/
renderer.go
256 lines (213 loc) · 6.99 KB
/
renderer.go
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package crd
import (
"bytes"
"context"
"encoding/base64"
"fmt"
"io"
"net/http"
"os"
"path/filepath"
"strings"
"github.com/giantswarm/microerror"
"github.com/google/go-github/v39/github"
v1 "k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/v1"
"k8s.io/apimachinery/pkg/runtime/schema"
)
var (
// Kubernetes API group, version and kind for v1 CRDs
crdV1GVK = schema.GroupVersionKind{
Group: "apiextensions.k8s.io",
Version: "v1",
Kind: "CustomResourceDefinition",
}
)
func (r Renderer) patchCRDs(provider string, crds []v1.CustomResourceDefinition) ([]v1.CustomResourceDefinition, error) {
patchedCRDs := make([]v1.CustomResourceDefinition, 0, len(crds))
for _, crd := range crds {
patched, err := patchCRD(provider, r.Patches, crd)
if err != nil {
return nil, microerror.Mask(err)
}
patchedCRDs = append(patchedCRDs, patched)
}
return patchedCRDs, nil
}
// Render creates helm chart templates for the given provider by downloading upstream CRDs, merging them with local
// CRDs, patching them, and writing them to the corresponding provider helm template directory.
func (r Renderer) Render(ctx context.Context, provider string) error {
outputDirectory := filepath.Join(helmChartDirectory(r.OutputDirectory, provider), "templates")
{
localCRDs, err := r.getLocalCRDs(provider)
if err != nil {
return microerror.Mask(err)
}
remoteCRDs, err := r.getRemoteCRDs(ctx, provider)
if err != nil {
return microerror.Mask(err)
}
internalCRDs, err := r.patchCRDs(provider, append(localCRDs, remoteCRDs...))
if err != nil {
return microerror.Mask(err)
}
err = writeCRDsToDirectory(outputDirectory, internalCRDs)
if err != nil {
return microerror.Mask(err)
}
}
{
upstreamCRDs, err := r.getUpstreamCRDs(ctx, provider)
if err != nil {
return microerror.Mask(err)
}
upstreamCRDs, err = r.patchCRDs(provider, upstreamCRDs)
if err != nil {
return microerror.Mask(err)
}
err = writeCRDsToDirectory(outputDirectory, upstreamCRDs)
if err != nil {
return microerror.Mask(err)
}
}
return nil
}
// downloadReleaseAssetCRDs returns a slice of CRDs by downloading the given GitHub release asset, parsing it as YAML,
// and filtering for only CRD objects.
func (r Renderer) downloadReleaseAssetCRDs(ctx context.Context, asset ReleaseAssetFileDefinition) ([]v1.CustomResourceDefinition, error) {
release, _, err := r.GithubClient.Repositories.GetReleaseByTag(ctx, asset.Owner, asset.Repo, asset.Version)
if err != nil {
return nil, microerror.Mask(err)
}
var targetAssets []*github.ReleaseAsset
for _, releaseAsset := range release.Assets {
for _, file := range asset.Files {
if releaseAsset.GetName() == file {
targetAssets = append(targetAssets, releaseAsset)
}
}
}
if targetAssets == nil {
return nil, notFoundError
}
var allCrds []v1.CustomResourceDefinition
for _, targetAsset := range targetAssets {
contentReader, _, err := r.GithubClient.Repositories.DownloadReleaseAsset(ctx, asset.Owner, asset.Repo, targetAsset.GetID(), http.DefaultClient)
if err != nil {
return nil, microerror.Mask(err)
}
crds, err := decodeCRDs(contentReader)
if err != nil {
return nil, microerror.Mask(err)
}
allCrds = append(allCrds, crds...)
}
return allCrds, nil
}
// getUpstreamCRDs returns all upstream CRDs for a provider based on the Renderer's upstream asset configuration.
func (r Renderer) getUpstreamCRDs(ctx context.Context, provider string) ([]v1.CustomResourceDefinition, error) {
var crds []v1.CustomResourceDefinition
for _, releaseAsset := range r.UpstreamAssets {
if releaseAsset.Provider != provider {
continue
}
releaseAssetCRDs, err := r.downloadReleaseAssetCRDs(ctx, releaseAsset)
if err != nil {
return nil, microerror.Mask(err)
}
crds = append(crds, releaseAssetCRDs...)
}
return crds, nil
}
// getLocalCRDs reads the configured local directory and returns a slice of CRDs that have the given category.
func (r Renderer) getLocalCRDs(category string) ([]v1.CustomResourceDefinition, error) {
var crds []v1.CustomResourceDefinition
err := filepath.WalkDir(r.LocalCRDDirectory, func(path string, entry os.DirEntry, walkErr error) error {
if walkErr != nil {
return microerror.Mask(walkErr)
}
if entry.IsDir() {
return nil
}
file, err := os.Open(path)
if err != nil {
return microerror.Mask(err)
}
fileCRDs, err := decodeCRDs(file)
if err != nil {
return microerror.Mask(err)
}
for _, crd := range fileCRDs {
if contains(crd.Spec.Names.Categories, category) {
crds = append(crds, crd)
}
}
return nil
})
if err != nil {
return nil, microerror.Mask(err)
}
return crds, nil
}
// getRemoteCRDs returns all remote CRDs for a provider based on the Renderer's remote repository configuration.
func (r Renderer) getRemoteCRDs(ctx context.Context, provider string) ([]v1.CustomResourceDefinition, error) {
var crds []v1.CustomResourceDefinition
for _, releaseAsset := range r.RemoteRepositories {
if releaseAsset.Provider != provider {
continue
}
remoteCRDs, err := r.downloadRepositoryCRDs(ctx, releaseAsset)
if err != nil {
return nil, microerror.Mask(err)
}
crds = append(crds, remoteCRDs...)
}
return crds, nil
}
// downloadRepositoryCRDs returns a slice of CRDs by downloading the given GitHub repository tree, listing files in the
// given path, parsing them as YAML, and filtering for only CRD objects.
func (r Renderer) downloadRepositoryCRDs(ctx context.Context, repo RemoteRepositoryDefinition) ([]v1.CustomResourceDefinition, error) {
refString := fmt.Sprintf("tags/%s", repo.Reference)
ref, response, err := r.GithubClient.Git.GetRef(ctx, repo.Owner, repo.Name, refString)
if err != nil && response.StatusCode == 404 {
refString = fmt.Sprintf("heads/%s", repo.Reference)
ref, _, err = r.GithubClient.Git.GetRef(ctx, repo.Owner, repo.Name, refString)
}
if err != nil {
return nil, microerror.Mask(err)
}
commit, _, err := r.GithubClient.Git.GetCommit(ctx, repo.Owner, repo.Name, ref.Object.GetSHA())
if err != nil {
return nil, microerror.Mask(err)
}
tree, _, err := r.GithubClient.Git.GetTree(ctx, repo.Owner, repo.Name, commit.Tree.GetSHA(), true)
if err != nil {
return nil, microerror.Mask(err)
}
var targetEntries []*github.TreeEntry
for _, entry := range tree.Entries {
if entry.GetType() == "blob" && strings.HasPrefix(entry.GetPath(), repo.Path) {
targetEntries = append(targetEntries, entry)
}
}
if targetEntries == nil {
return nil, notFoundError
}
var allCrds []v1.CustomResourceDefinition
for _, entry := range targetEntries {
blob, _, err := r.GithubClient.Git.GetBlob(ctx, repo.Owner, repo.Name, entry.GetSHA())
if err != nil {
return nil, microerror.Mask(err)
}
content, err := base64.StdEncoding.DecodeString(blob.GetContent())
if err != nil {
return nil, microerror.Mask(err)
}
contentReader := io.NopCloser(bytes.NewReader(content))
crds, err := decodeCRDs(contentReader)
if err != nil {
return nil, microerror.Mask(err)
}
allCrds = append(allCrds, crds...)
}
return allCrds, nil
}