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