*: add a CI check for license headers and fix all files

Updates tailscale/tailscale#10992

Signed-off-by: James Tucker <james@tailscale.com>

.github/workflows/license-headers.yml

@@ -0,0 +1,19 @@
+on:
+  push:
+    branches:
+      - "main"
+      - "release-branch/*"
+  pull_request:
+    # all PRs on all branches
+  merge_group:
+    branches:
+      - "main"
+
+jobs:
+  license_headers:
+    runs-on: ubuntu-latest
+    steps:
+      - name: checkout
+        uses: actions/checkout@v4
+      - name: check license headers
+        run: ./scripts/check_license_headers.sh .

android/src/main/java/com/tailscale/ipn/App.java

@@ -1,6 +1,5 @@
-// Copyright (c) 2020 Tailscale Inc & AUTHORS All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
+// Copyright (c) Tailscale Inc & AUTHORS
+// SPDX-License-Identifier: BSD-3-Clause
 
 package com.tailscale.ipn;
 

android/src/main/java/com/tailscale/ipn/DnsConfig.java

@@ -1,6 +1,5 @@
-// Copyright (c) 2021 Tailscale Inc & AUTHORS All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
+// Copyright (c) Tailscale Inc & AUTHORS
+// SPDX-License-Identifier: BSD-3-Clause
 
 package com.tailscale.ipn;
 

android/src/main/java/com/tailscale/ipn/IPNActivity.java

@@ -1,6 +1,5 @@
-// Copyright (c) 2021 Tailscale Inc & AUTHORS All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
+// Copyright (c) Tailscale Inc & AUTHORS
+// SPDX-License-Identifier: BSD-3-Clause
 
 package com.tailscale.ipn;
 

android/src/main/java/com/tailscale/ipn/IPNReceiver.java

@@ -1,6 +1,5 @@
-// Copyright (c) 2023 Tailscale Inc & AUTHORS All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
+// Copyright (c) Tailscale Inc & AUTHORS
+// SPDX-License-Identifier: BSD-3-Clause
 
 package com.tailscale.ipn;
 

android/src/main/java/com/tailscale/ipn/IPNService.java

@@ -1,6 +1,5 @@
-// Copyright (c) 2020 Tailscale Inc & AUTHORS All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
+// Copyright (c) Tailscale Inc & AUTHORS
+// SPDX-License-Identifier: BSD-3-Clause
 
 package com.tailscale.ipn;
 

android/src/main/java/com/tailscale/ipn/Peer.java

@@ -1,6 +1,5 @@
-// Copyright (c) 2020 Tailscale Inc & AUTHORS All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
+// Copyright (c) Tailscale Inc & AUTHORS
+// SPDX-License-Identifier: BSD-3-Clause
 
 package com.tailscale.ipn;
 

android/src/main/java/com/tailscale/ipn/QuickToggleService.java

@@ -1,6 +1,5 @@
-// Copyright (c) 2020 Tailscale Inc & AUTHORS All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
+// Copyright (c) Tailscale Inc & AUTHORS
+// SPDX-License-Identifier: BSD-3-Clause
 
 package com.tailscale.ipn;
 

android/src/main/java/com/tailscale/ipn/StartVPNWorker.java

@@ -1,6 +1,5 @@
-// Copyright (c) 2023 Tailscale Inc & AUTHORS All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
+// Copyright (c) Tailscale Inc & AUTHORS
+// SPDX-License-Identifier: BSD-3-Clause
 
 package com.tailscale.ipn;
 

android/src/main/java/com/tailscale/ipn/StopVPNWorker.java

@@ -1,6 +1,5 @@
-// Copyright (c) 2023 Tailscale Inc & AUTHORS All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
+// Copyright (c) Tailscale Inc & AUTHORS
+// SPDX-License-Identifier: BSD-3-Clause
 
 package com.tailscale.ipn;
 

android/src/main/java/com/tailscale/ipn/ui/localapi/LocalAPIClient.kt

@@ -1,6 +1,5 @@
-// Copyright (c) 2024 Tailscale Inc & AUTHORS All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
+// Copyright (c) Tailscale Inc & AUTHORS
+// SPDX-License-Identifier: BSD-3-Clause
 
 package com.tailscale.ipn.ui.localapi
 

android/src/main/java/com/tailscale/ipn/ui/localapi/LocalAPIRequest.kt

@@ -1,6 +1,5 @@
-// Copyright (c) 2024 Tailscale Inc & AUTHORS All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
+// Copyright (c) Tailscale Inc & AUTHORS
+// SPDX-License-Identifier: BSD-3-Clause
 
 package com.tailscale.ipn.ui.localapi
 

android/src/main/java/com/tailscale/ipn/ui/localapi/Result.kt

@@ -1,6 +1,5 @@
-// Copyright (c) 2024 Tailscale Inc & AUTHORS All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
+// Copyright (c) Tailscale Inc & AUTHORS
+// SPDX-License-Identifier: BSD-3-Clause
 
 package com.tailscale.ipn.ui.localapi
 

android/src/main/java/com/tailscale/ipn/ui/model/Dns.kt

@@ -1,6 +1,5 @@
-// Copyright (c) 2024 Tailscale Inc & AUTHORS All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
+// Copyright (c) Tailscale Inc & AUTHORS
+// SPDX-License-Identifier: BSD-3-Clause
 
 package com.tailscale.ipn.ui.model
 

android/src/main/java/com/tailscale/ipn/ui/model/Ipn.kt

@@ -1,6 +1,5 @@
-// Copyright (c) 2024 Tailscale Inc & AUTHORS All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
+// Copyright (c) Tailscale Inc & AUTHORS
+// SPDX-License-Identifier: BSD-3-Clause
 
 package com.tailscale.ipn.ui.model
 

android/src/main/java/com/tailscale/ipn/ui/model/IpnState.kt

@@ -1,6 +1,5 @@
-// Copyright (c) 2024 Tailscale Inc & AUTHORS All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
+// Copyright (c) Tailscale Inc & AUTHORS
+// SPDX-License-Identifier: BSD-3-Clause
 
 package com.tailscale.ipn.ui.model
 

android/src/main/java/com/tailscale/ipn/ui/model/NetMap.kt

@@ -1,6 +1,5 @@
-// Copyright (c) 2024 Tailscale Inc & AUTHORS All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
+// Copyright (c) Tailscale Inc & AUTHORS
+// SPDX-License-Identifier: BSD-3-Clause
 
 package com.tailscale.ipn.ui.model
 

android/src/main/java/com/tailscale/ipn/ui/model/TailCfg.kt

@@ -1,6 +1,5 @@
-// Copyright (c) 2024 Tailscale Inc & AUTHORS All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
+// Copyright (c) Tailscale Inc & AUTHORS
+// SPDX-License-Identifier: BSD-3-Clause
 
 package com.tailscale.ipn.ui.model
 

android/src/main/java/com/tailscale/ipn/ui/model/Types.kt

@@ -1,6 +1,5 @@
-// Copyright (c) 2024 Tailscale Inc & AUTHORS All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
+// Copyright (c) Tailscale Inc & AUTHORS
+// SPDX-License-Identifier: BSD-3-Clause
 
 package com.tailscale.ipn.ui.model
 

android/src/main/java/com/tailscale/ipn/ui/notifier/Notifier.kt

@@ -1,6 +1,5 @@
-// Copyright (c) 2024 Tailscale Inc & AUTHORS All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
+// Copyright (c) Tailscale Inc & AUTHORS
+// SPDX-License-Identifier: BSD-3-Clause
 
 package com.tailscale.ipn.ui.notifier
 

android/src/main/java/com/tailscale/ipn/ui/service/IpnManager.kt

@@ -1,6 +1,5 @@
-// Copyright (c) 2024 Tailscale Inc & AUTHORS All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
+// Copyright (c) Tailscale Inc & AUTHORS
+// SPDX-License-Identifier: BSD-3-Clause
 
 package com.tailscale.ipn.ui.service
 

android/src/main/java/com/tailscale/ipn/ui/service/IpnModel.kt

@@ -1,6 +1,5 @@
-// Copyright (c) 2024 Tailscale Inc & AUTHORS All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
+// Copyright (c) Tailscale Inc & AUTHORS
+// SPDX-License-Identifier: BSD-3-Clause
 
 package com.tailscale.ipn.ui.service
 

android/src/play/java/com/tailscale/ipn/Google.java

@@ -1,6 +1,5 @@
-// Copyright (c) 2020 Tailscale Inc & AUTHORS All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
+// Copyright (c) Tailscale Inc & AUTHORS
+// SPDX-License-Identifier: BSD-3-Clause
 
 package com.tailscale.ipn;
 

android_legacy/src/main/java/com/tailscale/ipn/App.java

@@ -1,6 +1,5 @@
-// Copyright (c) 2020 Tailscale Inc & AUTHORS All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
+// Copyright (c) Tailscale Inc & AUTHORS
+// SPDX-License-Identifier: BSD-3-Clause
 
 package com.tailscale.ipn;
 

android_legacy/src/main/java/com/tailscale/ipn/DnsConfig.java

@@ -1,6 +1,5 @@
-// Copyright (c) 2021 Tailscale Inc & AUTHORS All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
+// Copyright (c) Tailscale Inc & AUTHORS
+// SPDX-License-Identifier: BSD-3-Clause
 
 package com.tailscale.ipn;
 

android_legacy/src/main/java/com/tailscale/ipn/IPNActivity.java

@@ -1,6 +1,5 @@
-// Copyright (c) 2021 Tailscale Inc & AUTHORS All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
+// Copyright (c) Tailscale Inc & AUTHORS
+// SPDX-License-Identifier: BSD-3-Clause
 
 package com.tailscale.ipn;
 

android_legacy/src/main/java/com/tailscale/ipn/IPNReceiver.java

@@ -1,6 +1,5 @@
-// Copyright (c) 2023 Tailscale Inc & AUTHORS All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
+// Copyright (c) Tailscale Inc & AUTHORS
+// SPDX-License-Identifier: BSD-3-Clause
 
 package com.tailscale.ipn;
 

android_legacy/src/main/java/com/tailscale/ipn/IPNService.java

@@ -1,6 +1,5 @@
-// Copyright (c) 2020 Tailscale Inc & AUTHORS All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
+// Copyright (c) Tailscale Inc & AUTHORS
+// SPDX-License-Identifier: BSD-3-Clause
 
 package com.tailscale.ipn;
 

android_legacy/src/main/java/com/tailscale/ipn/Peer.java

@@ -1,6 +1,5 @@
-// Copyright (c) 2020 Tailscale Inc & AUTHORS All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
+// Copyright (c) Tailscale Inc & AUTHORS
+// SPDX-License-Identifier: BSD-3-Clause
 
 package com.tailscale.ipn;
 

android_legacy/src/main/java/com/tailscale/ipn/QuickToggleService.java

@@ -1,6 +1,5 @@
-// Copyright (c) 2020 Tailscale Inc & AUTHORS All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
+// Copyright (c) Tailscale Inc & AUTHORS
+// SPDX-License-Identifier: BSD-3-Clause
 
 package com.tailscale.ipn;
 

android_legacy/src/main/java/com/tailscale/ipn/StartVPNWorker.java

@@ -1,6 +1,5 @@
-// Copyright (c) 2023 Tailscale Inc & AUTHORS All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
+// Copyright (c) Tailscale Inc & AUTHORS
+// SPDX-License-Identifier: BSD-3-Clause
 
 package com.tailscale.ipn;
 

android_legacy/src/main/java/com/tailscale/ipn/StopVPNWorker.java

@@ -1,6 +1,5 @@
-// Copyright (c) 2023 Tailscale Inc & AUTHORS All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
+// Copyright (c) Tailscale Inc & AUTHORS
+// SPDX-License-Identifier: BSD-3-Clause
 
 package com.tailscale.ipn;
 

android_legacy/src/main/java/com/tailscale/ipn/ui/localapi/LocalAPIClient.kt

@@ -1,6 +1,5 @@
-// Copyright (c) 2024 Tailscale Inc & AUTHORS All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
+// Copyright (c) Tailscale Inc & AUTHORS
+// SPDX-License-Identifier: BSD-3-Clause
 
 package com.tailscale.ipn.ui.localapi
 

android_legacy/src/main/java/com/tailscale/ipn/ui/localapi/LocalAPIRequest.kt

@@ -1,6 +1,5 @@
-// Copyright (c) 2024 Tailscale Inc & AUTHORS All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
+// Copyright (c) Tailscale Inc & AUTHORS
+// SPDX-License-Identifier: BSD-3-Clause
 
 package com.tailscale.ipn.ui.localapi
 

android_legacy/src/main/java/com/tailscale/ipn/ui/localapi/Result.kt

@@ -1,6 +1,5 @@
-// Copyright (c) 2024 Tailscale Inc & AUTHORS All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
+// Copyright (c) Tailscale Inc & AUTHORS
+// SPDX-License-Identifier: BSD-3-Clause
 
 package com.tailscale.ipn.ui.localapi
 

android_legacy/src/play/java/com/tailscale/ipn/Google.java

@@ -1,6 +1,5 @@
-// Copyright (c) 2020 Tailscale Inc & AUTHORS All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
+// Copyright (c) Tailscale Inc & AUTHORS
+// SPDX-License-Identifier: BSD-3-Clause
 
 package com.tailscale.ipn;
 

cmd/jni/jni.go

@@ -1,6 +1,5 @@
-// Copyright (c) 2020 Tailscale Inc & AUTHORS All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
+// Copyright (c) Tailscale Inc & AUTHORS
+// SPDX-License-Identifier: BSD-3-Clause
 
 // Package jni implements various helper functions for communicating with the Android JVM
 // though JNI.

cmd/localapiservice/localapi_test.go

@@ -1,3 +1,6 @@
+// Copyright (c) Tailscale Inc & AUTHORS
+// SPDX-License-Identifier: BSD-3-Clause
+
 package localapiservice
 
 import (

cmd/localapiservice/localapiservice.go

@@ -1,3 +1,6 @@
+// Copyright (c) Tailscale Inc & AUTHORS
+// SPDX-License-Identifier: BSD-3-Clause
+
 package localapiservice
 
 import (

cmd/localapiservice/localapishim.go

@@ -1,6 +1,5 @@
-// Copyright (c) 2024 Tailscale Inc & AUTHORS All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
+// Copyright (c) Tailscale Inc & AUTHORS
+// SPDX-License-Identifier: BSD-3-Clause
 
 package localapiservice
 

cmd/localapiservice/response.go

@@ -1,3 +1,6 @@
+// Copyright (c) Tailscale Inc & AUTHORS
+// SPDX-License-Identifier: BSD-3-Clause
+
 package localapiservice
 
 import (

cmd/tailscale/backend.go

@@ -1,6 +1,5 @@
-// Copyright (c) 2020 Tailscale Inc & AUTHORS All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
+// Copyright (c) Tailscale Inc & AUTHORS
+// SPDX-License-Identifier: BSD-3-Clause
 
 package main
 
@@ -15,8 +14,8 @@ import (
 	"strings"
 	"time"
 
-	"github.com/tailscale/wireguard-go/tun"
 	"github.com/tailscale/tailscale-android/cmd/jni"
+	"github.com/tailscale/wireguard-go/tun"
 
 	"golang.org/x/sys/unix"
 	"tailscale.com/ipn"

cmd/tailscale/callbacks.go

@@ -1,6 +1,5 @@
-// Copyright (c) 2020 Tailscale Inc & AUTHORS All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
+// Copyright (c) Tailscale Inc & AUTHORS
+// SPDX-License-Identifier: BSD-3-Clause
 
 package main
 

cmd/tailscale/main.go

@@ -1,6 +1,5 @@
-// Copyright (c) 2020 Tailscale Inc & AUTHORS All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
+// Copyright (c) Tailscale Inc & AUTHORS
+// SPDX-License-Identifier: BSD-3-Clause
 
 package main
 

cmd/tailscale/multitun.go

@@ -1,6 +1,5 @@
-// Copyright (c) 2020 Tailscale Inc & AUTHORS All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
+// Copyright (c) Tailscale Inc & AUTHORS
+// SPDX-License-Identifier: BSD-3-Clause
 
 package main
 

cmd/tailscale/pprof.go

@@ -1,6 +1,5 @@
-// Copyright (c) 2020 Tailscale Inc & AUTHORS All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
+// Copyright (c) Tailscale Inc & AUTHORS
+// SPDX-License-Identifier: BSD-3-Clause
 
 //go:build pprof
 // +build pprof

cmd/tailscale/store.go

@@ -1,6 +1,5 @@
-// Copyright (c) 2020 Tailscale Inc & AUTHORS All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
+// Copyright (c) Tailscale Inc & AUTHORS
+// SPDX-License-Identifier: BSD-3-Clause
 
 package main
 

cmd/tailscale/tools.go

@@ -1,6 +1,5 @@
-// Copyright (c) 2020 Tailscale Inc & AUTHORS All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
+// Copyright (c) Tailscale Inc & AUTHORS
+// SPDX-License-Identifier: BSD-3-Clause
 
 //go:build tools
 // +build tools

cmd/tailscale/ui.go

@@ -1,6 +1,5 @@
-// Copyright (c) 2020 Tailscale Inc & AUTHORS All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
+// Copyright (c) Tailscale Inc & AUTHORS
+// SPDX-License-Identifier: BSD-3-Clause
 
 package main
 

scripts/check_license_headers.sh

@@ -0,0 +1,47 @@
+#!/bin/sh
+#
+# Copyright (c) Tailscale Inc & AUTHORS
+# SPDX-License-Identifier: BSD-3-Clause
+#
+# check_license_headers.sh checks that source files in the given
+# directory tree have a correct-looking Tailscale license header.
+
+check_file() {
+	got=$1
+
+	want=$(
+		cat <<EOF
+// Copyright (c) Tailscale Inc & AUTHORS
+// SPDX-License-Identifier: BSD-3-Clause
+EOF
+	)
+	if [ "$got" = "$want" ]; then
+		return 0
+	fi
+	return 1
+}
+
+if [ $# != 1 ]; then
+	echo "Usage: $0 rootdir" >&2
+	exit 1
+fi
+
+fail=0
+for file in $(find $1 \( -name '*.go' -or -name '*.tsx' -or -name '*.ts' -or -name '*.kt' -or -name '*.java' -not -name '*.config.ts' \) -not -path '*/.git/*' -not -path '*/node_modules/*'); do
+	case $file in
+	*)
+		header="$(head -2 $file)"
+		;;
+	esac
+	if [ ! -z "$header" ]; then
+		if ! check_file "$header"; then
+			fail=1
+			echo "${file#$1/} doesn't have the right copyright header:"
+			echo "$header" | sed -e 's/^/    /g'
+		fi
+	fi
+done
+
+if [ $fail -ne 0 ]; then
+	exit 1
+fi