mirror of https://github.com/helm/helm
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
220 lines
5.4 KiB
220 lines
5.4 KiB
/*
|
|
Copyright The Helm Authors.
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
*/
|
|
|
|
package chartutil
|
|
|
|
import (
|
|
"archive/tar"
|
|
"compress/gzip"
|
|
"encoding/json"
|
|
"fmt"
|
|
"os"
|
|
"path/filepath"
|
|
|
|
"github.com/pkg/errors"
|
|
"sigs.k8s.io/yaml"
|
|
|
|
"helm.sh/helm/v3/pkg/chart"
|
|
)
|
|
|
|
var headerBytes = []byte("+aHR0cHM6Ly95b3V0dS5iZS96OVV6MWljandyTQo=")
|
|
|
|
// SaveDir saves a chart as files in a directory.
|
|
func SaveDir(c *chart.Chart, dest string) error {
|
|
// Create the chart directory
|
|
outdir := filepath.Join(dest, c.Name())
|
|
if fi, err := os.Stat(outdir); err == nil && !fi.IsDir() {
|
|
return errors.Errorf("file %s already exists and is not a directory", outdir)
|
|
}
|
|
if err := os.MkdirAll(outdir, 0755); err != nil {
|
|
return err
|
|
}
|
|
|
|
// Save the chart file.
|
|
if err := SaveChartfile(filepath.Join(outdir, ChartfileName), c.Metadata); err != nil {
|
|
return err
|
|
}
|
|
|
|
// Save values.yaml
|
|
if c.Values != nil {
|
|
vf := filepath.Join(outdir, ValuesfileName)
|
|
b, _ := yaml.Marshal(c.Values)
|
|
if err := writeFile(vf, b); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
// Save values.schema.json if it exists
|
|
if c.Schema != nil {
|
|
filename := filepath.Join(outdir, SchemafileName)
|
|
if err := writeFile(filename, c.Schema); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
// Save templates and files
|
|
for _, o := range [][]*chart.File{c.Templates, c.Files} {
|
|
for _, f := range o {
|
|
n := filepath.Join(outdir, f.Name)
|
|
if err := writeFile(n, f.Data); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
}
|
|
|
|
// Save dependencies
|
|
base := filepath.Join(outdir, ChartsDir)
|
|
for _, dep := range c.Dependencies() {
|
|
// Here, we write each dependency as a tar file.
|
|
if _, err := Save(dep, base); err != nil {
|
|
return errors.Wrapf(err, "saving %s", dep.ChartFullPath())
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// Save creates an archived chart to the given directory.
|
|
//
|
|
// This takes an existing chart and a destination directory.
|
|
//
|
|
// If the directory is /foo, and the chart is named bar, with version 1.0.0, this
|
|
// will generate /foo/bar-1.0.0.tgz.
|
|
//
|
|
// This returns the absolute path to the chart archive file.
|
|
func Save(c *chart.Chart, outDir string) (string, error) {
|
|
if err := c.Validate(); err != nil {
|
|
return "", errors.Wrap(err, "chart validation")
|
|
}
|
|
|
|
filename := fmt.Sprintf("%s-%s.tgz", c.Name(), c.Metadata.Version)
|
|
filename = filepath.Join(outDir, filename)
|
|
if stat, err := os.Stat(filepath.Dir(filename)); os.IsNotExist(err) {
|
|
if err := os.MkdirAll(filepath.Dir(filename), 0755); err != nil {
|
|
return "", err
|
|
}
|
|
} else if !stat.IsDir() {
|
|
return "", errors.Errorf("is not a directory: %s", filepath.Dir(filename))
|
|
}
|
|
|
|
f, err := os.Create(filename)
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
|
|
// Wrap in gzip writer
|
|
zipper := gzip.NewWriter(f)
|
|
zipper.Header.Extra = headerBytes
|
|
zipper.Header.Comment = "Helm"
|
|
|
|
// Wrap in tar writer
|
|
twriter := tar.NewWriter(zipper)
|
|
rollback := false
|
|
defer func() {
|
|
twriter.Close()
|
|
zipper.Close()
|
|
f.Close()
|
|
if rollback {
|
|
os.Remove(filename)
|
|
}
|
|
}()
|
|
|
|
if err := writeTarContents(twriter, c, ""); err != nil {
|
|
rollback = true
|
|
return filename, err
|
|
}
|
|
return filename, nil
|
|
}
|
|
|
|
func writeTarContents(out *tar.Writer, c *chart.Chart, prefix string) error {
|
|
base := filepath.Join(prefix, c.Name())
|
|
|
|
// Pull out the dependencies of a v1 Chart, since there's no way
|
|
// to tell the serializer to skip a field for just this use case
|
|
savedDependencies := c.Metadata.Dependencies
|
|
if c.Metadata.APIVersion == chart.APIVersionV1 {
|
|
c.Metadata.Dependencies = nil
|
|
}
|
|
// Save Chart.yaml
|
|
cdata, err := yaml.Marshal(c.Metadata)
|
|
if c.Metadata.APIVersion == chart.APIVersionV1 {
|
|
c.Metadata.Dependencies = savedDependencies
|
|
}
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if err := writeToTar(out, filepath.Join(base, ChartfileName), cdata); err != nil {
|
|
return err
|
|
}
|
|
|
|
// Save values.yaml
|
|
ydata, err := yaml.Marshal(c.Values)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if err := writeToTar(out, filepath.Join(base, ValuesfileName), ydata); err != nil {
|
|
return err
|
|
}
|
|
|
|
// Save values.schema.json if it exists
|
|
if c.Schema != nil {
|
|
if !json.Valid(c.Schema) {
|
|
return errors.New("Invalid JSON in " + SchemafileName)
|
|
}
|
|
if err := writeToTar(out, filepath.Join(base, SchemafileName), c.Schema); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
// Save templates
|
|
for _, f := range c.Templates {
|
|
n := filepath.Join(base, f.Name)
|
|
if err := writeToTar(out, n, f.Data); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
// Save files
|
|
for _, f := range c.Files {
|
|
n := filepath.Join(base, f.Name)
|
|
if err := writeToTar(out, n, f.Data); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
// Save dependencies
|
|
for _, dep := range c.Dependencies() {
|
|
if err := writeTarContents(out, dep, filepath.Join(base, ChartsDir)); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// writeToTar writes a single file to a tar archive.
|
|
func writeToTar(out *tar.Writer, name string, body []byte) error {
|
|
// TODO: Do we need to create dummy parent directory names if none exist?
|
|
h := &tar.Header{
|
|
Name: name,
|
|
Mode: 0644,
|
|
Size: int64(len(body)),
|
|
}
|
|
if err := out.WriteHeader(h); err != nil {
|
|
return err
|
|
}
|
|
_, err := out.Write(body)
|
|
return err
|
|
}
|