Initial commit

backend/cmd/migrate/main.go

@@ -0,0 +1,105 @@
+// Command migrate manages database migrations.
+//
+// Usage:
+//
+//	go run ./cmd/migrate up        apply all pending migrations
+//	go run ./cmd/migrate down      roll back the most recent group
+//	go run ./cmd/migrate status    list migrations and whether they ran
+//	go run ./cmd/migrate new NAME  create a Go migration scaffold named
+//	                                <timestamp>_NAME.go in
+//	                                internal/database/migrations/
+package main
+
+import (
+	"context"
+	"fmt"
+	"os"
+
+	_ "github.com/joho/godotenv/autoload"
+
+	"git.k6n.net/mats/fullstack-template/internal/config"
+	"git.k6n.net/mats/fullstack-template/internal/database"
+)
+
+func main() {
+	cmd := "up"
+	if len(os.Args) > 1 {
+		cmd = os.Args[1]
+	}
+	if cmd != "up" && cmd != "down" && cmd != "status" && cmd != "new" {
+		fmt.Fprintln(os.Stderr, "usage: migrate [up|down|status|new NAME]")
+		os.Exit(2)
+	}
+
+	cfg, err := config.Load()
+	if err != nil {
+		fatal(err)
+	}
+	db, err := database.Open(cfg)
+	if err != nil {
+		fatal(err)
+	}
+	defer db.Close()
+
+	ctx := context.Background()
+	m := database.NewMigrator(db)
+
+	switch cmd {
+	case "up":
+		if err := m.Init(ctx); err != nil {
+			fatal(err)
+		}
+		group, err := m.Migrate(ctx)
+		if err != nil {
+			fatal(err)
+		}
+		if group.IsZero() {
+			fmt.Println("no pending migrations")
+		} else {
+			fmt.Printf("applied %d migration(s) (group %d)\n", len(group.Migrations), group.ID)
+		}
+	case "down":
+		if err := m.Init(ctx); err != nil {
+			fatal(err)
+		}
+		group, err := m.Rollback(ctx)
+		if err != nil {
+			fatal(err)
+		}
+		if group.IsZero() {
+			fmt.Println("nothing to roll back")
+		} else {
+			fmt.Printf("rolled back %d migration(s) (group %d)\n", len(group.Migrations), group.ID)
+		}
+	case "status":
+		if err := m.Init(ctx); err != nil {
+			fatal(err)
+		}
+		migrations, err := m.MigrationsWithStatus(ctx)
+		if err != nil {
+			fatal(err)
+		}
+		for _, mig := range migrations {
+			state := "pending"
+			if mig.IsApplied() {
+				state = "applied"
+			}
+			fmt.Printf("%-8s %s %s\n", state, mig.Name, mig.Comment)
+		}
+	case "new":
+		if len(os.Args) < 3 {
+			fmt.Fprintln(os.Stderr, "usage: migrate new NAME (snake_case)")
+			os.Exit(2)
+		}
+		file, err := m.CreateGoMigration(ctx, os.Args[2])
+		if err != nil {
+			fatal(err)
+		}
+		fmt.Println("created", file.Path)
+	}
+}
+
+func fatal(err error) {
+	fmt.Fprintln(os.Stderr, "migrate:", err)
+	os.Exit(1)
+}