1 files changed, 30 insertions, 0 deletions

diff --git a/packages/create-turbo/src/transforms/git-ignore.ts b/packages/create-turbo/src/transforms/git-ignore.ts
new file mode 100644
index 0000000..bb61ca7
--- /dev/null
+++ b/packages/create-turbo/src/transforms/git-ignore.ts
@@ -0,0 +1,30 @@
+import path from "path";
+import fs from "fs-extra";
+import { DEFAULT_IGNORE } from "../utils/git";
+import { TransformInput, TransformResult } from "./types";
+import { TransformError } from "./errors";
+
+const meta = {
+  name: "git-ignore",
+};
+
+export async function transform(args: TransformInput): TransformResult {
+  const { prompts } = args;
+  const ignorePath = path.join(prompts.root, ".gitignore");
+  try {
+    if (!fs.existsSync(ignorePath)) {
+      fs.writeFileSync(ignorePath, DEFAULT_IGNORE);
+    } else {
+      return { result: "not-applicable", ...meta };
+    }
+  } catch (err) {
+    // existsSync cannot throw, so we don't need to narrow here and can
+    // assume this came from writeFileSync
+    throw new TransformError("Unable to write .gitignore", {
+      transform: meta.name,
+      fatal: false,
+    });
+  }
+
+  return { result: "success", ...meta };
+}