relicense mini-lsm-book to CC BY-NC-SA 4.0 (#118)

* relicense mini-lsm-book to CC BY-NC-SA 4.0

Signed-off-by: Alex Chi Z <iskyzh@gmail.com>

* clearify license

Signed-off-by: Alex Chi Z <iskyzh@gmail.com>

* fix fmt

Signed-off-by: Alex Chi Z <iskyzh@gmail.com>

* fix fmt

Signed-off-by: Alex Chi Z <iskyzh@gmail.com>

---------

Signed-off-by: Alex Chi Z <iskyzh@gmail.com>

mini-lsm-starter/src/bin/compaction-simulator.rs

@@ -1,3 +1,17 @@
+// Copyright (c) 2022-2025 Alex Chi Z
+//
+// Licensed 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.
+
 mod wrapper;
 use wrapper::mini_lsm_wrapper;
 

mini-lsm-starter/src/bin/mini-lsm-cli.rs

@@ -1,3 +1,17 @@
+// Copyright (c) 2022-2025 Alex Chi Z
+//
+// Licensed 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.
+
 mod wrapper;
 
 use rustyline::DefaultEditor;

mini-lsm-starter/src/bin/wrapper.rs

@@ -1,3 +1,17 @@
+// Copyright (c) 2022-2025 Alex Chi Z
+//
+// Licensed 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.
+
 pub mod mini_lsm_wrapper {
     pub use mini_lsm_starter::*;
 }

mini-lsm-starter/src/block.rs

@@ -1,3 +1,17 @@
+// Copyright (c) 2022-2025 Alex Chi Z
+//
+// Licensed 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.
+
 #![allow(unused_variables)] // TODO(you): remove this lint after implementing this mod
 #![allow(dead_code)] // TODO(you): remove this lint after implementing this mod
 

mini-lsm-starter/src/block/builder.rs

@@ -1,3 +1,17 @@
+// Copyright (c) 2022-2025 Alex Chi Z
+//
+// Licensed 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.
+
 #![allow(unused_variables)] // TODO(you): remove this lint after implementing this mod
 #![allow(dead_code)] // TODO(you): remove this lint after implementing this mod
 

mini-lsm-starter/src/block/iterator.rs

@@ -1,3 +1,17 @@
+// Copyright (c) 2022-2025 Alex Chi Z
+//
+// Licensed 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.
+
 #![allow(unused_variables)] // TODO(you): remove this lint after implementing this mod
 #![allow(dead_code)] // TODO(you): remove this lint after implementing this mod
 

mini-lsm-starter/src/compact.rs

@@ -1,4 +1,19 @@
-#![allow(dead_code)] // REMOVE THIS LINE after fully implementing this functionality
+// Copyright (c) 2022-2025 Alex Chi Z
+//
+// Licensed 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.
+
+#![allow(unused_variables)] // TODO(you): remove this lint after implementing this mod
+#![allow(dead_code)] // TODO(you): remove this lint after implementing this mod
 
 mod leveled;
 mod simple_leveled;

mini-lsm-starter/src/compact/leveled.rs

@@ -1,3 +1,17 @@
+// Copyright (c) 2022-2025 Alex Chi Z
+//
+// Licensed 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.
+
 use serde::{Deserialize, Serialize};
 
 use crate::lsm_storage::LsmStorageState;

mini-lsm-starter/src/compact/simple_leveled.rs

@@ -1,3 +1,17 @@
+// Copyright (c) 2022-2025 Alex Chi Z
+//
+// Licensed 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.
+
 use serde::{Deserialize, Serialize};
 
 use crate::lsm_storage::LsmStorageState;

mini-lsm-starter/src/compact/tiered.rs

@@ -1,3 +1,17 @@
+// Copyright (c) 2022-2025 Alex Chi Z
+//
+// Licensed 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.
+
 use serde::{Deserialize, Serialize};
 
 use crate::lsm_storage::LsmStorageState;

mini-lsm-starter/src/debug.rs

@@ -1,3 +1,17 @@
+// Copyright (c) 2022-2025 Alex Chi Z
+//
+// Licensed 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.
+
 use crate::lsm_storage::{LsmStorageInner, MiniLsm};
 
 impl LsmStorageInner {

mini-lsm-starter/src/iterators.rs

@@ -1,3 +1,17 @@
+// Copyright (c) 2022-2025 Alex Chi Z
+//
+// Licensed 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.
+
 pub mod concat_iterator;
 pub mod merge_iterator;
 pub mod two_merge_iterator;

mini-lsm-starter/src/iterators/concat_iterator.rs

@@ -1,3 +1,17 @@
+// Copyright (c) 2022-2025 Alex Chi Z
+//
+// Licensed 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.
+
 #![allow(unused_variables)] // TODO(you): remove this lint after implementing this mod
 #![allow(dead_code)] // TODO(you): remove this lint after implementing this mod
 

mini-lsm-starter/src/iterators/merge_iterator.rs

@@ -1,3 +1,17 @@
+// Copyright (c) 2022-2025 Alex Chi Z
+//
+// Licensed 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.
+
 #![allow(unused_variables)] // TODO(you): remove this lint after implementing this mod
 #![allow(dead_code)] // TODO(you): remove this lint after implementing this mod
 

mini-lsm-starter/src/iterators/two_merge_iterator.rs

@@ -1,3 +1,17 @@
+// Copyright (c) 2022-2025 Alex Chi Z
+//
+// Licensed 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.
+
 #![allow(unused_variables)] // TODO(you): remove this lint after implementing this mod
 #![allow(dead_code)] // TODO(you): remove this lint after implementing this mod
 

mini-lsm-starter/src/key.rs

@@ -1,3 +1,17 @@
+// Copyright (c) 2022-2025 Alex Chi Z
+//
+// Licensed 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.
+
 use std::fmt::Debug;
 
 use bytes::Bytes;

mini-lsm-starter/src/lib.rs

@@ -1,3 +1,17 @@
+// Copyright (c) 2022-2025 Alex Chi Z
+//
+// Licensed 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.
+
 pub mod block;
 pub mod compact;
 pub mod debug;

mini-lsm-starter/src/lsm_iterator.rs

@@ -1,3 +1,17 @@
+// Copyright (c) 2022-2025 Alex Chi Z
+//
+// Licensed 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.
+
 #![allow(unused_variables)] // TODO(you): remove this lint after implementing this mod
 #![allow(dead_code)] // TODO(you): remove this lint after implementing this mod
 

mini-lsm-starter/src/lsm_storage.rs

@@ -1,4 +1,19 @@
-#![allow(dead_code)] // REMOVE THIS LINE after fully implementing this functionality
+// Copyright (c) 2022-2025 Alex Chi Z
+//
+// Licensed 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.
+
+#![allow(unused_variables)] // TODO(you): remove this lint after implementing this mod
+#![allow(dead_code)] // TODO(you): remove this lint after implementing this mod
 
 use std::collections::HashMap;
 use std::ops::Bound;

mini-lsm-starter/src/manifest.rs

@@ -1,4 +1,19 @@
-#![allow(dead_code)] // REMOVE THIS LINE after fully implementing this functionality
+// Copyright (c) 2022-2025 Alex Chi Z
+//
+// Licensed 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.
+
+#![allow(unused_variables)] // TODO(you): remove this lint after implementing this mod
+#![allow(dead_code)] // TODO(you): remove this lint after implementing this mod
 
 use std::fs::File;
 use std::path::Path;

mini-lsm-starter/src/mem_table.rs

@@ -1,4 +1,19 @@
-#![allow(dead_code)] // REMOVE THIS LINE after fully implementing this functionality
+// Copyright (c) 2022-2025 Alex Chi Z
+//
+// Licensed 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.
+
+#![allow(unused_variables)] // TODO(you): remove this lint after implementing this mod
+#![allow(dead_code)] // TODO(you): remove this lint after implementing this mod
 
 use std::ops::Bound;
 use std::path::Path;

mini-lsm-starter/src/mvcc.rs

@@ -1,3 +1,17 @@
+// Copyright (c) 2022-2025 Alex Chi Z
+//
+// Licensed 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.
+
 #![allow(unused_variables)] // TODO(you): remove this lint after implementing this mod
 #![allow(dead_code)] // TODO(you): remove this lint after implementing this mod
 

mini-lsm-starter/src/mvcc/txn.rs

@@ -1,3 +1,17 @@
+// Copyright (c) 2022-2025 Alex Chi Z
+//
+// Licensed 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.
+
 #![allow(unused_variables)] // TODO(you): remove this lint after implementing this mod
 #![allow(dead_code)] // TODO(you): remove this lint after implementing this mod
 

mini-lsm-starter/src/mvcc/watermark.rs

@@ -1,3 +1,17 @@
+// Copyright (c) 2022-2025 Alex Chi Z
+//
+// Licensed 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.
+
 #![allow(unused_variables)] // TODO(you): remove this lint after implementing this mod
 #![allow(dead_code)] // TODO(you): remove this lint after implementing this mod
 

mini-lsm-starter/src/table.rs

@@ -1,3 +1,17 @@
+// Copyright (c) 2022-2025 Alex Chi Z
+//
+// Licensed 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.
+
 #![allow(unused_variables)] // TODO(you): remove this lint after implementing this mod
 #![allow(dead_code)] // TODO(you): remove this lint after implementing this mod
 

mini-lsm-starter/src/table/bloom.rs

@@ -1,3 +1,17 @@
+// Copyright (c) 2022-2025 Alex Chi Z
+//
+// Licensed 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.
+
 // Copyright 2021 TiKV Project Authors. Licensed under Apache-2.0.
 
 use anyhow::Result;

mini-lsm-starter/src/table/builder.rs

@@ -1,3 +1,17 @@
+// Copyright (c) 2022-2025 Alex Chi Z
+//
+// Licensed 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.
+
 #![allow(unused_variables)] // TODO(you): remove this lint after implementing this mod
 #![allow(dead_code)] // TODO(you): remove this lint after implementing this mod
 

mini-lsm-starter/src/table/iterator.rs

@@ -1,3 +1,17 @@
+// Copyright (c) 2022-2025 Alex Chi Z
+//
+// Licensed 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.
+
 #![allow(unused_variables)] // TODO(you): remove this lint after implementing this mod
 #![allow(dead_code)] // TODO(you): remove this lint after implementing this mod
 

mini-lsm-starter/src/tests.rs

@@ -1,2 +1,16 @@
+// Copyright (c) 2022-2025 Alex Chi Z
+//
+// Licensed 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.
+
 //! DO NOT MODIFY -- Mini-LSM tests modules
 //! This file will be automatically rewritten by the copy-test command.

mini-lsm-starter/src/wal.rs

@@ -1,4 +1,20 @@
-#![allow(dead_code)] // REMOVE THIS LINE after fully implementing this functionality
+#![allow(dead_code)]
+// REMOVE THIS LINE after fully implementing this functionality
+// Copyright (c) 2022-2025 Alex Chi Z
+//
+// Licensed 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.
+#![allow(unused_variables)] // TODO(you): remove this lint after implementing this mod
+#![allow(dead_code)] // TODO(you): remove this lint after implementing this mod
 
 use std::fs::File;
 use std::io::BufWriter;