.. _license:

########
Licenses
########

DFHack is distributed under the Zlib license, with some MIT-
and BSD-licensed components.  These licenses protect your right
to use DFHack for any purpose, distribute copies, and so on.

The core, plugins, scripts, and other DFHack code all use the
ZLib license unless noted otherwise.  By contributing to DFHack,
authors release the contributed work under this license.

DFHack also draws on several external packages.
Their licenses are summarised here and reproduced below.

=============== ============= =================================================
Component       License       Copyright
=============== ============= =================================================
DFHack_         Zlib          \(c\) 2009-2012, Petr Mrázek
clsocket_       BSD 3-clause  \(c\) 2007-2009, CarrierLabs, LLC.
dirent_         MIT           \(c\) 2006, Toni Ronkko
JSON.lua_       CC-BY-SA_     \(c\) 2010-2014, Jeffrey Friedl
jsoncpp_        MIT           \(c\) 2007-2010, Baptiste Lepilleur
libexpat_       MIT           \(c\) 1998-2000 Thai Open Source Software Center Ltd and Clark Cooper \(c\) 2001-2019 Expat maintainers
libzip_         BSD 3-clause  \(c\) 1999-2020 Dieter Baron and Thomas Klausner
linenoise_      BSD 2-clause  \(c\) 2010, Salvatore Sanfilippo & Pieter Noordhuis
lua_            MIT           \(c\) 1994-2008, Lua.org, PUC-Rio.
luacov_         MIT           \(c\) 2007 - 2018 Hisham Muhammad
luafilesystem_  MIT           \(c\) 2003-2014, Kepler Project
lua-profiler_   MIT           \(c\) 2002,2003,2004 Pepperfish
protobuf_       BSD 3-clause  \(c\) 2008, Google Inc.
tinythread_     Zlib          \(c\) 2010, Marcus Geelnard
tinyxml_        Zlib          \(c\) 2000-2006, Lee Thomason
UTF-8-decoder_  MIT           \(c\) 2008-2010, Bjoern Hoehrmann
xlsxio_         MIT           \(c\) 2016-2020, Brecht Sanders
alt-getopt_     MIT           \(c\) 2009 Aleksey Cheusov
=============== ============= =================================================

.. _DFHack: https://github.com/DFHack/dfhack
.. _clsocket: https://github.com/DFHack/clsocket
.. _dirent: https://github.com/tronkko/dirent
.. _JSON.lua: http://regex.info/blog/lua/json
.. _jsoncpp: https://github.com/open-source-parsers/jsoncpp
.. _libexpat: https://github.com/libexpat/libexpat
.. _libzip: https://github.com/nih-at/libzip
.. _linenoise: http://github.com/antirez/linenoise
.. _lua: http://www.lua.org
.. _luacov: https://github.com/keplerproject/luacov
.. _luafilesystem: https://github.com/keplerproject/luafilesystem
.. _lua-profiler: http://lua-users.org/wiki/PepperfishProfiler
.. _protobuf: https://github.com/google/protobuf
.. _tinythread: http://tinythreadpp.bitsnbites.eu/
.. _tinyxml: http://www.sourceforge.net/projects/tinyxml
.. _UTF-8-decoder: http://bjoern.hoehrmann.de/utf-8/decoder/dfa
.. _xlsxio: https://github.com/brechtsanders/xlsxio
.. _alt-getopt: https://github.com/LuaDist/alt-getopt

.. _CC-BY-SA: http://creativecommons.org/licenses/by/3.0/deed.en_US


Zlib License
============
See https://en.wikipedia.org/wiki/Zlib_License
::

    This software is provided 'as-is', without any express or implied
    warranty. In no event will the authors be held liable for any
    damages arising from the use of this software.

    Permission is granted to anyone to use this software for any
    purpose, including commercial applications, and to alter it and
    redistribute it freely, subject to the following restrictions:

    1. The origin of this software must not be misrepresented; you must
       not claim that you wrote the original software. If you use this
       software in a product, an acknowledgment in the product
       documentation would be appreciated but is not required.

    2. Altered source versions must be plainly marked as such, and
       must not be misrepresented as being the original software.

    3. This notice may not be removed or altered from any source
       distribution.

MIT License
===========
See https://en.wikipedia.org/wiki/MIT_License
::

    Permission is hereby granted, free of charge, to any person obtaining
    a copy of this software and associated documentation files (the
    "Software"), to deal in the Software without restriction, including
    without limitation the rights to use, copy, modify, merge, publish,
    distribute, sublicense, and/or sell copies of the Software, and to
    permit persons to whom the Software is furnished to do so, subject to
    the following conditions:

    The above copyright notice and this permission notice shall be included
    in all copies or substantial portions of the Software.

    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
    OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
    IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
    CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
    TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
    SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

BSD Licenses
============
See https://en.wikipedia.org/wiki/BSD_licenses
::

    Redistribution and use in source and binary forms, with or without
    modification, are permitted provided that the following conditions are
    met:

     1. Redistributions of source code must retain the above copyright
        notice, this list of conditions and the following disclaimer.

     2. Redistributions in binary form must reproduce the above copyright
        notice, this list of conditions and the following disclaimer in
        the documentation and/or other materials provided with the
        distribution.

    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
    "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
    LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
    A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
    HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
    SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
    LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
    DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
    THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
    (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
    OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

``linenoise`` adds no further clauses.

``protobuf`` adds the following clause::

    3. Neither the name of Google Inc. nor the names of its
       contributors may be used to endorse or promote products derived
       from this software without specific prior written permission.

``clsocket`` adds the following clauses::

    3. The name of the author may not be used to endorse or promote
       products derived from this software without specific prior
       written permission.

    4. The name "CarrierLabs" must not be used to endorse or promote
       products derived from this software without prior written
       permission. For written permission, please contact
       mark@carrierlabs.com
