jbergner
309e94d362
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release-tag / release-image (push) Successful in 2m40s
51 lines
1.3 KiB
Go
51 lines
1.3 KiB
Go
package db
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import (
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"context"
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"database/sql"
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"fmt"
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"os"
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_ "github.com/go-sql-driver/mysql"
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)
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func Open(ctx context.Context, url string) (*sql.DB, error) {
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d, err := sql.Open("mysql", url)
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if err != nil {
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return nil, err
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}
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if err := d.PingContext(ctx); err != nil {
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return nil, err
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}
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return d, nil
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}
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func Migrate(ctx context.Context, d *sql.DB) error {
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d.ExecContext(ctx, `SELECT GET_LOCK('trading_tool_migrate', 30)`)
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defer d.ExecContext(ctx, `SELECT RELEASE_LOCK('trading_tool_migrate')`)
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if _, err := d.ExecContext(ctx, `CREATE TABLE IF NOT EXISTS schema_migrations(version VARCHAR(255) PRIMARY KEY, applied_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP)`); err != nil {
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return err
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}
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files := []string{"migrations/001_init.sql", "migrations/002_admin.sql"}
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for _, f := range files {
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var exists bool
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if err := d.QueryRowContext(ctx, `SELECT EXISTS(SELECT 1 FROM schema_migrations WHERE version=?)`, f).Scan(&exists); err != nil {
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return err
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}
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if exists {
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continue
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}
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b, err := os.ReadFile(f)
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if err != nil {
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return err
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}
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if _, err := d.ExecContext(ctx, string(b)); err != nil {
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return fmt.Errorf("%s: %w", f, err)
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}
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if _, err := d.ExecContext(ctx, `INSERT INTO schema_migrations(version) VALUES(?)`, f); err != nil {
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return err
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}
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}
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return nil
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}
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