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77 lines
2.1 KiB
77 lines
2.1 KiB
/*
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Copyright 2016 The Kubernetes Authors All rights reserved.
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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 plugingetter
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import (
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"bytes"
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"fmt"
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"os"
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"os/exec"
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"path/filepath"
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"k8s.io/helm/pkg/getter"
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"k8s.io/helm/pkg/helm/environment"
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"k8s.io/helm/pkg/plugin"
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)
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// PluginGetter is a generic type to invoke custom downloaders,
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// implemented in plugins.
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type PluginGetter struct {
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command string
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certFile, keyFile, cAFile string
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settings environment.EnvSettings
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name string
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base string
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}
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// Get runs downloader plugin command
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func (p *PluginGetter) Get(href string) (*bytes.Buffer, error) {
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argv := []string{p.certFile, p.keyFile, p.cAFile, href}
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prog := exec.Command(filepath.Join(p.base, p.command), argv...)
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plugin.SetupPluginEnv(p.settings, p.name, p.base)
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prog.Env = os.Environ()
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buf := bytes.NewBuffer(nil)
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prog.Stdout = buf
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prog.Stderr = os.Stderr
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if err := prog.Run(); err != nil {
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if eerr, ok := err.(*exec.ExitError); ok {
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os.Stderr.Write(eerr.Stderr)
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return nil, fmt.Errorf("plugin %q exited with error", p.command)
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}
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return nil, err
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}
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return buf, nil
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}
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// ConstructNew constructs a valid plugin getter
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func ConstructNew(command string,
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settings environment.EnvSettings,
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name string,
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base string) getter.Constructor {
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return func(URL, CertFile, KeyFile, CAFile string) (getter.Getter, error) {
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result := &PluginGetter{
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command: command,
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certFile: CertFile,
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keyFile: KeyFile,
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cAFile: CAFile,
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settings: settings,
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name: name,
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base: base,
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}
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return result, nil
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}
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}
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