root/trunk/examples/util/config/MultipleSources.d

/*******************************************************************************

    License:    Boost Software License, v. 1.0
                Academic Free License, v. 3.0
                BSD License

    Authors:    Marcin Kuszczak, www.zapytajmnie.com (author's christian site)
                This software is inspired and partially based on Boost C++
                library named 'program_options' and created by Vladimir Prus.

    Version:    0.9.1
    Date:       30-Apr-2008

    History:    0.9.0 (08-Oct-2007) -   initial public version

    Description:
                Shows how to use both command line and config file.

 ******************************************************************************/

import std.stdio;
import std.file;

import doost.util.config.ProgramOptions;
import doost.util.config.CommandLineStorage;
import doost.util.config.ConfigFileStorage;

//------------------------------------------------------------------------------

/*******************************************************************************
    Program entry point
 ******************************************************************************/
void main(char[][] args) {
    try {
        // Declare a group of options that will be
        // allowed only on command line
        auto generic = new RegularOptions("Generic options");
        generic.options()
            ("version,v", "print version string")
            ("help,h", "produce help message")
        ;

        auto cmdline = new CommandLineOptions();
        cmdline.options()
            ("selfdir", new SelfDir)
            ("selfname", new SelfName)
        ;

        // Declare a group of options that will be
        // allowed both on command line and in
        // config file
        auto config = new RegularOptions("Configuration");
        config.options()
            ("optimization", define!(int)().defaultValue(10), "optimization level")
            ("include-path,I", define!(char[][])().composing(), "include path")
        ;

        // Hidden options, will be allowed both on command line and
        // in config file, but will not be shown to the user.
        auto hidden=new RegularOptions("Hidden options");
        hidden.options()
            ("input-file", define!(char[][]), "input file")
        ;

        auto cmdline_options = new RegularOptions;
        cmdline_options.options()
                            (generic)
                            (config)
                            (hidden)
        ;

        auto config_file_options = new RegularOptions;
        config_file_options.add(config).add(hidden);

        auto visible = new RegularOptions("Allowed options");
        visible.add(generic).add(config);

        auto p = new CommandLineOptions;
        p.options()
            ("input-file=*", new PositionalOption)
        ;

        auto po =   (new ProgramOptions)
                        .next(
                    (new CommandLineStorage(args))
                        .options(cmdline_options, cmdline)
                        .next(
                    (new ConfigFileStorage("MultipleSources.cfg"))
                        .options(config_file_options)
                    ));

        po.connect;

        if ("help" in po) {
            writefln(visible);
            return 0;
        }

        if ("version" in po) {
            writefln("Multiple sources example, version 1.0");
            return 0;
        }

        if ("include-path" in po) {
            writefln("Include paths are: ", po["include-path"]);
        }

        if ("input-file" in po) {
            writefln("Input files are: ", po["input-file"]);
        }

        writefln("Optimization level is ", po["optimization"]);
        writefln("Selfdir is ", po["selfdir"]);
        writefln("Selfname is ", po["selfname"]);

        po.disconnect;

    } catch (ProgramOptionsException e) {
        writefln(e.toString);
        return 1;
    }
}