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gitea/options/license/Vim
2019-10-30 16:19:14 +00:00

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VIM LICENSE
I) There are no restrictions on distributing unmodified copies of Vim except
that they must include this license text. You can also distribute unmodified
parts of Vim , likewise unrestricted except that they must include this license
text. You are also allowed to include executables that you made from the unmodified
Vim sources, plus your own usage examples and Vim scripts.
II) It is allowed to distribute a modified (or extended) version of Vim ,
including executables and/or source code, when the following four conditions
are met:
1) This license text must be included unmodified.
2) The modified Vim must be distributed in one of the following five ways:
a) If you make changes to Vim yourself, you must clearly describe in the distribution
how to contact you. When the maintainer asks you (in any way) for a copy of
the modified Vim you distributed, you must make your changes, including source
code, available to the maintainer without fee. The maintainer reserves the
right to include your changes in the official version of Vim . What the maintainer
will do with your changes and under what license they will be distributed
is negotiable. If there has been no negotiation then this license, or a later
version, also applies to your changes. The current maintainer is Bram Moolenaar
<Bram@vim.org>. If this changes it will be announced in appropriate places
(most likely vim.sf.net, www.vim.org and/or comp.editors). When it is completely
impossible to contact the maintainer, the obligation to send him your changes
ceases. Once the maintainer has confirmed that he has received your changes
they will not have to be sent again.
b) If you have received a modified Vim that was distributed as mentioned under
a) you are allowed to further distribute it unmodified, as mentioned at I).
If you make additional changes the text under a) applies to those changes.
c) Provide all the changes, including source code, with every copy of the
modified Vim you distribute. This may be done in the form of a context diff.
You can choose what license to use for new code you add. The changes and their
license must not restrict others from making their own changes to the official
version of Vim .
d) When you have a modified Vim which includes changes as mentioned under
c), you can distribute it without the source code for the changes if the following
three conditions are met:
- The license that applies to the changes permits you to distribute the changes
to the Vim maintainer without fee or restriction, and permits the Vim maintainer
to include the changes in the official version of Vim without fee or restriction.
- You keep the changes for at least three years after last distributing the
corresponding modified Vim . When the maintainer or someone who you distributed
the modified Vim to asks you (in any way) for the changes within this period,
you must make them available to him.
- You clearly describe in the distribution how to contact you. This contact
information must remain valid for at least three years after last distributing
the corresponding modified Vim , or as long as possible.
e) When the GNU General Public License (GPL) applies to the changes, you can
distribute the modified Vim under the GNU GPL version 2 or any later version.
3) A message must be added, at least in the output of the ":version" command
and in the intro screen, such that the user of the modified Vim is able to
see that it was modified. When distributing as mentioned under 2)e) adding
the message is only required for as far as this does not conflict with the
license used for the changes.
4) The contact information as required under 2)a) and 2)d) must not be removed
or changed, except that the person himself can make corrections.
III) If you distribute a modified version of Vim , you are encouraged to use
the Vim license for your changes and make them available to the maintainer,
including the source code. The preferred way to do this is by e-mail or by
uploading the files to a server and e-mailing the URL. If the number of changes
is small (e.g., a modified Makefile) e-mailing a context diff will do. The
e-mail address to be used is <maintainer@vim.org>
IV) It is not allowed to remove this license from the distribution of the
Vim sources, parts of it or from a modified version. You may use this license
for previous Vim releases instead of the license that they came with, at your
option.