From 239b7cce74ed066dc362843d39bbaf3353f5027d Mon Sep 17 00:00:00 2001
From: Denton Gentry <dgentry@tailscale.com>
Date: Sun, 1 Jan 2023 15:53:03 -0800
Subject: [PATCH] util/codegen: Remove year from copyright header.

Copyright notices in software are not supposed to update
the year in the header.

Because we have a CI check for `go generate`, we're failing
CI until we go update all of the copyright headers in
generated files to say 2023.

Instead, relax the requirement to always have a year in the
copyright header.

Fixes https://github.com/tailscale/tailscale/issues/6865

Signed-off-by: Denton Gentry <dgentry@tailscale.com>
---
 cmd/viewer/tests/tests_clone.go  |  2 +-
 cmd/viewer/tests/tests_view.go   |  2 +-
 ipn/ipn_clone.go                 |  2 +-
 ipn/ipn_view.go                  |  2 +-
 ipn/ipnstate/ipnstate_clone.go   |  2 +-
 scripts/check_license_headers.sh | 15 ++++++++++++++-
 tailcfg/tailcfg_clone.go         |  2 +-
 tailcfg/tailcfg_view.go          |  2 +-
 types/dnstype/dnstype_clone.go   |  2 +-
 types/dnstype/dnstype_view.go    |  2 +-
 types/persist/persist_clone.go   |  2 +-
 types/persist/persist_view.go    |  2 +-
 util/codegen/codegen.go          |  5 ++---
 wgengine/filter/filter_clone.go  |  2 +-
 wgengine/wgcfg/wgcfg_clone.go    |  2 +-
 15 files changed, 29 insertions(+), 17 deletions(-)

diff --git a/cmd/viewer/tests/tests_clone.go b/cmd/viewer/tests/tests_clone.go
index 8cad5f3f3..8218cbdaa 100644
--- a/cmd/viewer/tests/tests_clone.go
+++ b/cmd/viewer/tests/tests_clone.go
@@ -1,4 +1,4 @@
-// Copyright (c) 2022 Tailscale Inc & AUTHORS All rights reserved.
+// Copyright (c) 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.
 
diff --git a/cmd/viewer/tests/tests_view.go b/cmd/viewer/tests/tests_view.go
index a01853553..cdb7e20c5 100644
--- a/cmd/viewer/tests/tests_view.go
+++ b/cmd/viewer/tests/tests_view.go
@@ -1,4 +1,4 @@
-// Copyright (c) 2022 Tailscale Inc & AUTHORS All rights reserved.
+// Copyright (c) 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.
 
diff --git a/ipn/ipn_clone.go b/ipn/ipn_clone.go
index 8f9bc0567..77abe86d1 100644
--- a/ipn/ipn_clone.go
+++ b/ipn/ipn_clone.go
@@ -1,4 +1,4 @@
-// Copyright (c) 2022 Tailscale Inc & AUTHORS All rights reserved.
+// Copyright (c) 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.
 
diff --git a/ipn/ipn_view.go b/ipn/ipn_view.go
index 2209cb0a1..04317b327 100644
--- a/ipn/ipn_view.go
+++ b/ipn/ipn_view.go
@@ -1,4 +1,4 @@
-// Copyright (c) 2022 Tailscale Inc & AUTHORS All rights reserved.
+// Copyright (c) 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.
 
diff --git a/ipn/ipnstate/ipnstate_clone.go b/ipn/ipnstate/ipnstate_clone.go
index 52d8d6c7e..baad64af1 100644
--- a/ipn/ipnstate/ipnstate_clone.go
+++ b/ipn/ipnstate/ipnstate_clone.go
@@ -1,4 +1,4 @@
-// Copyright (c) 2022 Tailscale Inc & AUTHORS All rights reserved.
+// Copyright (c) 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.
 
diff --git a/scripts/check_license_headers.sh b/scripts/check_license_headers.sh
index 84e561ce5..7ee6284cd 100755
--- a/scripts/check_license_headers.sh
+++ b/scripts/check_license_headers.sh
@@ -10,7 +10,7 @@
 check_file() {
     got=$1
 
-    for year in `seq 2019 2022`; do
+    for year in `seq 2019 2023`; do
         want=$(cat <<EOF
 // Copyright (c) $year Tailscale Inc & AUTHORS All rights reserved.
 // Use of this source code is governed by a BSD-style
@@ -21,6 +21,19 @@ EOF
             return 0
         fi
     done
+
+    # For the benefit of generated files, we also allow no year in
+    # the header. https://github.com/tailscale/tailscale/issues/6865
+    want=$(cat <<EOF
+// Copyright (c) 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.
+EOF
+    )
+    if [ "$got" = "$want" ]; then
+        return 0
+    fi
+
     return 1
 }
 
diff --git a/tailcfg/tailcfg_clone.go b/tailcfg/tailcfg_clone.go
index 098f42489..3eff1be47 100644
--- a/tailcfg/tailcfg_clone.go
+++ b/tailcfg/tailcfg_clone.go
@@ -1,4 +1,4 @@
-// Copyright (c) 2022 Tailscale Inc & AUTHORS All rights reserved.
+// Copyright (c) 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.
 
diff --git a/tailcfg/tailcfg_view.go b/tailcfg/tailcfg_view.go
index eb8d3bb02..274635e2e 100644
--- a/tailcfg/tailcfg_view.go
+++ b/tailcfg/tailcfg_view.go
@@ -1,4 +1,4 @@
-// Copyright (c) 2022 Tailscale Inc & AUTHORS All rights reserved.
+// Copyright (c) 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.
 
diff --git a/types/dnstype/dnstype_clone.go b/types/dnstype/dnstype_clone.go
index 1ea760c4a..f0e694b10 100644
--- a/types/dnstype/dnstype_clone.go
+++ b/types/dnstype/dnstype_clone.go
@@ -1,4 +1,4 @@
-// Copyright (c) 2022 Tailscale Inc & AUTHORS All rights reserved.
+// Copyright (c) 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.
 
diff --git a/types/dnstype/dnstype_view.go b/types/dnstype/dnstype_view.go
index 7f99be2f4..2a053643e 100644
--- a/types/dnstype/dnstype_view.go
+++ b/types/dnstype/dnstype_view.go
@@ -1,4 +1,4 @@
-// Copyright (c) 2022 Tailscale Inc & AUTHORS All rights reserved.
+// Copyright (c) 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.
 
diff --git a/types/persist/persist_clone.go b/types/persist/persist_clone.go
index 82db9c52b..977fd21b4 100644
--- a/types/persist/persist_clone.go
+++ b/types/persist/persist_clone.go
@@ -1,4 +1,4 @@
-// Copyright (c) 2022 Tailscale Inc & AUTHORS All rights reserved.
+// Copyright (c) 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.
 
diff --git a/types/persist/persist_view.go b/types/persist/persist_view.go
index 15355abf4..ca11ac51b 100644
--- a/types/persist/persist_view.go
+++ b/types/persist/persist_view.go
@@ -1,4 +1,4 @@
-// Copyright (c) 2022 Tailscale Inc & AUTHORS All rights reserved.
+// Copyright (c) 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.
 
diff --git a/util/codegen/codegen.go b/util/codegen/codegen.go
index 61ec85de8..7fc575fd4 100644
--- a/util/codegen/codegen.go
+++ b/util/codegen/codegen.go
@@ -15,7 +15,6 @@
 	"os"
 	"reflect"
 	"strings"
-	"time"
 
 	"golang.org/x/tools/go/packages"
 	"golang.org/x/tools/imports"
@@ -54,7 +53,7 @@ func HasNoClone(structTag string) bool {
 	return false
 }
 
-const header = `// Copyright (c) %d Tailscale Inc & AUTHORS All rights reserved.
+const header = `// Copyright (c) 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.
 
@@ -105,7 +104,7 @@ func (it *ImportTracker) Write(w io.Writer) {
 }
 
 func writeHeader(w io.Writer, tool, pkg string) {
-	fmt.Fprintf(w, header, time.Now().Year(), tool, pkg)
+	fmt.Fprintf(w, header, tool, pkg)
 }
 
 // WritePackageFile adds a file with the provided imports and contents to package.
diff --git a/wgengine/filter/filter_clone.go b/wgengine/filter/filter_clone.go
index bbae3c451..272dbef36 100644
--- a/wgengine/filter/filter_clone.go
+++ b/wgengine/filter/filter_clone.go
@@ -1,4 +1,4 @@
-// Copyright (c) 2022 Tailscale Inc & AUTHORS All rights reserved.
+// Copyright (c) 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.
 
diff --git a/wgengine/wgcfg/wgcfg_clone.go b/wgengine/wgcfg/wgcfg_clone.go
index ed040cde4..b61697525 100644
--- a/wgengine/wgcfg/wgcfg_clone.go
+++ b/wgengine/wgcfg/wgcfg_clone.go
@@ -1,4 +1,4 @@
-// Copyright (c) 2022 Tailscale Inc & AUTHORS All rights reserved.
+// Copyright (c) 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.