Merge branch 'v-next' of github.com:NomicFoundation/hardhat into esmi…

…fy-compilation-against-vnext

v-next/hardhat-utils/src/fs.ts

@@ -135,6 +135,7 @@ export async function isDirectory(absolutePath: string): Promise<boolean> {
  * @returns The parsed JSON object.
  * @throws FileNotFoundError if the file doesn't exist.
  * @throws InvalidFileFormatError if the file is not a valid JSON file.
+ * @throws IsDirectoryError if the path is a directory instead of a file.
  * @throws FileSystemAccessError for any other error.
  */
 export async function readJsonFile<T>(absolutePathToFile: string): Promise<T> {
@@ -177,6 +178,7 @@ export async function writeJsonFile<T>(
  * @param absolutePathToFile The path to the file.
  * @returns The content of the file as a string.
  * @throws FileNotFoundError if the file doesn't exist.
+ * @throws IsDirectoryError if the path is a directory instead of a file.
  * @throws FileSystemAccessError for any other error.
  */
 export async function readUtf8File(
@@ -186,10 +188,15 @@ export async function readUtf8File(
     return await fsPromises.readFile(absolutePathToFile, { encoding: "utf8" });
   } catch (e) {
     ensureError<NodeJS.ErrnoException>(e);
+
     if (e.code === "ENOENT") {
       throw new FileNotFoundError(absolutePathToFile, e);
     }
 
+    if (e.code === "EISDIR") {
+      throw new IsDirectoryError(absolutePathToFile, e);
+    }
+
     throw new FileSystemAccessError(e.message, e);
   }
 }

v-next/hardhat-utils/test/fs.ts

@@ -469,6 +469,16 @@ describe("File system utils", () => {
       expectTypeOf(await readUtf8File(filePath)).toMatchTypeOf<string>();
     });
 
+    it("Should throw IsDirectoryError if the path is a dir and not a file", async () => {
+      const dirPath = path.join(getTmpDir(), "dir-name");
+      await mkdir(dirPath);
+
+      await assert.rejects(readUtf8File(dirPath), {
+        name: "IsDirectoryError",
+        message: `Path ${dirPath} is a directory`,
+      });
+    });
+
     it("Should throw FileNotFoundError if the file doesn't exist", async () => {
       const filePath = path.join(getTmpDir(), "not-exists.txt");
 
@@ -478,6 +488,16 @@ describe("File system utils", () => {
       });
     });
 
+    it("Should throw IsDirectoryError if the path is a dir and not a file", async () => {
+      const dirPath = path.join(getTmpDir(), "dir-name");
+      await mkdir(dirPath);
+
+      await assert.rejects(readUtf8File(dirPath), {
+        name: "IsDirectoryError",
+        message: `Path ${dirPath} is a directory`,
+      });
+    });
+
     it("Should throw FileSystemAccessError if a different error is thrown", async () => {
       const invalidPath = "\0";