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root.go
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root.go
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package env_v0_3
import (
"encoding/json"
"github.com/openziti/zrok/environment/env_core"
"github.com/pkg/errors"
"os"
"path/filepath"
)
const V = "v0.3"
type Root struct {
meta *env_core.Metadata
cfg *env_core.Config
env *env_core.Environment
}
func Assert() (bool, error) {
exists, err := rootExists()
if err != nil {
return true, err
}
if exists {
meta, err := loadMetadata()
if err != nil {
return true, err
}
return meta.V == V, nil
}
return false, nil
}
func Load() (*Root, error) {
r := &Root{}
exists, err := rootExists()
if err != nil {
return nil, err
}
if exists {
if meta, err := loadMetadata(); err == nil {
r.meta = meta
} else {
return nil, err
}
if cfg, err := loadConfig(); err == nil {
r.cfg = cfg
}
if env, err := loadEnvironment(); err == nil {
r.env = env
}
} else {
root, err := rootDir()
if err != nil {
return nil, err
}
r.meta = &env_core.Metadata{
V: V,
RootPath: root,
}
}
return r, nil
}
func rootExists() (bool, error) {
mf, err := metadataFile()
if err != nil {
return false, err
}
_, err = os.Stat(mf)
if os.IsNotExist(err) {
return false, nil
}
if err != nil {
return false, err
}
return true, nil
}
func assertMetadata() error {
exists, err := rootExists()
if err != nil {
return err
}
if !exists {
if err := writeMetadata(); err != nil {
return err
}
}
return nil
}
func loadMetadata() (*env_core.Metadata, error) {
mf, err := metadataFile()
if err != nil {
return nil, err
}
data, err := os.ReadFile(mf)
if err != nil {
return nil, err
}
m := &metadata{}
if err := json.Unmarshal(data, m); err != nil {
return nil, errors.Wrapf(err, "error unmarshaling metadata file '%v'", mf)
}
if m.V != V {
return nil, errors.Errorf("got metadata version '%v', expected '%v'", m.V, V)
}
rf, err := rootDir()
if err != nil {
return nil, err
}
out := &env_core.Metadata{
V: m.V,
RootPath: rf,
}
return out, nil
}
func writeMetadata() error {
mf, err := metadataFile()
if err != nil {
return err
}
data, err := json.Marshal(&metadata{V: V})
if err != nil {
return err
}
if err := os.MkdirAll(filepath.Dir(mf), os.FileMode(0700)); err != nil {
return err
}
if err := os.WriteFile(mf, data, os.FileMode(0600)); err != nil {
return err
}
return nil
}
func loadConfig() (*env_core.Config, error) {
cf, err := configFile()
if err != nil {
return nil, errors.Wrap(err, "error getting config file path")
}
data, err := os.ReadFile(cf)
if err != nil {
return nil, errors.Wrapf(err, "error reading config file '%v'", cf)
}
cfg := &config{}
if err := json.Unmarshal(data, cfg); err != nil {
return nil, errors.Wrapf(err, "error unmarshaling config file '%v'", cf)
}
out := &env_core.Config{
ApiEndpoint: cfg.ApiEndpoint,
}
return out, nil
}
func saveConfig(cfg *env_core.Config) error {
in := &config{ApiEndpoint: cfg.ApiEndpoint}
data, err := json.MarshalIndent(in, "", " ")
if err != nil {
return errors.Wrap(err, "error marshaling config")
}
cf, err := configFile()
if err != nil {
return errors.Wrap(err, "error getting config file path")
}
if err := os.MkdirAll(filepath.Dir(cf), os.FileMode(0700)); err != nil {
return errors.Wrapf(err, "error creating environment path '%v'", filepath.Dir(cf))
}
if err := os.WriteFile(cf, data, os.FileMode(0600)); err != nil {
return errors.Wrap(err, "error saving config file")
}
return nil
}
func isEnabled() (bool, error) {
ef, err := environmentFile()
if err != nil {
return false, errors.Wrap(err, "error getting environment file path")
}
_, err = os.Stat(ef)
if os.IsNotExist(err) {
return false, nil
}
if err != nil {
return false, errors.Wrapf(err, "error stat-ing environment file '%v'", ef)
}
return true, nil
}
func loadEnvironment() (*env_core.Environment, error) {
ef, err := environmentFile()
if err != nil {
return nil, errors.Wrap(err, "error getting environment file")
}
data, err := os.ReadFile(ef)
if err != nil {
return nil, errors.Wrapf(err, "error reading environment file '%v'", ef)
}
env := &environment{}
if err := json.Unmarshal(data, env); err != nil {
return nil, errors.Wrapf(err, "error unmarshaling environment file '%v'", ef)
}
out := &env_core.Environment{
Token: env.Token,
ZitiIdentity: env.ZId,
ApiEndpoint: env.ApiEndpoint,
}
return out, nil
}
func saveEnvironment(env *env_core.Environment) error {
in := &environment{
Token: env.Token,
ZId: env.ZitiIdentity,
ApiEndpoint: env.ApiEndpoint,
}
data, err := json.MarshalIndent(in, "", " ")
if err != nil {
return errors.Wrap(err, "error marshaling environment")
}
ef, err := environmentFile()
if err != nil {
return errors.Wrap(err, "error getting environment file")
}
if err := os.MkdirAll(filepath.Dir(ef), os.FileMode(0700)); err != nil {
return errors.Wrapf(err, "error creating environment path '%v'", filepath.Dir(ef))
}
if err := os.WriteFile(ef, data, os.FileMode(0600)); err != nil {
return errors.Wrap(err, "error saving environment file")
}
return nil
}
func deleteEnvironment() error {
ef, err := environmentFile()
if err != nil {
return errors.Wrap(err, "error getting environment file")
}
if err := os.Remove(ef); err != nil {
return errors.Wrap(err, "error removing environment file")
}
return nil
}
type metadata struct {
V string `json:"v"`
}
type config struct {
ApiEndpoint string `json:"api_endpoint"`
}
type environment struct {
Token string `json:"zrok_token"`
ZId string `json:"ziti_identity"`
ApiEndpoint string `json:"api_endpoint"`
}