Report duplicate blocks

[bartveneman]

A feature in SonarQube is to report duplicate selectors. It would be interesting to take this one step further and report when complete blocks are duplicated.

.my-class {
  color: red;
  background: white;
}

/*  ... lots of code ... */

.my-class {
  color: red;
  background: white;
}

/* Open for discussion */
.my-class,
.my-second-class { /* <-- Extra class, but the initial class and rule block are identical */
  color: red;
  background: white;
}

/* Same ruleset, but within a @media at-rule */
@media (min-width: 400px) {
  .my-class {
    color: red;
    background: white;
  }
}