collector: Add disable flag (#2165)

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

cmd/windows_exporter/main.go

@@ -89,6 +89,10 @@ func run(ctx context.Context, args []string) int {
 			"collectors.enabled",
 			"Comma-separated list of collectors to use. Use '[defaults]' as a placeholder for all the collectors enabled by default.").
 			Default(collector.DefaultCollectors).String()
+		disabledCollectors = app.Flag(
+			"collectors.disabled",
+			"Comma-separated list of collectors to exclude. Can be used to disable collector from the defaults.").
+			Default("").String()
 		timeoutMargin = app.Flag(
 			"scrape.timeout-margin",
 			"Seconds to subtract from the timeout allowed by the client. Tune to allow for overhead or high loads.",
@@ -166,6 +170,10 @@ func run(ctx context.Context, args []string) int {
 		return 1
 	}
 
+	if *disabledCollectors != "" {
+		collectors.Disable(slices.Compact(strings.Split(*disabledCollectors, ",")))
+	}
+
 	// Initialize collectors before loading
 	if err = collectors.Build(ctx, logger); err != nil {
 		for _, err := range utils.SplitError(err) {

pkg/collector/collection.go

@@ -198,6 +198,15 @@ func (c *Collection) Enable(enabledCollectors []string) error {
 	return nil
 }
 
+// Disable removes all collectors that are listed in disabledCollectors.
+func (c *Collection) Disable(disabledCollectors []string) {
+	for name := range c.collectors {
+		if slices.Contains(disabledCollectors, name) {
+			delete(c.collectors, name)
+		}
+	}
+}
+
 // Build To be called by the exporter for collector initialization.
 // Instead, fail fast, it will try to build all collectors and return all errors.
 // errors are joined with errors.Join.