/
deckhouse_releases.go
139 lines (120 loc) · 4.57 KB
/
deckhouse_releases.go
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// Copyright 2024 Flant JSC
// 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 mirror
import (
"bytes"
"fmt"
"io"
"os"
"path/filepath"
"github.com/Masterminds/semver/v3"
v1 "github.com/google/go-containerregistry/pkg/v1"
"github.com/google/go-containerregistry/pkg/v1/layout"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"sigs.k8s.io/yaml"
"github.com/deckhouse/deckhouse/dhctl/pkg/apis/v1alpha1"
)
func GenerateDeckhouseReleaseManifests(
versionsToMirror []semver.Version,
pathToManifestYaml string,
releaseChannelsImagesLayout layout.Path,
) error {
// It feels like most of the time manifests yaml length would not exceed the size of 4 KiB buffer,
// so let's preallocate that ahead of time to avoid reallocs.
// I have no scientific reasoning to back this up.
manifests := &bytes.Buffer{}
manifests.Grow(4 * 1024)
for _, version := range versionsToMirror {
versionReleaseImage, err := getImageFromLayoutByTag(releaseChannelsImagesLayout, "v"+version.String())
releaseData, err := extractReleaseInfoForDeckhouseRelease(versionReleaseImage)
if err != nil {
return fmt.Errorf("Build manifest for version %q: %w", version, err)
}
releaseManifest, err := generateDeckhouseRelease(version, releaseData)
if err != nil {
return fmt.Errorf("Build manifest for version %q: %w", version, err)
}
manifests.Write(releaseManifest)
}
if err := os.MkdirAll(filepath.Dir(pathToManifestYaml), 0775); err != nil {
return fmt.Errorf("Create DeckhouseReleases manifest file: %w", err)
}
manifestFile, err := os.Create(pathToManifestYaml)
if err != nil {
return fmt.Errorf("Create DeckhouseReleases manifest file: %w", err)
}
if _, err = io.Copy(manifestFile, manifests); err != nil {
return fmt.Errorf("Write DeckhouseReleases manifest file: %w", err)
}
if err = manifestFile.Sync(); err != nil {
return fmt.Errorf("Write DeckhouseReleases manifest file: %w", err)
}
if err = manifestFile.Close(); err != nil {
return fmt.Errorf("Write DeckhouseReleases manifest file: %w", err)
}
return nil
}
func generateDeckhouseRelease(version semver.Version, releaseInfo *releaseInfo) ([]byte, error) {
const githubReleaseChangelogLinkBase = "https://github.com/deckhouse/deckhouse/releases/tag"
versionTag := "v" + version.String()
var disruptions []string
if len(releaseInfo.Disruptions) > 0 {
disruptionsVersion := fmt.Sprintf("%d.%d", version.Major(), version.Minor())
disruptions = releaseInfo.Disruptions[disruptionsVersion]
}
manifest, err := yaml.Marshal(&v1alpha1.DeckhouseRelease{
TypeMeta: metav1.TypeMeta{
Kind: "DeckhouseRelease",
APIVersion: "deckhouse.io/v1alpha1",
},
ObjectMeta: metav1.ObjectMeta{
Name: versionTag,
},
Spec: v1alpha1.DeckhouseReleaseSpec{
Version: versionTag,
Requirements: releaseInfo.Requirements,
Disruptions: disruptions,
Changelog: releaseInfo.Changelog,
ChangelogLink: fmt.Sprintf("%s/%s", githubReleaseChangelogLinkBase, versionTag),
},
})
if err != nil {
return nil, fmt.Errorf("Marshal DeckhouseRelease: %w", err)
}
return append([]byte("---\n"), manifest...), nil
}
type releaseInfo struct {
Changelog map[string]any `yaml:"-"`
Disruptions map[string][]string `yaml:"disruptions"`
Requirements map[string]string `yaml:"requirements"`
}
func extractReleaseInfoForDeckhouseRelease(versionReleaseImage v1.Image) (*releaseInfo, error) {
rawChangelog, err := readFileFromImage(versionReleaseImage, "changelog.yaml")
if err != nil {
return nil, fmt.Errorf("Extract changelog from release image: %w", err)
}
rawReleaseData, err := readFileFromImage(versionReleaseImage, "version.json")
if err != nil {
return nil, fmt.Errorf("Extract release data from release image: %w", err)
}
release := &releaseInfo{
Changelog: make(map[string]any),
}
if err = yaml.Unmarshal(rawReleaseData.Bytes(), release); err != nil {
return nil, fmt.Errorf("Extract release data from release image: %w", err)
}
if err = yaml.Unmarshal(rawChangelog.Bytes(), &release.Changelog); err != nil {
return nil, fmt.Errorf("Extract release data from release image: %w", err)
}
return release, nil
}