Apply specific addon instead of the whole template

[andyduong1920]

Currently, the template doesn't support to apply only specific addon yet, someone might use the template to add a few add-ons instead of the whole template.

For example:

mix nimble.phx.gen.template addon=credo # applying only credo addon to an existing project
mix nimble.phx.gen.template addon=wallaby # applying only wallaby addon to an existing project

[andyduong1920]

As the existing project's structure might differ from the original project, so it will be challenging to apply the addon to that. We can implement this one by 2 phrases

• Phrase 1: Instead of applying the addon, we can render the step-by-step how to integrate the addon like a guide so the user can add it manually regardless of their existing structure.

  eg: with the Oban addon

  • Step 1: add Oban into the mix.ex file
  • Step 2: Create the migration file with the following content ....
  • Step 3: ....

• Phrase 2: Apply to any existing structure, this would be a hard task.