feat(@nomiclabs/hardhat-solhint): load .solhintignore file

.changeset/dull-spies-hope.md

@@ -0,0 +1,5 @@
+---
+"@nomiclabs/hardhat-solhint": minor
+---
+
+Load .solhintignore file.

packages/hardhat-solhint/src/index.ts

@@ -1,7 +1,7 @@
 import * as fs from "fs";
 import { subtask, task } from "hardhat/config";
 import { NomicLabsHardhatPluginError } from "hardhat/internal/core/errors";
-import { join } from "path";
+import { join, relative } from "path";
 
 function getDefaultConfig() {
   return {
@@ -43,6 +43,19 @@ async function hasConfigFile(rootDirectory: string) {
   return false;
 }
 
+function readIgnore(rootDirectory: string) {
+  try {
+    return fs
+      .readFileSync(join(rootDirectory, ".solhintignore"))
+      .toString()
+      .split("\n")
+      .map((i) => i.trim())
+      .filter(Boolean);
+  } catch (e) {
+    return [];
+  }
+}
+
 async function getSolhintConfig(rootDirectory: string) {
   let solhintConfig;
   const {
@@ -73,6 +86,14 @@ async function getSolhintConfig(rootDirectory: string) {
     );
   }
 
+  const configExcludeFiles = Array.isArray(solhintConfig.excludedFiles)
+    ? solhintConfig.excludedFiles
+    : [];
+  solhintConfig.excludedFiles = [
+    ...configExcludeFiles,
+    ...readIgnore(rootDirectory),
+  ];
+
   return solhintConfig;
 }
 
@@ -84,7 +105,10 @@ function printReport(reports: any) {
 subtask("hardhat-solhint:run-solhint", async (_, { config }) => {
   const { processPath } = require("solhint/lib/index");
   return processPath(
-    join(config.paths.sources, "**", "*.sol").replace(/\\/g, "/"),
+    relative(
+      config.paths.root,
+      join(config.paths.sources, "**", "*.sol")
+    ).replace(/\\/g, "/"),
     await getSolhintConfig(config.paths.root)
   );
 });

packages/hardhat-solhint/test/fixture-projects/solhintignore-project/.solhint.json

@@ -0,0 +1,4 @@
+{
+  "extends": "solhint:all",
+  "excludedFiles": ["contracts/Greeter3.sol"]
+}

packages/hardhat-solhint/test/fixture-projects/solhintignore-project/.solhintignore

@@ -0,0 +1 @@
+contracts/Greeter2.sol

packages/hardhat-solhint/test/fixture-projects/solhintignore-project/contracts/Greeter.sol

@@ -0,0 +1,17 @@
+pragma solidity ^0.5.1;
+
+
+contract Greeter {
+
+    string greeting;
+    string bad;
+    constructor(string memory _greeting) public {
+        greeting = _greeting;
+        bad = "baaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaad";
+    }
+
+    function greet() public view returns (string memory) {
+        return greeting;
+    }
+
+}

packages/hardhat-solhint/test/fixture-projects/solhintignore-project/contracts/Greeter2.sol

@@ -0,0 +1,15 @@
+pragma solidity ^0.5.1;
+
+contract Greeter2 {
+    string greeting;
+    string bad;
+
+    constructor(string memory _greeting) public {
+        greeting = _greeting;
+        bad = "baaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaad";
+    }
+
+    function greet() public view returns (string memory) {
+        return greeting;
+    }
+}

packages/hardhat-solhint/test/fixture-projects/solhintignore-project/contracts/Greeter3.sol

@@ -0,0 +1,15 @@
+pragma solidity ^0.5.1;
+
+contract Greeter3 {
+    string greeting;
+    string bad;
+
+    constructor(string memory _greeting) public {
+        greeting = _greeting;
+        bad = "baaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaad";
+    }
+
+    function greet() public view returns (string memory) {
+        return greeting;
+    }
+}

packages/hardhat-solhint/test/fixture-projects/solhintignore-project/hardhat.config.js

@@ -0,0 +1,5 @@
+require("../../../src/index");
+
+module.exports = {
+  solidity: "0.5.15",
+};

packages/hardhat-solhint/test/tests.ts

@@ -44,6 +44,32 @@ describe("Solhint plugin", function () {
     });
   });
 
+  describe("Project with .solhintignore file", function () {
+    useEnvironment("solhintignore-project");
+
+    it("should not return a report for the ignored files", async function () {
+      const reports = await this.env.run("hardhat-solhint:run-solhint");
+      // Greeter.sol is not ignored, Solhint should return a report
+      assert.isTrue(
+        reports.some((report: any) =>
+          report.file.includes("contracts/Greeter.sol")
+        )
+      );
+      // Greeter2.sol is ignored in the .solhintignore file, Solhint should not return a report
+      assert.isFalse(
+        reports.some((report: any) =>
+          report.file.includes("contracts/Greeter2.sol")
+        )
+      );
+      // Greeter3.sol is ignored in the .solhint.json file, Solhint should not return a report
+      assert.isFalse(
+        reports.some((report: any) =>
+          report.file.includes("contracts/Greeter2.sol")
+        )
+      );
+    });
+  });
+
   describe("Project with no solhint config", function () {
     useEnvironment("no-config-project");