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