chore: add copyright_checker tool and add the missing copyright (#17285)

bench_util/benches/op_baseline.rs

@@ -1,3 +1,5 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+
 use deno_bench_util::bench_or_profile;
 use deno_bench_util::bencher::{benchmark_group, Bencher};
 use deno_bench_util::{bench_js_async, bench_js_sync};

bench_util/benches/utf8.rs

@@ -1,3 +1,5 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+
 use deno_bench_util::bench_js_sync_with;
 use deno_bench_util::bench_or_profile;
 use deno_bench_util::bencher::benchmark_group;

cli/bench/http/deno_http_flash_ops_spawn.js

@@ -1,3 +1,5 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+
 if (Deno.build.os !== "linux") {
   throw new Error("SO_REUSEPORT is only supported on Linux");
 }

cli/bench/http/deno_http_flash_spawn.js

@@ -1,3 +1,5 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+
 if (Deno.build.os !== "linux") {
   throw new Error("SO_REUSEPORT is only supported on Linux");
 }

cli/bench/http/deno_http_native_headers.js

@@ -1,3 +1,5 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+
 const addr = Deno.args[0] || "127.0.0.1:4500";
 const [hostname, port] = addr.split(":");
 const listener = Deno.listen({ hostname, port: Number(port) });

cli/bench/http/deno_http_ops.js

@@ -1,3 +1,5 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+
 const addr = Deno.args[0] || "127.0.0.1:4500";
 const [hostname, port] = addr.split(":");
 const tcp = Deno.listen({ hostname, port: Number(port) });

cli/bench/http/node_reactdom_ssr.js

@@ -1,3 +1,5 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+
 var Gd = Object.create;
 var Ac = Object.defineProperty;
 var Xd = Object.getOwnPropertyDescriptor;

cli/bench/napi/bench.js

@@ -1,3 +1,5 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+
 import { loadTestLibrary } from "../../../test_napi/common.js";
 
 const lib = loadTestLibrary();

cli/bench/stdio/stdio.js

@@ -1,5 +1,6 @@
-// From https://github.com/just-js/benchmarks/tree/main/01-stdio
 // Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+//
+// From https://github.com/just-js/benchmarks/tree/main/01-stdio
 
 const blocksize = parseInt(Deno.args[0] || 65536);
 const buf = new Uint8Array(blocksize);

cli/cache/parsed_source.rs

@@ -1,3 +1,5 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+
 use std::collections::HashMap;
 use std::path::Path;
 use std::path::PathBuf;

cli/js.rs

@@ -1,3 +1,5 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+
 use deno_core::Snapshot;
 use log::debug;
 use once_cell::sync::Lazy;

cli/lsp/client.rs

@@ -1,3 +1,5 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+
 use std::future::Future;
 use std::pin::Pin;
 use std::sync::Arc;

cli/ops/bench.rs

@@ -1,6 +1,9 @@
-use crate::tools::bench::BenchDescription;
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
-use crate::tools::bench::BenchEvent;
+
-use crate::tools::test::TestFilter;
+use std::sync::atomic::AtomicUsize;
+use std::sync::atomic::Ordering;
+use std::time;
+
 use deno_core::error::generic_error;
 use deno_core::error::AnyError;
 use deno_core::op;
@@ -12,12 +15,13 @@ use deno_runtime::permissions::ChildPermissionsArg;
 use deno_runtime::permissions::PermissionsContainer;
 use serde::Deserialize;
 use serde::Serialize;
-use std::sync::atomic::AtomicUsize;
-use std::sync::atomic::Ordering;
-use std::time;
 use tokio::sync::mpsc::UnboundedSender;
 use uuid::Uuid;
 
+use crate::tools::bench::BenchDescription;
+use crate::tools::bench::BenchEvent;
+use crate::tools::test::TestFilter;
+
 pub fn init(
   sender: UnboundedSender<BenchEvent>,
   filter: TestFilter,

cli/tests/unit/abort_controller_test.ts

@@ -1,3 +1,5 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+
 import { assert, assertEquals } from "./test_util.ts";
 
 Deno.test(function basicAbortController() {

cli/tests/unit/command_test.ts

@@ -1,4 +1,5 @@
-// Copyright 2018-2021 the Deno authors. All rights reserved. MIT license.
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+
 import {
   assert,
   assertEquals,

cli/tests/unit/dom_exception_test.ts

@@ -1,3 +1,5 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+
 import {
   assertEquals,
   assertNotEquals,

cli/tests/unit/fs_events_test.ts

@@ -1,4 +1,5 @@
-// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+
 import { assert, assertEquals, assertThrows, delay } from "./test_util.ts";
 
 // TODO(ry) Add more tests to specify format.

cli/tests/unit/network_interfaces_test.ts

@@ -1,3 +1,5 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+
 import { assert } from "./test_util.ts";
 
 Deno.test(

cli/tests/unit/opcall_test.ts

@@ -1,3 +1,5 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+
 import { assert, assertStringIncludes, unreachable } from "./test_util.ts";
 
 Deno.test(async function sendAsyncStackTrace() {

cli/tests/unit/path_from_url_test.ts

@@ -1,3 +1,5 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+
 import { assertEquals, assertThrows } from "./test_util.ts";
 
 // @ts-expect-error TypeScript (as of 3.7) does not support indexing namespaces by symbol

cli/tests/unit/read_text_file_test.ts

@@ -1,3 +1,5 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+
 import {
   assert,
   assertEquals,

cli/tests/unit/ref_unref_test.ts

@@ -1,3 +1,5 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+
 import { assertNotEquals, execCode } from "./test_util.ts";
 
 Deno.test("[unrefOp] unref'ing invalid ops does not have effects", async () => {

cli/tests/unit/structured_clone_test.ts

@@ -1,3 +1,5 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+
 import { assert, assertEquals, assertThrows } from "./test_util.ts";
 
 // Basic tests for the structured clone algorithm. Mainly tests TypeScript

cli/tests/unit/version_test.ts

@@ -1,3 +1,5 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+
 import { assert, assertEquals } from "./test_util.ts";
 
 Deno.test(function version() {

cli/tests/unit/wasm_test.ts

@@ -1,3 +1,5 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+
 import { assert, assertEquals, assertRejects } from "./test_util.ts";
 
 // The following blob can be created by taking the following s-expr and pass

cli/tests/unit/webcrypto_test.ts

@@ -1,3 +1,5 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+
 import {
   assert,
   assertEquals,

cli/tests/unit/webgpu_test.ts

@@ -1,3 +1,5 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+
 import { assert, assertEquals } from "./test_util.ts";
 
 let isCI: boolean;

cli/tests/unit/write_text_file_test.ts

@@ -1,3 +1,5 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+
 import {
   assert,
   assertEquals,

cli/tools/coverage/merge.rs

@@ -1,6 +1,7 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+//
 // Forked from https://github.com/demurgos/v8-coverage/tree/d0ca18da8740198681e0bc68971b0a6cdb11db3e/rust
 // Copyright 2021 Charles Samborski. All rights reserved. MIT license.
-// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
 
 use super::json_types::CoverageRange;
 use super::json_types::FunctionCoverage;

cli/tools/coverage/range_tree.rs

@@ -1,6 +1,7 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+//
 // Forked from https://github.com/demurgos/v8-coverage/tree/d0ca18da8740198681e0bc68971b0a6cdb11db3e/rust
 // Copyright 2021 Charles Samborski. All rights reserved. MIT license.
-// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
 
 use super::json_types::CoverageRange;
 use std::iter::Peekable;

cli/util/console.rs

@@ -1,3 +1,5 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+
 use deno_runtime::ops::tty::ConsoleSize;
 
 /// Gets the console size.

cli/util/path.rs

@@ -1,3 +1,5 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+
 use std::borrow::Cow;
 use std::path::Path;
 use std::path::PathBuf;

cli/worker.rs

@@ -1,3 +1,5 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+
 use std::path::PathBuf;
 use std::rc::Rc;
 use std::sync::Arc;

core/error_codes.rs

@@ -1,3 +1,5 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+
 use anyhow::Error;
 
 pub fn get_error_code(err: &Error) -> Option<&'static str> {

core/snapshot_util.rs

@@ -1,9 +1,12 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+
+use std::path::Path;
+use std::path::PathBuf;
+
 use crate::Extension;
 use crate::JsRuntime;
 use crate::RuntimeOptions;
 use crate::Snapshot;
-use std::path::Path;
-use std::path::PathBuf;
 
 pub type CompressionCb = dyn Fn(&mut Vec<u8>, &[u8]);
 

ext/broadcast_channel/in_memory_broadcast_channel.rs

@@ -1,14 +1,16 @@
 // Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
 
-use crate::BroadcastChannel;
+use std::sync::Arc;
+
 use async_trait::async_trait;
 use deno_core::error::AnyError;
 use deno_core::parking_lot::Mutex;
-use std::sync::Arc;
 use tokio::sync::broadcast;
 use tokio::sync::mpsc;
 use uuid::Uuid;
 
+use crate::BroadcastChannel;
+
 #[derive(Clone)]
 pub struct InMemoryBroadcastChannel(Arc<Mutex<broadcast::Sender<Message>>>);
 

ext/crypto/decrypt.rs

@@ -1,4 +1,5 @@
-use crate::shared::*;
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+
 use aes::cipher::block_padding::Pkcs7;
 use aes::cipher::BlockDecryptMut;
 use aes::cipher::KeyIvInit;
@@ -29,6 +30,8 @@ use sha2::Sha256;
 use sha2::Sha384;
 use sha2::Sha512;
 
+use crate::shared::*;
+
 #[derive(Deserialize)]
 #[serde(rename_all = "camelCase")]
 pub struct DecryptOptions {

ext/crypto/ed25519.rs

@@ -1,3 +1,5 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+
 use deno_core::error::AnyError;
 use deno_core::op;
 use deno_core::ZeroCopyBuf;

ext/crypto/encrypt.rs

@@ -1,4 +1,4 @@
-use crate::shared::*;
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
 
 use aes::cipher::block_padding::Pkcs7;
 use aes::cipher::BlockEncryptMut;
@@ -31,6 +31,8 @@ use sha2::Sha256;
 use sha2::Sha384;
 use sha2::Sha512;
 
+use crate::shared::*;
+
 #[derive(Deserialize)]
 #[serde(rename_all = "camelCase")]
 pub struct EncryptOptions {

ext/crypto/export_key.rs

@@ -1,4 +1,5 @@
-use crate::shared::*;
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+
 use const_oid::AssociatedOid;
 use const_oid::ObjectIdentifier;
 use deno_core::error::custom_error;
@@ -15,6 +16,8 @@ use spki::der::Decode;
 use spki::der::Encode;
 use spki::AlgorithmIdentifier;
 
+use crate::shared::*;
+
 #[derive(Deserialize)]
 #[serde(rename_all = "camelCase")]
 pub struct ExportKeyOptions {

ext/crypto/generate_key.rs

@@ -1,4 +1,5 @@
-use crate::shared::*;
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+
 use deno_core::error::AnyError;
 use deno_core::op;
 use deno_core::ZeroCopyBuf;
@@ -12,6 +13,8 @@ use rsa::BigUint;
 use rsa::RsaPrivateKey;
 use serde::Deserialize;
 
+use crate::shared::*;
+
 // Allowlist for RSA public exponents.
 static PUB_EXPONENT_1: Lazy<BigUint> =
   Lazy::new(|| BigUint::from_u64(3).unwrap());

ext/crypto/import_key.rs

@@ -1,5 +1,5 @@
-use crate::key::CryptoNamedCurve;
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
-use crate::shared::*;
+
 use deno_core::error::AnyError;
 use deno_core::op;
 use deno_core::ZeroCopyBuf;
@@ -12,6 +12,9 @@ use serde::Serialize;
 use spki::der::Decode;
 use spki::der::Encode;
 
+use crate::key::CryptoNamedCurve;
+use crate::shared::*;
+
 #[derive(Deserialize)]
 #[serde(rename_all = "camelCase")]
 pub enum KeyData {

ext/crypto/shared.rs

@@ -1,3 +1,5 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+
 use std::borrow::Cow;
 
 use deno_core::error::custom_error;

ext/crypto/x25519.rs

@@ -1,3 +1,5 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+
 use curve25519_dalek::montgomery::MontgomeryPoint;
 use deno_core::error::AnyError;
 use deno_core::op;

ext/flash/chunked.rs

@@ -1,7 +1,8 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+//
 // Based on https://github.com/frewsxcv/rust-chunked-transfer/blob/5c08614458580f9e7a85124021006d83ce1ed6e9/src/decoder.rs
 // Copyright 2015 The tiny-http Contributors
 // Copyright 2015 The rust-chunked-transfer Contributors
-// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
 
 use std::error::Error;
 use std::fmt;

ext/flash/sendfile.rs

@@ -1,5 +1,5 @@
-// Forked from https://github.com/Thomasdezeeuw/sendfile/blob/024f82cd4dede9048392a5bd6d8afcd4d5aa83d5/src/lib.rs
 // Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+// Forked from https://github.com/Thomasdezeeuw/sendfile/blob/024f82cd4dede9048392a5bd6d8afcd4d5aa83d5/src/lib.rs
 
 use std::future::Future;
 use std::io;

ext/flash/socket.rs

@@ -1,12 +1,13 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+
+use std::cell::UnsafeCell;
+use std::future::Future;
+use std::io::{Read, Write};
+use std::pin::Pin;
+use std::sync::{Arc, Mutex};
+
 use deno_core::error::AnyError;
 use mio::net::TcpStream;
-use std::{
-  cell::UnsafeCell,
-  future::Future,
-  io::{Read, Write},
-  pin::Pin,
-  sync::{Arc, Mutex},
-};
 use tokio::sync::mpsc;
 
 use crate::ParseStatus;

ext/node/module_es_shim.js

@@ -1,3 +1,5 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+
 const m = Deno[Deno.internal].require.Module;
 export const _cache = m._cache;
 export const _extensions = m._extensions;

ext/node/path.rs

@@ -1,3 +1,5 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+
 use std::path::Component;
 use std::path::PathBuf;
 

ext/url/benches/url_ops.rs

@@ -1,3 +1,5 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+
 use deno_bench_util::bench_js_sync;
 use deno_bench_util::bench_or_profile;
 use deno_bench_util::bencher::{benchmark_group, Bencher};

ext/url/urlpattern.rs

@@ -1,3 +1,5 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+
 use deno_core::error::type_error;
 use deno_core::error::AnyError;
 use deno_core::op;

ext/web/benches/encoding.rs

@@ -1,8 +1,9 @@
-use deno_core::Extension;
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
 
 use deno_bench_util::bench_js_sync;
 use deno_bench_util::bench_or_profile;
 use deno_bench_util::bencher::{benchmark_group, Bencher};
+use deno_core::Extension;
 use deno_web::BlobStore;
 
 struct Permissions;

ext/web/benches/timers_ops.rs

@@ -1,8 +1,9 @@
-use deno_core::Extension;
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
 
 use deno_bench_util::bench_js_async;
 use deno_bench_util::bench_or_profile;
 use deno_bench_util::bencher::{benchmark_group, Bencher};
+use deno_core::Extension;
 use deno_web::BlobStore;
 
 struct Permissions;

ext/web/blob.rs

@@ -1,18 +1,19 @@
-use async_trait::async_trait;
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
-use deno_core::error::type_error;
-use deno_core::op;
 
-use deno_core::parking_lot::Mutex;
-use deno_core::url::Url;
-use deno_core::ZeroCopyBuf;
-use serde::{Deserialize, Serialize};
 use std::cell::RefCell;
 use std::collections::HashMap;
 use std::fmt::Debug;
 use std::rc::Rc;
 use std::sync::Arc;
 
+use async_trait::async_trait;
+use deno_core::error::type_error;
 use deno_core::error::AnyError;
+use deno_core::op;
+use deno_core::parking_lot::Mutex;
+use deno_core::url::Url;
+use deno_core::ZeroCopyBuf;
+use serde::{Deserialize, Serialize};
 use uuid::Uuid;
 
 use crate::Location;

ext/web/message_port.rs

@@ -1,3 +1,5 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+
 use std::borrow::Cow;
 use std::cell::RefCell;
 use std::rc::Rc;

ops/fast_call.rs

@@ -1,6 +1,6 @@
-/// Code generation for V8 fast calls.
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
-use crate::optimizer::FastValue;
+//! Code generation for V8 fast calls.
-use crate::optimizer::Optimizer;
+
 use pmutil::{q, Quote, ToTokensExt};
 use proc_macro2::{Span, TokenStream};
 use quote::quote;
@@ -9,6 +9,9 @@ use syn::{
   Ident, ItemFn, ItemImpl, Path, PathArguments, PathSegment, Type, TypePath,
 };
 
+use crate::optimizer::FastValue;
+use crate::optimizer::Optimizer;
+
 pub(crate) struct FastImplItems {
   pub(crate) impl_and_fn: TokenStream,
   pub(crate) decl: TokenStream,

ops/optimizer.rs

@@ -1,10 +1,13 @@
-/// Optimizer for #[op]
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
-use crate::Op;
+//! Optimizer for #[op]
-use pmutil::{q, Quote};
+
-use proc_macro2::TokenStream;
 use std::collections::BTreeMap;
 use std::fmt::Debug;
 use std::fmt::Formatter;
+
+use pmutil::{q, Quote};
+use proc_macro2::TokenStream;
+
 use syn::{
   parse_quote, punctuated::Punctuated, token::Colon2,
   AngleBracketedGenericArguments, FnArg, GenericArgument, PatType, Path,
@@ -12,6 +15,8 @@ use syn::{
   TypeReference, TypeSlice, TypeTuple,
 };
 
+use crate::Op;
+
 #[derive(Debug)]
 pub(crate) enum BailoutReason {
   // Recoverable errors

runtime/js/40_spawn.js

@@ -1,4 +1,4 @@
-// Copyright 2018-2021 the Deno authors. All rights reserved. MIT license.
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
 "use strict";
 
 ((window) => {

runtime/ops/http.rs

@@ -1,3 +1,5 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+
 use std::cell::RefCell;
 use std::rc::Rc;
 

runtime/ops/spawn.rs

@@ -1,4 +1,4 @@
-// Copyright 2018-2021 the Deno authors. All rights reserved. MIT license.
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
 
 use super::io::ChildStderrResource;
 use super::io::ChildStdinResource;

serde_v8/magic/u16string.rs

@@ -1,6 +1,9 @@
-use super::transl8::{impl_magic, impl_wrapper, FromV8, ToV8};
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+
 use crate::Error;
 
+use super::transl8::{impl_magic, impl_wrapper, FromV8, ToV8};
+
 impl_wrapper!(
   pub struct U16String(Vec<u16>);
 );

test_ffi/tests/event_loop_integration.ts

@@ -1,3 +1,5 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+
 const targetDir = Deno.execPath().replace(/[^\/\\]+$/, "");
 const [libPrefix, libSuffix] = {
   darwin: ["lib", "dylib"],

test_napi/src/primitives.rs

@@ -1,3 +1,5 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+
 use crate::assert_napi_ok;
 use crate::napi_new_property;
 use napi_sys::*;

test_util/src/assertions.rs

@@ -1,3 +1,5 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+
 #[macro_export]
 macro_rules! assert_ends_with {
   ($left:expr, $right:expr $(,)?) => {

test_util/src/npm.rs

@@ -1,3 +1,5 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+
 use std::collections::HashMap;
 use std::fs;
 

test_util/src/pty.rs

@@ -1,3 +1,5 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+
 use std::collections::HashMap;
 use std::io::Read;
 use std::path::Path;

test_util/src/temp_dir.rs

@@ -1,3 +1,5 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+
 use std::fs;
 use std::path::Path;
 use std::path::PathBuf;

tools/README.md

@@ -72,3 +72,16 @@ on top, somewhat similar to `git subtree`.
 2. Run `./tools/wgpu_sync.js`
 3. Double check changes, possibly patch
 4. Commit & send a PR with the updates
+
+## copyright_checker.js
+
+`copyright_checker.js` is used to check copyright headers in the codebase.
+
+To run the _copyright checker_:
+
+```sh
+deno run --allow-read --allow-run --unstable  ./tools/copyright_checker.js
+```
+
+Then it will check all code files in the repository and report any files that
+are not properly licensed.

tools/copyright_checker.js

@@ -0,0 +1,84 @@
+#!/usr/bin/env -S deno run --unstable --allow-read --allow-run
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+
+import { getSources, ROOT_PATH } from "./util.js";
+
+const buffer = new Uint8Array(1024);
+const textDecoder = new TextDecoder();
+
+async function readFirstPartOfFile(filePath) {
+  const file = await Deno.open(filePath, { read: true });
+  try {
+    const byteCount = await file.read(buffer);
+    return textDecoder.decode(buffer.slice(0, byteCount ?? 0));
+  } finally {
+    file.close();
+  }
+}
+
+async function checkCopyright() {
+  const sourceFiles = await getSources(ROOT_PATH, [
+    // js and ts
+    "*.js",
+    "*.ts",
+    ":!:.github/mtime_cache/action.js",
+    ":!:cli/tests/testdata/**",
+    ":!:cli/bench/testdata/**",
+    ":!:cli/tsc/dts/**",
+    ":!:cli/tsc/*typescript.js",
+    ":!:cli/tsc/compiler.d.ts",
+    ":!:test_util/wpt/**",
+    ":!:tools/**", // these files are starts with `#!/usr/bin/env`
+    ":!:cli/tools/init/templates/**",
+
+    // rust
+    "*.rs",
+    ":!:ops/optimizer_tests/**",
+
+    // toml
+    "*Cargo.toml",
+  ]);
+
+  let totalCount = 0;
+  const sourceFilesSet = new Set(sourceFiles);
+
+  for (const file of sourceFilesSet) {
+    const ERROR_MSG = "Copyright header is missing: ";
+
+    const fileText = await readFirstPartOfFile(file);
+    if (file.endsWith("Cargo.toml")) {
+      if (
+        !fileText.startsWith(
+          "# Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.",
+        )
+      ) {
+        console.log(ERROR_MSG + file);
+        totalCount += 1;
+      }
+      continue;
+    }
+
+    if (
+      !fileText.startsWith(
+        "// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.",
+      )
+    ) {
+      console.log(ERROR_MSG + file);
+      totalCount += 1;
+    }
+  }
+
+  console.log("\nTotal errors: " + totalCount);
+
+  if (totalCount > 0) {
+    Deno.exit(1);
+  }
+}
+
+async function main() {
+  await Deno.chdir(ROOT_PATH);
+
+  await checkCopyright();
+}
+
+await main();