Domore.Conf 10.4.0

Domore.Conf

Configure .NET objects from readable key = value text or conf files. Domore.Conf populates existing objects, supports nested properties and indexed collections, and can serialize objects back to conf text.

Install the package with dotnet add package Domore.Conf.

Configure an object

using System;
using Domore.Conf.Extensions;

var settings = new AppSettings().ConfFrom(@"
AppSettings.Host = example.com
AppSettings.Port = 8080
");

Console.WriteLine(settings.Host); // example.com
Console.WriteLine(settings.Port); // 8080

var text = settings.ConfText();

public sealed class AppSettings {
    public string Host { get; set; } = "localhost";
    public int Port { get; set; } = 80;
}

By default, keys begin with the target type's name (AppSettings in this example). Pass key: "" to ConfFrom to use unprefixed keys instead:

var settings = new AppSettings().ConfFrom("Port = 8080", key: "");

Keys and property names are matched without regard to case. Values are converted using the invariant culture. Properties not mentioned in the text retain their existing values; an empty value such as Port = or Host = does not overwrite a property.

Read a file

Use Conf.Contain to load a file path (or conf text) into a container:

using Domore.Conf;

var settings = Conf.Contain("settings.conf").Configure(new AppSettings());

Alternatively, set Conf.Source and call Conf.Configure for the shared static container. When no source is set, Domore.Conf looks for a .conf file next to the entry application and can copy a .conf.default file into place if one exists.

To combine files, add an include directive:

@conf.include = defaults.conf
AppSettings.Port = 8080

Relative includes resolve from the containing file's directory. Later settings override earlier included settings. The default directive prefix is @conf; set Conf.Special or pass a different prefix to Conf.Contain(source, special) to change it.

Nested values and collections

For types with corresponding public properties, separate nested properties with dots and use brackets for list or dictionary entries:

AppSettings.Database.Host = db.example.com
AppSettings.Servers[0] = primary
AppSettings.Labels[region] = west

For a comma-separated value that replaces a list, annotate the property with [ConfListItems] from Domore.Conf.Converters:

using System.Collections.Generic;
using Domore.Conf;
using Domore.Conf.Converters;

public sealed class AppSettings {
    [ConfListItems]
    public List<string> Servers { get; set; } = new List<string>();
}

AppSettings.Servers = primary, secondary

Use [Conf("alias")] to accept another name for a property, or [Conf(ignore: true)] to exclude it from both population and serialization.

Watch a file

ConfFile can populate an object once and optionally watch the file for changes:

using Domore.Conf;

using var file = new ConfFile("settings.conf", key: null, target: settings);
file.Configure(watch: true);

The default watch delay is 1,000 ms; set file.Delay to change it. Subscribe to Configured, ConfigureError, or WatchError to handle watch events. Dispose the ConfFile when it is no longer needed.