/
sqlite.go
76 lines (62 loc) · 1.57 KB
/
sqlite.go
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// SPDX-FileCopyrightText: 2021 The margaret Authors
//
// SPDX-License-Identifier: MIT
package sqlite
import (
"database/sql"
"os"
"path/filepath"
"github.com/pkg/errors"
"go.cryptoscope.co/margaret/internal/persist"
)
type SqliteSaver struct {
db *sql.DB
}
var _ persist.Saver = (*SqliteSaver)(nil)
func (sl SqliteSaver) Close() error {
return sl.db.Close()
}
func New(path string) (*SqliteSaver, error) {
s, err := os.Stat(path)
if os.IsNotExist(err) {
if filepath.Dir(path) == "" {
path = "."
}
err = os.MkdirAll(path, 0700)
if err != nil {
return nil, errors.Wrap(err, "failed to create path location")
}
s, err = os.Stat(path)
if err != nil {
return nil, errors.Wrap(err, "failed to stat created path location")
}
} else if err != nil {
return nil, errors.Wrap(err, "failed to stat path location")
}
if s.IsDir() {
path = filepath.Join(path, "log.db")
}
db, err := sql.Open("sqlite3", path)
if err != nil {
return nil, errors.Wrapf(err, "failed to open sqlite file: %s", path)
}
var version int
err = db.QueryRow(`PRAGMA user_version`).Scan(&version)
if err == sql.ErrNoRows || version == 0 { // new file or old schema
if _, err := db.Exec(schemaVersion1); err != nil {
return nil, errors.Wrap(err, "persist/sqlite: failed to init schema v1")
}
} else if err != nil {
return nil, errors.Wrapf(err, "persist/sqlite: schema version lookup failed %s", path)
}
return &SqliteSaver{
db: db,
}, nil
}
const schemaVersion1 = `
CREATE TABLE persisted_roaring (
key varchar PRIMARY KEY,
data blob
);
PRAGMA user_version = 1;
`