treewide: Add nice GPL-3.0-or-later license header

This change also ensures that this repo is reuse-3.0 compliant.

7 files changed, 62 insertions, 1 deletions

diff --git a/flake.lock.license b/flake.lock.license
new file mode 100644
index 00000000..eae6a84c
--- /dev/null
+++ b/flake.lock.license
@@ -0,0 +1,9 @@
+nixos-config - My current NixOS configuration
+
+Copyright (C) 2025 Benedikt Peetz <benedikt.peetz@b-peetz.de>
+SPDX-License-Identifier: GPL-3.0-or-later
+
+This file is part of my nixos-config.
+
+You should have received a copy of the License along with this program.
+If not, see <https://www.gnu.org/licenses/gpl-3.0.txt>.
diff --git a/flake.nix b/flake.nix
index 220095aa..dd60b8dd 100644
--- a/flake.nix
+++ b/flake.nix
@@ -1,6 +1,13 @@
-# Copyright (C) 2024 Benedikt Peetz <benedikt.peetz@b-peetz.de>
+# nixos-config - My current NixOS configuration
 #
+# Copyright (C) 2024 Benedikt Peetz <benedikt.peetz@b-peetz.de>
+# Copyright (C) 2025 Benedikt Peetz <benedikt.peetz@b-peetz.de>
 # SPDX-License-Identifier: GPL-3.0-or-later
+#
+# This file is part of my nixos-config.
+#
+# You should have received a copy of the License along with this program.
+# If not, see <https://www.gnu.org/licenses/gpl-3.0.txt>.
 {
   description = "A NixOS System Configuration";
 
diff --git a/flake/apps/default.nix b/flake/apps/default.nix
index f1709c71..b9f4c255 100644
--- a/flake/apps/default.nix
+++ b/flake/apps/default.nix
@@ -1,3 +1,12 @@
+# nixos-config - My current NixOS configuration
+#
+# Copyright (C) 2025 Benedikt Peetz <benedikt.peetz@b-peetz.de>
+# SPDX-License-Identifier: GPL-3.0-or-later
+#
+# This file is part of my nixos-config.
+#
+# You should have received a copy of the License along with this program.
+# If not, see <https://www.gnu.org/licenses/gpl-3.0.txt>.
 {
   self,
   system,
diff --git a/flake/default.nix b/flake/default.nix
index ae17ad39..9ddae40d 100644
--- a/flake/default.nix
+++ b/flake/default.nix
@@ -1,3 +1,12 @@
+# nixos-config - My current NixOS configuration
+#
+# Copyright (C) 2025 Benedikt Peetz <benedikt.peetz@b-peetz.de>
+# SPDX-License-Identifier: GPL-3.0-or-later
+#
+# This file is part of my nixos-config.
+#
+# You should have received a copy of the License along with this program.
+# If not, see <https://www.gnu.org/licenses/gpl-3.0.txt>.
 {
   # core
   self,
diff --git a/flake/nixosConfigurations/default.nix b/flake/nixosConfigurations/default.nix
index 1831cd1b..c4fa2f40 100644
--- a/flake/nixosConfigurations/default.nix
+++ b/flake/nixosConfigurations/default.nix
@@ -1,3 +1,12 @@
+# nixos-config - My current NixOS configuration
+#
+# Copyright (C) 2025 Benedikt Peetz <benedikt.peetz@b-peetz.de>
+# SPDX-License-Identifier: GPL-3.0-or-later
+#
+# This file is part of my nixos-config.
+#
+# You should have received a copy of the License along with this program.
+# If not, see <https://www.gnu.org/licenses/gpl-3.0.txt>.
 {
   self,
   system,
diff --git a/flake/packages/default.nix b/flake/packages/default.nix
index 95aa539a..7ea1b6cc 100644
--- a/flake/packages/default.nix
+++ b/flake/packages/default.nix
@@ -1,3 +1,12 @@
+# nixos-config - My current NixOS configuration
+#
+# Copyright (C) 2025 Benedikt Peetz <benedikt.peetz@b-peetz.de>
+# SPDX-License-Identifier: GPL-3.0-or-later
+#
+# This file is part of my nixos-config.
+#
+# You should have received a copy of the License along with this program.
+# If not, see <https://www.gnu.org/licenses/gpl-3.0.txt>.
 {
   self,
   nixos-generators,
diff --git a/flake/treefmt.nix b/flake/treefmt.nix
index e2c6aeae..703a85e8 100644
--- a/flake/treefmt.nix
+++ b/flake/treefmt.nix
@@ -1,3 +1,12 @@
+# nixos-config - My current NixOS configuration
+#
+# Copyright (C) 2025 Benedikt Peetz <benedikt.peetz@b-peetz.de>
+# SPDX-License-Identifier: GPL-3.0-or-later
+#
+# This file is part of my nixos-config.
+#
+# You should have received a copy of the License along with this program.
+# If not, see <https://www.gnu.org/licenses/gpl-3.0.txt>.
 {
   treefmt-nix,
   pkgs,