[SPARK-52379] Bump version to 0.4.0-SNAPSHOT in main branch

### What changes were proposed in this pull request?

This PR aims to bump version to `0.4.0-SNAPSHOT` in `main` branch.

### Why are the changes needed?

`branch-0.3` is created. We need to distinguish `main` branch from `branch-0.3`.
- https://github.com/apache/spark-kubernetes-operator/tree/branch-0.3

### Does this PR introduce _any_ user-facing change?

No.

### How was this patch tested?

Pass the CIs.

### Was this patch authored or co-authored using generative AI tooling?

No.

Closes apache#234 from dongjoon-hyun/SPARK-52379.

Authored-by: Dongjoon Hyun <[email protected]>
Signed-off-by: Dongjoon Hyun <[email protected]>

Author: dongjoon-hyun

build-tools/docker/Dockerfile

@@ -24,7 +24,7 @@ RUN --mount=type=cache,target=/home/gradle/.gradle/caches gradle --no-daemon cle
 
 FROM azul/zulu-openjdk:24-jre
 
-ARG APP_VERSION=0.3.0-SNAPSHOT
+ARG APP_VERSION=0.4.0-SNAPSHOT
 ARG SPARK_UID=185
 
 LABEL org.opencontainers.image.authors="Apache Spark project <[email protected]>"

build-tools/helm/spark-kubernetes-operator/Chart.yaml

@@ -14,8 +14,8 @@
 # limitations under the License.
 apiVersion: v2
 name: spark-kubernetes-operator
-version: 1.1.0-dev
-appVersion: 0.3.0-SNAPSHOT
+version: 1.2.0-dev
+appVersion: 0.4.0-SNAPSHOT
 description: The official Helm chart to deploy Apache Spark, an unified engine for large-scale data analytics
 type: application
 home: https://apache.github.io/spark-kubernetes-operator/

build-tools/helm/spark-kubernetes-operator/values.yaml

@@ -16,7 +16,7 @@
 image:
   repository: apache/spark-kubernetes-operator
   pullPolicy: IfNotPresent
-  tag: 0.3.0-SNAPSHOT
+  tag: 0.4.0-SNAPSHOT
   # If image digest is set then it takes precedence and the image tag will be ignored
   # digest: ""
 

build.gradle

@@ -34,7 +34,7 @@ assert JavaVersion.current().isCompatibleWith(JavaVersion.VERSION_17): "Java 17
 
 allprojects {
   group = "org.apache.spark.k8s.operator"
-  version = "0.3.0-SNAPSHOT"
+  version = "0.4.0-SNAPSHOT"
 }
 
 tasks.register('buildDockerImage', Exec) {

docs/operations.md

@@ -63,7 +63,7 @@ following table:
 |---------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------|
 | image.repository                                              | The image repository of spark-kubernetes-operator.                                                                                                                             | apache/spark-kubernetes-operator                                                                               |
 | image.pullPolicy                                              | The image pull policy of spark-kubernetes-operator.                                                                                                                            | IfNotPresent                                                                                            |
-| image.tag                                                     | The image tag of spark-kubernetes-operator.                                                                                                                                    | 0.3.0-SNAPSHOT                                                                                          |
+| image.tag                                                     | The image tag of spark-kubernetes-operator.                                                                                                                                    | 0.4.0-SNAPSHOT                                                                                          |
 | image.digest                                                  | The image digest of spark-kubernetes-operator. If set then it takes precedence and the image tag will be ignored.                                                              |                                                                                                         |
 | imagePullSecrets                                              | The image pull secrets of spark-kubernetes-operator.                                                                                                                           |                                                                                                         |
 | operatorDeployment.replica                                    | Operator replica count. Must be 1 unless leader election is configured.                                                                                                        | 1                                                                                                       |

tests/e2e/watched-namespaces/spark-operator-dynamic-config-1.yaml

@@ -28,7 +28,7 @@ metadata:
     app.kubernetes.io/component: operator-dynamic-config-overrides
     app.kubernetes.io/managed-by: Helm
     app.kubernetes.io/name: spark-kubernetes-operator
-    app.kubernetes.io/version: 0.3.0-SNAPSHOT
-    helm.sh/chart: spark-kubernetes-operator-1.1.0-dev
+    app.kubernetes.io/version: 0.4.0-SNAPSHOT
+    helm.sh/chart: spark-kubernetes-operator-1.2.0-dev
   name: spark-kubernetes-operator-dynamic-configuration
   namespace: default

tests/e2e/watched-namespaces/spark-operator-dynamic-config-2.yaml

@@ -28,7 +28,7 @@ metadata:
     app.kubernetes.io/component: operator-dynamic-config-overrides
     app.kubernetes.io/managed-by: Helm
     app.kubernetes.io/name: spark-kubernetes-operator
-    app.kubernetes.io/version: 0.3.0-SNAPSHOT
-    helm.sh/chart: spark-kubernetes-operator-1.1.0-dev
+    app.kubernetes.io/version: 0.4.0-SNAPSHOT
+    helm.sh/chart: spark-kubernetes-operator-1.2.0-dev
   name: spark-kubernetes-operator-dynamic-configuration
   namespace: default