55 lines
1.4 KiB
Go
55 lines
1.4 KiB
Go
package migrate
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import (
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"context"
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"fmt"
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"log/slog"
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"os"
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"path/filepath"
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"sort"
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"strings"
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"github.com/jackc/pgx/v5/pgxpool"
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)
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func Run(ctx context.Context, pool *pgxpool.Pool, migrationsDir string) error {
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_, err := pool.Exec(ctx, `
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CREATE TABLE IF NOT EXISTS schema_migrations (
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version VARCHAR(255) PRIMARY KEY,
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applied_at TIMESTAMPTZ NOT NULL DEFAULT now()
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)
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`)
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if err != nil {
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return fmt.Errorf("create migrations table: %w", err)
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}
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files, err := filepath.Glob(filepath.Join(migrationsDir, "*.up.sql"))
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if err != nil {
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return fmt.Errorf("glob migrations: %w", err)
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}
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sort.Strings(files)
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for _, f := range files {
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version := strings.TrimSuffix(filepath.Base(f), ".up.sql")
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var exists bool
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if err := pool.QueryRow(ctx, `SELECT EXISTS(SELECT 1 FROM schema_migrations WHERE version = $1)`, version).Scan(&exists); err != nil {
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return fmt.Errorf("check migration %s: %w", version, err)
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}
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if exists {
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continue
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}
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sql, err := os.ReadFile(f)
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if err != nil {
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return fmt.Errorf("read migration %s: %w", version, err)
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}
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if _, err := pool.Exec(ctx, string(sql)); err != nil {
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return fmt.Errorf("apply migration %s: %w", version, err)
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}
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if _, err := pool.Exec(ctx, `INSERT INTO schema_migrations (version) VALUES ($1)`, version); err != nil {
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return fmt.Errorf("record migration %s: %w", version, err)
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}
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slog.Info("applied migration", "version", version)
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}
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return nil
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}
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