      owner = "prometheus-community";
+      repo = "smartctl_exporter";
+      rev = "6274decc61212cc61e58796cc3b8cf5cfa035809";
+      hash = "sha256-KR+j4uLqxVtRpQ7L8UxOypOHZG9CxUGw0ELIO7e6tXc=";
+    };
+    vendorHash = "sha256-PJiMYWdoQ3Zk7sYHveG9uIgOjllgPuu6RjAPVdKUi6Y=";
   });
 }