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fs_release_index.go
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/
fs_release_index.go
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package releasedir
import (
"fmt"
"path/filepath"
"sort"
bosherr "github.com/cloudfoundry/bosh-utils/errors"
boshsys "github.com/cloudfoundry/bosh-utils/system"
boshuuid "github.com/cloudfoundry/bosh-utils/uuid"
semver "github.com/cppforlife/go-semi-semantic/version"
"gopkg.in/yaml.v2"
boshrel "github.com/cloudfoundry/bosh-cli/release"
boshrelman "github.com/cloudfoundry/bosh-cli/release/manifest"
)
type FSReleaseIndex struct {
name string
dirPath string
reporter ReleaseIndexReporter
uuidGen boshuuid.Generator
fs boshsys.FileSystem
}
/*
---
builds:
70b9ea8efb83b882021792517b1164550b41bc27:
version: "1"
format-version: "2"
*/
type fsReleaseIndexSchema struct {
Builds fsReleaseIndexSchema_SortedEntries `yaml:"builds"`
FormatVersion string `yaml:"format-version"`
}
type fsReleaseIndexSchema_SortedEntries map[string]fsReleaseIndexSchema_Entry
var _ yaml.Marshaler = fsReleaseIndexSchema_SortedEntries{}
func (e fsReleaseIndexSchema_SortedEntries) MarshalYAML() (interface{}, error) {
var keys []string
for k, _ := range e {
keys = append(keys, k)
}
sort.Sort(sort.StringSlice(keys))
var sortedEntries []yaml.MapItem
for _, k := range keys {
sortedEntries = append(sortedEntries, yaml.MapItem{Key: k, Value: e[k]})
}
return sortedEntries, nil
}
type fsReleaseIndexSchema_Entry struct {
Version string `yaml:"version"`
}
type releaseIndexEntry struct {
Version semver.Version
}
func NewFSReleaseIndex(
name string,
dirPath string,
reporter ReleaseIndexReporter,
uuidGen boshuuid.Generator,
fs boshsys.FileSystem,
) FSReleaseIndex {
return FSReleaseIndex{
name: name,
dirPath: dirPath,
reporter: reporter,
uuidGen: uuidGen,
fs: fs,
}
}
func (i FSReleaseIndex) LastVersion(name string) (*semver.Version, error) {
if len(name) == 0 {
return nil, bosherr.Error("Expected non-empty release name")
}
schema, err := i.read(name)
if err != nil {
return nil, err
}
var versions []semver.Version
for _, entry := range schema.Builds {
ver, err := semver.NewVersionFromString(entry.Version)
if err != nil {
return nil, bosherr.WrapErrorf(err, "Parsing release versions")
}
versions = append(versions, ver)
}
if len(versions) == 0 {
return nil, nil
}
sort.Sort(semver.AscSorting(versions))
return &versions[len(versions)-1], nil
}
func (i FSReleaseIndex) Contains(release boshrel.Release) (bool, error) {
if len(release.Name()) == 0 {
return false, bosherr.Error("Expected non-empty release name")
}
if len(release.Version()) == 0 {
return false, bosherr.Error("Expected non-empty release version")
}
schema, err := i.read(release.Name())
if err != nil {
return false, err
}
for _, entry := range schema.Builds {
if entry.Version == release.Version() {
return true, nil
}
}
return false, nil
}
func (i FSReleaseIndex) Add(manifest boshrelman.Manifest) error {
if len(manifest.Name) == 0 {
return bosherr.Error("Expected non-empty release name")
}
if len(manifest.Version) == 0 {
return bosherr.Error("Expected non-empty release version")
}
schema, err := i.read(manifest.Name)
if err != nil {
return err
}
for _, entry := range schema.Builds {
if entry.Version == manifest.Version {
return bosherr.Errorf("Release version '%s' already exists", manifest.Version)
}
}
uuid, err := i.uuidGen.Generate()
if err != nil {
return bosherr.WrapErrorf(err, "Generating key for release index entry")
}
schema.Builds[uuid] = fsReleaseIndexSchema_Entry{Version: manifest.Version}
desc := fmt.Sprintf("%s/%s", manifest.Name, manifest.Version)
err = i.saveManifest(manifest)
if err != nil {
i.reporter.ReleaseIndexAdded(i.name, desc, err)
return err
}
err = i.save(manifest.Name, schema)
if err != nil {
i.reporter.ReleaseIndexAdded(i.name, desc, err)
return err
}
i.reporter.ReleaseIndexAdded(i.name, desc, nil)
return nil
}
func (i FSReleaseIndex) ManifestPath(name, version string) string {
fileName := fmt.Sprintf("%s-%s.yml", name, version)
return filepath.Join(i.dirPath, name, fileName)
}
func (i FSReleaseIndex) indexPath(name string) string {
return filepath.Join(i.dirPath, name, "index.yml")
}
func (i FSReleaseIndex) read(name string) (fsReleaseIndexSchema, error) {
var schema fsReleaseIndexSchema
// Default to an empty map
schema.Builds = fsReleaseIndexSchema_SortedEntries{}
indexPath := i.indexPath(name)
if !i.fs.FileExists(indexPath) {
return schema, nil
}
bytes, err := i.fs.ReadFile(indexPath)
if err != nil {
return schema, bosherr.WrapErrorf(err, "Reading index")
}
err = yaml.Unmarshal(bytes, &schema)
if err != nil {
return schema, bosherr.WrapError(err, "Unmarshalling index")
}
return schema, nil
}
func (i FSReleaseIndex) save(name string, schema fsReleaseIndexSchema) error {
schema.FormatVersion = "2"
bytes, err := yaml.Marshal(schema)
if err != nil {
return bosherr.WrapError(err, "Marshalling index")
}
indexPath := i.indexPath(name)
err = i.fs.WriteFile(indexPath, bytes)
if err != nil {
return bosherr.WrapErrorf(err, "Writing index")
}
return nil
}
func (i FSReleaseIndex) saveManifest(manifest boshrelman.Manifest) error {
bytes, err := yaml.Marshal(manifest)
if err != nil {
return bosherr.WrapError(err, "Marshalling manifest")
}
manifestPath := i.ManifestPath(manifest.Name, manifest.Version)
err = i.fs.WriteFile(manifestPath, bytes)
if err != nil {
return bosherr.WrapErrorf(err, "Writing manifest")
}
return nil
}