shyiko · JorgenEvens · May 5, 2019
diff --git a/example/directory/index.html b/example/directory/index.html
@@ -0,0 +1,2 @@
+<!doctype html>
+<title>*</title>
diff --git a/example/directory/nginx.$.yml b/example/directory/nginx.$.yml
@@ -0,0 +1,32 @@
+# kubetpl:syntax:$
+
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: $NAME
+data:
+  index.html: "$MESSAGE"
+---
+apiVersion: apps/v1beta1
+kind: Deployment
+metadata:
+  name: $NAME
+spec:
+  replicas: 1
+  template:
+    metadata:
+      labels:
+        app: $NAME
+    spec:
+      containers:
+      - name: nginx
+        image: nginx:1.7.9
+        ports:
+        - containerPort: 80
+        volumeMounts:
+        - name: $NAME-volume
+          mountPath: /usr/share/nginx/html
+      volumes:
+      - name: $NAME-volume
+        configMap:
+          name: $NAME
diff --git a/example/directory/nginx.go-template.yml b/example/directory/nginx.go-template.yml
@@ -0,0 +1,32 @@
+# kubetpl:syntax:go-template
+
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: {{ .NAME }}
+data:
+  index.html: {{ .MESSAGE | quote }}
+---
+apiVersion: apps/v1beta1
+kind: Deployment
+metadata:
+  name: {{ .NAME }}
+spec:
+  replicas: 1
+  template:
+    metadata:
+      labels:
+        app: {{ .NAME }}
+    spec:
+      containers:
+      - name: nginx
+        image: nginx:1.7.9
+        ports:
+        - containerPort: 80
+        volumeMounts:
+        - name: {{ .NAME }}-volume
+          mountPath: /usr/share/nginx/html
+      volumes:
+      - name: {{ .NAME }}-volume
+        configMap:
+          name: {{ .NAME }}
diff --git a/kubetpl.go b/kubetpl.go
@@ -16,6 +16,7 @@ import (
 	"net/http"
 	"os"
 	"path/filepath"
+	"sort"
 	"strings"
 )
 
@@ -270,7 +271,55 @@ type renderOpts struct {
 	ignoreUnset       bool
 }
 
+func expandDirectories(templateFiles []string, userSupplied bool) ([]string, error) {
+	var templates []string
+
+	extensions := sort.StringSlice{".yaml", ".yml", ".json"}
+	extensionCount := len(extensions)
+	sort.Strings(extensions)
+
+	for _, filename := range templateFiles {
+		fileInfo, err := os.Lstat(filename)
+		if err != nil {
+			return nil, err
+		}
+
+		if !fileInfo.Mode().IsDir() {
+			ext := filepath.Ext(filename)
+			idx := extensions.Search(ext)
+			if userSupplied || idx < extensionCount && extensions[idx] == ext {
+				templates = append(templates, filename)
+			}
+			continue
+		}
+
+		subfiles, err := ioutil.ReadDir(filename)
+		if err != nil {
+			return nil, err
+		}
+
+		var files []string
+		for _, file := range subfiles {
+			full := filepath.Join(filename, file.Name())
+			files = append(files, full)
+		}
+
+		files, err = expandDirectories(files, false)
+		if err != nil {
+			return nil, err
+		}
+
+		templates = append(templates, files...)
+	}
+
+	return templates, nil
+}
+
 func render(templateFiles []string, data map[string]interface{}, opts renderOpts) ([]byte, error) {
+	templateFiles, err := expandDirectories(templateFiles, true)
+	if err != nil {
+		return nil, err
+	}
 	objs, err := renderTemplates(templateFiles, data, opts)
 	if err != nil {
 		return nil, err

diff --git a/kubetpl_test.go b/kubetpl_test.go
@@ -36,6 +36,21 @@ func TestRender(t *testing.T) {
 	}
 }
 
+func TestRenderDirectory(t *testing.T) {
+	cfg := map[string]interface{}{
+		"NAME":    "nm",
+		"MESSAGE": "msg",
+	}
+	opts := renderOpts{}
+	renderedSh, err := render([]string{"example/directory"}, cfg, opts)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if len(renderedSh) == 0 {
+		t.Fatal("len(rendered) == 0")
+	}
+}
+
 func TestRenderWithDataFromFile(t *testing.T) {
 	// todo: test secret ("data" must be base64-encoded)
 	src := []string{"example/nginx-with-data-from-file.yml"}