all: add SPDX license tag

tools/build_debian.sh

@@ -2,6 +2,8 @@
 #
 # SPDX-FileCopyrightText: 2015-2025 Sébastien Helleu <flashcode@flashtux.org>
 #
+# SPDX-License-Identifier: GPL-3.0-or-later
+#
 # This file is part of WeeChat, the extensible chat client.
 #
 # WeeChat is free software; you can redistribute it and/or modify

tools/build_test.sh

@@ -2,6 +2,8 @@
 #
 # SPDX-FileCopyrightText: 2014-2025 Sébastien Helleu <flashcode@flashtux.org>
 #
+# SPDX-License-Identifier: GPL-3.0-or-later
+#
 # This file is part of WeeChat, the extensible chat client.
 #
 # WeeChat is free software; you can redistribute it and/or modify

tools/bump_version.sh

@@ -2,6 +2,8 @@
 #
 # SPDX-FileCopyrightText: 2023-2025 Sébastien Helleu <flashcode@flashtux.org>
 #
+# SPDX-License-Identifier: GPL-3.0-or-later
+#
 # This file is part of WeeChat, the extensible chat client.
 #
 # WeeChat is free software; you can redistribute it and/or modify

tools/check_curl_symbols.py

@@ -2,6 +2,8 @@
 #
 # SPDX-FileCopyrightText: 2023-2025 Sébastien Helleu <flashcode@flashtux.org>
 #
+# SPDX-License-Identifier: GPL-3.0-or-later
+#
 # 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

tools/check_scripts.sh

@@ -2,6 +2,8 @@
 #
 # SPDX-FileCopyrightText: 2023-2025 Sébastien Helleu <flashcode@flashtux.org>
 #
+# SPDX-License-Identifier: GPL-3.0-or-later
+#
 # This file is part of WeeChat, the extensible chat client.
 #
 # WeeChat is free software; you can redistribute it and/or modify

tools/generate_python_stub.py

@@ -3,6 +3,8 @@
 # SPDX-FileCopyrightText: 2019 Simmo Saan <simmo.saan@gmail.com>
 # SPDX-FileCopyrightText: 2021-2025 Sébastien Helleu <flashcode@flashtux.org>
 #
+# SPDX-License-Identifier: GPL-3.0-or-later
+#
 # 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
@@ -33,12 +35,14 @@ SRC_DIR = Path(__file__).resolve().parent.parent / "src"
 
 STUB_HEADER = """\
 #
+# SPDX-FileCopyrightText: 2019-2025 Sébastien Helleu <flashcode@flashtux.org>
+#
+# SPDX-License-Identifier: GPL-3.0-or-later
+#
 # WeeChat Python stub file, auto-generated by generate_python_stub.py.
 # DO NOT EDIT BY HAND!
 #
 
-# SPDX-FileCopyrightText: 2019-2025 Sébastien Helleu <flashcode@flashtux.org>
-
 from typing import Dict, Union
 """
 

tools/makedist.sh

@@ -2,6 +2,8 @@
 #
 # SPDX-FileCopyrightText: 2003-2025 Sébastien Helleu <flashcode@flashtux.org>
 #
+# SPDX-License-Identifier: GPL-3.0-or-later
+#
 # This file is part of WeeChat, the extensible chat client.
 #
 # WeeChat is free software; you can redistribute it and/or modify

tools/release.sh

@@ -2,6 +2,8 @@
 #
 # SPDX-FileCopyrightText: 2023-2025 Sébastien Helleu <flashcode@flashtux.org>
 #
+# SPDX-License-Identifier: GPL-3.0-or-later
+#
 # This file is part of WeeChat, the extensible chat client.
 #
 # WeeChat is free software; you can redistribute it and/or modify

tools/set_git_version.sh

@@ -2,6 +2,8 @@
 #
 # SPDX-FileCopyrightText: 2003-2025 Sébastien Helleu <flashcode@flashtux.org>
 #
+# SPDX-License-Identifier: GPL-3.0-or-later
+#
 # This file is part of WeeChat, the extensible chat client.
 #
 # WeeChat is free software; you can redistribute it and/or modify

tools/test_relay_api.sh

@@ -2,6 +2,8 @@
 #
 # SPDX-FileCopyrightText: 2024-2025 Sébastien Helleu <flashcode@flashtux.org>
 #
+# SPDX-License-Identifier: GPL-3.0-or-later
+#
 # This file is part of WeeChat, the extensible chat client.
 #
 # WeeChat is free software; you can redistribute it and/or modify