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koushiro pushed a commit to branch extract-tail-cut-layer
in repository https://gitbox.apache.org/repos/asf/opendal.git

commit 94af62b6ff9cfb9f3c710df8e9a745a4955ed9f5
Author: koushiro <[email protected]>
AuthorDate: Thu Dec 11 14:33:31 2025 +0800

    refactor: Split tail-cut layer to new crate
---
 core/Cargo.lock                                    |  9 +++++
 core/Cargo.toml                                    |  2 ++
 core/core/src/layers/mod.rs                        |  4 ---
 core/layers/tail-cut/Cargo.toml                    | 39 ++++++++++++++++++++++
 .../tail_cut.rs => layers/tail-cut/src/lib.rs}     | 25 ++++++++------
 core/src/lib.rs                                    |  2 ++
 6 files changed, 66 insertions(+), 15 deletions(-)

diff --git a/core/Cargo.lock b/core/Cargo.lock
index b8671c60a..dedc6fb39 100644
--- a/core/Cargo.lock
+++ b/core/Cargo.lock
@@ -5490,6 +5490,7 @@ dependencies = [
  "opendal-layer-otelmetrics",
  "opendal-layer-prometheus",
  "opendal-layer-prometheus-client",
+ "opendal-layer-tail-cut",
  "opendal-service-aliyun-drive",
  "opendal-service-azblob",
  "opendal-service-azdls",
@@ -5740,6 +5741,14 @@ dependencies = [
  "prometheus-client",
 ]
 
+[[package]]
+name = "opendal-layer-tail-cut"
+version = "0.55.0"
+dependencies = [
+ "opendal-core",
+ "tokio",
+]
+
 [[package]]
 name = "opendal-service-aliyun-drive"
 version = "0.55.0"
diff --git a/core/Cargo.toml b/core/Cargo.toml
index cae8ccce8..6a4cc491d 100644
--- a/core/Cargo.toml
+++ b/core/Cargo.toml
@@ -99,6 +99,7 @@ layers-otel-metrics = ["dep:opendal-layer-otelmetrics"]
 layers-otel-trace = ["opendal-core/layers-otel-trace"]
 layers-prometheus = ["dep:opendal-layer-prometheus"]
 layers-prometheus-client = ["dep:opendal-layer-prometheus-client"]
+layers-tail-cut = ["dep:opendal-layer-tail-cut"]
 layers-throttle = ["opendal-core/layers-throttle"]
 layers-tracing = ["opendal-core/layers-tracing"]
 reqwest-rustls-tls = ["opendal-core/reqwest-rustls-tls"]
@@ -195,6 +196,7 @@ opendal-layer-metrics = { path = "layers/metrics", version 
= "0.55.0", optional
 opendal-layer-otelmetrics = { path = "layers/otelmetrics", version = "0.55.0", 
optional = true, default-features = false }
 opendal-layer-prometheus = { path = "layers/prometheus", version = "0.55.0", 
optional = true, default-features = false }
 opendal-layer-prometheus-client = { path = "layers/prometheus-client", version 
= "0.55.0", optional = true, default-features = false }
+opendal-layer-tail-cut = { path = "layers/tail-cut", version = "0.55.0", 
optional = true, default-features = false }
 opendal-layer-fastmetrics = { path = "layers/fastmetrics", version = "0.55.0", 
optional = true, default-features = false }
 opendal-service-aliyun-drive = { path = "services/aliyun-drive", version = 
"0.55.0", optional = true, default-features = false }
 opendal-service-azblob = { path = "services/azblob", version = "0.55.0", 
optional = true, default-features = false }
diff --git a/core/core/src/layers/mod.rs b/core/core/src/layers/mod.rs
index 4b1012ff6..80d48d2d7 100644
--- a/core/core/src/layers/mod.rs
+++ b/core/core/src/layers/mod.rs
@@ -56,10 +56,6 @@ mod retry;
 pub use self::retry::RetryInterceptor;
 pub use self::retry::RetryLayer;
 
-mod tail_cut;
-pub use self::tail_cut::TailCutLayer;
-pub use self::tail_cut::TailCutLayerBuilder;
-
 #[cfg(feature = "layers-tracing")]
 mod tracing;
 #[cfg(feature = "layers-tracing")]
diff --git a/core/layers/tail-cut/Cargo.toml b/core/layers/tail-cut/Cargo.toml
new file mode 100644
index 000000000..6e67b2739
--- /dev/null
+++ b/core/layers/tail-cut/Cargo.toml
@@ -0,0 +1,39 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
+[package]
+description = "Apache OpenDAL tail-cut layer"
+name = "opendal-layer-tail-cut"
+
+authors = { workspace = true }
+edition = { workspace = true }
+homepage = { workspace = true }
+license = { workspace = true }
+repository = { workspace = true }
+rust-version = { workspace = true }
+version = { workspace = true }
+
+[package.metadata.docs.rs]
+all-features = true
+
+[dependencies]
+opendal-core = { path = "../../core", version = "0.55.0", default-features = 
false }
+tokio = { workspace = true, features = ["time"] }
+
+[dev-dependencies]
+opendal-core = { path = "../../core", version = "0.55.0" }
+tokio = { workspace = true, features = ["macros", "rt-multi-thread"] }
diff --git a/core/core/src/layers/tail_cut.rs b/core/layers/tail-cut/src/lib.rs
similarity index 98%
rename from core/core/src/layers/tail_cut.rs
rename to core/layers/tail-cut/src/lib.rs
index ae5189d25..3ecaedbaa 100644
--- a/core/core/src/layers/tail_cut.rs
+++ b/core/layers/tail-cut/src/lib.rs
@@ -20,8 +20,8 @@ use std::fmt::Formatter;
 use std::sync::Arc;
 use std::sync::atomic::{AtomicU64, AtomicUsize, Ordering};
 
-use crate::raw::*;
-use crate::*;
+use opendal_core::raw::*;
+use opendal_core::*;
 
 /// Builder for TailCutLayer.
 ///
@@ -31,12 +31,13 @@ use crate::*;
 /// # Examples
 ///
 /// ```no_run
-/// use opendal_core::layers::TailCutLayer;
-/// use std::time::Duration;
+/// # use std::time::Duration;
+/// #
 /// # use opendal_core::services;
 /// # use opendal_core::Operator;
 /// # use opendal_core::Result;
-///
+/// # use opendal_layer_tail_cut::TailCutLayer;
+/// #
 /// # fn main() -> Result<()> {
 /// let layer = TailCutLayer::builder()
 ///     .percentile(95)
@@ -174,12 +175,13 @@ impl TailCutLayerBuilder {
     /// # Examples
     ///
     /// ```no_run
-    /// use opendal_core::layers::TailCutLayer;
-    /// use std::time::Duration;
+    /// # use std::time::Duration;
+    /// #
     /// # use opendal_core::services;
     /// # use opendal_core::Operator;
     /// # use opendal_core::Result;
-    ///
+    /// # use opendal_layer_tail_cut::TailCutLayer;
+    /// #
     /// # fn main() -> Result<()> {
     /// let layer = TailCutLayer::builder()
     ///     .percentile(95)
@@ -235,12 +237,13 @@ struct TailCutConfig {
 /// # Examples
 ///
 /// ```no_run
-/// use opendal_core::layers::TailCutLayer;
-/// use std::time::Duration;
+/// # use std::time::Duration;
+/// #
 /// # use opendal_core::services;
 /// # use opendal_core::Operator;
 /// # use opendal_core::Result;
-///
+/// # use opendal_layer_tail_cut::TailCutLayer;
+/// #
 /// # fn main() -> Result<()> {
 /// let layer = TailCutLayer::builder()
 ///     .percentile(95)
diff --git a/core/src/lib.rs b/core/src/lib.rs
index 594e9d079..433839216 100644
--- a/core/src/lib.rs
+++ b/core/src/lib.rs
@@ -66,4 +66,6 @@ pub mod layers {
     pub use opendal_layer_prometheus::*;
     #[cfg(feature = "layers-prometheus-client")]
     pub use opendal_layer_prometheus_client::*;
+    #[cfg(feature = "layers-tail-cut")]
+    pub use opendal_layer_tail_cut::*;
 }

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