Add sourcesecret and kustomization manifestgen

This includes a change to the `sync` generator to make the deploy
secret name configurable.

Signed-off-by: Hidde Beydals <hello@hidde.co>

pkg/manifestgen/kustomization/kustomization.go

@@ -0,0 +1,123 @@
+/*
+Copyright 2021 The Flux 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 kustomization
+
+import (
+	"io/ioutil"
+	"os"
+	"path/filepath"
+
+	"sigs.k8s.io/kustomize/api/k8sdeps/kunstruct"
+	"sigs.k8s.io/kustomize/api/konfig"
+	kustypes "sigs.k8s.io/kustomize/api/types"
+	"sigs.k8s.io/yaml"
+
+	"github.com/fluxcd/flux2/pkg/manifestgen"
+)
+
+func Generate(options Options) (*manifestgen.Manifest, error) {
+	kfile := filepath.Join(options.TargetPath, konfig.DefaultKustomizationFileName())
+	abskfile := filepath.Join(options.BaseDir, kfile)
+
+	scan := func(base string) ([]string, error) {
+		var paths []string
+		uf := kunstruct.NewKunstructuredFactoryImpl()
+		err := options.FileSystem.Walk(base, func(path string, info os.FileInfo, err error) error {
+			if err != nil {
+				return err
+			}
+			if path == base {
+				return nil
+			}
+			if info.IsDir() {
+				// If a sub-directory contains an existing Kustomization file add the
+				// directory as a resource and do not decent into it.
+				for _, kfilename := range konfig.RecognizedKustomizationFileNames() {
+					if options.FileSystem.Exists(filepath.Join(path, kfilename)) {
+						paths = append(paths, path)
+						return filepath.SkipDir
+					}
+				}
+				return nil
+			}
+			fContents, err := options.FileSystem.ReadFile(path)
+			if err != nil {
+				return err
+			}
+			if _, err := uf.SliceFromBytes(fContents); err != nil {
+				return nil
+			}
+			paths = append(paths, path)
+			return nil
+		})
+		return paths, err
+	}
+
+	if _, err := os.Stat(abskfile); err != nil {
+		abs, err := filepath.Abs(filepath.Dir(abskfile))
+		if err != nil {
+			return nil, err
+		}
+
+		files, err := scan(abs)
+		if err != nil {
+			return nil, err
+		}
+
+		f, err := options.FileSystem.Create(abskfile)
+		if err != nil {
+			return nil, err
+		}
+		f.Close()
+
+		kus := kustypes.Kustomization{
+			TypeMeta: kustypes.TypeMeta{
+				APIVersion: kustypes.KustomizationVersion,
+				Kind:       kustypes.KustomizationKind,
+			},
+		}
+
+		var resources []string
+		for _, file := range files {
+			relP, err := filepath.Rel(abs, file)
+			if err != nil {
+				return nil, err
+			}
+			resources = append(resources, relP)
+		}
+
+		kus.Resources = resources
+		kd, err := yaml.Marshal(kus)
+		if err != nil {
+			return nil, err
+		}
+
+		return &manifestgen.Manifest{
+			Path:    kfile,
+			Content: string(kd),
+		}, nil
+	}
+
+	kd, err := ioutil.ReadFile(abskfile)
+	if err != nil {
+		return nil, err
+	}
+	return &manifestgen.Manifest{
+		Path:    kfile,
+		Content: string(kd),
+	}, nil
+}

pkg/manifestgen/kustomization/options.go

@@ -0,0 +1,33 @@
+/*
+Copyright 2021 The Flux 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 kustomization
+
+import "sigs.k8s.io/kustomize/api/filesys"
+
+type Options struct {
+	FileSystem filesys.FileSystem
+	BaseDir    string
+	TargetPath string
+}
+
+func MakeDefaultOptions() Options {
+	return Options{
+		FileSystem: filesys.MakeFsOnDisk(),
+		BaseDir:    "",
+		TargetPath: "",
+	}
+}