From 88fa1b88f88a97ccf461c013e9c55237f381c369 Mon Sep 17 00:00:00 2001
From: Matheus Pimenta <matheuscscp@gmail.com>
Date: Mon, 1 May 2023 00:23:20 +0100
Subject: [PATCH] Add values hash to event metadata

Signed-off-by: Matheus Pimenta <matheuscscp@gmail.com>
---
 internal/controllers/helmrelease_controller.go | 18 +++++++++++++++---
 1 file changed, 15 insertions(+), 3 deletions(-)

diff --git a/internal/controllers/helmrelease_controller.go b/internal/controllers/helmrelease_controller.go
index fb3dc3ada..1cc74884d 100644
--- a/internal/controllers/helmrelease_controller.go
+++ b/internal/controllers/helmrelease_controller.go
@@ -18,6 +18,8 @@ package controllers
 
 import (
 	"context"
+	"crypto/sha256"
+	"encoding/json"
 	"errors"
 	"fmt"
 	"strings"
@@ -792,11 +794,21 @@ func (r *HelmReleaseReconciler) requestsForHelmChartChange(o client.Object) []re
 }
 
 // event emits a Kubernetes event and forwards the event to notification controller if configured.
-func (r *HelmReleaseReconciler) event(_ context.Context, hr v2.HelmRelease, revision, severity, msg string) {
-	var meta map[string]string
+func (r *HelmReleaseReconciler) event(ctx context.Context, hr v2.HelmRelease, revision, severity, msg string) {
+	meta := make(map[string]string)
+
 	if revision != "" {
-		meta = map[string]string{v2.GroupVersion.Group + "/revision": revision}
+		meta[v2.GroupVersion.Group+"/revision"] = revision
 	}
+
+	// values hash. here json.Marshal() gives stability to the hash
+	valuesBytes, err := json.Marshal(hr.GetValues())
+	if err != nil {
+		valuesBytes = nil
+		ctrl.LoggerFrom(ctx).Error(err, "unable to marshal helm values")
+	}
+	meta[v2.GroupVersion.Group+"/config_hash"] = fmt.Sprintf("%x", sha256.Sum256(valuesBytes))
+
 	eventtype := "Normal"
 	if severity == eventv1.EventSeverityError {
 		eventtype = "Warning"