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pull.go
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pull.go
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/*
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 action
import (
"fmt"
"io/ioutil"
"os"
"path/filepath"
"strings"
"github.com/pkg/errors"
"helm.sh/helm/pkg/chartutil"
"helm.sh/helm/pkg/cli"
"helm.sh/helm/pkg/downloader"
"helm.sh/helm/pkg/getter"
"helm.sh/helm/pkg/repo"
)
// Pull is the action for checking a given release's information.
//
// It provides the implementation of 'helm pull'.
type Pull struct {
ChartPathOptions
Settings cli.EnvSettings // TODO: refactor this out of pkg/action
Devel bool
Untar bool
VerifyLater bool
UntarDir string
DestDir string
}
// NewPull creates a new Pull object with the given configuration.
func NewPull() *Pull {
return &Pull{}
}
// Run executes 'helm pull' against the given release.
func (p *Pull) Run(chartRef string) (string, error) {
var out strings.Builder
c := downloader.ChartDownloader{
HelmHome: p.Settings.Home,
Out: &out,
Keyring: p.Keyring,
Verify: downloader.VerifyNever,
Getters: getter.All(p.Settings),
Options: []getter.Option{
getter.WithBasicAuth(p.Username, p.Password),
},
}
if p.Verify {
c.Verify = downloader.VerifyAlways
} else if p.VerifyLater {
c.Verify = downloader.VerifyLater
}
// If untar is set, we fetch to a tempdir, then untar and copy after
// verification.
dest := p.DestDir
if p.Untar {
var err error
dest, err = ioutil.TempDir("", "helm-")
if err != nil {
return out.String(), errors.Wrap(err, "failed to untar")
}
defer os.RemoveAll(dest)
}
if p.RepoURL != "" {
chartURL, err := repo.FindChartInAuthRepoURL(p.RepoURL, p.Username, p.Password, chartRef, p.Version, p.CertFile, p.KeyFile, p.CaFile, getter.All(p.Settings))
if err != nil {
return out.String(), err
}
chartRef = chartURL
}
saved, v, err := c.DownloadTo(chartRef, p.Version, dest)
if err != nil {
return out.String(), err
}
if p.Verify {
fmt.Fprintf(&out, "Verification: %v\n", v)
}
// After verification, untar the chart into the requested directory.
if p.Untar {
ud := p.UntarDir
if !filepath.IsAbs(ud) {
ud = filepath.Join(p.DestDir, ud)
}
if fi, err := os.Stat(ud); err != nil {
if err := os.MkdirAll(ud, 0755); err != nil {
return out.String(), errors.Wrap(err, "failed to untar (mkdir)")
}
} else if !fi.IsDir() {
return out.String(), errors.Errorf("failed to untar: %s is not a directory", ud)
}
return out.String(), chartutil.ExpandFile(ud, saved)
}
return out.String(), nil
}