Add options to mixin file

[iammaxence]

I'm currently working with tikui on a project and I regularly have components that change depending on an element.

Example:

mixin test-button(options)
  -const opt = options || {}
  -const classList = [];
  -if (opt.isRed) classList.push('-red');
  -if (opt.isBlue) { classList.push('-blue') };
  -const classes = classList.length > 0 ? classList.join(' ') : null;
  button.test-button(disabled=opt.isDisabled, class=classes)

I would like to propose that we add to CLI the possibility to add options to mixin:

program
    .command('create <component> [destination]')
    .option('-p, --prefix <name>', 'prefix')
    .option('-mo, --mixin-options', 'add options parameter to mixin')
    .description('create a component.')
    .addHelpText('after', '\nExample:\n $ tikui create -p tikui component src/atom')
    .action((component, destination, options) => {
      createComponent(destination, component, options.prefix, options.mixinOptions);
      console.log(`Creating component ${component} to ${path.resolve(destination)}`); // eslint-disable-line no-console
    });

To get this result :

mixin test-component(options)
  -const opt = options || {};
  -const classList = [];
  -const classes = classList.length > 0 ? classList.join(' ') : null;
  .test-component(class=classes) test-component

The createMixin function will be like this:

const createMixin = (componentDirectory: string, component: string, prefix?: string, mixinOptions?: boolean): void => {
  let content = `mixin ${dashPrefix(prefix)}${component}\n  .${dashPrefix(prefix)}${component} ${component}\n`;
  if(mixinOptions){
    content = `mixin ${dashPrefix(prefix)}${component}(options)
    -const opt = options || {};
    -const classList = [];
    -const classes = classList.length > 0 ? classList.join(' ') : null;
    .${dashPrefix(prefix)}${component}(class=classes) ${component}\n`;

  }
  const file = `${component}.mixin.pug`;
  createFile(componentDirectory, file);
  fs.writeFileSync(path.resolve(componentDirectory, file), content);
};

What do you think ?

[Gnuk]

You can propose a PR for it, i'm not sure -mo will work because multiple characters options needs two dash.

I've no idea if it will be really useful for Tikui users but let's try.

I know there is also a lack of documentation.

(On your PR, don't forget to refactor when needed ;) )