chore: change licence to MIT

Sponsored-by: author

1 files changed, 29 insertions, 41 deletions

diff --git a/license.mdwn b/license.mdwn
index a69a660..c97b26a 100644
--- a/license.mdwn
+++ b/license.mdwn
@@ -1,41 +1,29 @@
-[[!meta title="Licenses"]]
-
-[four freedoms]: https://www.gnu.org/philosophy/free-sw.html
-[GNU General Public Licence, version 3 or later]: https://www.gnu.org/licenses/gpl-3.0.html
-[Apache 2.0]: https://www.apache.org/licenses/LICENSE-2.0
-[CC-BY-SA 4.0 (International)]: https://creativecommons.org/licenses/by-sa/4.0/
-
-We have chosen software licenses for this project following these
-principles:
-
-* Subplot itself is free software, meaning it provides all the [four
-  freedoms][] as defined by the Free Software Foundation: use (for
-  whatever purpose), study and change, share, share modified versions.
-
-* Subplot should have little effect on the licensing of the outputs.
-
-While we would prefer it if everyone only produced free software, we
-don't want to mandate it, and thus we've chosen to use a mix of
-permissive and copyleft licenses for different parts of the project.
-
-As long as you only run Subplot, you don't need to care about the
-licences, and you can use the outputs as you wish.
-
-* The Subplot tooling (document and test program generators) are
-  licensed under the [GNU General Public Licence, version 3 or
-  later][].
-
-* The documents and test programs generated by Subplot have whatever
-  licence the input documents have. Subplot has no effect on their
-  licences.
-
-* Subplot uses templates, libraries, and scaffolding to produce the
-  test programs. These are licensed under the [Apache 2.0][] licence,
-  but with the extra permission that when they're used to generate
-  outputs by Subplot, they don't affect the licence of the generated
-  test programs. The programs generated by Subplot have the license of
-  the inputs.
-
-* The Subplot documentation, inluding examples, are licensed under the
-  [CC-BY-SA 4.0 (International)][] licence. This is better suited for
-  documentation than the code licences above.
+[[!meta title="Licences"]]
+
+Subplot itself is licensed under the MIT-0 licence. The [Subplot
+logo](/subplot.svg) is under the Creative Commons CC-BY-SA 4.0 licence
+(<https://creativecommons.org/licenses/by-sa/4.0/>).
+
+Copyright 2019-2021  Lars Wirzenius, Daniel Silverstone
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+“Software”), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+Fork this project to create your own MIT license that you can always
+link to.