| Patrick Williams | b48b7b4 | 2016-08-17 15:04:38 -0500 | [diff] [blame] | 1 | VIM LICENSE |
| 2 | |
| 3 | I) There are no restrictions on distributing unmodified copies of Vim except |
| 4 | that they must include this license text. You can also distribute |
| 5 | unmodified parts of Vim, likewise unrestricted except that they must |
| 6 | include this license text. You are also allowed to include executables |
| 7 | that you made from the unmodified Vim sources, plus your own usage |
| 8 | examples and Vim scripts. |
| 9 | |
| 10 | II) It is allowed to distribute a modified (or extended) version of Vim, |
| 11 | including executables and/or source code, when the following four |
| 12 | conditions are met: |
| 13 | 1) This license text must be included unmodified. |
| 14 | 2) The modified Vim must be distributed in one of the following five ways: |
| 15 | a) If you make changes to Vim yourself, you must clearly describe in |
| 16 | the distribution how to contact you. When the maintainer asks you |
| 17 | (in any way) for a copy of the modified Vim you distributed, you |
| 18 | must make your changes, including source code, available to the |
| 19 | maintainer without fee. The maintainer reserves the right to |
| 20 | include your changes in the official version of Vim. What the |
| 21 | maintainer will do with your changes and under what license they |
| 22 | will be distributed is negotiable. If there has been no negotiation |
| 23 | then this license, or a later version, also applies to your changes. |
| 24 | The current maintainer is Bram Moolenaar <Bram@vim.org>. If this |
| 25 | changes it will be announced in appropriate places (most likely |
| 26 | vim.sf.net, www.vim.org and/or comp.editors). When it is completely |
| 27 | impossible to contact the maintainer, the obligation to send him |
| 28 | your changes ceases. Once the maintainer has confirmed that he has |
| 29 | received your changes they will not have to be sent again. |
| 30 | b) If you have received a modified Vim that was distributed as |
| 31 | mentioned under a) you are allowed to further distribute it |
| 32 | unmodified, as mentioned at I). If you make additional changes the |
| 33 | text under a) applies to those changes. |
| 34 | c) Provide all the changes, including source code, with every copy of |
| 35 | the modified Vim you distribute. This may be done in the form of a |
| 36 | context diff. You can choose what license to use for new code you |
| 37 | add. The changes and their license must not restrict others from |
| 38 | making their own changes to the official version of Vim. |
| 39 | d) When you have a modified Vim which includes changes as mentioned |
| 40 | under c), you can distribute it without the source code for the |
| 41 | changes if the following three conditions are met: |
| 42 | - The license that applies to the changes permits you to distribute |
| 43 | the changes to the Vim maintainer without fee or restriction, and |
| 44 | permits the Vim maintainer to include the changes in the official |
| 45 | version of Vim without fee or restriction. |
| 46 | - You keep the changes for at least three years after last |
| 47 | distributing the corresponding modified Vim. When the maintainer |
| 48 | or someone who you distributed the modified Vim to asks you (in |
| 49 | any way) for the changes within this period, you must make them |
| 50 | available to him. |
| 51 | - You clearly describe in the distribution how to contact you. This |
| 52 | contact information must remain valid for at least three years |
| 53 | after last distributing the corresponding modified Vim, or as long |
| 54 | as possible. |
| 55 | e) When the GNU General Public License (GPL) applies to the changes, |
| 56 | you can distribute the modified Vim under the GNU GPL version 2 or |
| 57 | any later version. |
| 58 | 3) A message must be added, at least in the output of the ":version" |
| 59 | command and in the intro screen, such that the user of the modified Vim |
| 60 | is able to see that it was modified. When distributing as mentioned |
| 61 | under 2)e) adding the message is only required for as far as this does |
| 62 | not conflict with the license used for the changes. |
| 63 | 4) The contact information as required under 2)a) and 2)d) must not be |
| 64 | removed or changed, except that the person himself can make |
| 65 | corrections. |
| 66 | |
| 67 | III) If you distribute a modified version of Vim, you are encouraged to use |
| 68 | the Vim license for your changes and make them available to the |
| 69 | maintainer, including the source code. The preferred way to do this is |
| 70 | by e-mail or by uploading the files to a server and e-mailing the URL. |
| 71 | If the number of changes is small (e.g., a modified Makefile) e-mailing a |
| 72 | context diff will do. The e-mail address to be used is |
| 73 | <maintainer@vim.org> |
| 74 | |
| 75 | IV) It is not allowed to remove this license from the distribution of the Vim |
| 76 | sources, parts of it or from a modified version. You may use this |
| 77 | license for previous Vim releases instead of the license that they came |
| 78 | with, at your option. |
| 79 | |
| 80 | === |
| 81 | Read more about this license at http://vimdoc.sourceforge.net/htmldoc/uganda.html#license |