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109 lines
2.5 KiB
109 lines
2.5 KiB
/*
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Copyright The Helm Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package action
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import (
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"fmt"
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"strings"
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"github.com/ghodss/yaml"
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"helm.sh/helm/pkg/chart"
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"helm.sh/helm/pkg/chart/loader"
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)
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type ShowOutputFormat string
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const (
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ShowAll ShowOutputFormat = "all"
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ShowChart ShowOutputFormat = "chart"
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ShowValues ShowOutputFormat = "values"
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ShowReadme ShowOutputFormat = "readme"
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)
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var readmeFileNames = []string{"readme.md", "readme.txt", "readme"}
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func (o ShowOutputFormat) String() string {
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return string(o)
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}
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// Show is the action for checking a given release's information.
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//
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// It provides the implementation of 'helm show' and its respective subcommands.
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type Show struct {
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OutputFormat ShowOutputFormat
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ChartPathOptions
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}
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// NewShow creates a new Show object with the given configuration.
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func NewShow(output ShowOutputFormat) *Show {
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return &Show{
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OutputFormat: output,
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}
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}
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// Run executes 'helm show' against the given release.
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func (s *Show) Run(chartpath string) (string, error) {
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var out strings.Builder
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chrt, err := loader.Load(chartpath)
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if err != nil {
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return "", err
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}
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cf, err := yaml.Marshal(chrt.Metadata)
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if err != nil {
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return "", err
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}
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if s.OutputFormat == ShowChart || s.OutputFormat == ShowAll {
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fmt.Fprintf(&out, "%s\n", cf)
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}
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if (s.OutputFormat == ShowValues || s.OutputFormat == ShowAll) && chrt.Values != nil {
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if s.OutputFormat == ShowAll {
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fmt.Fprintln(&out, "---")
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}
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b, err := yaml.Marshal(chrt.Values)
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if err != nil {
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return "", err
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}
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fmt.Fprintf(&out, "%s\n", b)
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}
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if s.OutputFormat == ShowReadme || s.OutputFormat == ShowAll {
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if s.OutputFormat == ShowAll {
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fmt.Fprintln(&out, "---")
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}
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readme := findReadme(chrt.Files)
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if readme == nil {
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return out.String(), nil
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}
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fmt.Fprintf(&out, "%s\n", readme.Data)
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}
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return out.String(), nil
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}
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func findReadme(files []*chart.File) (file *chart.File) {
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for _, file := range files {
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for _, n := range readmeFileNames {
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if strings.EqualFold(file.Name, n) {
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return file
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}
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}
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}
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return nil
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}
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