clippy: Replace seek 0 by rewind

dump/src/lib.rs

@@ -198,7 +198,7 @@ impl From<KindWithContent> for KindDump {
 #[cfg(test)]
 pub(crate) mod test {
     use std::fs::File;
-    use std::io::{Seek, SeekFrom};
+    use std::io::Seek;
     use std::str::FromStr;
 
     use big_s::S;
@@ -410,7 +410,7 @@ pub(crate) mod test {
         // create the dump
         let mut file = tempfile::tempfile().unwrap();
         dump.persist_to(&mut file).unwrap();
-        file.seek(SeekFrom::Start(0)).unwrap();
+        file.rewind().unwrap();
 
         file
     }

dump/src/reader/v5/mod.rs

@@ -33,7 +33,7 @@
 //!
 
 use std::fs::{self, File};
-use std::io::{BufRead, BufReader, ErrorKind, Seek, SeekFrom};
+use std::io::{BufRead, BufReader, ErrorKind, Seek};
 use std::path::Path;
 
 use serde::{Deserialize, Serialize};
@@ -178,7 +178,7 @@ impl V5Reader {
     }
 
     pub fn keys(&mut self) -> Result<Box<dyn Iterator<Item = Result<Key>> + '_>> {
-        self.keys.seek(SeekFrom::Start(0))?;
+        self.keys.rewind()?;
         Ok(Box::new(
             (&mut self.keys).lines().map(|line| -> Result<_> { Ok(serde_json::from_str(&line?)?) }),
         ))

milli/src/update/index_documents/helpers/grenad_helpers.rs

@@ -1,6 +1,6 @@
 use std::borrow::Cow;
 use std::fs::File;
-use std::io::{self, Seek, SeekFrom};
+use std::io::{self, Seek};
 use std::time::Instant;
 
 use grenad::{CompressionType, Sorter};
@@ -66,7 +66,7 @@ pub fn sorter_into_reader(
 
 pub fn writer_into_reader(writer: grenad::Writer<File>) -> Result<grenad::Reader<File>> {
     let mut file = writer.into_inner()?;
-    file.seek(SeekFrom::Start(0))?;
+    file.rewind()?;
     grenad::Reader::new(file).map_err(Into::into)
 }
 

milli/src/update/index_documents/transform.rs

@@ -2,7 +2,7 @@ use std::borrow::Cow;
 use std::collections::hash_map::Entry;
 use std::collections::{HashMap, HashSet};
 use std::fs::File;
-use std::io::{Read, Seek, SeekFrom};
+use std::io::{Read, Seek};
 
 use fxhash::FxHashMap;
 use heed::RoTxn;
@@ -510,7 +510,7 @@ impl<'a, 'i> Transform<'a, 'i> {
 
         let mut original_documents = writer.into_inner()?;
         // We then extract the file and reset the seek to be able to read it again.
-        original_documents.seek(SeekFrom::Start(0))?;
+        original_documents.rewind()?;
 
         // We create a final writer to write the new documents in order from the sorter.
         let mut writer = create_writer(
@@ -522,7 +522,7 @@ impl<'a, 'i> Transform<'a, 'i> {
         // into this writer, extract the file and reset the seek to be able to read it again.
         self.flattened_sorter.write_into_stream_writer(&mut writer)?;
         let mut flattened_documents = writer.into_inner()?;
-        flattened_documents.seek(SeekFrom::Start(0))?;
+        flattened_documents.rewind()?;
 
         let mut new_external_documents_ids_builder: Vec<_> =
             self.new_external_documents_ids_builder.into_iter().collect();
@@ -650,10 +650,10 @@ impl<'a, 'i> Transform<'a, 'i> {
         // Once we have written all the documents, we extract
         // the file and reset the seek to be able to read it again.
         let mut original_documents = original_writer.into_inner()?;
-        original_documents.seek(SeekFrom::Start(0))?;
+        original_documents.rewind()?;
 
         let mut flattened_documents = flattened_writer.into_inner()?;
-        flattened_documents.seek(SeekFrom::Start(0))?;
+        flattened_documents.rewind()?;
 
         let output = TransformOutput {
             primary_key,