eslint-plugin-sonarjs
Version:
SonarJS rules for ESLint
34 lines (33 loc) • 1.16 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.mergeRules = mergeRules;
/**
* Merges the listeners of an arbitrary number of ESLint-based rules
*
* The purpose of this helper function is to merge the behaviour of a
* variable number of rules. An ESLint rule "listens to" node visits based
* on a node selector. If the node selector matches, the listener then
* invokes a callback to proceed further with the node being visited.
*
* It supports when multiple rules share the same listeners, e.g., 2 rules
* listen to `CallExpression` node visits. They will be run one after the other.
*
* @param rules rules to merge
* @returns the merge of the rules' listeners
*/
function mergeRules(...rules) {
const merged = Object.assign({}, ...rules);
for (const listener of Object.keys(merged)) {
merged[listener] = mergeListeners(...rules.map(rule => rule[listener]));
}
return merged;
}
function mergeListeners(...listeners) {
return (...args) => {
for (const listener of listeners) {
if (listener) {
listener(...args);
}
}
};
}