feat(admin): establish core data model

admin/cmd/migrate/main.go

@@ -0,0 +1,58 @@
+package main
+
+import (
+	"context"
+	"errors"
+	"flag"
+	"fmt"
+	"io"
+	"log"
+	"os"
+
+	"cmbuyer/admin/internal/migrations"
+	"cmbuyer/admin/internal/storage/sqlite"
+)
+
+func main() {
+	if err := run(context.Background(), os.Args[1:], os.Stderr); err != nil {
+		log.Print(err)
+		os.Exit(1)
+	}
+}
+
+func run(ctx context.Context, args []string, stderr io.Writer) error {
+	flags := flag.NewFlagSet("migrate", flag.ContinueOnError)
+	flags.SetOutput(stderr)
+	databaseSource := flags.String("database", "", "SQLite data source")
+	migrationDirectory := flags.String("dir", "migrations", "migration directory")
+
+	if err := flags.Parse(args); err != nil {
+		return err
+	}
+	if *databaseSource == "" {
+		return errors.New("-database is required")
+	}
+	if flags.NArg() != 1 {
+		return fmt.Errorf("usage: migrate -database <sqlite-data-source> [-dir <migration-directory>] <up|down|status>")
+	}
+	command := flags.Arg(0)
+	if command != "up" && command != "down" && command != "status" {
+		return fmt.Errorf("unsupported migration command %q", command)
+	}
+
+	database, err := sqlite.Open(*databaseSource)
+	if err != nil {
+		return fmt.Errorf("open SQLite database: %w", err)
+	}
+	defer func() {
+		if err := database.Close(); err != nil {
+			log.Printf("close SQLite database: %v", err)
+		}
+	}()
+
+	if err := migrations.Run(ctx, database, *migrationDirectory, command); err != nil {
+		return fmt.Errorf("run migrations: %w", err)
+	}
+
+	return nil
+}