101 lines
3.1 KiB
Go
101 lines
3.1 KiB
Go
package sql
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import (
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"context"
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"errors"
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"fmt"
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"io"
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"reflect"
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"time"
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"github.com/FAU-CDI/wisski-distillery/pkg/logging"
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"github.com/FAU-CDI/wisski-distillery/pkg/sqle"
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"github.com/FAU-CDI/wisski-distillery/pkg/timex"
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"github.com/tkw1536/goprogram/exit"
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"github.com/tkw1536/goprogram/stream"
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)
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// Shell runs a mysql shell with the provided databases.
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//
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// NOTE(twiesing): This command should not be used to connect to the database or execute queries except in known situations.
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func (sql *SQL) Shell(ctx context.Context, io stream.IOStream, argv ...string) int {
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return sql.Stack(sql.Environment).Exec(ctx, io, "sql", "mysql", argv...)()
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}
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// unsafeWaitShell waits for a connection via the database shell to succeed
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func (sql *SQL) unsafeWaitShell(ctx context.Context) error {
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n := stream.FromNil()
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return timex.TickUntilFunc(func(time.Time) bool {
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code := sql.Shell(ctx, n, "-e", "select 1;")
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return code == 0
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}, ctx, sql.PollInterval)
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}
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// unsafeQuery shell executes a raw database query.
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func (sql *SQL) unsafeQueryShell(ctx context.Context, query string) bool {
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code := sql.Shell(ctx, stream.FromNil(), "-e", query)
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return code == 0
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}
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var errSQLUnableToCreateUser = errors.New("unable to create administrative user")
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var errSQLUnsafeDatabaseName = errors.New("distillery database has an unsafe name")
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var errSQLUnableToMigrate = exit.Error{
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Message: "unable to migrate %s table: %s",
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ExitCode: exit.ExitGeneric,
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}
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// Update initializes or updates the SQL database.
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func (sql *SQL) Update(ctx context.Context, progress io.Writer) error {
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// unsafely create the admin user!
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{
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if err := sql.unsafeWaitShell(ctx); err != nil {
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return err
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}
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logging.LogMessage(progress, ctx, "Creating administrative user")
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{
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username := sql.Config.MysqlAdminUser
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password := sql.Config.MysqlAdminPassword
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if err := sql.CreateSuperuser(ctx, username, password, true); err != nil {
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return errSQLUnableToCreateUser
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}
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}
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}
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// create the admin user
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logging.LogMessage(progress, ctx, "Creating sql database")
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{
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if !sqle.IsSafeDatabaseLiteral(sql.Config.DistilleryDatabase) {
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return errSQLUnsafeDatabaseName
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}
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createDBSQL := fmt.Sprintf("CREATE DATABASE IF NOT EXISTS `%s`;", sql.Config.DistilleryDatabase)
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if err := sql.Exec(createDBSQL); err != nil {
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return err
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}
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}
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// wait for the database to come up
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logging.LogMessage(progress, ctx, "Waiting for database update to be complete")
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if err := sql.WaitQueryTable(ctx); err != nil {
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return err
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}
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// migrate all of the tables!
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return logging.LogOperation(func() error {
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for _, table := range sql.Dependencies.Tables {
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info := table.TableInfo()
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logging.LogMessage(progress, ctx, "migrating %q table", table.Name)
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db, err := sql.queryTable(ctx, false, info.Name)
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if err != nil {
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return errSQLUnableToMigrate.WithMessageF(table.Name, "unable to access table")
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}
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tp := reflect.New(info.Model).Interface()
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if err := db.AutoMigrate(tp); err != nil {
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return errSQLUnableToMigrate.WithMessageF(table.Name, err)
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}
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}
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return nil
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}, progress, ctx, "migrating database tables")
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}
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