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sap-jenkins-library/pkg/versioning/jsonfile.go
Oliver Nocon b9781ce50c
artifactPrepareVersioning: support more buildTools (#1367)
* artifactPrepareVersioning: support more buildTools
2020-04-15 13:12:43 +02:00

79 lines
1.7 KiB
Go

package versioning
import (
"encoding/json"
"fmt"
"io/ioutil"
"os"
"github.com/pkg/errors"
)
// JSONfile defines an artifact using a json file for versioning
type JSONfile struct {
path string
content map[string]interface{}
versionField string
readFile func(string) ([]byte, error)
writeFile func(string, []byte, os.FileMode) error
}
func (j *JSONfile) init() {
if len(j.versionField) == 0 {
j.versionField = "version"
}
if j.readFile == nil {
j.readFile = ioutil.ReadFile
}
if j.writeFile == nil {
j.writeFile = ioutil.WriteFile
}
}
// VersioningScheme returns the relevant versioning scheme
func (j *JSONfile) VersioningScheme() string {
return "semver2"
}
// GetVersion returns the current version of the artifact with a JSON-based build descriptor
func (j *JSONfile) GetVersion() (string, error) {
j.init()
content, err := j.readFile(j.path)
if err != nil {
return "", errors.Wrapf(err, "failed to read file '%v'", j.path)
}
err = json.Unmarshal(content, &j.content)
if err != nil {
return "", errors.Wrapf(err, "failed to read json content of file '%v'", j.content)
}
return fmt.Sprint(j.content[j.versionField]), nil
}
// SetVersion updates the version of the artifact with a JSON-based build descriptor
func (j *JSONfile) SetVersion(version string) error {
j.init()
if j.content == nil {
_, err := j.GetVersion()
if err != nil {
return err
}
}
j.content[j.versionField] = version
content, err := json.MarshalIndent(j.content, "", " ")
if err != nil {
return errors.Wrapf(err, "failed to create json content for '%v'", j.path)
}
err = j.writeFile(j.path, content, 0700)
if err != nil {
return errors.Wrapf(err, "failed to write file '%v'", j.path)
}
return nil
}