fix!: use dyn trait where possible.

This reduces compile time due to avoiding duplication.

gix-odb/src/cache.rs

@@ -145,9 +145,7 @@ mod impls {
     where
         S: crate::Write,
     {
-        type Error = S::Error;
-
-        fn write_stream(&self, kind: Kind, size: u64, from: impl Read) -> Result<ObjectId, Self::Error> {
+        fn write_stream(&self, kind: Kind, size: u64, from: impl Read) -> Result<ObjectId, crate::write::Error> {
             self.inner.write_stream(kind, size, from)
         }
     }
@@ -156,24 +154,24 @@ mod impls {
     where
         S: gix_pack::Find,
     {
-        type Error = S::Error;
-
         fn contains(&self, id: impl AsRef<oid>) -> bool {
-            self.inner.contains(id)
+            self.inner.contains(id.as_ref())
         }
 
-        fn try_find<'a>(&self, id: impl AsRef<oid>, buffer: &'a mut Vec<u8>) -> Result<Option<Data<'a>>, Self::Error> {
-            gix_pack::Find::try_find(self, id, buffer).map(|t| t.map(|t| t.0))
+        fn try_find<'a>(
+            &self,
+            id: impl AsRef<oid>,
+            buffer: &'a mut Vec<u8>,
+        ) -> Result<Option<Data<'a>>, crate::find::Error> {
+            gix_pack::Find::try_find(self, id.as_ref(), buffer).map(|t| t.map(|t| t.0))
         }
     }
 
     impl<S> crate::Header for Cache<S>
     where
         S: crate::Header,
     {
-        type Error = S::Error;
-
-        fn try_header(&self, id: impl AsRef<oid>) -> Result<Option<Header>, Self::Error> {
+        fn try_header(&self, id: impl AsRef<oid>) -> Result<Option<Header>, crate::find::Error> {
             self.inner.try_header(id)
         }
     }
@@ -182,17 +180,15 @@ mod impls {
     where
         S: gix_pack::Find,
     {
-        type Error = S::Error;
-
-        fn contains(&self, id: impl AsRef<oid>) -> bool {
+        fn contains(&self, id: &oid) -> bool {
             self.inner.contains(id)
         }
 
         fn try_find<'a>(
             &self,
-            id: impl AsRef<oid>,
+            id: &oid,
             buffer: &'a mut Vec<u8>,
-        ) -> Result<Option<(Data<'a>, Option<Location>)>, Self::Error> {
+        ) -> Result<Option<(Data<'a>, Option<Location>)>, crate::find::Error> {
             match self.pack_cache.as_ref().map(RefCell::borrow_mut) {
                 Some(mut pack_cache) => self.try_find_cached(id, buffer, pack_cache.deref_mut()),
                 None => self.try_find_cached(id, buffer, &mut gix_pack::cache::Never),
@@ -201,10 +197,10 @@ mod impls {
 
         fn try_find_cached<'a>(
             &self,
-            id: impl AsRef<oid>,
+            id: &oid,
             buffer: &'a mut Vec<u8>,
-            pack_cache: &mut impl gix_pack::cache::DecodeEntry,
-        ) -> Result<Option<(Data<'a>, Option<gix_pack::data::entry::Location>)>, Self::Error> {
+            pack_cache: &mut dyn gix_pack::cache::DecodeEntry,
+        ) -> Result<Option<(Data<'a>, Option<gix_pack::data::entry::Location>)>, crate::find::Error> {
             if let Some(mut obj_cache) = self.object_cache.as_ref().map(RefCell::borrow_mut) {
                 if let Some(kind) = obj_cache.get(&id.as_ref().to_owned(), buffer) {
                     return Ok(Some((Data::new(kind, buffer), None)));
@@ -219,7 +215,7 @@ mod impls {
             Ok(possibly_obj)
         }
 
-        fn location_by_oid(&self, id: impl AsRef<oid>, buf: &mut Vec<u8>) -> Option<gix_pack::data::entry::Location> {
+        fn location_by_oid(&self, id: &oid, buf: &mut Vec<u8>) -> Option<gix_pack::data::entry::Location> {
             self.inner.location_by_oid(id, buf)
         }
 

gix-odb/src/find.rs

@@ -1,13 +1,15 @@
+/// The error type returned by the [`Find`](crate::Find) and [`Header`](crate::Header) traits.
+pub type Error = Box<dyn std::error::Error + Send + Sync + 'static>;
 ///
 pub mod existing {
     use gix_hash::ObjectId;
 
     /// The error returned by the [`find(…)`][crate::FindExt::find()] trait methods.
     #[derive(Debug, thiserror::Error)]
     #[allow(missing_docs)]
-    pub enum Error<T: std::error::Error + 'static> {
+    pub enum Error {
         #[error(transparent)]
-        Find(T),
+        Find(crate::find::Error),
         #[error("An object with id {} could not be found", .oid)]
         NotFound { oid: ObjectId },
     }
@@ -20,9 +22,9 @@ pub mod existing_object {
     /// The error returned by the various [`find_*()`][crate::FindExt::find_commit()] trait methods.
     #[derive(Debug, thiserror::Error)]
     #[allow(missing_docs)]
-    pub enum Error<T: std::error::Error + 'static> {
+    pub enum Error {
         #[error(transparent)]
-        Find(T),
+        Find(crate::find::Error),
         #[error(transparent)]
         Decode(gix_object::decode::Error),
         #[error("An object with id {oid} could not be found")]
@@ -39,9 +41,9 @@ pub mod existing_iter {
     /// The error returned by the various [`find_*_iter()`][crate::FindExt::find_commit_iter()] trait methods.
     #[derive(Debug, thiserror::Error)]
     #[allow(missing_docs)]
-    pub enum Error<T: std::error::Error + 'static> {
+    pub enum Error {
         #[error(transparent)]
-        Find(T),
+        Find(crate::find::Error),
         #[error("An object with id {oid} could not be found")]
         NotFound { oid: ObjectId },
         #[error("Expected object of kind {expected}")]

gix-odb/src/lib.rs

@@ -76,6 +76,12 @@ mod traits;
 
 pub use traits::{Find, FindExt, Header, HeaderExt, Write};
 
+///
+pub mod write {
+    /// The error type returned by the [`Write`](crate::Write) trait.
+    pub type Error = Box<dyn std::error::Error + Send + Sync + 'static>;
+}
+
 /// A thread-local handle to access any object.
 pub type Handle = Cache<store::Handle<OwnShared<Store>>>;
 /// A thread-local handle to access any object, but thread-safe and independent of the actual type of `OwnShared` or feature toggles in `gix-features`.

gix-odb/src/sink.rs

@@ -21,14 +21,12 @@ impl Sink {
 }
 
 impl crate::traits::Write for Sink {
-    type Error = io::Error;
-
     fn write_stream(
         &self,
         kind: gix_object::Kind,
         size: u64,
         mut from: impl io::Read,
-    ) -> Result<gix_hash::ObjectId, Self::Error> {
+    ) -> Result<gix_hash::ObjectId, crate::write::Error> {
         let mut size = size.try_into().expect("object size to fit into usize");
         let mut buf = [0u8; 8096];
         let header = gix_object::encode::loose_header(kind, size);
@@ -42,18 +40,18 @@ impl crate::traits::Write for Sink {
 
         let mut hasher = gix_features::hash::hasher(self.object_hash);
         hasher.update(&header);
-        possibly_compress(&header)?;
+        possibly_compress(&header).map_err(Box::new)?;
 
         while size != 0 {
             let bytes = size.min(buf.len());
-            from.read_exact(&mut buf[..bytes])?;
+            from.read_exact(&mut buf[..bytes]).map_err(Box::new)?;
             hasher.update(&buf[..bytes]);
-            possibly_compress(&buf[..bytes])?;
+            possibly_compress(&buf[..bytes]).map_err(Box::new)?;
             size -= bytes;
         }
         if let Some(compressor) = self.compressor.as_ref() {
             let mut c = compressor.borrow_mut();
-            c.flush()?;
+            c.flush().map_err(Box::new)?;
             c.reset();
         }
 

gix-odb/src/store_impls/dynamic/find.rs

@@ -88,7 +88,7 @@ where
         mut id: &'b gix_hash::oid,
         buffer: &'a mut Vec<u8>,
         inflate: &mut zlib::Inflate,
-        pack_cache: &mut impl DecodeEntry,
+        pack_cache: &mut dyn DecodeEntry,
         snapshot: &mut load_index::Snapshot,
         recursion: Option<error::DeltaBaseRecursion<'_>>,
     ) -> Result<Option<(gix_object::Data<'a>, Option<gix_pack::data::entry::Location>)>, Error> {
@@ -150,7 +150,7 @@ where
                             entry,
                             buffer,
                             inflate,
-                            |id, _out| {
+                            &|id, _out| {
                                 index_file.pack_offset_by_id(id).map(|pack_offset| {
                                     gix_pack::data::decode::entry::ResolvedBase::InPack(pack.entry(pack_offset))
                                 })
@@ -236,7 +236,7 @@ where
                                     entry,
                                     buffer,
                                     inflate,
-                                    |id, out| {
+                                    &|id, out| {
                                         index_file
                                             .pack_offset_by_id(id)
                                             .map(|pack_offset| {
@@ -311,10 +311,8 @@ impl<S> gix_pack::Find for super::Handle<S>
 where
     S: Deref<Target = super::Store> + Clone,
 {
-    type Error = Error;
-
     // TODO: probably make this method fallible, but that would mean its own error type.
-    fn contains(&self, id: impl AsRef<gix_hash::oid>) -> bool {
+    fn contains(&self, id: &gix_hash::oid) -> bool {
         let id = id.as_ref();
         let mut snapshot = self.snapshot.borrow_mut();
         loop {
@@ -346,21 +344,18 @@ where
 
     fn try_find_cached<'a>(
         &self,
-        id: impl AsRef<gix_hash::oid>,
+        id: &gix_hash::oid,
         buffer: &'a mut Vec<u8>,
-        pack_cache: &mut impl DecodeEntry,
-    ) -> Result<Option<(gix_object::Data<'a>, Option<gix_pack::data::entry::Location>)>, Self::Error> {
+        pack_cache: &mut dyn DecodeEntry,
+    ) -> Result<Option<(gix_object::Data<'a>, Option<gix_pack::data::entry::Location>)>, gix_pack::find::Error> {
         let id = id.as_ref();
         let mut snapshot = self.snapshot.borrow_mut();
         let mut inflate = self.inflate.borrow_mut();
         self.try_find_cached_inner(id, buffer, &mut inflate, pack_cache, &mut snapshot, None)
+            .map_err(|err| Box::new(err) as _)
     }
 
-    fn location_by_oid(
-        &self,
-        id: impl AsRef<gix_hash::oid>,
-        buf: &mut Vec<u8>,
-    ) -> Option<gix_pack::data::entry::Location> {
+    fn location_by_oid(&self, id: &gix_hash::oid, buf: &mut Vec<u8>) -> Option<gix_pack::data::entry::Location> {
         assert!(
             matches!(self.token.as_ref(), Some(handle::Mode::KeepDeletedPacksAvailable)),
             "BUG: handle must be configured to `prevent_pack_unload()` before using this method"
@@ -511,17 +506,15 @@ where
     S: Deref<Target = super::Store> + Clone,
     Self: gix_pack::Find,
 {
-    type Error = <Self as gix_pack::Find>::Error;
-
     fn contains(&self, id: impl AsRef<gix_hash::oid>) -> bool {
-        gix_pack::Find::contains(self, id)
+        gix_pack::Find::contains(self, id.as_ref())
     }
 
     fn try_find<'a>(
         &self,
         id: impl AsRef<gix_hash::oid>,
         buffer: &'a mut Vec<u8>,
-    ) -> Result<Option<gix_object::Data<'a>>, Self::Error> {
-        gix_pack::Find::try_find(self, id, buffer).map(|t| t.map(|t| t.0))
+    ) -> Result<Option<gix_object::Data<'a>>, crate::find::Error> {
+        gix_pack::Find::try_find(self, id.as_ref(), buffer).map(|t| t.map(|t| t.0))
     }
 }

gix-odb/src/store_impls/dynamic/header.rs

@@ -73,7 +73,7 @@ where
                             },
                         };
                         let entry = pack.entry(pack_offset);
-                        let res = match pack.decode_header(entry, inflate, |id| {
+                        let res = match pack.decode_header(entry, inflate, &|id| {
                             index_file.pack_offset_by_id(id).map(|pack_offset| {
                                 gix_pack::data::decode::header::ResolvedBase::InPack(pack.entry(pack_offset))
                             })
@@ -130,7 +130,7 @@ where
                                     .as_ref()
                                     .expect("pack to still be available like just now");
                                 let entry = pack.entry(pack_offset);
-                                pack.decode_header(entry, inflate, |id| {
+                                pack.decode_header(entry, inflate, &|id| {
                                     index_file
                                         .pack_offset_by_id(id)
                                         .map(|pack_offset| {
@@ -182,12 +182,11 @@ impl<S> crate::Header for super::Handle<S>
 where
     S: Deref<Target = super::Store> + Clone,
 {
-    type Error = Error;
-
-    fn try_header(&self, id: impl AsRef<oid>) -> Result<Option<Header>, Self::Error> {
+    fn try_header(&self, id: impl AsRef<oid>) -> Result<Option<Header>, crate::find::Error> {
         let id = id.as_ref();
         let mut snapshot = self.snapshot.borrow_mut();
         let mut inflate = self.inflate.borrow_mut();
         self.try_header_inner(id, &mut inflate, &mut snapshot, None)
+            .map_err(|err| Box::new(err) as _)
     }
 }

gix-odb/src/store_impls/dynamic/prefix.rs

@@ -40,13 +40,13 @@ pub mod disambiguate {
         /// matching this prefix.
         pub fn new(id: impl Into<gix_hash::ObjectId>, hex_len: usize) -> Result<Self, gix_hash::prefix::Error> {
             let id = id.into();
-            gix_hash::Prefix::new(id, hex_len)?;
+            gix_hash::Prefix::new(&id, hex_len)?;
             Ok(Candidate { id, hex_len })
         }
 
         /// Transform ourselves into a `Prefix` with our current hex lengths.
         pub fn to_prefix(&self) -> gix_hash::Prefix {
-            gix_hash::Prefix::new(self.id, self.hex_len).expect("our hex-len to always be in bounds")
+            gix_hash::Prefix::new(&self.id, self.hex_len).expect("our hex-len to always be in bounds")
         }
 
         pub(crate) fn inc_hex_len(&mut self) {