add builtin envfiles plugin

k8sdeps/configmapandsecret/basefactory_test.go

@@ -103,6 +103,22 @@ func TestKeyValuesFromPlugins(t *testing.T) {
 				},
 			},
 		},
+		{
+			description: "Create kv.Pairs from builtin envfiles plugin",
+			sources: []types.KVSource{
+				{
+					PluginType: "builtin",
+					Name:       "envfiles",
+					Args:       []string{"files/app-init.ini"},
+				},
+			},
+			expected: []kv.Pair{
+				{
+					Key:   "FOO",
+					Value: "bar",
+				},
+			},
+		},
 	}
 
 	fSys := fs.MakeFakeFS()

k8sdeps/kv/plugin/builtin/envfiles.go

@@ -0,0 +1,49 @@
+/*
+Copyright 2019 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package builtin
+
+import (
+	"sigs.k8s.io/kustomize/k8sdeps/kv"
+	"sigs.k8s.io/kustomize/pkg/ifc"
+)
+
+// Envfiles format should be a path to a file to read lines of key=val
+// pairs to create a configmap.
+// i.e. a Docker .env file or a .ini file.
+type Envfiles struct {
+	Ldr ifc.Loader
+}
+
+// Get implements the interface for kv plugins.
+func (p Envfiles) Get(root string, args []string) ([]kv.Pair, error) {
+	var all []kv.Pair
+	for _, path := range args {
+		if path == "" {
+			return nil, nil
+		}
+		content, err := p.Ldr.Load(path)
+		if err != nil {
+			return nil, err
+		}
+		kvs, err := kv.KeyValuesFromLines(content)
+		if err != nil {
+			return nil, err
+		}
+		all = append(all, kvs...)
+	}
+	return all, nil
+}

k8sdeps/kv/plugin/builtinplugin.go

@@ -34,6 +34,7 @@ func newBuiltinFactory(ldr ifc.Loader) *builtinFactory {
 		plugins: map[string]KVSource{
 			"literals": builtin.Literals{},
 			"files":    builtin.Files{Ldr: ldr},
+			"envfiles": builtin.Envfiles{Ldr: ldr},
 		},
 	}
 }

pkg/target/builtinplugins_test.go

@@ -24,12 +24,14 @@ const result = `
 apiVersion: v1
 data:
   FRUIT: YXBwbGU=
+  MOUNTAIN: ZXZlcmVzdA==
+  OCEAN: cGFjaWZpYw==
   VEGETABLE: Y2Fycm90
   foo.env: Ck1PVU5UQUlOPWV2ZXJlc3QKT0NFQU49cGFjaWZpYwo=
   passphrase: ZGF0IHBocmFzZQ==
 kind: Secret
 metadata:
-  name: bob-t98kdk9767
+  name: bob-kf5c9fccbt
 type: Opaque
 `
 
@@ -57,6 +59,10 @@ secretGenerator:
     args:
     - foo.env
     - passphrase=phrase.dat
+  - pluginType: builtin
+    name: envfiles
+    args:
+    - foo.env
 `)
 	writeDataFiles(th)
 	m, err := th.makeKustTarget().MakeCustomizedResMap()
@@ -80,6 +86,9 @@ secretGenerator:
     args:
     - foo.env
     - passphrase=phrase.dat
+  - name: envfiles
+    args:
+    - foo.env
 `)
 	writeDataFiles(th)
 	m, err := th.makeKustTarget().MakeCustomizedResMap()