feat: add append-env mutation models

examples/mutation/append-env/kcl.mod

@@ -0,0 +1,4 @@
+[package]
+name = "append-env"
+edition = "*"
+version = "0.0.1"

examples/mutation/append-env/main.k

@@ -0,0 +1,10 @@
+items = [item | {
+    if item.kind == "Pod":
+        spec.containers: [{
+            env += option("params").env
+        } for container in item.spec.containers]
+    elif item.kind == "Deployment":
+        spec.template.spec.containers: [{
+            env += option("params").env
+        } for container in item.spec.template.spec.containers]
+} for item in option("items") or []]

examples/mutation/append-env/suite/good.yaml

@@ -0,0 +1,37 @@
+apiVersion: krm.kcl.dev/v1alpha1
+kind: KCLRun
+metadata:
+  name: append-env
+  annotations: 
+    krm.kcl.dev/version: 0.0.1
+    krm.kcl.dev/type: mutation
+    documentation: >-
+      Append env list for `Pod` and `Deployment` resources
+spec:
+  params:
+    env:
+      name: test_name
+      value: test_value
+  source: ./examples/mutation/append-env/main.k
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: nginx-deployment
+  labels:
+    app: nginx
+spec:
+  replicas: 3
+  selector:
+    matchLabels:
+      app: nginx
+  template:
+    metadata:
+      labels:
+        app: nginx
+    spec:
+      containers:
+      - name: nginx
+        image: nginx:1.14.2
+        ports:
+        - containerPort: 80