Split k8s yaml template into subtemplates

src/TextTemplate/TemplateEngine.cs

@@ -157,11 +157,18 @@
                 if (args.Length == 0) return string.Empty;
                 string fmt = args[0]?.ToString() ?? string.Empty;
                 var rest = args.Skip(1).ToArray();
                 return SprintfFormatter.Format(fmt, rest);
             },
             ["html"] = args => System.Net.WebUtility.HtmlEncode(string.Concat(args.Select(a => a?.ToString()))),
             ["js"] = args => System.Text.Encodings.Web.JavaScriptEncoder.Default.Encode(string.Concat(args.Select(a => a?.ToString()))),
             ["urlquery"] = args => Uri.EscapeDataString(string.Concat(args.Select(a => a?.ToString()))),
+            ["quote"] = args =>
+            {
+                if (args.Length == 0 || args[0] == null) return string.Empty;
+                var s = args[0]?.ToString() ?? string.Empty;
+                s = s.Replace("\"", "\\\"");
+                return $"\"{s}\"";
+            },
             ["len"] = args =>
             {
                 if (args.Length == 0 || args[0] == null) return 0;
@@ -189,7 +196,7 @@
                     }
                     if (current is IDictionary dict)
                     {
                         current = dict[key];
                         continue;
                     }
                     current = null;

tests/TextTemplate.Tests/TestData/k8s-template-data.yml

@@ -0,0 +1,5 @@
+{{template "deployment" .}}
+---
+{{template "service" .}}
+---
+{{template "ingress" .}}

tests/TextTemplate.Tests/TestData/k8s-template-deployment.yml

@@ -0,0 +1,97 @@
+{{define "deployment"}}
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: {{ .Values.appName }}-deployment
+  namespace: {{ .Values.namespace | default "default" }}
+  labels:
+    app: {{ .Values.appName }}
+    version: {{ .Values.version }}
+    {{- if .Values.environment }}
+    environment: {{ .Values.environment }}
+    {{- end }}
+    {{- range $key, $value := .Values.customLabels }}
+    {{ $key }}: {{ $value }}
+    {{- end }}
+spec:
+  replicas: {{ .Values.replicaCount | default 3 }}
+  selector:
+    matchLabels:
+      app: {{ .Values.appName }}
+  template:
+    metadata:
+      labels:
+        app: {{ .Values.appName }}
+        version: {{ .Values.version }}
+    spec:
+      containers:
+      - name: {{ .Values.appName }}
+        image: {{ .Values.image.repository }}:{{ .Values.image.tag }}
+        ports:
+        - containerPort: {{ .Values.service.port }}
+        {{- if .Values.env }}
+        env:
+        {{- range .Values.env }}
+        - name: {{ .name }}
+          value: {{ .value | quote }}
+        {{- end }}
+        {{- end }}
+        {{- if .Values.resources }}
+        resources:
+          {{- if .Values.resources.limits }}
+          limits:
+            {{- range $key, $value := .Values.resources.limits }}
+            {{ $key }}: {{ $value }}
+            {{- end }}
+          {{- end }}
+          {{- if .Values.resources.requests }}
+          requests:
+            {{- range $key, $value := .Values.resources.requests }}
+            {{ $key }}: {{ $value }}
+            {{- end }}
+          {{- end }}
+        {{- end }}
+        {{- if .Values.volumeMounts }}
+        volumeMounts:
+        {{- range .Values.volumeMounts }}
+        - name: {{ .name }}
+          mountPath: {{ .mountPath }}
+          {{- if .readOnly }}
+          readOnly: {{ .readOnly }}
+          {{- end }}
+        {{- end }}
+        {{- end }}
+      {{- if .Values.volumes }}
+      volumes:
+      {{- range .Values.volumes }}
+      - name: {{ .name }}
+        {{- if .configMap }}
+        configMap:
+          name: {{ .configMap.name }}
+        {{- else if .secret }}
+        secret:
+          secretName: {{ .secret.secretName }}
+        {{- else if .persistentVolumeClaim }}
+        persistentVolumeClaim:
+          claimName: {{ .persistentVolumeClaim.claimName }}
+        {{- end }}
+      {{- end }}
+      {{- end }}
+      {{- if .Values.nodeSelector }}
+      nodeSelector:
+        {{- range $key, $value := .Values.nodeSelector }}
+        {{ $key }}: {{ $value }}
+        {{- end }}
+      {{- end }}
+      {{- if .Values.tolerations }}
+      tolerations:
+      {{- range .Values.tolerations }}
+      - key: {{ .key }}
+        operator: {{ .operator | default "Equal" }}
+        {{- if .value }}
+        value: {{ .value }}
+        {{- end }}
+        effect: {{ .effect }}
+      {{- end }}
+      {{- end }}
+{{end}}

tests/TextTemplate.Tests/TestData/k8s-template-ingress.yml

@@ -0,0 +1,41 @@
+{{define "ingress"}}
+{{- if .Values.ingress.enabled }}
+apiVersion: networking.k8s.io/v1
+kind: Ingress
+metadata:
+  name: {{ .Values.appName }}-ingress
+  namespace: {{ .Values.namespace | default "default" }}
+  {{- if .Values.ingress.annotations }}
+  annotations:
+    {{- range $key, $value := .Values.ingress.annotations }}
+    {{ $key }}: {{ $value | quote }}
+    {{- end }}
+  {{- end }}
+spec:
+  {{- if .Values.ingress.tls }}
+  tls:
+  {{- range .Values.ingress.tls }}
+  - hosts:
+    {{- range .hosts }}
+    - {{ . }}
+    {{- end }}
+    secretName: {{ .secretName }}
+  {{- end }}
+  {{- end }}
+  rules:
+  {{- range .Values.ingress.hosts }}
+  - host: {{ .host }}
+    http:
+      paths:
+      {{- range .paths }}
+      - path: {{ .path }}
+        pathType: {{ .pathType | default "Prefix" }}
+        backend:
+          service:
+            name: {{ $.Values.appName }}-service
+            port:
+              number: {{ $.Values.service.port }}
+      {{- end }}
+  {{- end }}
+{{- end }}
+{{end}}

tests/TextTemplate.Tests/TestData/k8s-template-service.yml

@@ -0,0 +1,22 @@
+{{define "service"}}
+{{- if .Values.service.enabled }}
+apiVersion: v1
+kind: Service
+metadata:
+  name: {{ .Values.appName }}-service
+  namespace: {{ .Values.namespace | default "default" }}
+  labels:
+    app: {{ .Values.appName }}
+spec:
+  type: {{ .Values.service.type | default "ClusterIP" }}
+  ports:
+  - port: {{ .Values.service.port }}
+    targetPort: {{ .Values.service.targetPort | default .Values.service.port }}
+    protocol: TCP
+    {{- if .Values.service.nodePort }}
+    nodePort: {{ .Values.service.nodePort }}
+    {{- end }}
+  selector:
+    app: {{ .Values.appName }}
+{{- end }}
+{{end}}

tests/TextTemplate.Tests/TestData/template.yml → tests/TextTemplate.Tests/TestData/single-k8s-data.yml

@@ -108,7 +108,7 @@ spec:
   - port: {{ .Values.service.port }}
     targetPort: {{ .Values.service.targetPort | default .Values.service.port }}
     protocol: TCP
-    {{- if and (eq .Values.service.type "NodePort") .Values.service.nodePort }}
+    {{- if .Values.service.nodePort }}
     nodePort: {{ .Values.service.nodePort }}
     {{- end }}
   selector:

tests/TextTemplate.Tests/TestData/single-k8s-expected.yml

@@ -0,0 +1,136 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: my-web-app-deployment
+  namespace: production
+  labels:
+    app: my-web-app
+    version: "1.2.3"
+    environment: prod
+    team: backend
+    cost-center: engineering
+    project: web-platform
+spec:
+  replicas: 5
+  selector:
+    matchLabels:
+      app: my-web-app
+  template:
+    metadata:
+      labels:
+        app: my-web-app
+        version: "1.2.3"
+    spec:
+      containers:
+      - name: my-web-app
+        image: myregistry.com/my-web-app:v1.2.3
+        ports:
+        - containerPort: 80
+        env:
+        - name: DATABASE_URL
+          value: "postgresql://db.example.com:5432/myapp"
+        - name: REDIS_HOST
+          value: "redis.example.com"
+        - name: LOG_LEVEL
+          value: "info"
+        - name: API_KEY
+          value: "secret-api-key-123"
+        resources:
+          limits:
+            cpu: "1000m"
+            memory: "1Gi"
+          requests:
+            cpu: "500m"
+            memory: "512Mi"
+        volumeMounts:
+        - name: config-volume
+          mountPath: /etc/config
+          readOnly: true
+        - name: secret-volume
+          mountPath: /etc/secrets
+          readOnly: true
+        - name: data-volume
+          mountPath: /var/data
+      volumes:
+      - name: config-volume
+        configMap:
+          name: my-web-app-config
+      - name: secret-volume
+        secret:
+          secretName: my-web-app-secrets
+      - name: data-volume
+        persistentVolumeClaim:
+          claimName: my-web-app-data
+      nodeSelector:
+        kubernetes.io/os: linux
+        node-type: web-tier
+      tolerations:
+      - key: "node-type"
+        operator: "Equal"
+        value: "web-tier"
+        effect: "NoSchedule"
+      - key: "dedicated"
+        operator: "Equal"
+        value: "web-app"
+        effect: "NoExecute"
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: my-web-app-service
+  namespace: production
+  labels:
+    app: my-web-app
+spec:
+  type: LoadBalancer
+  ports:
+  - port: 80
+    targetPort: 8080
+    protocol: TCP
+    nodePort: 30080
+  selector:
+    app: my-web-app
+---
+apiVersion: networking.k8s.io/v1
+kind: Ingress
+metadata:
+  name: my-web-app-ingress
+  namespace: production
+  annotations:
+    kubernetes.io/ingress.class: "nginx"
+    cert-manager.io/cluster-issuer: "letsencrypt-prod"
+    nginx.ingress.kubernetes.io/rewrite-target: "/"
+spec:
+  tls:
+  - hosts:
+    - myapp.example.com
+    - api.myapp.example.com
+    secretName: myapp-tls-cert
+  rules:
+  - host: myapp.example.com
+    http:
+      paths:
+      - path: /
+        pathType: Prefix
+        backend:
+          service:
+            name: my-web-app-service
+            port:
+              number: 80
+      - path: /api
+        pathType: Prefix
+        backend:
+          service:
+            name: my-web-app-service
+            port:
+              number: 80
+  - host: api.myapp.example.com
+    http:
+      paths:
+      - path: /
+        pathType: Prefix
+        backend:
+          service:
+            name: my-web-app-service
+            port:
+              number: 80

tests/TextTemplate.Tests/TextTemplate.Tests.csproj

@@ -37,10 +37,25 @@
     <None Include="TestData\operations_expected.txt">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </None>
-    <None Include="TestData\template.yml">
+    <None Include="TestData\single-k8s-data.yml">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </None>
-    <None Include="TestData\expected.yml">
+    <None Include="TestData\single-k8s-expected.yml">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </None>
+    <None Include="TestData\k8s-template-data.yml">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </None>
+    <None Include="TestData\k8s-template-deployment.yml">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </None>
+    <None Include="TestData\k8s-template-service.yml">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </None>
+    <None Include="TestData\k8s-template-ingress.yml">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </None>
+    <None Include="TestData\k8s-template-expected.yml">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </None>
     <None Include="TestData\inheritance_template.txt">