From c8583c25b289ab2acee538add1462c5c05d1b635 Mon Sep 17 00:00:00 2001
From: Runxi Yu
Date: Sat, 16 May 2026 09:55:16 +0000
Subject: object/store: Simplify; remove composited writer and quarantiner

---
 object/store/doc.go         | 21 ++++++++++++---------
 object/store/errors.go      | 15 ++++++++++++---
 object/store/quarantiner.go | 20 --------------------
 object/store/writer.go      | 10 ----------
 4 files changed, 24 insertions(+), 42 deletions(-)

diff --git a/object/store/doc.go b/object/store/doc.go
index 5dedd7a1..23a8951f 100644
--- a/object/store/doc.go
+++ b/object/store/doc.go
@@ -1,13 +1,16 @@
 // Package store provides interfaces for object storage backends.
 //
-// Reading stores only respond to object-ID queries in terms of headers (type
-// and size), raw bytes, and streaming payloads, but they do not parse commits,
-// trees, blobs, or tags into typed values. Turning stored objects into typed
-// objects is the job of [codeberg.org/lindenii/furgit/object/fetch].
+// Reading stores only respond to object-ID queries
+// in terms of headers (type and size), raw bytes, and streaming payloads,
+// but they do not parse commits, trees, blobs, or tags into typed values.
+// Turning stored objects into typed objects
+// is the job of [codeberg.org/lindenii/furgit/object/fetch].
 //
-// This package does not define one unified writing interface. Backends have
-// very different write models: writing one loose object is natural, while
-// writing one object into a packfile backend is wasteful. Instead, we define
-// distinct optional capabilities for object-wise writes, pack-wise writes,
-// and compose them against quarantined writes.
+// This package does not define one unified writing interface.
+// Backends have very different write models:
+// writing one loose object is natural,
+// while writing one object into a packfile backend is wasteful.
+// Instead, we define distinct optional capabilities
+// for object-wise writes, pack-wise writes, etc.,
+// and compose them for quarantined writes.
 package store
diff --git a/object/store/errors.go b/object/store/errors.go
index 12bb8b28..74da4df1 100644
--- a/object/store/errors.go
+++ b/object/store/errors.go
@@ -2,7 +2,16 @@ package store
 
 import "errors"
 
-// ErrObjectNotFound indicates that an object does not exist in a backend.
-// This error must only be produced by object stores, when it has no
-// specified object ID, but no other unexpected conditions were encountered.
+// ErrObjectNotFound indicates that
+// an object does not exist in a backend.
+// This error must only be produced by object stores,
+// when it has no specified object ID,
+// but no other unexpected conditions were encountered.
 var ErrObjectNotFound = errors.New("objectstore: object not found")
+
+// This is a sentinel with no details,
+// because it could be a frequent occurence,
+// and allocating frequently on expected error paths
+// would be extremely harmful to performance.
+// Sometime, I will audit this again.
+// TODO
\ No newline at end of file
diff --git a/object/store/quarantiner.go b/object/store/quarantiner.go
index 4a2b7e02..a89ad20f 100644
--- a/object/store/quarantiner.go
+++ b/object/store/quarantiner.go
@@ -17,26 +17,6 @@ type QuarantineBase interface {
 	Discard() error
 }
 
-// Quarantine represents one quarantined write
-// that accepts both object-wise and pack-wise writes.
-type Quarantine interface {
-	QuarantineBase
-	Writer
-}
-
-// QuarantineOptions controls the options
-// for one coordinated quarantine creation.
-type QuarantineOptions struct {
-	Object ObjectQuarantineOptions
-	Pack   PackQuarantineOptions
-}
-
-// Quarantiner creates coordinated quarantines
-// that accept both object-wise and pack-wise writes.
-type Quarantiner interface {
-	BeginQuarantine(opts QuarantineOptions) (Quarantine, error)
-}
-
 // ObjectQuarantine represents one quarantined object-wise write.
 type ObjectQuarantine interface {
 	QuarantineBase
diff --git a/object/store/writer.go b/object/store/writer.go
index 828237f5..dd042ed8 100644
--- a/object/store/writer.go
+++ b/object/store/writer.go
@@ -8,14 +8,6 @@ import (
 	"codeberg.org/lindenii/furgit/object/typ"
 )
 
-// Writer represents a store
-// that could perform both pack ingestions
-// and individual object writes.
-type Writer interface {
-	PackWriter
-	ObjectWriter
-}
-
 // ObjectWriter writes individual Git objects.
 type ObjectWriter interface {
 	// WriteReaderContent writes one typed object content stream.
@@ -62,8 +54,6 @@ type PackWriteOptions struct {
 	// When nil,
 	// external thin-base repair is disabled,
 	// and unresolved thin deltas fail ingestion.
-	//
-	// TODO: Define the errors here?
 	ThinBase Reader
 
 	// Progress receives human-readable progress messages
-- 
cgit v1.3.1-10-gc9f91