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chartutil was originally created to operate on protobufs which are no longer part of Helm. The util package makes more sense to be part of the chart package. This change is part of the HIP 20 to create v3 charts and explicitly call out v2 charts. The changes for this are in smaller bite size changes. Signed-off-by: Matt Farina <matt.farina@suse.com>
92 lines
2.6 KiB
Go
92 lines
2.6 KiB
Go
/*
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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 util
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import (
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"os"
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"path/filepath"
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"github.com/pkg/errors"
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"sigs.k8s.io/yaml"
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"helm.sh/helm/v4/pkg/chart"
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)
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// LoadChartfile loads a Chart.yaml file into a *chart.Metadata.
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func LoadChartfile(filename string) (*chart.Metadata, error) {
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b, err := os.ReadFile(filename)
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if err != nil {
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return nil, err
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}
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y := new(chart.Metadata)
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err = yaml.Unmarshal(b, y)
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return y, err
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}
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// SaveChartfile saves the given metadata as a Chart.yaml file at the given path.
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//
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// 'filename' should be the complete path and filename ('foo/Chart.yaml')
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func SaveChartfile(filename string, cf *chart.Metadata) error {
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// Pull out the dependencies of a v1 Chart, since there's no way
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// to tell the serializer to skip a field for just this use case
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savedDependencies := cf.Dependencies
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if cf.APIVersion == chart.APIVersionV1 {
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cf.Dependencies = nil
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}
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out, err := yaml.Marshal(cf)
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if cf.APIVersion == chart.APIVersionV1 {
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cf.Dependencies = savedDependencies
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}
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if err != nil {
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return err
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}
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return os.WriteFile(filename, out, 0644)
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}
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// IsChartDir validate a chart directory.
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//
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// Checks for a valid Chart.yaml.
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func IsChartDir(dirName string) (bool, error) {
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if fi, err := os.Stat(dirName); err != nil {
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return false, err
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} else if !fi.IsDir() {
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return false, errors.Errorf("%q is not a directory", dirName)
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}
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chartYaml := filepath.Join(dirName, ChartfileName)
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if _, err := os.Stat(chartYaml); os.IsNotExist(err) {
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return false, errors.Errorf("no %s exists in directory %q", ChartfileName, dirName)
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}
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chartYamlContent, err := os.ReadFile(chartYaml)
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if err != nil {
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return false, errors.Errorf("cannot read %s in directory %q", ChartfileName, dirName)
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}
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chartContent := new(chart.Metadata)
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if err := yaml.Unmarshal(chartYamlContent, &chartContent); err != nil {
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return false, err
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}
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if chartContent == nil {
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return false, errors.Errorf("chart metadata (%s) missing", ChartfileName)
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}
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if chartContent.Name == "" {
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return false, errors.Errorf("invalid chart (%s): name must not be empty", ChartfileName)
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}
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return true, nil
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}
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