feat: fuzz test support read from .env by different services

core/fuzz/build.sh

@@ -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.
+
+# build fuzz targets
+cd $SRC/opendal/core
+cargo +nightly fuzz build -O --debug-assertions
+
+# copy fuzz targets to $OUT
+
+cp ../target/x86_64-unknown-linux-gnu/release/fuzz_reader $OUT/fuzz_reader_fs
+cp ../target/x86_64-unknown-linux-gnu/release/fuzz_reader $OUT/fuzz_writer_fs
+
+cp ../target/x86_64-unknown-linux-gnu/release/fuzz_reader $OUT/fuzz_reader_mem
+cp ../target/x86_64-unknown-linux-gnu/release/fuzz_reader $OUT/fuzz_writer_mem
+
+# .options files will be used by oss-fuzz to append arguments to the fuzz targets
+echo -e "[libfuzzer]\nOPENDAL_FS_TEST=on\nOPENDAL_FS_ROOT=/tmp" > $SRC/opendal/fuzz_reader_fs.options
+echo -e "[libfuzzer]\nOPENDAL_MEMORY_TEST=on\n" > $SRC/opendal/fuzz_reader_mem.options
+
+echo -e "[libfuzzer]\nOPENDAL_FS_TEST=on\nOPENDAL_FS_ROOT=/tmp" > $SRC/opendal/fuzz_writer_fs.options
+echo -e "[libfuzzer]\nOPENDAL_MEMORY_TEST=on\n" > $SRC/opendal/fuzz_writer_mem.options
+
+# copy .options files to $OUT
+cp $SRC/opendal/fuzz_reader*.options $OUT/
+cp $SRC/opendal/fuzz_writer*.options $OUT/

core/fuzz/fuzz_reader.rs

@@ -256,6 +256,8 @@ async fn fuzz_reader(op: Operator, input: FuzzInput) -> Result<()> {
 fuzz_target!(|input: FuzzInput| {
     let _ = dotenvy::dotenv();
 
+    utils::apply_args_to_env();
+
     let runtime = tokio::runtime::Runtime::new().expect("init runtime must succeed");
 
     for op in utils::init_services() {

core/fuzz/fuzz_writer.rs

@@ -126,6 +126,8 @@ async fn fuzz_writer(op: Operator, input: FuzzInput) -> Result<()> {
 fuzz_target!(|input: FuzzInput| {
     let _ = dotenvy::dotenv();
 
+    utils::apply_args_to_env();
+
     let runtime = tokio::runtime::Runtime::new().expect("init runtime must succeed");
 
     for op in utils::init_services() {

core/fuzz/utils.rs

@@ -20,6 +20,19 @@ use std::env;
 use opendal::Operator;
 use opendal::Scheme;
 
+pub fn apply_args_to_env() {
+    // for oss-fuzz integration, set envs from args
+    // example: -opendal_fs_test=on -> OPENDAL_FS_TEST=on
+    let args: Vec<String> = env::args().collect();
+
+    for arg in &args[1..] {
+        let parts: Vec<&str> = arg[1..].split('=').collect();
+        if parts.len() == 2 {
+            env::set_var(parts[0].to_uppercase(), parts[1]);
+        }
+    }
+}
+
 fn service(scheme: Scheme) -> Option<Operator> {
     let test_key = format!("opendal_{}_test", scheme).to_uppercase();
     if env::var(test_key).unwrap_or_default() != "on" {