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Merge pull request #45067 from nextcloud/docs/noid/SPDX-Header-How-To

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## Apply a license to a new file ## Apply a license to a new file


If you create a new file please use a license header
If you create a new file please use a SPDX license header.
The year should then be the creation time and the email address is optional.


#### Frontend source (`.js`, `.ts`, `.css` and etc) #### Frontend source (`.js`, `.ts`, `.css` and etc)


```js ```js
/** /**
* @copyright Copyright (c) <year>, <your name> (<your email address>)
*
* @license 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/>.
*
* SPDX-FileCopyrightText: [year] [your name] [<your email address>]
* SPDX-License-Identifier: AGPL-3.0-or-later
*/ */
```` ````




```html ```html
<!-- <!--
- @copyright Copyright (c) <year>, <your name> (<your email address>)
-
- @license 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/>.
- SPDX-FileCopyrightText: [year] [your name] [<your email address>]
- SPDX-License-Identifier: AGPL-3.0-or-later
--> -->
``` ```




```php ```php
/** /**
* @copyright Copyright (c) <year>, <your name> (<your email address>)
*
* @license GNU AGPL version 3 or any later version
*
* 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/>.
*
* SPDX-FileCopyrightText: [year] [your name] [<your email address>]
* SPDX-License-Identifier: AGPL-3.0-or-later
*/ */
``` ```


## Apply a licence to an existing file ## Apply a licence to an existing file


If you modify an existing file, please keep the existing license header as If you modify an existing file, please keep the existing license header as
it is and just add your copyright notice, for example:
it is and just add your copyright notice.
In order to do so there are two options:

* If a generic header is already present, please just add yourself to the AUTHORS.md file
* If no generic header is present, you can add yourself with a copyright line as described below


````diff ````diff
/** /**
* @copyright Copyright (c) 2022, Alice (alice@nextcloud.local)
* @copyright Copyright (c) 2023, Bob (bob@nextcloud.local)
+* @copyright Copyright (c) <year>, <your name> (<your email address>)
*
* @license GNU AGPL version 3 or any later version
*
* 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/>.
*
* SPDX-FileCopyrightText: 2022 Alice <alice@nextcloud.local>
* SPDX-FileCopyrightText: 2023 Bob <bob@nextcloud.local>
+* SPDX-FileCopyrightText: [year] [your name] [<your email address>]
* SPDX-License-Identifier: AGPL-3.0-or-later
*/ */
```` ````


An example of a generic license header where adding yourself to the AUTHORS.md
file is prefered please see the example below

```
/**
* SPDX-FileCopyrightText: 2024 Nextcloud GmbH and Nextcloud contributors
* SPDX-License-Identifier: AGPL-3.0-or-later
*/

```

For more information on SPDX headers, please see

* https://reuse.software/
* https://spdx.dev/

## DCO ## DCO


Additionally we require a Developer Certificate of Origin (DCO), look Additionally we require a Developer Certificate of Origin (DCO), look

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