[cordova-create] Simplify interface of main export (§1)

[raphinesse]

Current situation

Arguments

/**
 * Usage:
 * @dir - directory where the project will be created. Required.
 * @optionalId - app id. Required (but be "undefined")
 * @optionalName - app name. Required (but can be "undefined").
 * @cfg - extra config to be saved in .cordova/config.json Required (but can be "{}").
 * @extEvents - An EventEmitter instance that will be used for logging purposes. Required (but can be "undefined").
 **/
// Returns a promise.
function (dir, optionalId, optionalName, cfg, extEvents) {...}

Properties of cfg used in cordovaCreate¹

{
    lib: {
        www: {
            // The path/url/npm-name to the template that should be used
            url: String,

            // Symlink instead of copy files from template to dir
            link: Boolean,

            // Template is only fetched when true.
            // Template files are only copied when true.
            // If false, only some "mandatory" files are copied over from
            // `cordova-app-hello-world`
            template: Boolean,

            // Deprecated alias for url (w/out deprecation warning)
            uri: String
        }
    }
}

¹: neither the cfg object nor parts larger than single leaf properties are
passed outside the scope of this module, so a local view on this is all we need.

Pain Points

• Required but optional™ arguments
• Deeply nested structure of configuration
• Confusing naming and unclear semantics of configuration

Proposal

Arguments

/**
 * Creates a new cordova project in dest.
 *
 * @param {string} dest - directory where the project will be created.
 * @param {Object} [opts={}] - options to be used for creating a new cordova project.
 * @returns {Promise} Promise that resolves when project creation has finished
 */
function (dest, opts) {...}

Structure of opts

{
    // Attributes to be set in package.json & config.xml
    id: String,
    name: String,
    version: String,

    // The path/url/npm-name to the template that should be used
    template: String,

    // Symlink instead of copy files from template to dest
    link: Boolean,

    // An EventEmitter instance that will be used for logging purposes
    // If not dropped as proposed in §4
    extEvents: EventEmitter
}

---

Migrated from #89

[brodybits]

I do not see if the public cordovaCreate function API, which seems to be exported by both cordova-create and cordova-lib, was documented anywhere other than in a README. From NPM I see very few direct dependents of cordova-create, more dependents of cordova-lib including some gulp plugins (which seem to be a bit old).

I think it would be good to get the Cordova tooling API documented. Should this be raised as a separate task?

If we change the public cordovaCreate function API on cordova-create I would favor allowing the caller to inject the fetch function for smoother mocking. (No need for cordova-lib to export this option, I think.)

[raphinesse]

Thanks for your feedback @brodybits !

I think it would be good to get the Cordova tooling API documented. Should this be raised as a separate task?

Yes, the tooling libs definitely need better documentation. Prefereable in their respective README.
I already added that point to our release planning document, so I think we are fine for now.

If we change the public cordovaCreate function API on cordova-create I would favor allowing the caller to inject the fetch function for smoother mocking. (No need for cordova-lib to export this option, I think.)

I'm not too fond of polluting the public interface for testing only. Jasmine spies and rewire work pretty well for me, given the test subject has a reasonable structure.

If we need DI for real-world use cases, I'm open to it. I would probably move it to a separate issue though, as it is an additional feature.

[raphinesse]

This issue was moved to apache/cordova-create#21