import { ContractSource } from '@0xproject/sol-resolver'; import { logUtils } from '@0xproject/utils'; import * as _ from 'lodash'; import * as path from 'path'; import { fsWrapper } from './fs_wrapper'; import { ContractArtifact } from './types'; /** * Gets contract data on network or returns if an artifact does not exist. * @param artifactsDir Path to the artifacts directory. * @param contractName Name of contract. * @return Contract data on network or undefined. */ export async function getContractArtifactIfExistsAsync( artifactsDir: string, contractName: string, ): Promise { let contractArtifact; const currentArtifactPath = `${artifactsDir}/${contractName}.json`; try { const opts = { encoding: 'utf8', }; const contractArtifactString = await fsWrapper.readFileAsync(currentArtifactPath, opts); contractArtifact = JSON.parse(contractArtifactString); return contractArtifact; } catch (err) { logUtils.log(`Artifact for ${contractName} does not exist`); return undefined; } } /** * Creates a directory if it does not already exist. * @param artifactsDir Path to the directory. */ export async function createDirIfDoesNotExistAsync(dirPath: string): Promise { if (!fsWrapper.doesPathExistSync(dirPath)) { logUtils.log(`Creating directory at ${dirPath}...`); await fsWrapper.mkdirpAsync(dirPath); } } /** * Searches Solidity source code for compiler version range. * @param source Source code of contract. * @return Solc compiler version range. */ export function parseSolidityVersionRange(source: string): string { const SOLIDITY_VERSION_RANGE_REGEX = /pragma\s+solidity\s+(.*);/; const solcVersionRangeMatch = source.match(SOLIDITY_VERSION_RANGE_REGEX); if (_.isNull(solcVersionRangeMatch)) { throw new Error('Could not find Solidity version range in source'); } const solcVersionRange = solcVersionRangeMatch[1]; return solcVersionRange; } /** * Normalizes the path found in the error message. * Example: converts 'base/Token.sol:6:46: Warning: Unused local variable' * to 'Token.sol:6:46: Warning: Unused local variable' * This is used to prevent logging the same error multiple times. * @param errMsg An error message from the compiled output. * @return The error message with directories truncated from the contract path. */ export function getNormalizedErrMsg(errMsg: string): string { const SOLIDITY_FILE_EXTENSION_REGEX = /(.*\.sol)/; const errPathMatch = errMsg.match(SOLIDITY_FILE_EXTENSION_REGEX); if (_.isNull(errPathMatch)) { throw new Error(`Could not find a path in error message: ${errMsg}`); } const errPath = errPathMatch[0]; const baseContract = path.basename(errPath); const normalizedErrMsg = errMsg.replace(errPath, baseContract); return normalizedErrMsg; } /** * Parses the contract source code and extracts the dendencies * @param source Contract source code * @return List of dependendencies */ export function parseDependencies(contractSource: ContractSource): string[] { // TODO: Use a proper parser const source = contractSource.source; const IMPORT_REGEX = /(import\s)/; const DEPENDENCY_PATH_REGEX = /"([^"]+)"/; // Source: https://github.com/BlockChainCompany/soljitsu/blob/master/lib/shared.js const dependencies: string[] = []; const lines = source.split('\n'); _.forEach(lines, line => { if (!_.isNull(line.match(IMPORT_REGEX))) { const dependencyMatch = line.match(DEPENDENCY_PATH_REGEX); if (!_.isNull(dependencyMatch)) { let dependencyPath = dependencyMatch[1]; if (dependencyPath.startsWith('.')) { dependencyPath = path.join(path.dirname(contractSource.path), dependencyPath); } dependencies.push(dependencyPath); } } }); return dependencies; }