Fixes cross-platform building (func update shadowing), removes gotop-builder trigger.

.github/workflows/release.yml

@@ -14,14 +14,6 @@ jobs:
         run: echo "##[set-output name=tag;]$(echo ${GITHUB_REF##*/})"
         id: tag_name
 
-      - name: Trigger extensions build
-        uses: peter-evans/repository-dispatch@v1
-        with:
-          token: ${{ secrets.REPO_ACCESS_TOKEN }}
-          repository: xxxserxxx/gotop-builder
-          event-type: my-release
-          client-payload: '{"tag": "${{ steps.tag_name.outputs.tag }}"}'
-
       - name: Update Homebrew recipe
         uses: peter-evans/repository-dispatch@v1
         with:

devices/nvidia.go

@@ -96,13 +96,13 @@ func startNVidia(vars map[string]string) error {
 		}
 	}
 	// update once to populate the device names, for the widgets.
-	update()
+	updateNvidia()
 	// Fork off a long-running job to call the nvidia tool periodically,
 	// parse out the values, and put them in the cache.
 	go func() {
 		timer := time.Tick(refresh)
 		for range timer {
-			update()
+			updateNvidia()
 		}
 	}()
 	return nil
@@ -121,7 +121,7 @@ var (
 
 var nvidiaLock sync.Mutex
 
-// update calls the nvidia tool, parses the output, and caches the results
+// updateNvidia calls the nvidia tool, parses the output, and caches the results
 // in the various _* maps. The metric data parsed is: name, index,
 // temperature.gpu, utilization.gpu, utilization.memory, memory.total,
 // memory.free, memory.used
@@ -130,8 +130,8 @@ var nvidiaLock sync.Mutex
 // error and returns immediately. We expect exec errors only when the tool
 // isn't available, or when it fails for some reason; no exec error cases
 // are recoverable. This does **not** stop the cache job; that will continue
-// to run and continue to call update().
+// to run and continue to call updateNvidia().
-func update() {
+func updateNvidia() {
 	bs, err := exec.Command(
 		"nvidia-smi",
 		"--query-gpu=name,index,temperature.gpu,utilization.gpu,memory.total,memory.used",

docs/nvidia-extension.md

@@ -0,0 +1,17 @@
+# gotop NVidia extension
+
+Provides NVidia GPU data to gotop
+
+To enable it, either run gotop with the `--nvidia` flag, or add the line `nvidia=true` to `gotop.config`.
+
+## Dependencies
+
+- [nvidia-smi](https://wiki.archlinux.org/index.php/NVIDIA/Tips_and_tricks#nvidia-smi)
+
+## Configuration
+
+The refresh rate of NVidia data is controlled by the `nvidia-refresh` parameter in the configuration file.  This is a Go `time.Duration` format, for example `2s`, `500ms`, `1m`, etc.
+
+## Alternatives to test
+
+https://github.com/mindprince/gonvml