Add helm diff logic and starting e2e test implementation

Author: dmvolod

README.md

@@ -1,7 +1,7 @@
 <a href="https://cluster-api.sigs.k8s.io"><img alt="capi" src="./logos/kubernetes-cluster-logos_final-02.svg" width="160x" /></a>
 <p>
 <a href="https://godoc.org/sigs.k8s.io/cluster-api"><img src="https://godoc.org/sigs.k8s.io/cluster-api?status.svg"></a>
-<!-- join kubernetes slack channel for cluster-api -->
+<!-- join kubernetes Slack channel for cluster-api -->
 <a href="http://slack.k8s.io/">
 <img src="https://img.shields.io/badge/join%20slack-%23cluster--api-brightgreen"></a>
 </p>

config/manager/manager.yaml

@@ -46,6 +46,8 @@ spec:
               value: /tmp/xdg/.cache
             - name: XDG_CONFIG_DIRS
               value: /tmp/xdg
+            - name: KUBECACHEDIR
+              value: /tmp/.kube/cache
           image: controller:latest
           imagePullPolicy: Always
           name: manager

controllers/helmreleasedrift/releasedrift_controller.go

@@ -45,6 +45,11 @@ var excludeCreateEventsPredicate = predicate.Funcs{
 	CreateFunc: func(e event.CreateEvent) bool {
 		return false
 	},
+	/*
+		UpdateFunc: func(e event.UpdateEvent) bool {
+			return false
+		},
+	*/
 }
 
 // setupWithManager sets up the controller with the Manager.

go.mod

@@ -6,6 +6,7 @@ toolchain go1.22.10
 
 require (
 	github.com/Masterminds/sprig/v3 v3.3.0
+	github.com/databus23/helm-diff/v3 v3.0.0-00010101000000-000000000000
 	github.com/google/go-cmp v0.6.0
 	github.com/ironcore-dev/controller-utils v0.9.4
 	github.com/onsi/ginkgo/v2 v2.22.2
@@ -45,6 +46,7 @@ require (
 	github.com/adrg/xdg v0.5.3 // indirect
 	github.com/alessio/shellescape v1.4.2 // indirect
 	github.com/antlr4-go/antlr/v4 v4.13.0 // indirect
+	github.com/aryann/difflib v0.0.0-20170710044230-e206f873d14a // indirect
 	github.com/asaskevich/govalidator v0.0.0-20200428143746-21a406dcc535 // indirect
 	github.com/beorn7/perks v1.0.1 // indirect
 	github.com/blang/semver/v4 v4.0.0 // indirect
@@ -66,7 +68,7 @@ require (
 	github.com/docker/go-units v0.5.0 // indirect
 	github.com/drone/envsubst/v2 v2.0.0-20210730161058-179042472c46 // indirect
 	github.com/emicklei/go-restful/v3 v3.12.1 // indirect
-	github.com/evanphx/json-patch v5.7.0+incompatible // indirect
+	github.com/evanphx/json-patch v5.9.0+incompatible // indirect
 	github.com/evanphx/json-patch/v5 v5.9.0 // indirect
 	github.com/exponent-io/jsonpath v0.0.0-20151013193312-d6023ce2651d // indirect
 	github.com/fatih/color v1.18.0 // indirect
@@ -87,6 +89,12 @@ require (
 	github.com/gogo/protobuf v1.3.2 // indirect
 	github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da // indirect
 	github.com/golang/protobuf v1.5.4 // indirect
+	github.com/gonvenience/bunt v1.3.5 // indirect
+	github.com/gonvenience/neat v1.3.13 // indirect
+	github.com/gonvenience/term v1.0.2 // indirect
+	github.com/gonvenience/text v1.0.7 // indirect
+	github.com/gonvenience/wrap v1.2.0 // indirect
+	github.com/gonvenience/ytbx v1.4.4 // indirect
 	github.com/google/btree v1.0.1 // indirect
 	github.com/google/cel-go v0.20.1 // indirect
 	github.com/google/gnostic-models v0.6.8 // indirect
@@ -105,6 +113,7 @@ require (
 	github.com/hashicorp/errwrap v1.1.0 // indirect
 	github.com/hashicorp/go-multierror v1.1.1 // indirect
 	github.com/hashicorp/hcl v1.0.0 // indirect
+	github.com/homeport/dyff v1.9.0 // indirect
 	github.com/huandu/xstrings v1.5.0 // indirect
 	github.com/imdario/mergo v0.3.13 // indirect
 	github.com/inconshreveable/mousetrap v1.1.0 // indirect
@@ -116,13 +125,18 @@ require (
 	github.com/lann/ps v0.0.0-20150810152359-62de8c46ede0 // indirect
 	github.com/lib/pq v1.10.9 // indirect
 	github.com/liggitt/tabwriter v0.0.0-20181228230101-89fcab3d43de // indirect
+	github.com/lucasb-eyer/go-colorful v1.2.0 // indirect
 	github.com/magiconair/properties v1.8.8 // indirect
 	github.com/mailru/easyjson v0.7.7 // indirect
+	github.com/mattn/go-ciede2000 v0.0.0-20170301095244-782e8c62fec3 // indirect
 	github.com/mattn/go-colorable v0.1.13 // indirect
 	github.com/mattn/go-isatty v0.0.20 // indirect
 	github.com/mattn/go-runewidth v0.0.14 // indirect
+	github.com/mgutz/ansi v0.0.0-20200706080929-d51e80ef957d // indirect
 	github.com/mitchellh/copystructure v1.2.0 // indirect
+	github.com/mitchellh/go-ps v1.0.0 // indirect
 	github.com/mitchellh/go-wordwrap v1.0.1 // indirect
+	github.com/mitchellh/hashstructure v1.1.0 // indirect
 	github.com/mitchellh/mapstructure v1.5.0 // indirect
 	github.com/mitchellh/reflectwalk v1.0.2 // indirect
 	github.com/moby/docker-image-spec v1.3.1 // indirect
@@ -148,6 +162,7 @@ require (
 	github.com/russross/blackfriday/v2 v2.1.0 // indirect
 	github.com/sagikazarmark/locafero v0.4.0 // indirect
 	github.com/sagikazarmark/slog-shim v0.1.0 // indirect
+	github.com/sergi/go-diff v1.3.2-0.20230802210424-5b0b94c5c0d3 // indirect
 	github.com/shopspring/decimal v1.4.0 // indirect
 	github.com/sirupsen/logrus v1.9.3 // indirect
 	github.com/sourcegraph/conc v0.3.0 // indirect
@@ -157,7 +172,9 @@ require (
 	github.com/spf13/viper v1.19.0 // indirect
 	github.com/stoewer/go-strcase v1.2.0 // indirect
 	github.com/subosito/gotenv v1.6.0 // indirect
+	github.com/texttheater/golang-levenshtein v1.0.1 // indirect
 	github.com/valyala/fastjson v1.6.4 // indirect
+	github.com/virtuald/go-ordered-json v0.0.0-20170621173500-b18e6e673d74 // indirect
 	github.com/x448/float16 v0.8.4 // indirect
 	github.com/xeipuuv/gojsonpointer v0.0.0-20190905194746-02993c407bfb // indirect
 	github.com/xeipuuv/gojsonreference v0.0.0-20180127040603-bd5ef7bd5415 // indirect
@@ -207,4 +224,7 @@ require (
 	sigs.k8s.io/yaml v1.4.0 // indirect
 )
 
-replace sigs.k8s.io/cluster-api => sigs.k8s.io/cluster-api v1.9.3
+replace (
+	github.com/databus23/helm-diff/v3 => github.com/dmvolod/helm-diff/v3 v3.9.10-fix.2
+	sigs.k8s.io/cluster-api => sigs.k8s.io/cluster-api v1.9.3
+)