Standardize copyright headers. (#2399)

The Linebender standard for copyright headers was decided last year in
[kurbo#207](linebender/kurbo#207) as the
following:

```
// Copyright <year of file creation> the <Project> Authors
// SPDX-License-Identifier: Apache-2.0 OR MIT
```

This PR converts all file headers to this standard form. Note that Druid
is not dual licensed under MIT and is Apache 2.0 only.

.github/copyright.sh

@@ -0,0 +1,23 @@
+#!/bin/bash
+
+# If there are new files with headers that can't match the conditions here,
+# then the files can be ignored by an additional glob argument via the -g flag.
+# For example:
+#   -g "!src/special_file.rs"
+#   -g "!src/special_directory"
+
+# Check all the standard Rust source files
+output=$(rg "^// Copyright (19|20)[\d]{2} (.+ and )?the Druid Authors( and .+)?$\n^// SPDX-License-Identifier: Apache-2\.0$\n\n" --files-without-match --multiline -g "*.rs" -g "!{druid-derive/tests/ui,docs/book_examples/src}" .)
+
+if [ -n "$output" ]; then
+	echo -e "The following files lack the correct copyright header:\n"
+	echo $output
+	echo -e "\n\nPlease add the following header:\n"
+	echo "// Copyright $(date +%Y) the Druid Authors"
+	echo "// SPDX-License-Identifier: Apache-2.0"
+	echo -e "\n... rest of the file ...\n"
+	exit 1
+fi
+
+echo "All files have correct copyright headers."
+exit 0

.github/workflows/ci.yml

@@ -27,6 +27,14 @@ jobs:
       - name: cargo fmt
         run: cargo fmt --all --check
 
+      - name: install ripgrep
+        run: |
+          sudo apt update
+          sudo apt install ripgrep
+
+      - name: check copyright headers
+        run: bash .github/copyright.sh
+
   test-stable:
     runs-on: ${{ matrix.os }}
     strategy:

AUTHORS

@@ -1,8 +1,9 @@
-# This is the list of Druid authors for copyright purposes.
+# This is the list of Druid's significant contributors.
 #
-# This does not necessarily list everyone who has contributed code, since in
-# some cases, their employer may be the copyright holder.  To see the full list
-# of contributors, see the revision history in source control.
+# This does not necessarily list everyone who has contributed code,
+# especially since many employees of one corporation may be contributing.
+# To see the full list of contributors, see the revision history in
+# source control.
 Google LLC
 Raph Levien
 Hilmar Gústafsson

druid-derive/src/attr.rs

@@ -1,16 +1,5 @@
-// Copyright 2019 The Druid Authors.
-//
-// 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 2019 the Druid Authors
+// SPDX-License-Identifier: Apache-2.0
 
 //! parsing #[druid(attributes)]
 

druid-derive/src/data.rs

@@ -1,16 +1,5 @@
-// Copyright 2019 The Druid Authors.
-//
-// 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 2019 the Druid Authors
+// SPDX-License-Identifier: Apache-2.0
 
 //! The implementation for #[derive(Data)]
 

druid-derive/src/lens.rs

@@ -1,16 +1,5 @@
-// Copyright 2019 The Druid Authors.
-//
-// 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 2019 the Druid Authors
+// SPDX-License-Identifier: Apache-2.0
 
 use super::attr::{FieldKind, Fields, LensAttrs};
 use proc_macro2::{Ident, Span};

druid-derive/src/lib.rs

@@ -1,16 +1,5 @@
-// Copyright 2019 The Druid Authors.
-//
-// 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 2019 the Druid Authors
+// SPDX-License-Identifier: Apache-2.0
 
 //! derive macros for Druid.
 

druid-derive/tests/data.rs

@@ -1,16 +1,5 @@
-// Copyright 2019 The Druid Authors.
-//
-// 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 2019 the Druid Authors
+// SPDX-License-Identifier: Apache-2.0
 
 //! Test #[derive(Data)]
 

druid-derive/tests/ignore.rs

@@ -1,16 +1,5 @@
-// Copyright 2019 The Druid Authors.
-//
-// 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 2019 the Druid Authors
+// SPDX-License-Identifier: Apache-2.0
 
 //! testing the ignore attribute
 

druid-derive/tests/lens_generic.rs

@@ -1,16 +1,5 @@
-// Copyright 2020 The Druid Authors.
-//
-// 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 2020 the Druid Authors
+// SPDX-License-Identifier: Apache-2.0
 
 use druid::{Lens, LensExt};
 use std::fmt::Debug;

druid-derive/tests/ui.rs

@@ -1,16 +1,5 @@
-// Copyright 2021 The Druid Authors.
-//
-// 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 the Druid Authors
+// SPDX-License-Identifier: Apache-2.0
 
 // https://github.com/dtolnay/trybuild
 // trybuild is a crate that essentially runs cargo on the provided files, and checks the output.

druid-derive/tests/with_lens.rs

@@ -1,16 +1,5 @@
-// Copyright 2020 The Druid Authors.
-//
-// 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 2020 the Druid Authors
+// SPDX-License-Identifier: Apache-2.0
 
 use float_cmp::assert_approx_eq;
 

druid-derive/tests/with_same.rs

@@ -1,16 +1,5 @@
-// Copyright 2019 The Druid Authors.
-//
-// 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 2019 the Druid Authors
+// SPDX-License-Identifier: Apache-2.0
 
 use druid::Data;
 

druid-shell/build.rs

@@ -1,16 +1,5 @@
-// Copyright 2021 The Druid Authors.
-//
-// 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 the Druid Authors
+// SPDX-License-Identifier: Apache-2.0
 
 #[cfg(not(any(feature = "x11", feature = "wayland")))]
 fn main() {}

druid-shell/examples/edit_text.rs

@@ -1,16 +1,5 @@
-// Copyright 2020 The Druid Authors.
-//
-// 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 2020 the Druid Authors
+// SPDX-License-Identifier: Apache-2.0
 
 //! This example shows a how a single-line text field might be implemented for `druid-shell`.
 //! Beyond the omission of multiple lines and text wrapping, it also is missing many motions

druid-shell/examples/invalidate.rs

@@ -1,16 +1,5 @@
-// Copyright 2020 The Druid Authors.
-//
-// 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 2020 the Druid Authors
+// SPDX-License-Identifier: Apache-2.0
 
 use std::any::Any;
 

druid-shell/examples/perftest.rs

@@ -1,20 +1,8 @@
-// Copyright 2018 The Druid Authors.
-//
-// 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 2018 the Druid Authors
+// SPDX-License-Identifier: Apache-2.0
 
 use std::any::Any;
-
-use time::Instant;
+use std::time::Instant;
 
 use piet_common::kurbo::{Line, Size};
 use piet_common::{Color, FontFamily, Piet, RenderContext, Text, TextLayoutBuilder};
@@ -53,7 +41,7 @@ impl WinHandler for PerfTest {
             1.0,
         );
 
-        let current_ns = (Instant::now() - self.start_time).whole_nanoseconds();
+        let current_ns = (Instant::now() - self.start_time).as_nanos();
         let th = ::std::f64::consts::PI * (current_ns as f64) * 2e-9;
         let dx = 100.0 * th.sin();
         let dy = 100.0 * th.cos();
@@ -64,7 +52,7 @@ impl WinHandler for PerfTest {
         );
 
         let now = Instant::now();
-        let msg = format!("{}ms", (now - self.last_time).whole_milliseconds());
+        let msg = format!("{}ms", (now - self.last_time).as_millis());
         self.last_time = now;
         let layout = piet
             .text()
@@ -142,8 +130,8 @@ fn main() {
     let perf_test = PerfTest {
         size: Size::ZERO,
         handle: Default::default(),
-        start_time: time::Instant::now(),
-        last_time: time::Instant::now(),
+        start_time: Instant::now(),
+        last_time: Instant::now(),
         red: true,
     };
     builder.set_handler(Box::new(perf_test));

druid-shell/examples/quit.rs

@@ -1,16 +1,5 @@
-// Copyright 2020 The Druid Authors.
-//
-// 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 2020 the Druid Authors
+// SPDX-License-Identifier: Apache-2.0
 
 use std::any::Any;
 

druid-shell/examples/shello.rs

@@ -1,16 +1,5 @@
-// Copyright 2018 The Druid Authors.
-//
-// 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 2018 the Druid Authors
+// SPDX-License-Identifier: Apache-2.0
 
 use std::any::Any;