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write.go
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write.go
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package base
import (
"fmt"
"io/ioutil"
"os"
"path"
"path/filepath"
"strings"
"github.com/pkg/errors"
"github.com/replicatedhq/kots/pkg/k8sutil"
"github.com/replicatedhq/kots/pkg/util"
"gopkg.in/yaml.v2"
kustomizetypes "sigs.k8s.io/kustomize/api/types"
)
type WriteOptions struct {
BaseDir string
SkippedDir string
Overwrite bool
ExcludeKotsKinds bool
IsHelmBase bool
}
func (b *Base) WriteBase(options WriteOptions) error {
renderDir := filepath.Join(options.BaseDir, b.Path)
_, err := os.Stat(renderDir)
if err == nil {
if options.Overwrite {
if err := os.RemoveAll(renderDir); err != nil {
return errors.Wrap(err, "failed to remove previous content in base")
}
} else {
return fmt.Errorf("directory %s already exists", renderDir)
}
}
if _, _, err := b.writeBase(options, true); err != nil {
return errors.Wrap(err, "failed to write root base")
}
if err := b.writeSkippedFiles(options); err != nil {
return errors.Wrap(err, "failed to write skipped files")
}
return nil
}
func (b *Base) writeBase(options WriteOptions, isTopLevelBase bool) ([]string, []kustomizetypes.PatchStrategicMerge, error) {
renderDir := filepath.Join(options.BaseDir, b.Path)
if _, err := os.Stat(renderDir); os.IsNotExist(err) {
if err := os.MkdirAll(renderDir, 0744); err != nil {
return nil, nil, errors.Wrap(err, "failed to mkdir for base root")
}
}
resources, patches, err := deduplicateOnContent(b.Files, options.ExcludeKotsKinds, b.Namespace)
if err != nil {
return nil, nil, errors.Wrap(err, "failed to deduplicate content")
}
kustomizeResources := []string{}
kustomizePatches := []kustomizetypes.PatchStrategicMerge{}
kustomizeBases := []string{}
for _, file := range resources {
fileRenderPath := filepath.Join(renderDir, file.Path)
d, _ := path.Split(fileRenderPath)
if _, err := os.Stat(d); os.IsNotExist(err) {
if err := os.MkdirAll(d, 0744); err != nil {
return nil, nil, errors.Wrap(err, "failed to mkdir")
}
}
if err := ioutil.WriteFile(fileRenderPath, file.Content, 0644); err != nil {
return nil, nil, errors.Wrap(err, "failed to write base file")
}
kustomizeResources = append(kustomizeResources, path.Join(".", file.Path))
}
for _, file := range patches {
fileRenderPath := filepath.Join(renderDir, file.Path)
d, _ := path.Split(fileRenderPath)
if _, err := os.Stat(d); os.IsNotExist(err) {
if err := os.MkdirAll(d, 0744); err != nil {
return nil, nil, errors.Wrap(err, "failed to mkdir")
}
}
if err := ioutil.WriteFile(fileRenderPath, file.Content, 0644); err != nil {
return nil, nil, errors.Wrap(err, "failed to write base file")
}
kustomizePatches = append(kustomizePatches, kustomizetypes.PatchStrategicMerge(path.Join(".", file.Path)))
}
// Additional files are not included in the kustomization.yaml
for _, file := range b.AdditionalFiles {
fileRenderPath := filepath.Join(renderDir, file.Path)
d, _ := path.Split(fileRenderPath)
if _, err := os.Stat(d); os.IsNotExist(err) {
if err := os.MkdirAll(d, 0744); err != nil {
return nil, nil, errors.Wrap(err, "failed to mkdir")
}
}
if err := ioutil.WriteFile(fileRenderPath, file.Content, 0644); err != nil {
return nil, nil, errors.Wrap(err, "failed to write additional file")
}
}
subResources := []string{}
subPatches := []kustomizetypes.PatchStrategicMerge{}
for _, base := range b.Bases {
if base.Path == "" {
return nil, nil, errors.New("kustomize sub-base path cannot be empty")
}
options := WriteOptions{
BaseDir: filepath.Join(options.BaseDir, b.Path),
Overwrite: options.Overwrite,
ExcludeKotsKinds: options.ExcludeKotsKinds,
}
baseResources, basePatches, err := base.writeBase(options, false)
if err != nil {
return nil, nil, errors.Wrapf(err, "failed to render base %s", base.Path)
}
if base.Namespace == "" {
for _, r := range baseResources {
subResources = append(subResources, filepath.Join(base.Path, r))
}
for _, p := range basePatches {
subPatches = append(subPatches, kustomizetypes.PatchStrategicMerge(filepath.Join(base.Path, string(p))))
}
} else {
kustomizeBases = append(kustomizeBases, base.Path)
}
}
kustomization := kustomizetypes.Kustomization{
TypeMeta: kustomizetypes.TypeMeta{
APIVersion: "kustomize.config.k8s.io/v1beta1",
Kind: "Kustomization",
},
Namespace: b.Namespace,
Resources: kustomizeResources,
PatchesStrategicMerge: kustomizePatches,
Bases: kustomizeBases,
}
if isTopLevelBase && !options.IsHelmBase {
// For the top level base, the one that isn't a helm chart), "bases" should contain all charts that are deployed to different namespaces.
// "resources" will then be deduplicated and split into "resources" and "patches", where patches will contain duplicate resources.
// This is done for backwards compatibility with apps that include duplicate resources in different bases.
resources, patches, err := deduplicateResources(append(kustomization.Resources, subResources...), options.BaseDir, options.ExcludeKotsKinds, b.Namespace)
if err != nil {
return nil, nil, errors.Wrapf(err, "failed to defuplicate top level kustomize")
}
kustomization.Resources = resources
kustomization.PatchesStrategicMerge = append(kustomization.PatchesStrategicMerge, patches...)
}
if err := k8sutil.WriteKustomizationToFile(kustomization, filepath.Join(renderDir, "kustomization.yaml")); err != nil {
return nil, nil, errors.Wrap(err, "failed to write kustomization to file")
}
kustomizeResources = append(kustomizeResources, subResources...)
kustomizePatches = append(kustomizePatches, subPatches...)
return kustomizeResources, kustomizePatches, nil
}
type SkippedFilesIndex struct {
SkippedFiles []SkippedFile `yaml:"skippedFiles"`
}
type SkippedFile struct {
Path string `yaml:"path"`
Reason string `yaml:"reason"`
}
func (b *Base) writeSkippedFiles(options WriteOptions) error {
// if we dont render this dir we will get an error when we create the archive
renderDir := filepath.Join(options.SkippedDir, b.Path)
_, err := os.Stat(renderDir)
if err == nil {
if options.Overwrite {
if err := os.RemoveAll(renderDir); err != nil {
return errors.Wrap(err, "failed to remove previous content in skipped files")
}
} else {
return fmt.Errorf("directory %s already exists", renderDir)
}
}
if _, err := os.Stat(renderDir); os.IsNotExist(err) {
if err := os.MkdirAll(renderDir, 0744); err != nil {
return errors.Wrap(err, "failed to mkdir for skipped files root")
}
}
errorFiles := b.getErrorFiles()
if len(errorFiles) == 0 {
return nil
}
index := SkippedFilesIndex{SkippedFiles: []SkippedFile{}}
for _, file := range errorFiles {
fileRenderPath := filepath.Join(renderDir, file.Path)
d := path.Dir(fileRenderPath)
if _, err := os.Stat(d); os.IsNotExist(err) {
if err := os.MkdirAll(d, 0744); err != nil {
return errors.Wrap(err, "failed to mkdir")
}
}
if err := ioutil.WriteFile(fileRenderPath, file.Content, 0644); err != nil {
return errors.Wrapf(err, "failed to write skipped file %s", fileRenderPath)
}
index.SkippedFiles = append(index.SkippedFiles, SkippedFile{
Path: file.Path,
Reason: fmt.Sprintf("%v", file.Error),
})
}
indexOut, err := yaml.Marshal(index)
if err != nil {
return errors.Wrap(err, "failed to marshal skipped files index")
}
fileRenderPath := filepath.Join(renderDir, "_index.yaml")
if err := ioutil.WriteFile(fileRenderPath, indexOut, 0644); err != nil {
return errors.Wrap(err, "failed to write skipped files index")
}
return nil
}
func (b *Base) getErrorFiles() []BaseFile {
errorFiles := b.ErrorFiles
for _, base := range b.Bases {
baseErrorFiles := []BaseFile{}
for _, errorFile := range base.getErrorFiles() {
baseErrorFiles = append(baseErrorFiles, BaseFile{
Path: path.Join(base.Path, errorFile.Path),
Content: errorFile.Content,
Error: errorFile.Error,
})
}
errorFiles = append(errorFiles, baseErrorFiles...)
}
return errorFiles
}
func deduplicateResources(filePaths []string, baseDir string, excludeKotsKinds bool, baseNS string) ([]string, []kustomizetypes.PatchStrategicMerge, error) {
files := []BaseFile{}
for _, filePath := range filePaths {
content, err := ioutil.ReadFile(filepath.Join(baseDir, filePath))
if err != nil {
return nil, nil, errors.Wrapf(err, "failed to read base file %s", filePath)
}
files = append(files, BaseFile{Path: filePath, Content: content})
}
resourcesFiles, patchFiles, err := deduplicateOnContent(files, excludeKotsKinds, baseNS)
if err != nil {
return nil, nil, errors.Wrapf(err, "failed to deduplicate base file")
}
resources := []string{}
for _, f := range resourcesFiles {
resources = append(resources, f.Path)
}
patches := []kustomizetypes.PatchStrategicMerge{}
for _, f := range patchFiles {
patches = append(patches, kustomizetypes.PatchStrategicMerge(f.Path))
}
return resources, patches, nil
}
func deduplicateOnContent(files []BaseFile, excludeKotsKinds bool, baseNS string) ([]BaseFile, []BaseFile, error) {
resources := []BaseFile{}
patches := []BaseFile{}
foundGVKNamesMap := map[string]bool{}
singleDocs := convertToSingleDocBaseFiles(files)
for _, file := range singleDocs {
writeToKustomization, err := file.ShouldBeIncludedInBaseKustomization(excludeKotsKinds)
if err != nil {
// should we do anything with errors here?
if _, ok := err.(ParseError); !ok {
return nil, nil, errors.Wrap(err, "failed to check if file should be included")
}
}
if writeToKustomization {
thisGVKName, _ := GetGVKWithNameAndNs(file.Content, baseNS)
found := foundGVKNamesMap[thisGVKName]
if !found || thisGVKName == "" {
resources = append(resources, file)
foundGVKNamesMap[thisGVKName] = true
} else {
patches = append(patches, file)
}
}
}
return resources, patches, nil
}
func convertToSingleDocBaseFiles(files []BaseFile) []BaseFile {
singleDocs := []BaseFile{}
for _, file := range files {
docs := util.ConvertToSingleDocs(file.Content)
// This is here so as not to change previous behavior
if len(docs) == 0 {
singleDocs = append(singleDocs, BaseFile{
Path: file.Path,
Content: []byte(""),
})
continue
}
for idx, doc := range docs {
filename := file.Path
if idx > 0 {
filename = strings.TrimSuffix(file.Path, filepath.Ext(file.Path))
filename = fmt.Sprintf("%s-%d%s", filename, idx+1, filepath.Ext(file.Path))
}
baseFile := BaseFile{
Path: filename,
Content: doc,
}
singleDocs = append(singleDocs, baseFile)
}
}
return singleDocs
}
func (b *Base) GetOverlaysDir(options WriteOptions) string {
renderDir := options.BaseDir
return filepath.Join(renderDir, "..", "overlays")
}