fix: correctly empty dirs before copy

src/migrate/dev.ts

@@ -2,7 +2,7 @@
 //
 // Wrapper around `prisma migrate dev`
 
-import { assert, copy, exists, resolve } from "../deps.ts";
+import { assert, copy, emptyDir, exists, resolve } from "../deps.ts";
 import { Module, Project } from "../project/mod.ts";
 import { forEachPrismaSchema } from "./mod.ts";
 
@@ -50,8 +50,13 @@ export async function migrateDev(
 			// `sourcePath` (which is the original module's source)
 			const tempMigrationsDir = resolve(tempDir, "migrations");
 			if (await exists(tempMigrationsDir)) {
-				await copy(tempMigrationsDir, resolve(module.path, "db", "migrations"), { overwrite: true });
-				await copy(tempMigrationsDir, resolve(module.sourcePath, "db", "migrations"), { overwrite: true });
+				const migrationsDir = resolve(module.path, "db", "migrations");
+				await emptyDir(migrationsDir);
+				await copy(tempMigrationsDir, migrationsDir, { overwrite: true });
+
+				const sourceMigrationsDir = resolve(module.sourcePath, "db", "migrations");
+				await emptyDir(sourceMigrationsDir);
+				await copy(tempMigrationsDir, sourceMigrationsDir, { overwrite: true });
 			}
 		},
 	);

src/project/project.ts

@@ -1,4 +1,4 @@
-import { copy, dirname, exists, resolve } from "../deps.ts";
+import { copy, emptyDir, exists, resolve } from "../deps.ts";
 import { bold, brightRed, glob } from "./deps.ts";
 import { readConfig as readProjectConfig } from "../config/project.ts";
 import { ProjectConfig } from "../config/project.ts";
@@ -180,7 +180,7 @@ async function fetchAndResolveModule(
 		"modules",
 		moduleName,
 	);
-	await Deno.mkdir(dirname(dstPath), { recursive: true });
+	await emptyDir(dstPath);
 	await copy(modulePath, dstPath, { overwrite: true });
 
 	return { genPath: dstPath, sourcePath: modulePath, registry };