chore(nixery): Housekeeping for depot compatibility r/3982

Cleans up a whole bunch of things I wanted to get out of the door
right away:

* depot internal references to //third_party/nixery have been replaced
  with //tools/nixery
* cleaned up files from Github
* fixed SPDX & Copyright headers
* code formatting and inclusion in //tools/depotfmt checks

Change-Id: Iea79f0fdf3aa04f71741d4f4032f88605ae415bb
Reviewed-on: https://cl.tvl.fyi/c/depot/+/5486
Tested-by: BuildkiteCI
Reviewed-by: tazjin <tazjin@tvl.su>
Autosubmit: tazjin <tazjin@tvl.su>

5 files changed, 10 insertions, 65 deletions

diff --git a/tools/nixery/builder/archive.go b/tools/nixery/builder/archive.go
index ff822e389a..3bc02ab4d5 100644
--- a/tools/nixery/builder/archive.go
+++ b/tools/nixery/builder/archive.go
@@ -1,16 +1,5 @@
-// Copyright 2019 Google LLC
-//
-// 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
-//
-//     https://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 2022 The TVL Contributors
+// SPDX-License-Identifier: Apache-2.0
 package builder
 
 // This file implements logic for walking through a directory and creating a
diff --git a/tools/nixery/builder/builder.go b/tools/nixery/builder/builder.go
index 4279cb0a11..37c9b9fcb7 100644
--- a/tools/nixery/builder/builder.go
+++ b/tools/nixery/builder/builder.go
@@ -1,16 +1,5 @@
-// Copyright 2019 Google LLC
-//
-// 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
-//
-//     https://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 2022 The TVL Contributors
+// SPDX-License-Identifier: Apache-2.0
 
 // Package builder implements the logic for assembling container
 // images. It shells out to Nix to retrieve all required Nix-packages
diff --git a/tools/nixery/builder/builder_test.go b/tools/nixery/builder/builder_test.go
index 3fbe2ab40e..507f3eb15a 100644
--- a/tools/nixery/builder/builder_test.go
+++ b/tools/nixery/builder/builder_test.go
@@ -1,16 +1,5 @@
-// Copyright 2019 Google LLC
-//
-// 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
-//
-//     https://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 2022 The TVL Contributors
+// SPDX-License-Identifier: Apache-2.0
 package builder
 
 import (
diff --git a/tools/nixery/builder/cache.go b/tools/nixery/builder/cache.go
index 35b563e524..9e4283c0e5 100644
--- a/tools/nixery/builder/cache.go
+++ b/tools/nixery/builder/cache.go
@@ -1,16 +1,5 @@
-// Copyright 2019 Google LLC
-//
-// 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
-//
-//     https://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 2022 The TVL Contributors
+// SPDX-License-Identifier: Apache-2.0
 package builder
 
 import (
diff --git a/tools/nixery/builder/layers.go b/tools/nixery/builder/layers.go
index f769e43c58..5e37e62681 100644
--- a/tools/nixery/builder/layers.go
+++ b/tools/nixery/builder/layers.go
@@ -1,16 +1,5 @@
-// Copyright 2019 Google LLC
-//
-// 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
-//
-//     https://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 2022 The TVL Contributors
+// SPDX-License-Identifier: Apache-2.0
 
 // This package reads an export reference graph (i.e. a graph representing the
 // runtime dependencies of a set of derivations) created by Nix and groups it in