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import { promisify } from '@0x/utils';
import { stripHexPrefix } from 'ethereumjs-util';
import * as fs from 'fs';
import { Collector } from 'istanbul';
import * as _ from 'lodash';
import { getLogger, levels, Logger } from 'loglevel';
import * as mkdirp from 'mkdirp';
import { AbstractArtifactAdapter } from './artifact_adapters/abstract_artifact_adapter';
import { constants } from './constants';
import { parseSourceMap } from './source_maps';
import {
ContractData,
Coverage,
SourceRange,
Subtrace,
TraceInfo,
TraceInfoExistingContract,
TraceInfoNewContract,
} from './types';
import { utils } from './utils';
const mkdirpAsync = promisify<undefined>(mkdirp);
export type SingleFileSubtraceHandler = (
contractData: ContractData,
subtrace: Subtrace,
pcToSourceRange: { [programCounter: number]: SourceRange },
fileIndex: number,
) => Coverage;
/**
* TraceCollector is used by CoverageSubprovider to compute code coverage based on collected trace data.
*/
export class TraceCollector {
private readonly _artifactAdapter: AbstractArtifactAdapter;
private readonly _logger: Logger;
private _contractsData!: ContractData[];
private readonly _collector = new Collector();
private readonly _singleFileSubtraceHandler: SingleFileSubtraceHandler;
/**
* Instantiates a TraceCollector instance
* @param artifactAdapter Adapter for used artifacts format (0x, truffle, giveth, etc.)
* @param isVerbose If true, we will log any unknown transactions. Otherwise we will ignore them
* @param singleFileSubtraceHandler A handler function for computing partial coverage for a single file & subtrace
*/
constructor(
artifactAdapter: AbstractArtifactAdapter,
isVerbose: boolean,
singleFileSubtraceHandler: SingleFileSubtraceHandler,
) {
this._artifactAdapter = artifactAdapter;
this._logger = getLogger('sol-cov');
this._logger.setLevel(isVerbose ? levels.TRACE : levels.ERROR);
this._singleFileSubtraceHandler = singleFileSubtraceHandler;
}
public async writeOutputAsync(): Promise<void> {
const finalCoverage = this._collector.getFinalCoverage();
const stringifiedCoverage = JSON.stringify(finalCoverage, null, '\t');
await mkdirpAsync('coverage');
fs.writeFileSync('coverage/coverage.json', stringifiedCoverage);
}
public async computeSingleTraceCoverageAsync(traceInfo: TraceInfo): Promise<void> {
if (_.isUndefined(this._contractsData)) {
this._contractsData = await this._artifactAdapter.collectContractsDataAsync();
}
const isContractCreation = traceInfo.address === constants.NEW_CONTRACT;
const bytecode = isContractCreation
? (traceInfo as TraceInfoNewContract).bytecode
: (traceInfo as TraceInfoExistingContract).runtimeBytecode;
const contractData = utils.getContractDataIfExists(this._contractsData, bytecode);
if (_.isUndefined(contractData)) {
const errMsg = isContractCreation
? `Unknown contract creation transaction`
: `Transaction to an unknown address: ${traceInfo.address}`;
this._logger.warn(errMsg);
return;
}
const bytecodeHex = stripHexPrefix(bytecode);
const sourceMap = isContractCreation ? contractData.sourceMap : contractData.sourceMapRuntime;
const pcToSourceRange = parseSourceMap(contractData.sourceCodes, sourceMap, bytecodeHex, contractData.sources);
for (let fileIndex = 0; fileIndex < contractData.sources.length; fileIndex++) {
const singleFileCoverageForTrace = this._singleFileSubtraceHandler(
contractData,
traceInfo.subtrace,
pcToSourceRange,
fileIndex,
);
this._collector.add(singleFileCoverageForTrace);
}
}
}
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