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traverse.go
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traverse.go
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package manager
import (
"fmt"
"strings"
"github.com/rancher/rancher/pkg/catalog/helm"
"github.com/rancher/types/apis/management.cattle.io/v3"
"github.com/sirupsen/logrus"
"gopkg.in/yaml.v2"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
)
func traverseFiles(repoPath string, catalog *v3.Catalog) ([]v3.Template, []string, map[string]v3.VersionCommits, []error, error) {
logrus.Info("traversing files and generating templates")
index, err := helm.LoadIndex(repoPath)
if err != nil {
return nil, nil, nil, nil, err
}
newHelmVersionCommits := map[string]v3.VersionCommits{}
var templates []v3.Template
var errors []error
for chart, metadata := range index.IndexFile.Entries {
newHelmVersionCommits[chart] = v3.VersionCommits{
Value: map[string]string{},
}
existingHelmVersionCommits := map[string]string{}
if catalog.Status.HelmVersionCommits[chart].Value != nil {
existingHelmVersionCommits = catalog.Status.HelmVersionCommits[chart].Value
}
keywords := map[string]struct{}{}
// comparing version commit with the previous commit to detect if a template has been changed.
hasChanged := false
versionNumber := 0
for _, version := range metadata {
newHelmVersionCommits[chart].Value[version.Version] = version.Digest
digest, ok := existingHelmVersionCommits[version.Version]
if !ok || digest != version.Digest {
hasChanged = true
}
if ok {
versionNumber++
}
}
// if there is a version getting deleted then also set hasChanged to true
if versionNumber != len(existingHelmVersionCommits) {
hasChanged = true
}
if !hasChanged {
logrus.Debugf("chart %s has not been changed. Skipping generating templates for it", chart)
continue
}
template := v3.Template{
ObjectMeta: metav1.ObjectMeta{
Name: chart,
},
}
template.Spec.Description = metadata[0].Description
template.Spec.DefaultVersion = metadata[0].Version
if len(metadata[0].Sources) > 0 {
template.Spec.ProjectURL = metadata[0].Sources[0]
}
iconData, iconFilename, err := helm.Icon(metadata)
if err != nil {
errors = append(errors, err)
}
template.Spec.Icon = iconData
template.Spec.IconFilename = iconFilename
template.Spec.FolderName = chart
template.Spec.DisplayName = chart
var versions []v3.TemplateVersionSpec
for _, version := range metadata {
v := v3.TemplateVersionSpec{
Version: version.Version,
}
files, err := helm.FetchFiles(version, version.URLs)
if err != nil {
errors = append(errors, err)
continue
}
filesToAdd := make(map[string]string)
for _, file := range files {
if strings.EqualFold(fmt.Sprintf("%s/%s", chart, "readme.md"), file.Name) {
v.Readme = file.Contents
}
for _, f := range supportedFiles {
if strings.EqualFold(fmt.Sprintf("%s/%s", chart, f), file.Name) {
var value catalogYml
if err := yaml.Unmarshal([]byte(file.Contents), &value); err != nil {
return nil, nil, nil, nil, err
}
v.Questions = value.Questions
v.RancherVersion = value.RancherVersion
for _, category := range value.Categories {
keywords[category] = struct{}{}
}
break
}
}
if strings.EqualFold(fmt.Sprintf("%s/%s", chart, "app-readme.md"), file.Name) {
v.AppReadme = file.Contents
}
filesToAdd[file.Name] = file.Contents
}
v.Files = filesToAdd
v.KubeVersion = version.KubeVersion
v.Digest = version.Digest
v.UpgradeVersionLinks = map[string]string{}
for _, versionSpec := range template.Spec.Versions {
if showUpgradeLinks(v.Version, versionSpec.Version) {
version := versionSpec.Version
v.UpgradeVersionLinks[versionSpec.Version] = fmt.Sprintf("%s-%s", template.Name, version)
}
}
v.ExternalID = fmt.Sprintf("catalog://?catalog=%s&template=%s&version=%s", catalog.Name, template.Spec.FolderName, v.Version)
versions = append(versions, v)
}
var categories []string
for k := range keywords {
categories = append(categories, k)
}
template.Spec.Categories = categories
template.Spec.Versions = versions
template.Spec.CatalogID = catalog.Name
template.Name = fmt.Sprintf("%s-%s", catalog.Name, template.Spec.FolderName)
templates = append(templates, template)
}
toDeleteChart := []string{}
for chart := range catalog.Status.HelmVersionCommits {
if _, ok := index.IndexFile.Entries[chart]; !ok {
toDeleteChart = append(toDeleteChart, fmt.Sprintf("%s-%s", catalog.Name, chart))
}
}
return templates, toDeleteChart, newHelmVersionCommits, nil, nil
}
var supportedFiles = []string{"catalog.yml", "catalog.yaml", "questions.yml", "questions.yaml"}
type catalogYml struct {
RancherVersion string `yaml:"rancher_version,omitempty"`
Categories []string `yaml:"categories,omitempty"`
Questions []v3.Question `yaml:"questions,omitempty"`
}