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