vis

a vi-like editor based on Plan 9's structural regular expressions
LICENSE

(1887B)
      1 vis as a whole is licensed under the following standard ISC license:
      2 
      3  Copyright © 2014-2020 Marc André Tanner, et al.
      4 
      5  Permission to use, copy, modify, and/or distribute this software for any
      6  purpose with or without fee is hereby granted, provided that the above
      7  copyright notice and this permission notice appear in all copies.
      8 
      9  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
     10  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
     11  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
     12  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
     13  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
     14  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
     15  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
     16 
     17 Portions of this software are derived from third-party works licensed
     18 under terms compatible with the above ISC license:
     19 
     20  - ./configure is based on the corresponding script from the musl libc
     21    project and is MIT licensed
     22 
     23  - map.[ch] originate from the Comprehensive C Archive Network strmap
     24    module and are public domain / CC0 licensed
     25 
     26  - libutf.[ch] originate from libutf a port of Plan 9's Unicode library
     27    to Unix and are MIT licensed
     28 
     29  - sam.[ch] is heavily inspired (and partially based upon) the X11
     30    version of Rob Pike's sam text editor originally written for Plan 9
     31    and distributed under an ISC-like license
     32 
     33  - lua/lexers/* the LPeg based lexers used for syntax highlighting are
     34    imported from the Scintillua project licensed under the MIT license
     35 
     36 Check the individual source files for more specific copyright information.
     37 
     38 Details on authorship of individual files can be found in the git version
     39 control history of the project. The omission of copyright and license
     40 comments in each file is in the interest of source tree size.