@slippy-lint/slippy/dist/rules/max-state-vars.js

A simple but powerful linter for Solidity

import { NonterminalKind, TerminalKind } from "@nomicfoundation/slang/cst";
import * as z from "zod";
const DEFAULT_MAX_STATE_VARIABLES = 15;
const ConfigSchema = z
    .optional(z.number())
    .default(DEFAULT_MAX_STATE_VARIABLES);
export const MaxStateVars = {
    name: "max-state-vars",
    recommended: true,
    parseConfig: (config) => {
        return ConfigSchema.parse(config);
    },
    create: function (config) {
        return new MaxStateVarsRule(this.name, config);
    },
};
class MaxStateVarsRule {
    constructor(name, config) {
        this.name = name;
        this.config = config;
    }
    run({ file }) {
        const diagnostics = [];
        const cursor = file.createTreeCursor();
        while (cursor.goToNextNonterminalWithKind(NonterminalKind.ContractDefinition)) {
            const contractCursor = cursor.spawn();
            if (!contractCursor.goToNextTerminalWithKind(TerminalKind.Identifier)) {
                continue;
            }
            const contractName = contractCursor.node.unparse();
            const contractRange = contractCursor.textRange;
            let count = 0;
            while (contractCursor.goToNextNonterminalWithKind(NonterminalKind.StateVariableDefinition)) {
                count++;
            }
            if (count > this.config) {
                diagnostics.push({
                    sourceId: file.id,
                    rule: this.name,
                    message: `Contract '${contractName}' has more than ${this.config} state variables`,
                    line: contractRange.start.line,
                    column: contractRange.start.column,
                });
            }
        }
        return diagnostics;
    }
}
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