hardhat/dist/src/internal/builtin-plugins/coverage/hook-handlers/hre.js

Hardhat is an extensible developer tool that helps smart contract developers increase productivity by reliably bringing together the tools they want.

import { getCoveragePath, setCoverageManager } from "../helpers/accessors.js";
let CoverageManagerImplementation;
export default async () => ({
    created: async (context, hre) => {
        if (!context.globalOptions.coverage) {
            return;
        }
        if (CoverageManagerImplementation === undefined) {
            ({ CoverageManagerImplementation } = await import("../coverage-manager.js"));
        }
        const coveragePath = getCoveragePath(hre.config.paths.root);
        const coverageManager = new CoverageManagerImplementation(coveragePath);
        setCoverageManager(hre, coverageManager);
        // NOTE: We register this hook dynamically because we use the information about
        // the existence of onCoverageData hook handlers to determine whether coverage
        // is enabled or not.
        hre.hooks.registerHandlers("network", {
            onCoverageData: async (_context, coverageData) => {
                await coverageManager.addData(coverageData);
            },
        });
    },
});
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