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// Copyright 2022 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package helm
import (
"archive/tar"
"compress/gzip"
"io"
"strings"
"code.gitea.io/gitea/modules/util"
"code.gitea.io/gitea/modules/validation"
"github.com/hashicorp/go-version"
"gopkg.in/yaml.v3"
)
var (
// ErrMissingChartFile indicates a missing Chart.yaml file
ErrMissingChartFile = util.NewInvalidArgumentErrorf("Chart.yaml file is missing")
// ErrInvalidName indicates an invalid package name
ErrInvalidName = util.NewInvalidArgumentErrorf("package name is invalid")
// ErrInvalidVersion indicates an invalid package version
ErrInvalidVersion = util.NewInvalidArgumentErrorf("package version is invalid")
// ErrInvalidChart indicates an invalid chart
ErrInvalidChart = util.NewInvalidArgumentErrorf("chart is invalid")
)
// Metadata for a Chart file. This models the structure of a Chart.yaml file.
type Metadata struct {
APIVersion string `json:"api_version" yaml:"apiVersion"`
Type string `json:"type,omitempty" yaml:"type,omitempty"`
Name string `json:"name" yaml:"name"`
Version string `json:"version" yaml:"version"`
AppVersion string `json:"app_version,omitempty" yaml:"appVersion,omitempty"`
Home string `json:"home,omitempty" yaml:"home,omitempty"`
Sources []string `json:"sources,omitempty" yaml:"sources,omitempty"`
Description string `json:"description,omitempty" yaml:"description,omitempty"`
Keywords []string `json:"keywords,omitempty" yaml:"keywords,omitempty"`
Maintainers []*Maintainer `json:"maintainers,omitempty" yaml:"maintainers,omitempty"`
Icon string `json:"icon,omitempty" yaml:"icon,omitempty"`
Condition string `json:"condition,omitempty" yaml:"condition,omitempty"`
Tags string `json:"tags,omitempty" yaml:"tags,omitempty"`
Deprecated bool `json:"deprecated,omitempty" yaml:"deprecated,omitempty"`
Annotations map[string]string `json:"annotations,omitempty" yaml:"annotations,omitempty"`
KubeVersion string `json:"kube_version,omitempty" yaml:"kubeVersion,omitempty"`
Dependencies []*Dependency `json:"dependencies,omitempty" yaml:"dependencies,omitempty"`
}
type Maintainer struct {
Name string `json:"name,omitempty" yaml:"name,omitempty"`
Email string `json:"email,omitempty" yaml:"email,omitempty"`
URL string `json:"url,omitempty" yaml:"url,omitempty"`
}
type Dependency struct {
Name string `json:"name" yaml:"name"`
Version string `json:"version,omitempty" yaml:"version,omitempty"`
Repository string `json:"repository" yaml:"repository"`
Condition string `json:"condition,omitempty" yaml:"condition,omitempty"`
Tags []string `json:"tags,omitempty" yaml:"tags,omitempty"`
Enabled bool `json:"enabled,omitempty" yaml:"enabled,omitempty"`
ImportValues []any `json:"import_values,omitempty" yaml:"import-values,omitempty"`
Alias string `json:"alias,omitempty" yaml:"alias,omitempty"`
}
// ParseChartArchive parses the metadata of a Helm archive
func ParseChartArchive(r io.Reader) (*Metadata, error) {
gzr, err := gzip.NewReader(r)
if err != nil {
return nil, err
}
defer gzr.Close()
tr := tar.NewReader(gzr)
for {
hd, err := tr.Next()
if err == io.EOF {
break
}
if err != nil {
return nil, err
}
if hd.Typeflag != tar.TypeReg {
continue
}
if hd.FileInfo().Name() == "Chart.yaml" {
if strings.Count(hd.Name, "/") != 1 {
continue
}
return ParseChartFile(tr)
}
}
return nil, ErrMissingChartFile
}
// ParseChartFile parses a Chart.yaml file to retrieve the metadata of a Helm chart
func ParseChartFile(r io.Reader) (*Metadata, error) {
var metadata *Metadata
if err := yaml.NewDecoder(r).Decode(&metadata); err != nil {
return nil, err
}
if metadata.APIVersion == "" {
return nil, ErrInvalidChart
}
if metadata.Type != "" && metadata.Type != "application" && metadata.Type != "library" {
return nil, ErrInvalidChart
}
if metadata.Name == "" {
return nil, ErrInvalidName
}
if _, err := version.NewSemver(metadata.Version); err != nil {
return nil, ErrInvalidVersion
}
if !validation.IsValidURL(metadata.Home) {
metadata.Home = ""
}
return metadata, nil
}
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