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sap-jenkins-library/pkg/piperenv/environment.go
Kevin Stiehl d1c8abc6b3
refactor: move common pipeline environment handling to golang (#2823)
* make use of new read,writePipelineEnv Steps in groovy

* remove unused cat

Co-authored-by: Christopher Fenner <26137398+CCFenner@users.noreply.github.com>
2021-06-15 14:34:56 +02:00

80 lines
2.6 KiB
Go

package piperenv
import (
"encoding/json"
"io/ioutil"
"os"
"path/filepath"
"strings"
"github.com/SAP/jenkins-library/pkg/log"
"github.com/pkg/errors"
)
// This file contains functions used to read/write pipeline environment data from/to disk.
// The content of a written file is the value. For the custom parameters this could for example also be a JSON representation of a more complex value.
// SetResourceParameter sets a resource parameter in the environment stored in the file system
func SetResourceParameter(path, resourceName, paramName string, value interface{}) error {
var content []byte
paramPath := filepath.Join(path, resourceName, paramName)
switch typedValue := value.(type) {
case string:
content = []byte(typedValue)
default:
var err error
paramPath += ".json"
content, err = json.Marshal(typedValue)
if err != nil {
return errors.Wrapf(err, "failed to marshal resource parameter value %v", typedValue)
}
}
return writeToDisk(paramPath, content)
}
// GetResourceParameter reads a resource parameter from the environment stored in the file system
func GetResourceParameter(path, resourceName, paramName string) string {
//TODO: align JSON un/marshalling, currently done in pkg/congif/stepmeta.go#getParameterValue
paramPath := filepath.Join(path, resourceName, paramName)
return readFromDisk(paramPath)
}
// SetParameter sets any parameter in the pipeline environment or another environment stored in the file system
func SetParameter(path, name, value string) error {
paramPath := filepath.Join(path, name)
return writeToDisk(paramPath, []byte(value))
}
// GetParameter reads any parameter from the pipeline environment or another environment stored in the file system
func GetParameter(path, name string) string {
paramPath := filepath.Join(path, name)
return readFromDisk(paramPath)
}
func writeToDisk(filename string, data []byte) error {
if _, err := os.Stat(filepath.Dir(filename)); os.IsNotExist(err) {
log.Entry().Debugf("Creating directory: %v", filepath.Dir(filename))
os.MkdirAll(filepath.Dir(filename), 0777)
}
//ToDo: make sure to not overwrite file but rather add another file? Create error if already existing?
if len(data) > 0 {
log.Entry().Debugf("Writing file to disk: %v", filename)
return ioutil.WriteFile(filename, data, 0766)
}
return nil
}
func readFromDisk(filename string) string {
//ToDo: if multiple files exist, read from latest file
log.Entry().Debugf("Reading file from disk: %v", filename)
v, err := ioutil.ReadFile(filename)
val := string(v)
if err != nil {
val = ""
}
return strings.TrimSpace(val)
}