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db.go
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db.go
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// Copyright (c) HashiCorp, Inc.
// SPDX-License-Identifier: MPL-2.0
package examples
import (
"context"
"fmt"
"io/fs"
"io/ioutil"
"net/http"
"os"
"github.com/golang-migrate/migrate/v4"
sqliteMigrator "github.com/golang-migrate/migrate/v4/database/sqlite"
"github.com/golang-migrate/migrate/v4/source/httpfs"
"github.com/hashicorp/go-dbw"
"github.com/hashicorp/go-hclog"
"github.com/openbao/go-kms-wrapping/extras/kms/v2/migrations"
"gorm.io/driver/sqlite"
)
// OpenDB returns an open db connection with it's migrations already run
func OpenDB(ctx context.Context, debug bool) (*dbw.RW, error) {
const (
dialect = "sqlite"
inMemorySqlite = "file::memory:?cache=shared"
cliMigrationsDir = "sqlite-migrations"
tempDirPrefix = "migration-"
)
dialector := sqlite.Open(inMemorySqlite)
var dbOpts []dbw.Option
if !debug {
dbOpts = append(dbOpts, dbw.WithLogger(hclog.NewNullLogger()))
}
db, err := dbw.OpenWith(dialector, dbOpts...)
if err != nil {
return nil, err
}
sqlDB, err := db.SqlDB(ctx)
if err != nil {
return nil, err
}
driver, err := sqliteMigrator.WithInstance(sqlDB, &sqliteMigrator.Config{})
if err != nil {
return nil, err
}
dir, err := ioutil.TempDir(".", tempDirPrefix)
if err != nil {
return nil, err
}
defer os.RemoveAll(dir)
baseMigrations, _ := fs.ReadDir(migrations.SqliteFS, dialect)
for _, m := range baseMigrations {
sql, err := fs.ReadFile(migrations.SqliteFS, fmt.Sprintf("%s/%s", dialect, m.Name()))
if err != nil {
return nil, err
}
if err := os.WriteFile(fmt.Sprintf("%s/%s", dir, m.Name()), sql, 0o666); err != nil {
return nil, err
}
}
cliMigrations, _ := fs.ReadDir(LocalSqliteFS, cliMigrationsDir)
for _, m := range cliMigrations {
sql, err := fs.ReadFile(LocalSqliteFS, fmt.Sprintf("%s/%s", cliMigrationsDir, m.Name()))
if err != nil {
return nil, err
}
if err := os.WriteFile(fmt.Sprintf("%s/%s", dir, m.Name()), sql, 0o666); err != nil {
return nil, err
}
}
source, err := httpfs.New(http.Dir("."), dir)
if err != nil {
return nil, fmt.Errorf("failed to open migrations: %w", err)
}
m, err := migrate.NewWithInstance(
dialect,
source,
dialect,
driver)
if err != nil {
return nil, err
}
err = m.Up()
if err != nil {
return nil, err
}
rw := dbw.New(db)
if debug {
rw.DB().Debug(true)
}
return rw, nil
}