[chore] Improve copyright header handling (#1608)

* [chore] Remove years from all license headers

Years or year ranges aren't required in license headers. Many projects
have removed them in recent years and it avoids a bit of yearly toil.

In many cases our copyright claim was also a bit dodgy since we added
the 2021-2023 header to files created after 2021 but you can't claim
copyright into the past that way.

* [chore] Add license header check

This ensures a license header is always added to any new file. This
avoids maintainers/reviewers needing to remember to check for and ask
for it in case a contribution doesn't include it.

* [chore] Add missing license headers

* [chore] Further updates to license header

* Use the more common // indentend comment format
* Remove the hack we had for the linter now that we use the // format
* Add SPDX license identifier

1 files changed, 26 insertions, 27 deletions

diff --git a/internal/typeutils/internaltoas_test.go b/internal/typeutils/internaltoas_test.go
index f3cee648c..9c858947e 100644
--- a/internal/typeutils/internaltoas_test.go
+++ b/internal/typeutils/internaltoas_test.go
@@ -1,20 +1,19 @@
-/*
-   GoToSocial
-   Copyright (C) 2021-2023 GoToSocial Authors admin@gotosocial.org
-
-   This program is free software: you can redistribute it and/or modify
-   it under the terms of the GNU Affero General Public License as published by
-   the Free Software Foundation, either version 3 of the License, or
-   (at your option) any later version.
-
-   This program is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-   GNU Affero General Public License for more details.
-
-   You should have received a copy of the GNU Affero General Public License
-   along with this program.  If not, see <http://www.gnu.org/licenses/>.
-*/
+// GoToSocial
+// Copyright (C) GoToSocial Authors admin@gotosocial.org
+// SPDX-License-Identifier: AGPL-3.0-or-later
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 package typeutils_test
 
@@ -460,18 +459,18 @@ func (suite *InternalToASTestSuite) TestStatusToASDeletePublicReplyOriginalDelet
 	testStatus := suite.testStatuses["admin_account_status_3"]
 	ctx := context.Background()
 
-  // Delete the status this replies to.
-  if err := suite.db.DeleteStatusByID(ctx, testStatus.ID); err != nil {
-    suite.FailNow(err.Error())
-  }
+	// Delete the status this replies to.
+	if err := suite.db.DeleteStatusByID(ctx, testStatus.ID); err != nil {
+		suite.FailNow(err.Error())
+	}
 
-  // Delete the mention the reply created.
-  mention := suite.testMentions["admin_account_mention_zork"]
-  if err := suite.db.DeleteByID(ctx, mention.ID, mention); err != nil {
-    suite.FailNow(err.Error())
-  }
+	// Delete the mention the reply created.
+	mention := suite.testMentions["admin_account_mention_zork"]
+	if err := suite.db.DeleteByID(ctx, mention.ID, mention); err != nil {
+		suite.FailNow(err.Error())
+	}
 
-  // The delete should still be created OK.
+	// The delete should still be created OK.
 	asDelete, err := suite.typeconverter.StatusToASDelete(ctx, testStatus)
 	suite.NoError(err)