Comply with REUSE 3.3

11 files changed, 148 insertions, 106 deletions

diff --git a/COPYING b/LICENSES/AGPL-3.0-or-later.txt
index 0ad25db..0ad25db 100644
--- a/COPYING
+++ b/LICENSES/AGPL-3.0-or-later.txt
diff --git a/LICENSES/CC0-1.0.txt b/LICENSES/CC0-1.0.txt
new file mode 100644
index 0000000..0e259d4
--- /dev/null
+++ b/LICENSES/CC0-1.0.txt
@@ -0,0 +1,121 @@
+Creative Commons Legal Code
+
+CC0 1.0 Universal
+
+    CREATIVE COMMONS CORPORATION IS NOT A LAW FIRM AND DOES NOT PROVIDE
+    LEGAL SERVICES. DISTRIBUTION OF THIS DOCUMENT DOES NOT CREATE AN
+    ATTORNEY-CLIENT RELATIONSHIP. CREATIVE COMMONS PROVIDES THIS
+    INFORMATION ON AN "AS-IS" BASIS. CREATIVE COMMONS MAKES NO WARRANTIES
+    REGARDING THE USE OF THIS DOCUMENT OR THE INFORMATION OR WORKS
+    PROVIDED HEREUNDER, AND DISCLAIMS LIABILITY FOR DAMAGES RESULTING FROM
+    THE USE OF THIS DOCUMENT OR THE INFORMATION OR WORKS PROVIDED
+    HEREUNDER.
+
+Statement of Purpose
+
+The laws of most jurisdictions throughout the world automatically confer
+exclusive Copyright and Related Rights (defined below) upon the creator
+and subsequent owner(s) (each and all, an "owner") of an original work of
+authorship and/or a database (each, a "Work").
+
+Certain owners wish to permanently relinquish those rights to a Work for
+the purpose of contributing to a commons of creative, cultural and
+scientific works ("Commons") that the public can reliably and without fear
+of later claims of infringement build upon, modify, incorporate in other
+works, reuse and redistribute as freely as possible in any form whatsoever
+and for any purposes, including without limitation commercial purposes.
+These owners may contribute to the Commons to promote the ideal of a free
+culture and the further production of creative, cultural and scientific
+works, or to gain reputation or greater distribution for their Work in
+part through the use and efforts of others.
+
+For these and/or other purposes and motivations, and without any
+expectation of additional consideration or compensation, the person
+associating CC0 with a Work (the "Affirmer"), to the extent that he or she
+is an owner of Copyright and Related Rights in the Work, voluntarily
+elects to apply CC0 to the Work and publicly distribute the Work under its
+terms, with knowledge of his or her Copyright and Related Rights in the
+Work and the meaning and intended legal effect of CC0 on those rights.
+
+1. Copyright and Related Rights. A Work made available under CC0 may be
+protected by copyright and related or neighboring rights ("Copyright and
+Related Rights"). Copyright and Related Rights include, but are not
+limited to, the following:
+
+  i. the right to reproduce, adapt, distribute, perform, display,
+     communicate, and translate a Work;
+ ii. moral rights retained by the original author(s) and/or performer(s);
+iii. publicity and privacy rights pertaining to a person's image or
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+ iv. rights protecting against unfair competition in regards to a Work,
+     subject to the limitations in paragraph 4(a), below;
+  v. rights protecting the extraction, dissemination, use and reuse of data
+     in a Work;
+ vi. database rights (such as those arising under Directive 96/9/EC of the
+     European Parliament and of the Council of 11 March 1996 on the legal
+     protection of databases, and under any national implementation
+     thereof, including any amended or successor version of such
+     directive); and
+vii. other similar, equivalent or corresponding rights throughout the
+     world based on applicable law or treaty, and any national
+     implementations thereof.
+
+2. Waiver. To the greatest extent permitted by, but not in contravention
+of, applicable law, Affirmer hereby overtly, fully, permanently,
+irrevocably and unconditionally waives, abandons, and surrenders all of
+Affirmer's Copyright and Related Rights and associated claims and causes
+of action, whether now known or unknown (including existing as well as
+future claims and causes of action), in the Work (i) in all territories
+worldwide, (ii) for the maximum duration provided by applicable law or
+treaty (including future time extensions), (iii) in any current or future
+medium and for any number of copies, and (iv) for any purpose whatsoever,
+including without limitation commercial, advertising or promotional
+purposes (the "Waiver"). Affirmer makes the Waiver for the benefit of each
+member of the public at large and to the detriment of Affirmer's heirs and
+successors, fully intending that such Waiver shall not be subject to
+revocation, rescission, cancellation, termination, or any other legal or
+equitable action to disrupt the quiet enjoyment of the Work by the public
+as contemplated by Affirmer's express Statement of Purpose.
+
+3. Public License Fallback. Should any part of the Waiver for any reason
+be judged legally invalid or ineffective under applicable law, then the
+Waiver shall be preserved to the maximum extent permitted taking into
+account Affirmer's express Statement of Purpose. In addition, to the
+extent the Waiver is so judged Affirmer hereby grants to each affected
+person a royalty-free, non transferable, non sublicensable, non exclusive,
+irrevocable and unconditional license to exercise Affirmer's Copyright and
+Related Rights in the Work (i) in all territories worldwide, (ii) for the
+maximum duration provided by applicable law or treaty (including future
+time extensions), (iii) in any current or future medium and for any number
+of copies, and (iv) for any purpose whatsoever, including without
+limitation commercial, advertising or promotional purposes (the
+"License"). The License shall be deemed effective as of the date CC0 was
+applied by Affirmer to the Work. Should any part of the License for any
+reason be judged legally invalid or ineffective under applicable law, such
+partial invalidity or ineffectiveness shall not invalidate the remainder
+of the License, and in such case Affirmer hereby affirms that he or she
+will not (i) exercise any of his or her remaining Copyright and Related
+Rights in the Work or (ii) assert any associated claims and causes of
+action with respect to the Work, in either case contrary to Affirmer's
+express Statement of Purpose.
+
+4. Limitations and Disclaimers.
+
+ a. No trademark or patent rights held by Affirmer are waived, abandoned,
+    surrendered, licensed or otherwise affected by this document.
+ b. Affirmer offers the Work as-is and makes no representations or
+    warranties of any kind concerning the Work, express, implied,
+    statutory or otherwise, including without limitation warranties of
+    title, merchantability, fitness for a particular purpose, non
+    infringement, or the absence of latent or other defects, accuracy, or
+    the present or absence of errors, whether or not discoverable, all to
+    the greatest extent permissible under applicable law.
+ c. Affirmer disclaims responsibility for clearing rights of other persons
+    that may apply to the Work or any use thereof, including without
+    limitation any person's Copyright and Related Rights in the Work.
+    Further, Affirmer disclaims responsibility for obtaining any necessary
+    consents, permissions or other rights required for any use of the
+    Work.
+ d. Affirmer understands and acknowledges that Creative Commons is not a
+    party to this document and has no duty or obligation with respect to
+    this CC0 or use of the Work.
diff --git a/README.md b/README.md
index ef8376b..9c6fa29 100644
--- a/README.md
+++ b/README.md
@@ -60,11 +60,13 @@ on any Python package, it is safe to be tested in-tree:
 Issues should be reported to [chung@loa.loang.net][loang mailing list].
 
 The mailing list also welcomes patches.  Please maintain
-a full branch [coverage] and keep the [hobgoblins][flake8] happy:
+a full branch [coverage], keep the [hobgoblins][flake8] happy,
+and ensure the software is easy to [reuse]:
 
     PYTHONPATH=src coverage run
     coverage report
     flake8
+    reuse lint
 
 Patches should be sent using [`git send-email`][git send-email]
 with the following configuration:
@@ -87,5 +89,6 @@ version 3 or later.
 [loang mailing list]: https://loa.loang.net/chung
 [coverage]: https://coverage.rtfd.io
 [flake8]: https://flake8.pycqa.org
+[reuse]: https://reuse.software
 [git send-email]: https://git-send-email.io
 [agpl]: https://www.gnu.org/licenses/agpl
diff --git a/REUSE.toml b/REUSE.toml
new file mode 100644
index 0000000..9113eab
--- /dev/null
+++ b/REUSE.toml
@@ -0,0 +1,9 @@
+version = 1
+
+[[annotations]]
+path = [ '.gitignore',
+         'README.md',
+         'doc/*.h2m',
+         'pyproject.toml' ]
+SPDX-FileCopyrightText = 'None'
+SPDX-License-Identifier = 'CC0-1.0'
diff --git a/doc/Makefile b/doc/Makefile
index ed6b571..882198c 100644
--- a/doc/Makefile
+++ b/doc/Makefile
@@ -1,20 +1,7 @@
 # Makefile for manual pages
-# Copyright (C) 2025  Nguyễn Gia Phong
 #
-# This file is part of scadere.
-#
-# Scadere 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.
-#
-# Scadere 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 scadere.  If not, see <https://www.gnu.org/licenses/>.
+# SPDX-FileCopyrightText: 2025 Nguyễn Gia Phong
+# SPDX-License-Identifier: AGPL-3.0-or-later
 
 .POSIX:
 .PHONY: all clean install uninstall
diff --git a/src/scadere/__init__.py b/src/scadere/__init__.py
index bd67de9..e815276 100644
--- a/src/scadere/__init__.py
+++ b/src/scadere/__init__.py
@@ -1,20 +1,7 @@
 # Root package, with some helpers
-# Copyright (C) 2025  Nguyễn Gia Phong
 #
-# This file is part of scadere.
-#
-# Scadere 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.
-#
-# Scadere 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 scadere.  If not, see <https://www.gnu.org/licenses/>.
+# SPDX-FileCopyrightText: 2025 Nguyễn Gia Phong
+# SPDX-License-Identifier: AGPL-3.0-or-later
 
 from argparse import HelpFormatter, ONE_OR_MORE
 
diff --git a/src/scadere/check.py b/src/scadere/check.py
index bc5d3f5..a14543d 100644
--- a/src/scadere/check.py
+++ b/src/scadere/check.py
@@ -1,20 +1,7 @@
 # TLS certificate expiration checker
-# Copyright (C) 2025  Nguyễn Gia Phong
 #
-# This file is part of scadere.
-#
-# Scadere 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.
-#
-# Scadere 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 scadere.  If not, see <https://www.gnu.org/licenses/>.
+# SPDX-FileCopyrightText: 2025 Nguyễn Gia Phong
+# SPDX-License-Identifier: AGPL-3.0-or-later
 
 from argparse import ArgumentParser, FileType
 from base64 import urlsafe_b64encode as base64
diff --git a/src/scadere/listen.py b/src/scadere/listen.py
index 824a566..05fa199 100644
--- a/src/scadere/listen.py
+++ b/src/scadere/listen.py
@@ -1,20 +1,7 @@
 # HTTP server for Atom feed of TLS certificate expirations
-# Copyright (C) 2025  Nguyễn Gia Phong
 #
-# This file is part of scadere.
-#
-# Scadere 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.
-#
-# Scadere 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 scadere.  If not, see <https://www.gnu.org/licenses/>.
+# SPDX-FileCopyrightText: 2025 Nguyễn Gia Phong
+# SPDX-License-Identifier: AGPL-3.0-or-later
 
 from argparse import ArgumentParser
 from asyncio import run, start_server
diff --git a/tst/test_check.py b/tst/test_check.py
index 4b2c955..b07259f 100644
--- a/tst/test_check.py
+++ b/tst/test_check.py
@@ -1,20 +1,7 @@
 # Tests for the TLS client
-# Copyright (C) 2025  Nguyễn Gia Phong
 #
-# This file is part of scadere.
-#
-# Scadere 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.
-#
-# Scadere 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 scadere.  If not, see <https://www.gnu.org/licenses/>.
+# SPDX-FileCopyrightText: 2025 Nguyễn Gia Phong
+# SPDX-License-Identifier: AGPL-3.0-or-later
 
 from asyncio import get_running_loop, start_server
 from datetime import datetime, timedelta, timezone
diff --git a/tst/test_help.py b/tst/test_help.py
index 630fff1..544e731 100644
--- a/tst/test_help.py
+++ b/tst/test_help.py
@@ -1,20 +1,7 @@
 # Tests for CLI help formatting
-# Copyright (C) 2025  Nguyễn Gia Phong
 #
-# This file is part of scadere.
-#
-# Scadere 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.
-#
-# Scadere 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 scadere.  If not, see <https://www.gnu.org/licenses/>.
+# SPDX-FileCopyrightText: 2025 Nguyễn Gia Phong
+# SPDX-License-Identifier: AGPL-3.0-or-later
 
 from contextlib import redirect_stdout, suppress
 from io import StringIO
diff --git a/tst/test_listen.py b/tst/test_listen.py
index cf47ab7..bab9072 100644
--- a/tst/test_listen.py
+++ b/tst/test_listen.py
@@ -1,20 +1,7 @@
 # Tests for the HTTP server
-# Copyright (C) 2025  Nguyễn Gia Phong
 #
-# This file is part of scadere.
-#
-# Scadere 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.
-#
-# Scadere 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 scadere.  If not, see <https://www.gnu.org/licenses/>.
+# SPDX-FileCopyrightText: 2025 Nguyễn Gia Phong
+# SPDX-License-Identifier: AGPL-3.0-or-later
 
 from asyncio import open_unix_connection, start_unix_server
 from contextlib import asynccontextmanager, contextmanager