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-rw-r--r--packages/sol-compiler/src/utils/compiler.ts107
1 files changed, 107 insertions, 0 deletions
diff --git a/packages/sol-compiler/src/utils/compiler.ts b/packages/sol-compiler/src/utils/compiler.ts
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index 000000000..3731385e2
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+++ b/packages/sol-compiler/src/utils/compiler.ts
@@ -0,0 +1,107 @@
+import { ContractSource, ContractSources } from '@0xproject/sol-resolver';
+import { logUtils } from '@0xproject/utils';
+import * as _ from 'lodash';
+import * as path from 'path';
+import * as solc from 'solc';
+
+import { constants } from './constants';
+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<ContractArtifact | void> {
+ 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<void> {
+ 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');
+ }
+ 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;
+}