forked from openpitrix/openpitrix
/
save.go
131 lines (112 loc) · 3.01 KB
/
save.go
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// Copyright 2018 The OpenPitrix Authors. All rights reserved.
// Use of this source code is governed by a Apache license
// that can be found in the LICENSE file.
package devkit
import (
"archive/tar"
"compress/gzip"
"encoding/json"
"fmt"
"io/ioutil"
"os"
"path/filepath"
"openpitrix.io/openpitrix/pkg/devkit/app"
)
// Reference: vendor/k8s.io/helm/pkg/chartutil/save.go:97
func Save(c *app.App, outDir string) (string, error) {
// Create archive
if fi, err := os.Stat(outDir); err != nil {
return "", err
} else if !fi.IsDir() {
return "", fmt.Errorf("location [%s] is not a directory", outDir)
}
if c.Metadata == nil {
return "", fmt.Errorf("no [%s] data", PackageJson)
}
cfile := c.Metadata
if cfile.Name == "" {
return "", fmt.Errorf("no package name specified (%s)", PackageJson)
} else if cfile.Version == "" {
return "", fmt.Errorf("no app version specified (%s)", PackageJson)
}
filename := fmt.Sprintf("%s-%s.tgz", cfile.Name, cfile.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); !os.IsExist(err) {
return "", err
}
} else if !stat.IsDir() {
return "", fmt.Errorf("[%s] is not a directory", filepath.Dir(filename))
}
f, err := os.Create(filename)
if err != nil {
return "", err
}
// Wrap in gzip writer
zipper := gzip.NewWriter(f)
// 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
}
func writeTarContents(out *tar.Writer, c *app.App, prefix string) error {
base := filepath.Join(prefix, c.Metadata.Name)
cdata, err := json.Marshal(c.Metadata)
if err != nil {
return err
}
if err := writeToTar(out, base+"/"+PackageJson, cdata); err != nil {
return err
}
if c.ConfigTemplate != nil && len(c.ConfigTemplate.Raw) > 0 {
if err := writeToTar(out, base+"/"+ConfigJson, []byte(c.ConfigTemplate.Raw)); err != nil {
return err
}
}
if c.ClusterConfTemplate != nil && len(c.ClusterConfTemplate.Raw) > 0 {
if err := writeToTar(out, base+"/"+ClusterJsonTmpl, []byte(c.ClusterConfTemplate.Raw)); 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
}
}
return nil
}
// writeToTar writes a single file to a tar archive.
func writeToTar(out *tar.Writer, name string, body []byte) error {
h := &tar.Header{
Name: name,
Mode: 0755,
Size: int64(len(body)),
}
if err := out.WriteHeader(h); err != nil {
return err
}
if _, err := out.Write(body); err != nil {
return err
}
return nil
}
func savePackageJson(filename string, metadata *app.Metadata) error {
out, err := json.MarshalIndent(metadata, "", " ")
if err != nil {
return err
}
return ioutil.WriteFile(filename, out, 0644)
}