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<?xml version='1.0'?>
<!DOCTYPE sconsdoc [
<!ENTITY % scons SYSTEM "../scons.mod">
%scons;
]>
<chapter id="chap-background"
xmlns="http://www.scons.org/dbxsd/v1.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.scons.org/dbxsd/v1.0/scons.xsd scons.xsd">
<title>Background</title>
<!--
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Permission is hereby granted, free of charge, to any person obtaining
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"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.
-->
<para>
Most of the ideas in &SCons; originate with &Cons;, a Perl-based
software construction utility that has been in use by a small but
growing community since its development by Bob Sidebotham at FORE
Systems in 1996. The &Cons; copyright was transferred in 2000 from
Marconi (who purchased FORE Systems) to the Free Software Foundation.
I've been a principal implementer and maintainer of &Cons; for several
years.
</para>
<para>
&Cons; was originally designed to handle complicated software build
problems (multiple directories, variant builds) while keeping the
input files simple and maintainable. The general philosophy is that
the build tool should ``do the right thing'' with minimal input
from an unsophisticated user, while still providing a rich set of
underlying functionality for more complicated software construction
tasks needed by experts.
</para>
<para>
In 2000, the Software Carpentry sought entries in a contest for a
new, Python-based build tool that would provide an improvement
over Make for physical scientists and other non-programmers
struggling to use their computers more effectively. Prior to that,
the idea of combining the superior build architecture of &Cons;
with the easier syntax of Python had come up several times on
the <literal>cons-discuss</literal> mailing list. The Software
Carpentry contest provided the right motivation to spend some
actual time working on a design document.
</para>
<para>
After two rounds of competition, the submitted design, named
<application>ScCons</application>, won the competition. Software
Carpentry, however, did not immediately fund implementation of the
build tool, instead contracting for additional, more detailed draft(s)
of the design document. This proved to be not as strong motivation as
actual coding, and after several months of inactivity, I essentially
resigned from the Software Carpentry effort in early 2001 to start
working on the tool independently.
</para>
<para>
After half a year of prototyping some of the important infrastructure,
I accumulated enough code to take the project public at SourceForge,
renaming it &SCons; to distinguish it slightly from the version of the
design that won the Software Carpentry contest while still honoring
its roots there and in the original &Cons; utility. And also because
it would be a teensy bit easier to type.
</para>
</chapter>
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