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fs_config.go
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fs_config.go
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package releasedir
import (
bosherr "github.com/cloudfoundry/bosh-utils/errors"
boshsys "github.com/cloudfoundry/bosh-utils/system"
"gopkg.in/yaml.v2"
)
/*
# final.yml
---
name: cf
blobstore:
provider: s3
options:
bucket_name: cf-release-blobs
# private.yml
---
blobstore:
options: { ... }
*/
type FSConfig struct {
publicPath string
privatePath string
fs boshsys.FileSystem
}
type fsConfigPublicSchema struct {
Name string `yaml:"name"`
FinalName string `yaml:"final_name,omitempty"`
Blobstore fsConfigSchema_Blobstore `yaml:"blobstore,omitempty"`
}
type fsConfigPrivateSchema struct {
Blobstore fsConfigSchema_Blobstore `yaml:"blobstore"`
}
type fsConfigSchema_Blobstore struct {
Provider string `yaml:"provider"`
Options map[string]interface{} `yaml:"options,omitempty"`
}
func NewFSConfig(publicPath, privatePath string, fs boshsys.FileSystem) FSConfig {
return FSConfig{publicPath: publicPath, privatePath: privatePath, fs: fs}
}
func (c FSConfig) Name() (string, error) {
publicSchema, _, err := c.read()
if err != nil {
return "", err
}
if len(publicSchema.Name) == 0 {
if len(publicSchema.FinalName) == 0 {
return "", bosherr.Errorf(
"Expected non-empty 'name' in config '%s'", c.publicPath)
}
return publicSchema.FinalName, nil
} else if len(publicSchema.FinalName) > 0 {
return "", bosherr.Errorf(
"Expected 'name' or 'final_name' but not both in config '%s'", c.publicPath)
}
return publicSchema.Name, nil
}
func (c FSConfig) SaveName(name string) error {
publicSchema, _, err := c.read()
if err != nil {
return err
}
publicSchema.FinalName = ""
publicSchema.Name = name
bytes, err := yaml.Marshal(publicSchema)
if err != nil {
return bosherr.WrapError(err, "Marshalling config")
}
err = c.fs.WriteFile(c.publicPath, bytes)
if err != nil {
return bosherr.WrapErrorf(err, "Writing config '%s'", c.publicPath)
}
return nil
}
func (c FSConfig) Blobstore() (string, map[string]interface{}, error) {
publicSchema, privateSchema, err := c.read()
if err != nil {
return "", nil, err
}
if len(publicSchema.Blobstore.Provider) == 0 {
return "", nil, bosherr.Errorf(
"Expected non-empty 'blobstore.provider' in config '%s'", c.publicPath)
}
opts := map[string]interface{}{}
for k, v := range publicSchema.Blobstore.Options {
opts[k] = v
}
for k, v := range privateSchema.Blobstore.Options {
opts[k] = v
}
return publicSchema.Blobstore.Provider, opts, nil
}
func (c FSConfig) read() (fsConfigPublicSchema, fsConfigPrivateSchema, error) {
var publicSchema fsConfigPublicSchema
var privateSchema fsConfigPrivateSchema
if c.fs.FileExists(c.publicPath) {
bytes, err := c.fs.ReadFile(c.publicPath)
if err != nil {
return publicSchema, privateSchema,
bosherr.WrapErrorf(err, "Reading config '%s'", c.publicPath)
}
err = yaml.Unmarshal(bytes, &publicSchema)
if err != nil {
return publicSchema, privateSchema,
bosherr.WrapErrorf(err, "Unmarshalling config '%s'", c.publicPath)
}
}
if c.fs.FileExists(c.privatePath) {
bytes, err := c.fs.ReadFile(c.privatePath)
if err != nil {
return publicSchema, privateSchema,
bosherr.WrapErrorf(err, "Reading config '%s'", c.privatePath)
}
err = yaml.Unmarshal(bytes, &privateSchema)
if err != nil {
return publicSchema, privateSchema,
bosherr.WrapErrorf(err, "Unmarshalling config '%s'", c.privatePath)
}
}
return publicSchema, privateSchema, nil
}