Merge branch 'add-match-label-patcher' into 'master'

Add addional patcher to make it possible to set matchlabels

See merge request !239

docs/api-reference/patchers.md

@@ -53,6 +53,27 @@ Patchers can be seen as functions which take a value as input and modify a Kuber
   * **resource**: "uc1-kstreams-deployment.yaml"
   * **example value**: "random-scheduler"
 
+* **LabelPatcher**: Changes the label of a Kubernetes Deployment or StatefulSet. The patched field is: `metadata.labels`
+  * **type**: "LabelPatcher"
+  * **resource**: "uc1-kstreams-deployment.yaml"
+  * **properties**:
+    * variableName: "app"
+  * **example value**: "theodolite-sut"
+
+* **MatchLabelPatcher**: Changes the match labels of a Kubernetes Deployment or StatefulSet. The patched field is: `spec.selector.matchLabels`
+  * **type**: "MatchLabelPatcher"
+  * **resource**: "uc1-kstreams-deployment.yaml"
+  * **properties**:
+    * variableName: "app"
+  * **example value**: "theodolite-sut"
+
+* **TemplateLabelPatcher**: Changes the template labels of a Kubernetes Deployment or StatefulSet. The patched field is: `spec.template.metadata.labels`
+  * **type**: "MatchLabelPatcher"
+  * **resource**: "uc1-kstreams-deployment.yaml"
+  * **properties**:
+    * variableName: "app"
+  * **example value**: "theodolite-sut"
+
 * **ImagePatcher**: Changes the image of a Kubernetes resource. **Currently not fully implemented.**
   * **type**: "ImagePatcher"
   * **resource**: "uc1-kstreams-deployment.yaml"

theodolite/src/main/kotlin/theodolite/patcher/MatchLabelPatcher.kt

+package theodolite.patcher
+
+import io.fabric8.kubernetes.api.model.KubernetesResource
+import io.fabric8.kubernetes.api.model.apps.Deployment
+import io.fabric8.kubernetes.api.model.apps.StatefulSet
+
+/**
+ * This patcher is able to set the `spec.selector.matchLabels` for a `Deployment` or `StatefulSet` Kubernetes resource.
+ *
+ * @property k8sResource The Kubernetes manifests to patch
+ * @property variableName The matchLabel which should be set
+ */
+class MatchLabelPatcher(private val k8sResource: KubernetesResource, val variableName: String) :
+    AbstractPatcher(k8sResource) {
+
+    override fun <String> patch(labelValue: String) {
+        if (labelValue is kotlin.String) {
+            when (k8sResource) {
+                is Deployment -> {
+                    if (k8sResource.spec.selector.matchLabels == null) {
+                        k8sResource.spec.selector.matchLabels = mutableMapOf()
+                    }
+                    k8sResource.spec.selector.matchLabels[this.variableName] = labelValue
+                }
+                is StatefulSet -> {
+                    if (k8sResource.spec.selector.matchLabels == null) {
+                        k8sResource.spec.selector.matchLabels = mutableMapOf()
+                    }
+                    k8sResource.spec.selector.matchLabels[this.variableName] = labelValue
+                }
+            }
+        }
+    }
+}
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theodolite/src/main/kotlin/theodolite/patcher/PatcherFactory.kt

@@ -79,6 +79,14 @@ class PatcherFactory {
                     k8sResource = resource,
                     variableName = patcherDefinition.properties["variableName"]!!
                 )
+                "MatchLabelPatcher" -> MatchLabelPatcher(
+                    k8sResource = resource,
+                    variableName = patcherDefinition.properties["variableName"]!!
+                )
+                "TemplateLabelPatcher" -> TemplateLabelPatcher(
+                    k8sResource = resource,
+                    variableName = patcherDefinition.properties["variableName"]!!
+                )
                 "ImagePatcher" -> ImagePatcher(
                     k8sResource = resource,
                     container = patcherDefinition.properties["container"]!!

theodolite/src/main/kotlin/theodolite/patcher/TemplateLabelPatcher.kt

+package theodolite.patcher
+
+import io.fabric8.kubernetes.api.model.KubernetesResource
+import io.fabric8.kubernetes.api.model.apps.Deployment
+import io.fabric8.kubernetes.api.model.apps.StatefulSet
+
+/**
+ * This patcher is able to set the field `spec.template.metadata.labels` for a `Deployment` or `StatefulSet` Kubernetes resource.
+ *
+ * @property k8sResource The Kubernetes manifests to patch
+ * @property variableName The label which should be set
+ */
+class TemplateLabelPatcher(private val k8sResource: KubernetesResource, val variableName: String) :
+    AbstractPatcher(k8sResource) {
+
+    override fun <String> patch(labelValue: String) {
+        if (labelValue is kotlin.String) {
+            when (k8sResource) {
+                is Deployment -> {
+                    if (k8sResource.spec.template.metadata.labels == null) {
+                        k8sResource.spec.template.metadata.labels = mutableMapOf()
+                    }
+                    k8sResource.spec.template.metadata.labels[this.variableName] = labelValue
+                }
+                is StatefulSet -> {
+                    if (k8sResource.spec.template.metadata.labels == null) {
+                        k8sResource.spec.template.metadata.labels = mutableMapOf()
+                    }
+                    k8sResource.spec.template.metadata.labels[this.variableName] = labelValue
+                }
+            }
+        }
+    }
+}
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