From 904eef7628e1685146b6743573a798fc255416ab Mon Sep 17 00:00:00 2001
From: Nikita Sivukhin <sivukhin@turso.tech>
Date: Wed, 30 Jul 2025 00:43:48 +0400
Subject: [PATCH] add tokio-based implementation of filesystem

---
 packages/turso-sync/src/filesystem/tokio.rs | 78 +++++++++++++++++++++
 1 file changed, 78 insertions(+)
 create mode 100644 packages/turso-sync/src/filesystem/tokio.rs

diff --git a/packages/turso-sync/src/filesystem/tokio.rs b/packages/turso-sync/src/filesystem/tokio.rs
new file mode 100644
index 000000000..f9d88b75a
--- /dev/null
+++ b/packages/turso-sync/src/filesystem/tokio.rs
@@ -0,0 +1,78 @@
+use std::path::Path;
+
+use tokio::io::AsyncWriteExt;
+
+use crate::{filesystem::Filesystem, Result};
+
+pub struct TokioFilesystem();
+
+impl Filesystem for TokioFilesystem {
+    type File = tokio::fs::File;
+
+    async fn exists_file(&self, path: &Path) -> Result<bool> {
+        tracing::debug!("check file exists at {:?}", path);
+        Ok(tokio::fs::try_exists(&path).await?)
+    }
+
+    async fn remove_file(&self, path: &Path) -> Result<()> {
+        tracing::debug!("remove file at {:?}", path);
+        match tokio::fs::remove_file(path).await {
+            Ok(()) => Ok(()),
+            Err(e) if e.kind() == std::io::ErrorKind::NotFound => Ok(()),
+            Err(e) => Err(e.into()),
+        }
+    }
+
+    async fn create_file(&self, path: &Path) -> Result<Self::File> {
+        tracing::debug!("create file at {:?}", path);
+        Ok(tokio::fs::File::create_new(path)
+            .await
+            .inspect_err(|e| tracing::error!("failed to create file at {:?}: {}", path, e))?)
+    }
+
+    async fn open_file(&self, path: &Path) -> Result<Self::File> {
+        tracing::debug!("open file at {:?}", path);
+        Ok(tokio::fs::OpenOptions::new()
+            .write(true)
+            .read(true)
+            .open(path)
+            .await?)
+    }
+
+    async fn copy_file(&self, src: &Path, dst: &Path) -> Result<()> {
+        tracing::debug!("copy file from {:?} to {:?}", src, dst);
+        tokio::fs::copy(&src, &dst).await?;
+        Ok(())
+    }
+
+    async fn rename_file(&self, src: &Path, dst: &Path) -> Result<()> {
+        tracing::debug!("rename file from {:?} to {:?}", src, dst);
+        tokio::fs::rename(&src, &dst)
+            .await
+            .inspect_err(|e| tracing::error!("failed to rename {:?} to {:?}: {}", src, dst, e))?;
+        Ok(())
+    }
+
+    async fn truncate_file(&self, file: &Self::File, size: usize) -> Result<()> {
+        tracing::debug!("truncate file to size {}", size);
+        file.set_len(size as u64).await?;
+        Ok(())
+    }
+
+    async fn write_file(&self, file: &mut Self::File, buf: &[u8]) -> Result<()> {
+        tracing::debug!("write buffer of size {} to file", buf.len());
+        file.write_all(&buf).await?;
+        Ok(())
+    }
+
+    async fn sync_file(&self, file: &Self::File) -> Result<()> {
+        tracing::debug!("sync file");
+        file.sync_all().await?;
+        Ok(())
+    }
+
+    async fn read_file(&self, path: &Path) -> Result<Vec<u8>> {
+        tracing::debug!("read file {:?}", path);
+        Ok(tokio::fs::read(path).await?)
+    }
+}