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package database
import (
"embed"
"io/fs"
_ "github.com/mattn/go-sqlite3"
)
//go:embed sql/*.sql
var schemaFiles embed.FS
func (db *DB) migrate() error {
statements := make([]string, 0)
err := fs.WalkDir(schemaFiles, ".", func(path string, d fs.DirEntry, err error) error {
if d.IsDir() || err != nil {
return err
}
var stmts []byte
if stmts, err = schemaFiles.ReadFile(path); err != nil {
return err
} else {
statements = append(statements, string(stmts))
}
return nil
})
if err != nil {
return err
}
tx, err := db.Begin()
if err != nil {
return err
}
defer func() {
if err != nil {
_ = tx.Rollback()
}
}()
var version int
if err = tx.QueryRowContext(db.ctx, `SELECT version FROM schema_version;`).Scan(&version); err != nil {
if err.Error() == "no such table: schema_version" {
version = 0
} else {
return err
}
}
for version < len(statements) {
if _, err = tx.ExecContext(db.ctx, statements[version]); err != nil {
return err
}
version++
}
if _, err = tx.ExecContext(db.ctx, `DELETE FROM schema_version; INSERT INTO schema_version (version) VALUES (?);`, version); err != nil {
return err
}
if err = tx.Commit(); err != nil {
return err
}
return nil
}
|
