steerage

Plugin for configuring and composing Hapi (version >= 17.0.0 < 18.0.0) servers through a configuration file or manifest.

Supports environment-aware configuration and more using determination.

Usage

const Path = require('path');
const Steerage = require('steerage');

Steerage.init({ config: Path.join(__dirname, 'config', 'config.json') }).then((server) => {
    server.start();
});

API

• init(options) - a promise that returns a configured hapi server.

Configuration options

• config - a fully resolved path to a configuration document (relative paths in this document are from the document's location).
• basedir - optional alternative location to base shortstop relative paths from.
• onconfig(store) - hook for modifying config prior to creating list of plugins to register — may be async function or promise.
• protocols - optional additional custom shortstop protocols.
• environment - optional additional criteria for confidence property resolution and defaults to { env: process.env }.

Example onconfig hook

onconfig might be used to merge one configuration into another.

const Path = require('path');
const Steerage = require('steerage');
const Determination = require('determination');

const overrideResolve = Determination.create({ config: Path.join(__dirname, 'config', 'overrides.json') });

const onconfig = async function (configStore) {
    const overrides = await overrideResolve.resolve();

    configStore.use(overrides);

    return configStore;
};

Steerage.init({ config: Path.join(__dirname, 'config', 'config.json'), onconfig }).then((server) => {
    server.start();
});

Default supported configuration protocols

• file - read a file.
• path - resolve a path.
• base64 - resolve a base64 string.
• env - access an environment variable.
• require - require a javascript or json file.
• exec - execute a function.
• glob - match files using the patterns shell uses.
• config - access another property in the config.
• import - imports another JSON file, supports comments.

See determination.

Manifest

The resulting configuration (please see determination) should contain the (minimum) following:

• server - optional server settings overrides.
• register - an object defining plugins, with optional additional properties:
  • plugin - Hapi 17 plugin object.
  • enabled - can be set to false to disable registering this plugin (defaults to true).
  • before - a string or array of strings of plugin names (keys in the plugins object) used to reorder.
  • after - a string or array of strings of plugin names used to reorder.

Example:

{
    "server": {
        "app": {
            "name": "testApp"
        },
        "debug": {
            "log": {
                "$filter": "env.NODE_ENV",
                "$default": ["debug"],
                "production": ["warn"]
            }
        }
    },
    "register": {
        "good": {
            "plugin": "require:good",
            "options": {
                "reporters": {
                    "console": [{
                        "module": "good-console"
                    }, "stdout"]
                }
            }
        }
    }
}

In addition, the configuration will be accessible as server.app.config. This config object allows access to deep properties:

server.app.config.get('my.app.property');
server.app.config.set('my.app.property', true);

The resolved (for the environment at start time) JSON configuration can be viewed as server.settings.app.