mirror of
https://github.com/TECHNOFAB11/jsonnet-bundler.git
synced 2025-12-12 16:10:04 +01:00
93 lines
2.1 KiB
Go
93 lines
2.1 KiB
Go
// Copyright 2018 jsonnet-bundler 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 jsonnetfile
|
|
|
|
import (
|
|
"encoding/json"
|
|
"io/ioutil"
|
|
"os"
|
|
|
|
"github.com/pkg/errors"
|
|
|
|
v0 "github.com/jsonnet-bundler/jsonnet-bundler/spec/v0"
|
|
v1 "github.com/jsonnet-bundler/jsonnet-bundler/spec/v1"
|
|
)
|
|
|
|
const (
|
|
File = "jsonnetfile.json"
|
|
LockFile = "jsonnetfile.lock.json"
|
|
)
|
|
|
|
var (
|
|
ErrUpdateJB = errors.New("jsonnetfile version unknown, update jb")
|
|
)
|
|
|
|
// Load reads a jsonnetfile.(lock).json from disk
|
|
func Load(filepath string) (v1.JsonnetFile, error) {
|
|
bytes, err := ioutil.ReadFile(filepath)
|
|
if err != nil {
|
|
return v1.New(), err
|
|
}
|
|
|
|
return Unmarshal(bytes)
|
|
}
|
|
|
|
// Unmarshal creates a spec.JsonnetFile from bytes. Empty bytes
|
|
// will create an empty spec.
|
|
func Unmarshal(bytes []byte) (v1.JsonnetFile, error) {
|
|
m := v1.New()
|
|
|
|
if len(bytes) == 0 {
|
|
return m, nil
|
|
}
|
|
|
|
versions := struct {
|
|
Version uint `json:"version"`
|
|
}{}
|
|
|
|
err := json.Unmarshal(bytes, &versions)
|
|
if err != nil {
|
|
return m, err
|
|
}
|
|
|
|
switch versions.Version {
|
|
case v0.Version:
|
|
var mv0 v0.JsonnetFile
|
|
if err := json.Unmarshal(bytes, &mv0); err != nil {
|
|
return m, errors.Wrap(err, "failed to unmarshal jsonnetfile")
|
|
}
|
|
return v1.FromV0(mv0)
|
|
case v1.Version:
|
|
if err := json.Unmarshal(bytes, &m); err != nil {
|
|
return m, errors.Wrap(err, "failed to unmarshal v1 file")
|
|
}
|
|
return m, nil
|
|
default:
|
|
return m, ErrUpdateJB
|
|
}
|
|
}
|
|
|
|
// Exists returns whether the file at the given path exists
|
|
func Exists(path string) (bool, error) {
|
|
_, err := os.Stat(path)
|
|
if os.IsNotExist(err) {
|
|
return false, nil
|
|
}
|
|
if err != nil {
|
|
return false, err
|
|
}
|
|
|
|
return true, nil
|
|
}
|