feat(services): add cacache backend

.env.example

@@ -120,3 +120,6 @@ OPENDAL_WASABI_SECRET_ACCESS_KEY=<sk>
 OPENDAL_REDB_TEST=false
 OPENDAL_REDB_DATADIR=/tmp/redb
 OPENDAL_REDB_TABLE=redb-table
+# cacache
+OPENDAL_CACACHE_TEST=false
+OPENDAL_CACACHE_DATADIR=/tmp/opendal/cacache/

.github/workflows/service_test_cacache.yml

@@ -0,0 +1,54 @@
+# 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.
+
+name: Service Test Cacache
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+    paths:
+      - "core/src/**"
+      - "core/tests/**"
+      - "!core/src/docs/**"
+      - "!core/src/services/**"
+      - "core/src/services/cacache/**"
+      - ".github/workflows/service_test_cacache.yml"
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}-${{ github.event_name }}
+  cancel-in-progress: true
+
+jobs:
+  cacache:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - name: Setup Rust toolchain
+        uses: ./.github/actions/setup
+      - name: Test cacache
+        shell: bash
+        working-directory: core
+        run: cargo test cacache --features services-cacache -j=1
+        env:
+          RUST_BACKTRACE: full
+          RUST_LOG: debug
+          OPENDAL_CACACHE_TEST: on
+          OPENDAL_CACACHE_DATADIR: /tmp/opendal/cacache/

README.md

@@ -81,6 +81,7 @@ Major components of the project include:
 <details>
 <summary>Key-Value Storage Service (like rocksdb, sled)</summary>
 
+- cacache: [cacache](https://crates.io/crates/cacache) backend
 - dashmap: [dashmap](https://github.com/xacrimon/dashmap) backend
 - memory: In memory backend
 - redis: [Redis](https://redis.io/) services

core/Cargo.toml

@@ -105,6 +105,7 @@ services-azdfs = [
   "reqsign?/services-azblob",
   "reqsign?/reqwest_request",
 ]
+services-cacache = ["dep:cacache"]
 services-cos = [
   "dep:reqsign",
   "reqsign?/services-tencent",
@@ -180,6 +181,7 @@ backon = "0.4.0"
 base64 = "0.21"
 bb8 = { version = "0.8", optional = true }
 bytes = "1.2"
+cacache =  { version = "11.6", default-features = false, features = ["tokio-runtime", "mmap"], optional = true }
 chrono = "0.4.24"
 dashmap = { version = "5.4", optional = true }
 dirs = { version = "5.0.1", optional = true }

core/README.md

@@ -19,6 +19,7 @@
 
 - [azblob](https://docs.rs/opendal/latest/opendal/services/struct.Azblob.html): [Azure Storage Blob](https://azure.microsoft.com/en-us/services/storage/blobs/) services.
 - [azdfs](https://docs.rs/opendal/latest/opendal/services/struct.Azdfs.html): [Azure Data Lake Storage Gen2](https://azure.microsoft.com/en-us/products/storage/data-lake-storage/) services. (As known as [abfs](https://learn.microsoft.com/en-us/azure/storage/blobs/data-lake-storage-abfs-driver))
+- [cacache](https://docs.rs/opendal/latest/opendal/services/struct.Cacache.html): [cacache](https://crates.io/crates/cacache) backend support.
 - [dashmap](https://docs.rs/opendal/latest/opendal/services/struct.Dashmap.html): [dashmap](https://github.com/xacrimon/dashmap) backend support.
 - [fs](https://docs.rs/opendal/latest/opendal/services/struct.Fs.html): POSIX alike file system.
 - [ftp](https://docs.rs/opendal/latest/opendal/services/struct.Ftp.html): FTP and FTPS support.