LICENSE (5148B)
1 VIM LICENSE 2 3 I) There are no restrictions on distributing unmodified copies of [project] 4 except that they must include this license text. You can also distribute 5 unmodified parts of [project], 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 [project] sources, plus your own usage 8 examples and Vim scripts. 9 10 II) It is allowed to distribute a modified (or extended) version of [project], 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 [project] must be distributed in one of the following five 15 ways: 16 a) If you make changes to [project] yourself, you must clearly describe 17 in the distribution how to contact you. When the maintainer asks 18 you (in any way) for a copy of the modified [project] you 19 distributed, you must make your changes, including source code, 20 available to the maintainer without fee. The maintainer reserves 21 the right to include your changes in the official version of 22 [project]. What the maintainer will do with your changes and under 23 what license they will be distributed is negotiable. If there has 24 been no negotiation then this license, or a later version, also 25 applies to your changes. The current maintainer is Bram Moolenaar 26 <Bram@vim.org>. If this changes it will be announced in appropriate 27 places (most likely vim.sf.net, www.vim.org and/or comp.editors). 28 When it is completely impossible to contact the maintainer, the 29 obligation to send him your changes ceases. Once the maintainer has 30 confirmed that he has received your changes they will not have to be 31 sent again. 32 b) If you have received a modified [project] that was distributed as 33 mentioned under a) you are allowed to further distribute it 34 unmodified, as mentioned at I). If you make additional changes the 35 text under a) applies to those changes. 36 c) Provide all the changes, including source code, with every copy of 37 the modified [project] you distribute. This may be done in the form 38 of a context diff. You can choose what license to use for new code 39 you add. The changes and their license must not restrict others 40 from making their own changes to the official version of [project]. 41 d) When you have a modified [project] which includes changes as 42 mentioned under c), you can distribute it without the source code 43 for the changes if the following three conditions are met: 44 - The license that applies to the changes permits you to distribute 45 the changes to the Vim maintainer without fee or restriction, and 46 permits the Vim maintainer to include the changes in the official 47 version of [project] without fee or restriction. 48 - You keep the changes for at least three years after last 49 distributing the corresponding modified [project]. When the 50 maintainer or someone who you distributed the modified [project] 51 to asks you (in any way) for the changes within this period, you 52 must make them available to him. 53 - You clearly describe in the distribution how to contact you. This 54 contact information must remain valid for at least three years 55 after last distributing the corresponding modified [project], or 56 as long as possible. 57 e) When the GNU General Public License (GPL) applies to the changes, 58 you can distribute the modified [project] under the GNU GPL version 59 2 or any later version. 60 3) A message must be added, at least in the output of the ":version" 61 command and in the intro screen, such that the user of the modified 62 [project] is able to see that it was modified. When distributing as 63 mentioned under 2)e) adding the message is only required for as far as 64 this does not conflict with the license used for the changes. 65 4) The contact information as required under 2)a) and 2)d) must not be 66 removed or changed, except that the person himself can make 67 corrections. 68 69 III) If you distribute a modified version of [project], you are encouraged to 70 use the Vim license for your changes and make them available to the 71 maintainer, including the source code. The preferred way to do this is 72 by e-mail or by uploading the files to a server and e-mailing the URL. If 73 the number of changes is small (e.g., a modified Makefile) e-mailing a 74 context diff will do. The e-mail address to be used is 75 <maintainer@vim.org> 76 77 IV) It is not allowed to remove this license from the distribution of the 78 [project] sources, parts of it or from a modified version. You may use 79 this license for previous [project] releases instead of the license that 80 they came with, at your option. 81 82 83