mirror of
https://github.com/TECHNOFAB11/jsonnet-bundler.git
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bcd89fd33d
Adds a `version` field to the `jsonnetfile.json`, so that `jb` can automatically recognize too old / too new schema versions, instead of panicking.
113 lines
2.6 KiB
Go
113 lines
2.6 KiB
Go
// Copyright 2018 jsonnet-bundler authors
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//
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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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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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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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package jsonnetfile
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import (
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"encoding/json"
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"io/ioutil"
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"os"
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"github.com/pkg/errors"
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v0 "github.com/jsonnet-bundler/jsonnet-bundler/spec/v0"
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v1 "github.com/jsonnet-bundler/jsonnet-bundler/spec/v1"
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depsv1 "github.com/jsonnet-bundler/jsonnet-bundler/spec/v1/deps"
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)
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const (
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File = "jsonnetfile.json"
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LockFile = "jsonnetfile.lock.json"
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)
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var (
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ErrUpdateJB = errors.New("jsonnetfile version unknown, update jb")
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)
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// Load reads a jsonnetfile.(lock).json from disk
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func Load(filepath string) (v1.JsonnetFile, error) {
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bytes, err := ioutil.ReadFile(filepath)
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if err != nil {
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return v1.New(), err
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}
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return Unmarshal(bytes)
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}
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// Unmarshal creates a spec.JsonnetFile from bytes. Empty bytes
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// will create an empty spec.
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func Unmarshal(bytes []byte) (v1.JsonnetFile, error) {
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m := v1.New()
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if len(bytes) == 0 {
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return m, nil
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}
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versions := struct {
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Version uint `json:"version"`
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}{}
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err := json.Unmarshal(bytes, &versions)
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if err != nil {
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return m, err
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}
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if versions.Version > v1.Version {
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return m, ErrUpdateJB
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}
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if versions.Version == v1.Version {
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if err := json.Unmarshal(bytes, &m); err != nil {
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return m, errors.Wrap(err, "failed to unmarshal v1 file")
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}
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return m, nil
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} else {
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var mv0 v0.JsonnetFile
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if err := json.Unmarshal(bytes, &mv0); err != nil {
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return m, errors.Wrap(err, "failed to unmarshal jsonnetfile")
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}
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for name, dep := range mv0.Dependencies {
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var d depsv1.Dependency
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if dep.Source.GitSource != nil {
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d = *depsv1.Parse("", dep.Source.GitSource.Remote)
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d.Source.GitSource.Subdir = dep.Source.GitSource.Subdir
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}
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if dep.Source.LocalSource != nil {
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d = *depsv1.Parse(dep.Source.LocalSource.Directory, dep.Source.GitSource.Remote)
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}
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d.Sum = dep.Sum
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d.Version = dep.Version
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m.Dependencies[name] = d
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}
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return m, nil
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}
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}
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// Exists returns whether the file at the given path exists
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func Exists(path string) (bool, error) {
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_, err := os.Stat(path)
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if os.IsNotExist(err) {
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return false, nil
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}
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if err != nil {
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return false, err
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}
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return true, nil
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}
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