github.com/hasnat/dolt/go@v0.0.0-20210628190320-9eb5d843fbb7/libraries/doltcore/dbfactory/file.go (about) 1 // Copyright 2019 Dolthub, Inc. 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 package dbfactory 16 17 import ( 18 "context" 19 "net/url" 20 "os" 21 "path/filepath" 22 23 "github.com/dolthub/dolt/go/libraries/utils/filesys" 24 "github.com/dolthub/dolt/go/store/datas" 25 "github.com/dolthub/dolt/go/store/nbs" 26 "github.com/dolthub/dolt/go/store/types" 27 ) 28 29 const ( 30 // DoltDir defines the directory used to hold the dolt repo data within the filesys 31 DoltDir = ".dolt" 32 33 // DataDir is the directory internal to the DoltDir which holds the noms files. 34 DataDir = "noms" 35 ) 36 37 // DoltDataDir is the directory where noms files will be stored 38 var DoltDataDir = filepath.Join(DoltDir, DataDir) 39 40 // FileFactory is a DBFactory implementation for creating local filesys backed databases 41 type FileFactory struct { 42 } 43 44 // CreateDB creates an local filesys backed database 45 func (fact FileFactory) CreateDB(ctx context.Context, nbf *types.NomsBinFormat, urlObj *url.URL, params map[string]string) (datas.Database, error) { 46 path, err := url.PathUnescape(urlObj.Path) 47 48 if err != nil { 49 return nil, err 50 } 51 52 path = filepath.FromSlash(path) 53 path = urlObj.Host + path 54 55 info, err := os.Stat(path) 56 57 if err != nil { 58 return nil, err 59 } else if !info.IsDir() { 60 return nil, filesys.ErrIsFile 61 } 62 63 st, err := nbs.NewLocalStore(ctx, nbf.VersionString(), path, defaultMemTableSize) 64 65 if err != nil { 66 return nil, err 67 } 68 69 return datas.NewDatabase(nbs.NewNBSMetricWrapper(st)), nil 70 }