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Build-Hopen-0.000002-TRIAL
River stage zero No dependents
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/ Build::Hopen

NAME

Build::Hopen - A build generator with first-class edges and explicit dependencies

SYNOPSIS

Input is the last-sorting file in . matching *.hopen, unless you specify otherwise. That way you can call your build file .hopen if you want it hidden, or z.hopen if you want it to sort below all your other files. Sort order is Lua's <, which is by byte value.

Output is a build file for a build system (Ninja or Make will be first). You will eventually be able to pick a generator, a la CMake. The invoker will put the selected generator's path first in @INC, but other than that it's all straight Perl.

INSTALLATION

Easiest: install cpanminus if you don't have it - see https://metacpan.org/pod/App::cpanminus#INSTALLATION. Then run cpanm Build::Hopen.

Manually: clone or untar into a working directory. Then, in that directory,

    perl Makefile.PL
    make
    make test

... and if all the tests pass,

    make install

If some of the tests fail, please check the issues and file a new one if no one else has reported the problem yet.

VARIABLES

$VERBOSE

Set to truthy to get debug output on stderr from hopen's internals.

FUNCTIONS

boolify

Convert a scalar to a Boolean as Perl, except:

  • Falsy

    /^(false|off|no)$/i

  • Truthy

    "0"

So false, off, no, empty string, undef, and numeric 0 are falsy, and all other values (including string '0') are truthy.

hnew

Creates a new Build::Hopen instance. For example:

    hnew DAG => 'foo';

is the same as

    Build::Hopen::G::DAG->new( name => 'foo' );

If the provided name does not include a double-colon, it is first tried after Build::Hopen::G::. It is then tried in Build::Hopen:: and as a complete package name. The first one that succeeds is used.

The first parameter must be a part of a class name, and the second parameter must be the name of the new instance. All other parameters are passed unchanged to the relevant constructor.

hlog

Log information if "$VERBOSE" is set. Usage:

    hlog { <list of things to log> };

The items in the list are joined by ' ' on output, and a '\n' is added. Each line is prefixed with '# ' for the benefit of test runs.

INTERNALS

 - C<Op>: A class representing an operation
   - C<Op:run()> takes a table of inputs and returns a table of outputs.
   - C<Op:describe()> returns a table listing those inputs and outputs.

Implementation

After the hopen file is processed, cycles are detected and reported as errors. *(TODO change this to support LaTeX multi-run files?)* Then the DAG is traversed, and each operation writes the necessary information to the file being generated.

SUPPORT

You can find documentation for this module with the perldoc command.

    perldoc Build::Hopen
    perldoc hopen

You can also look for information at:

INSPIRED BY

  • Luke

  • a bit of Ant

  • a tiny bit of Buck

  • my own frustrations working with CMake.

LICENSE AND COPYRIGHT

Copyright (C) 2018 Christopher White, <cxwembedded at gmail.com>

This program is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA