/
manager.go
129 lines (114 loc) · 2.96 KB
/
manager.go
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package local
import (
"bytes"
"errors"
"fmt"
"path"
"github.com/dgraph-io/badger/v4"
"github.com/vmihailenco/msgpack"
"github.com/Dafaque/sshaman/internal/config"
"github.com/Dafaque/sshaman/internal/credentials"
)
const (
badgerDir string = "db"
)
type manager struct {
db *badger.DB
location string
}
func NewManager(cfg *config.Config) (credentials.Manager, error) {
dbLocation := path.Join(cfg.Home, badgerDir)
opts := badger.DefaultOptions(dbLocation)
opts.Logger = nil
opts.MetricsEnabled = false
opts.VerifyValueChecksum = true
opts.EncryptionKey = cfg.EncryptionKey
opts.IndexCacheSize = 100 << 20
opts.NumVersionsToKeep = 1
opts.CompactL0OnClose = true
opts.ValueLogFileSize = 1024 * 1024 * 10
opts.InMemory = false
db, err := badger.Open(opts)
if err != nil {
return nil, err
}
return &manager{
db: db,
location: dbLocation,
}, nil
}
func (m *manager) Get(name string) (*credentials.Credentials, error) {
tx := m.db.NewTransaction(false)
item, err := tx.Get([]byte(name))
if err != nil {
return nil, err
}
var creds credentials.Credentials
err = item.Value(func(val []byte) error {
return m.decodeCredentials(val, &creds)
})
return &creds, err
}
func (m *manager) Set(name string, cred *credentials.Credentials, force bool) error {
existedCred, err := m.Get(name)
if existedCred != nil && !force {
return fmt.Errorf("connection %s is already exists; use -force to override", name)
} else if err != nil && !errors.Is(err, badger.ErrKeyNotFound) {
return err
}
return m.db.Update(func(txn *badger.Txn) error {
buf := bytes.NewBuffer(nil)
encoder := msgpack.NewEncoder(buf)
if err := encoder.Encode(cred); err != nil {
return err
}
return txn.Set([]byte(name), buf.Bytes())
})
}
func (m *manager) Del(alias string) error {
return m.db.Update(func(txn *badger.Txn) error {
return txn.Delete([]byte(alias))
})
}
func (m *manager) List() ([]*credentials.Credentials, error) {
var creds []*credentials.Credentials = make([]*credentials.Credentials, 0)
err := m.db.View(func(txn *badger.Txn) error {
opts := badger.DefaultIteratorOptions
opts.PrefetchSize = 10
it := txn.NewIterator(opts)
defer it.Close()
for it.Rewind(); it.Valid(); it.Next() {
item := it.Item()
err := item.Value(func(val []byte) error {
var cred credentials.Credentials
if err := m.decodeCredentials(val, &cred); err != nil {
return err
}
creds = append(creds, &cred)
return nil
})
if err != nil {
return err
}
}
return nil
})
return creds, err
}
func (m *manager) Drop() error {
return m.db.DropAll()
}
func (m *manager) Done() error {
if err := m.db.RunValueLogGC(0.5); err != nil {
if !errors.Is(err, badger.ErrNoRewrite) {
fmt.Println(err)
}
}
return m.db.Close()
}
func (m *manager) decodeCredentials(val []byte, creds *credentials.Credentials) error {
creds.Source = m.location
buf := bytes.NewBuffer(val)
decoder := msgpack.NewDecoder(buf)
return decoder.Decode(creds)
}