Print the evm versions used when compiling (#4414)

.changeset/spotty-tomatoes-press.md

@@ -0,0 +1,5 @@
+---
+"hardhat": patch
+---
+
+Updated the compilation logs to include the targeted EVM versions.

packages/hardhat-core/src/builtin-tasks/compile.ts

@@ -40,6 +40,7 @@ import { getFullyQualifiedName } from "../utils/contract-names";
 import { localPathToSourceName } from "../utils/source-names";
 
 import { getAllFilesMatching } from "../internal/util/fs-utils";
+import { getEvmVersionFromSolcVersion } from "../internal/solidity/compiler/solc-info";
 import {
   TASK_COMPILE,
   TASK_COMPILE_GET_COMPILATION_TASKS,
@@ -1291,15 +1292,43 @@ subtask(TASK_COMPILE_SOLIDITY_LOG_COMPILATION_RESULT)
   .setAction(
     async ({ compilationJobs }: { compilationJobs: CompilationJob[] }) => {
       let count = 0;
+      const evmVersions = new Set<string>();
+      const unknownEvmVersions = new Set<string>();
+
       for (const job of compilationJobs) {
         count += job
           .getResolvedFiles()
           .filter((file) => job.emitsArtifacts(file)).length;
+
+        const solcVersion = job.getSolcConfig().version;
+        const evmTarget =
+          job.getSolcConfig().settings?.evmVersion ??
+          getEvmVersionFromSolcVersion(solcVersion);
+
+        if (evmTarget !== undefined) {
+          evmVersions.add(evmTarget);
+        } else {
+          unknownEvmVersions.add(
+            `unknown evm version for solc version ${solcVersion}`
+          );
+        }
       }
 
+      const targetVersionsList = Array.from(evmVersions)
+        // Alphabetically sort evm versions. The unknown ones are added at the end
+        .sort()
+        .concat(Array.from(unknownEvmVersions).sort());
+
       if (count > 0) {
         console.log(
-          `Compiled ${count} Solidity ${pluralize(count, "file")} successfully`
+          `Compiled ${count} Solidity ${pluralize(
+            count,
+            "file"
+          )} successfully (evm ${pluralize(
+            targetVersionsList.length,
+            "target",
+            "targets"
+          )}: ${targetVersionsList.join(", ")}).`
         );
       }
     }

packages/hardhat-core/src/internal/solidity/compiler/solc-info.ts

@@ -0,0 +1,67 @@
+const defaultEvmTargets: { [key: string]: string } = {
+  "0.5.1": "byzantium",
+  "0.5.2": "byzantium",
+  "0.5.3": "byzantium",
+  "0.5.4": "byzantium",
+  "0.5.5": "petersburg",
+  "0.5.6": "petersburg",
+  "0.5.7": "petersburg",
+  "0.5.8": "petersburg",
+  "0.5.9": "petersburg",
+  "0.5.10": "petersburg",
+  "0.5.11": "petersburg",
+  "0.5.12": "petersburg",
+  "0.5.13": "petersburg",
+  "0.5.14": "istanbul",
+  "0.5.15": "istanbul",
+  "0.5.16": "istanbul",
+  "0.5.17": "istanbul",
+  "0.6.0": "istanbul",
+  "0.6.1": "istanbul",
+  "0.6.2": "istanbul",
+  "0.6.3": "istanbul",
+  "0.6.4": "istanbul",
+  "0.6.5": "istanbul",
+  "0.6.6": "istanbul",
+  "0.6.7": "istanbul",
+  "0.6.8": "istanbul",
+  "0.6.9": "istanbul",
+  "0.6.10": "istanbul",
+  "0.6.11": "istanbul",
+  "0.6.12": "istanbul",
+  "0.7.0": "istanbul",
+  "0.7.1": "istanbul",
+  "0.7.2": "istanbul",
+  "0.7.3": "istanbul",
+  "0.7.4": "istanbul",
+  "0.7.5": "istanbul",
+  "0.7.6": "istanbul",
+  "0.8.0": "istanbul",
+  "0.8.1": "istanbul",
+  "0.8.2": "istanbul",
+  "0.8.3": "istanbul",
+  "0.8.4": "istanbul",
+  "0.8.5": "berlin",
+  "0.8.6": "berlin",
+  "0.8.7": "london",
+  "0.8.8": "london",
+  "0.8.9": "london",
+  "0.8.10": "london",
+  "0.8.11": "london",
+  "0.8.12": "london",
+  "0.8.13": "london",
+  "0.8.14": "london",
+  "0.8.15": "london",
+  "0.8.16": "london",
+  "0.8.17": "london",
+  "0.8.18": "paris",
+  "0.8.19": "paris",
+  "0.8.20": "shanghai",
+  "0.8.21": "shanghai",
+};
+
+export function getEvmVersionFromSolcVersion(
+  solcVersion: string
+): string | undefined {
+  return defaultEvmTargets[solcVersion];
+}

packages/hardhat-core/test/builtin-tasks/compile.ts

@@ -2,7 +2,7 @@ import { assert, expect } from "chai";
 import ci from "ci-info";
 import * as fsExtra from "fs-extra";
 import * as path from "path";
-
+import sinon from "sinon";
 import {
   TASK_COMPILE_SOLIDITY_GET_COMPILATION_JOBS_FAILURE_REASONS,
   TASK_COMPILE_SOLIDITY_READ_FILE,
@@ -141,6 +141,25 @@ describe("compile task", function () {
     });
   });
 
+  describe("project with multiple different evm versions", function () {
+    useFixtureProject("compilation-multiple-files-different-evm-versions");
+    useEnvironment();
+
+    it("should compile and show a message listing all the evm versions used", async function () {
+      const spyFunctionConsoleLog = sinon.stub(console, "log");
+
+      await this.env.run("compile");
+
+      assert(
+        spyFunctionConsoleLog.calledWith(
+          "Compiled 4 Solidity files successfully (evm targets: paris, petersburg, shanghai, unknown evm version for solc version 0.4.11)."
+        )
+      );
+
+      spyFunctionConsoleLog.restore();
+    });
+  });
+
   describe("TASK_COMPILE_SOLIDITY_READ_FILE", function () {
     describe("Import folder", () => {
       const folderName = "compilation-single-file";

packages/hardhat-core/test/fixture-projects/compilation-multiple-files-different-evm-versions/.gitignore

@@ -0,0 +1,2 @@
+artifacts/
+cache/

packages/hardhat-core/test/fixture-projects/compilation-multiple-files-different-evm-versions/contracts/A.sol

@@ -0,0 +1,4 @@
+// SPDX-License-Identifier: UNLICENSED
+pragma solidity 0.8.21;
+
+contract A {}

packages/hardhat-core/test/fixture-projects/compilation-multiple-files-different-evm-versions/contracts/B.sol

@@ -0,0 +1,4 @@
+// SPDX-License-Identifier: UNLICENSED
+pragma solidity 0.8.20;
+
+contract B {}

packages/hardhat-core/test/fixture-projects/compilation-multiple-files-different-evm-versions/contracts/C.sol

@@ -0,0 +1,4 @@
+// SPDX-License-Identifier: UNLICENSED
+pragma solidity 0.4.11;
+
+contract C {}

packages/hardhat-core/test/fixture-projects/compilation-multiple-files-different-evm-versions/contracts/D.sol

@@ -0,0 +1,4 @@
+// SPDX-License-Identifier: UNLICENSED
+pragma solidity 0.5.5;
+
+contract D {}

packages/hardhat-core/test/fixture-projects/compilation-multiple-files-different-evm-versions/hardhat.config.js

@@ -0,0 +1,24 @@
+module.exports = {
+  solidity: {
+    compilers: [
+      {
+        version: "0.4.11", // Value not present in solc-info.ts file
+      },
+      {
+        version: "0.5.5", // Value taken from solc-info.ts file
+      },
+      {
+        version: "0.8.20",
+        settings: {
+          evmVersion: "paris", // Overwrite default value in solc-info.ts file
+        },
+      },
+      {
+        version: "0.8.21",
+        settings: {
+          evmVersion: "shanghai", // Same as default value in solc-info.ts file
+        },
+      },
+    ],
+  },
+};