diff --git a/src/metafiles/v1.rs b/src/metafiles/v1.rs
index 0401a82a..596b9591 100644
--- a/src/metafiles/v1.rs
+++ b/src/metafiles/v1.rs
@@ -11,7 +11,7 @@ use serde::{Deserialize, Serialize};
 use thiserror::Error;
 
 use super::CrateVersionSource;
-use crate::cargo_home;
+use crate::{cargo_home, create_if_not_exist, FileLock};
 
 #[derive(Clone, Debug, Default, Deserialize, Serialize)]
 pub struct CratesToml {
@@ -55,6 +55,13 @@ impl CratesToml {
         Ok(data.len().try_into().unwrap())
     }
 
+    pub fn write_to_file(&self, file: &mut fs::File) -> Result<(), CratesTomlParseError> {
+        let cnt = self.write_to_writer(&mut *file)?;
+        file.set_len(cnt)?;
+
+        Ok(())
+    }
+
     pub fn write_to_path(&self, path: impl AsRef<Path>) -> Result<(), CratesTomlParseError> {
         fs::write(path, &toml::to_vec(&self)?)?;
         Ok(())