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 { CoverageManagerImplementation } from "../coverage-manager.js";
import { getCoveragePath, setCoverageManager } from "../helpers.js";
export default async () => ({
    created: async (context, hre) => {
        if (context.globalOptions.coverage) {
            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);
                    return;
                },
            });
        }
    },
});
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