problem description

Currently, the zkThemeTemplate https://github.com/zkoss/zkThemeTemplate project only contains the default theme. If users want to create a customized theme based on another theme e.g. sapphire, they have to copy another theme's source files from another repository.

We should provide an easy way for users to create a customized theme based on any of built-in themes. Since rare users create a theme from nothing, they usually choose a theme whose style is closest to what they want and just modify several settings in a theme e.g. main color, font size, border...

Requirement

The provided approach should fulfill the following requirements:
1. works for all standard themes and compact themes
2. can track/merge change with git
3. reduce manual actions to minimal steps e.g. a setup script

proposed solution

For example, we can put

• each theme in a different folder
• one theme for one branch
  in zkThemeTemplate repo.

• import different LESS file for different theme

• run a script to override all necessary files instead of copying files manually for compact theme