Generalize SPDX header

AUTHORS.md

@@ -0,0 +1,58 @@
+<!--
+  - SPDX-FileCopyrightText: 2026 Nextcloud GmbH and Nextcloud contributors
+  - SPDX-License-Identifier: GPL-3.0-or-later
+-->
+# Authors
+
+* Abhishek Tiwari <abhitiwari472@gmail.com>
+* Adam Serbinski <adam@serbinski.com>
+* Allan Nordhøy <epost@anotheragency.no>
+* Álvaro Brey <alvaro.brey@nextcloud.com>
+* Amanda Rosene <arosene83@gmail.com>
+* Andy Scherzinger <info@andy-scherzinger.de>
+* Edvard Holst <edvard.holst@gmail.com>
+* Bhavesh Kumawat <kumawatbhavesh1000@gmail.com>
+* Biswajit Das <biswajitbangalore@gmail.com>
+* Christian Reiner <foss@christian-reiner.info>
+* Daniel Bailey <daniel.bailey@grappleIT.co.uk>
+* Daniel Calviño Sánchez <danxuliu@gmail.com>
+* Dariusz Olszewski <starypatyk@users.noreply.github.com>
+* David Leibovych <ariedov@gmail.com>
+* Dominik Schürmann <dominik@schuermann.eu>
+* eho <edvard.holst@gmail.com>
+* Enrique López Mañas <eenriquelopez@gmail.com>
+* Ezhil Shanmugham <ezhil930@gmail.com>
+* fariba khandani <khandani@winworker.de>
+* Florian Ludwig <florian.ludwig@uninow.de>
+* gavine99 <github@xymail.tk>
+* Giacomo Pacini <giacomopacini98@gmail.com>
+* Grigorii K. Shartsev <me@shgk.me>
+* hidrohase <github@honesz.net>
+* Jan-Christoph Borchardt <hey@jancborchardt.net>
+* jld3103 <jld3103yt@gmail.com>
+* Joas Schilling <coding@schilljs.com>
+* John Molakvoæ <skjnldsv@protonmail.com>
+* Jos Poortvliet <jos@opensuse.org>
+* Josh <josh.t.richards@gmail.com>
+* Julius Linus <julius.linus@nextcloud.com>
+* Marcel Hibbe <dev@mhibbe.de>
+* Mario Danic <mario@lovelyhq.com>
+* MichaIng <28480705+MichaIng@users.noreply.github.com>
+* Morris Jobke <hey@morrisjobke.de>
+* o0lwj0o <373911550@qq.com>
+* Parneet Singh <gurayaparneet@gmail.com>
+* Poussinou <francoisvincentmail-game@yahoo.fr>
+* rakekniven <mark.ziegler@rakekniven.de>
+* rapterjet2004 <juliuslinus1@gmail.com>
+* sim <git@sgougeon.fr>
+* Smarshal21 <samanwith21@gmail.com>
+* sokai <sokai@users.noreply.github.com>
+* Sowjanya Kota <sowjanya.kch@gmail.com>
+* Stefan Niedermann <info@niedermann.it>
+* Stephan Ritscher <no3pam@gmail.com>
+* Tarek Loubani <tarek@tarek.org>
+* Tilo Spannagel <development@tilosp.de>
+* Tim Krüger <t@timkrueger.me>
+* Tobias Kaminsky <tobias@kaminsky.me>
+* Valdnet <47037905+Valdnet@users.noreply.github.com>
+* Viktor Balogh <viktor.balogh45@gmail.com>

CONTRIBUTING.md

@@ -120,11 +120,11 @@ There are three build variants
 ### Apply a license
 
 Nextcloud doesn't require a CLA (Contributor License Agreement).
-The copyright belongs to all the individual contributors.
-Therefore we recommend that every contributor adds following line to the header of a file, if they changed it substantially:
+The copyright belongs to all the individual contributors. 
+Therefore we recommend that every contributor adds the following line to the [AUTHORS.md](AUTHORS.md) file if they made substantial changes to the code:
 
 ```
-Copyright (c) <year> <your name> <your email address>
+- <your name> <your email address>
 ```
 
 See section [Adding new files](#adding-new-files) for templates which can be used in new files.
@@ -189,53 +189,25 @@ If automatic backport fails, it will create a comment.
 ### Adding new files
 
 If you create a new file it needs to contain a license header. We encourage you to use the same license (GPL3+) as we do.
-Copyright of Nextcloud GmbH is optional.
+Copyright of Nextcloud GmbH is optional. Individual contributor names shall go into [AUTHORS.md](AUTHORS.md) so headers are kept brief.
 
 Source code of app:
 ```java/kotlin
 /*
- * Nextcloud Talk application
+ * Nextcloud Talk - Android Client
  *
- * @author Your Name
- * Copyright (C) 2021 Your Name
- * Copyright (C) 2021 Nextcloud GmbH
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU 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 General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ * SPDX-FileCopyrightText: 2026 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: GPL-3.0-or-later
  */
  ```
 
- XML (layout) file:
+ XML file:
  ```xml
 <!--
-  Nextcloud Talk application
-
-  @author Your Name
-  Copyright (C) 2021 Your Name
-  Copyright (C) 2021 Nextcloud GmbH
-
-  This program is free software: you can redistribute it and/or modify
-  it under the terms of the GNU 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 General Public License for more details.
-
-  You should have received a copy of the GNU General Public License
-  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+  ~ Nextcloud Talk - Android Client
+  ~
+  ~ SPDX-FileCopyrightText: 2026 Nextcloud GmbH and Nextcloud contributors
+  ~ SPDX-License-Identifier: GPL-3.0-or-later
 -->
 ```