From cc2fed3297b05a235422a73a00dd943ac011ec9a Mon Sep 17 00:00:00 2001
From: PThorpe92 <preston@turso.tech>
Date: Thu, 14 Aug 2025 13:18:17 -0400
Subject: [PATCH] Remove copy_to API from file IO trait

---
 bindings/javascript/src/lib.rs |  8 -------
 core/io/mod.rs                 | 38 ----------------------------------
 core/storage/database.rs       |  6 ------
 3 files changed, 52 deletions(-)

diff --git a/bindings/javascript/src/lib.rs b/bindings/javascript/src/lib.rs
index d55da2e61..7e7aa1ef8 100644
--- a/bindings/javascript/src/lib.rs
+++ b/bindings/javascript/src/lib.rs
@@ -530,12 +530,4 @@ impl turso_core::DatabaseStorage for DatabaseFile {
         let c = self.file.truncate(len, c)?;
         Ok(c)
     }
-    fn copy_to(
-        &self,
-        src_io: &dyn turso_core::IO,
-        dest_io: &dyn turso_core::IO,
-        path: &str,
-    ) -> turso_core::Result<()> {
-        self.file.copy_to(src_io, dest_io, path)
-    }
 }
diff --git a/core/io/mod.rs b/core/io/mod.rs
index 19933b48f..ef75a1b6e 100644
--- a/core/io/mod.rs
+++ b/core/io/mod.rs
@@ -58,44 +58,6 @@ pub trait File: Send + Sync {
     }
     fn size(&self) -> Result<u64>;
     fn truncate(&self, len: usize, c: Completion) -> Result<Completion>;
-    fn copy_to(&self, src_io: &dyn IO, dest_io: &dyn IO, path: &str) -> Result<()> {
-        // Open or create the destination file
-        let dest_file = dest_io.open_file(path, OpenFlags::Create, false)?;
-        // Get the size of the source file
-        let file_size = self.size()? as usize;
-        if file_size == 0 {
-            return Ok(());
-        }
-
-        // use 1MB chunk size
-        const BUFFER_SIZE: usize = 1024 * 1024;
-        let mut pos = 0;
-
-        while pos < file_size {
-            let chunk_size = (file_size - pos).min(BUFFER_SIZE);
-            // Read from source
-            let read_buffer = Arc::new(Buffer::new_temporary(chunk_size));
-            let read_completion = self.pread(
-                pos,
-                Completion::new_read(read_buffer.clone(), move |_, _| {}),
-            )?;
-
-            // Wait for read to complete
-            src_io.wait_for_completion(read_completion)?;
-
-            // Write to destination
-            let write_completion =
-                dest_file.pwrite(pos, read_buffer, Completion::new_write(|_| {}))?;
-            dest_io.wait_for_completion(write_completion)?;
-
-            pos += chunk_size;
-        }
-        let sync_completion = dest_file.sync(Completion::new_sync(|_| {}))?;
-
-        dest_io.wait_for_completion(sync_completion)?;
-
-        Ok(())
-    }
 }
 
 #[derive(Debug, Copy, Clone, PartialEq)]
diff --git a/core/storage/database.rs b/core/storage/database.rs
index 97098c4aa..d7f4cf552 100644
--- a/core/storage/database.rs
+++ b/core/storage/database.rs
@@ -23,7 +23,6 @@ pub trait DatabaseStorage: Send + Sync {
     fn sync(&self, c: Completion) -> Result<Completion>;
     fn size(&self) -> Result<u64>;
     fn truncate(&self, len: usize, c: Completion) -> Result<Completion>;
-    fn copy_to(&self, src_io: &dyn crate::IO, dest_io: &dyn crate::IO, path: &str) -> Result<()>;
 }
 
 #[cfg(feature = "fs")]
@@ -101,11 +100,6 @@ impl DatabaseStorage for DatabaseFile {
         let c = self.file.truncate(len, c)?;
         Ok(c)
     }
-
-    #[instrument(skip_all, level = Level::INFO)]
-    fn copy_to(&self, src_io: &dyn crate::IO, dest_io: &dyn crate::IO, path: &str) -> Result<()> {
-        self.file.copy_to(src_io, dest_io, path)
-    }
 }
 
 #[cfg(feature = "fs")]