Configurable Starters

[imhoffd]

Many framework CLIs have a single starter with feature flags to enable/disable/switch certain features and preferences such as TypeScript, testing frameworks, theme, etc. We've already seen requests for this, such as #3490, #4236

The starters in place for Ionic 4 beta are the typical Ionic-style starters, but can we make one starter where the contents and options are configurable? Can ionic start prompt for all these options?

Examples:

ionic start --nav-style=tabs
ionic start --no-karma
ionic start --theme=dark
ionic start --no-lazy-loading
ionic start --css

[rdlabo]

I think this(--no-karma, --theme=dark, --no-lazy-loading) is possible.
After git clone, CLI change templates is not difficult. For examle, this. 578ab61#diff-4a980f27a232e57ec064ec6e999db520R655

[imhoffd]

I'm not certain how scalable that is. If the starter's file structure changes even slightly, it could result in runtime errors and will be difficult to maintain.

Your PR for the -s flag could easily be a part of this new type of starter, however:

ionic start --no-karma --feature-structure=type

^ This would start a new app without karma and the old way of structuring features (pages, components, etc).

[rdlabo]

I'm glad for v3's folder structure can also be used in v4!
May I try to challenge implementation?

[imhoffd]

A note: the important conceptual change here is that the logic of how to structure a starter is shifted onto the starter template itself, and the Ionic CLI becomes just a way to ask for inputs and write files. This makes ionic start more bullet-proof and future-proof, on top of unlocking a bunch of features.

cc @johneast

[Sampath-Lokuge]

Hi, @dwieeb Will we have this feature soon on the Ionic 5 app? i.e. create CSS apps. Because of @adamdbradley instruct us to use CSS only apps. It is here: https://twitter.com/adamdbradley/status/1250790908833955840

[imhoffd]

Probably not soon, no. I wouldn't make decisions for your organization based on opinions on Twitter. Use what works best for you and your team. In the meantime, it isn't terribly difficult to change an Ionic Angular app to use CSS if that's what you want.