Rule idea: dollar-variable-pattern

Following my question on SO (http://stackoverflow.com/questions/36304921) I’m proposing to add a rule to enforce a naming convention for variable names in SCSS.

Something like https://github.com/sasstools/sass-lint/pull/257 would be great I reckon, where we could either specify a string for a preferred common format (camelcase, snakecase etc…) or a custom pattern.

For example I may want my variable names to always be camel case, in which case:

// this wouldn't be correct
$my-variable: #000;

// but this would be correct
$myVariable: #000;

I don’t have experience in writing plugins for stylelint but I may give it a try based on the other rules in this repo and try to work something out in a PR if it’s of any use to anybody else.

[Arcanorum]

I think the docs for this need updating. No mention of how to use this. https://github.com/kristerkari/stylelint-scss/blob/master/src/rules/dollar-variable-pattern/README.md

[Arkkimaagi]

@Arcanorum if you or someone else have not solved this already, I had luck by adding this to my .stylelintrc.yaml in the rules part:

scss/dollar-variable-pattern: "^-?[a-z][a-z0-9]*(--?[a-z0-9]+)*$"

I wanted to allow a bit more bem-like formatting in our dollar variables like: $-details-tag--large

I agree that the documentation could be better.