From e80fa6e311e7f975e2e9f47b0dec65829894bde3 Mon Sep 17 00:00:00 2001
From: Leonid Logvinov <logvinov.leon@gmail.com>
Date: Fri, 3 Aug 2018 13:42:47 +0200
Subject: Read truffle compiler config from truffle.js and assert that the
 passed solidity version matches the one in artifacts

---
 .../artifact_adapters/truffle_artifact_adapter.ts  | 58 +++++++++++++++++++---
 1 file changed, 51 insertions(+), 7 deletions(-)

(limited to 'packages')

diff --git a/packages/sol-cov/src/artifact_adapters/truffle_artifact_adapter.ts b/packages/sol-cov/src/artifact_adapters/truffle_artifact_adapter.ts
index 53b77aed5..c662b62b1 100644
--- a/packages/sol-cov/src/artifact_adapters/truffle_artifact_adapter.ts
+++ b/packages/sol-cov/src/artifact_adapters/truffle_artifact_adapter.ts
@@ -1,25 +1,40 @@
 import { Compiler, CompilerOptions } from '@0xproject/sol-compiler';
-import * as rimraf from 'rimraf';
+import * as fs from 'fs';
+import * as glob from 'glob';
+import * as path from 'path';
 
 import { ContractData } from '../types';
 
 import { AbstractArtifactAdapter } from './abstract_artifact_adapter';
 import { SolCompilerArtifactAdapter } from './sol_compiler_artifact_adapter';
 
+const DEFAULT_TRUFFLE_ARTIFACTS_DIR = './build/contracts';
+
+interface TruffleConfig {
+    solc?: any;
+    contracts_build_directory?: string;
+}
+
 export class TruffleArtifactAdapter extends AbstractArtifactAdapter {
     private readonly _solcVersion: string;
-    private readonly _sourcesPath: string;
-    constructor(sourcesPath: string, solcVersion: string) {
+    private readonly _projectRoot: string;
+    constructor(projectRoot: string, solcVersion: string) {
         super();
         this._solcVersion = solcVersion;
-        this._sourcesPath = sourcesPath;
+        this._projectRoot = projectRoot;
     }
     public async collectContractsDataAsync(): Promise<ContractData[]> {
         const artifactsDir = '.0x-artifacts';
+        const contractsDir = path.join(this._projectRoot, 'contracts');
+        const truffleConfig = this._getTruffleConfig();
+        const solcConfig = truffleConfig.solc || {};
+        const truffleArtifactsDirectory = truffleConfig.contracts_build_directory || DEFAULT_TRUFFLE_ARTIFACTS_DIR;
+        this._assertSolidityVersionIsCorrect(truffleArtifactsDirectory);
         const compilerOptions: CompilerOptions = {
-            contractsDir: this._sourcesPath,
+            contractsDir,
             artifactsDir,
             compilerSettings: {
+                ...solcConfig,
                 outputSelection: {
                     ['*']: {
                         ['*']: ['abi', 'evm.bytecode.object', 'evm.deployedBytecode.object'],
@@ -31,9 +46,38 @@ export class TruffleArtifactAdapter extends AbstractArtifactAdapter {
         };
         const compiler = new Compiler(compilerOptions);
         await compiler.compileAsync();
-        const solCompilerArtifactAdapter = new SolCompilerArtifactAdapter(artifactsDir, this._sourcesPath);
+        const solCompilerArtifactAdapter = new SolCompilerArtifactAdapter(artifactsDir, contractsDir);
         const contractsDataFrom0xArtifacts = await solCompilerArtifactAdapter.collectContractsDataAsync();
-        rimraf.sync(artifactsDir);
         return contractsDataFrom0xArtifacts;
     }
+    private _getTruffleConfig(): TruffleConfig {
+        const truffleConfigFileShort = path.resolve(path.join(this._projectRoot, 'truffle.js'));
+        const truffleConfigFileLong = path.resolve(path.join(this._projectRoot, 'truffle-config.js'));
+        if (fs.existsSync(truffleConfigFileShort)) {
+            const truffleConfig = require(truffleConfigFileShort);
+            return truffleConfig;
+        } else if (fs.existsSync(truffleConfigFileLong)) {
+            const truffleConfig = require(truffleConfigFileLong);
+            return truffleConfig;
+        } else {
+            throw new Error(
+                `Neither ${truffleConfigFileShort} nor ${truffleConfigFileLong} exists. Make sure the project root is correct`,
+            );
+        }
+    }
+    private _assertSolidityVersionIsCorrect(truffleArtifactsDirectory: string): void {
+        const artifactsGlob = `${truffleArtifactsDirectory}/**/*.json`;
+        const artifactFileNames = glob.sync(artifactsGlob, { absolute: true });
+        for (const artifactFileName of artifactFileNames) {
+            const artifact = JSON.parse(fs.readFileSync(artifactFileName).toString());
+            const compilerVersion = artifact.compiler.version;
+            if (!compilerVersion.startsWith(this._solcVersion)) {
+                throw new Error(
+                    `${artifact.contractName} was compiled with solidity ${compilerVersion} but specified version is ${
+                        this._solcVersion
+                    } it will make sol-cov unable to process traces. Please pass the correct version`,
+                );
+            }
+        }
+    }
 }
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