chore: Remove unused code (#36)

* chore: Remove unused unIndent test helper

* chore: Remove unused createCustomTeardown test helper

This also allows us to remove the `fs-teardown` dependency.

* chore: Remove re-export test helper

With the other two unused helpers removed, `index.js` now just
re-exports a single import. This commit removes it and updates the two
imports to point to the underlying file.

* chore: Remove unused error.messageTemplate

ESLint's CLI uses `.messageTemplate` to pretty-print errors, but no such
functionality exists in `@eslint/create-config`.

lib/init/npm-utils.js

@@ -101,24 +101,12 @@ function fetchPeerDependencies(packageName) {
 function check(packages, opt) {
     const deps = new Set();
     const pkgJson = (opt) ? findPackageJson(opt.startDir) : findPackageJson();
-    let fileJson;
 
     if (!pkgJson) {
         throw new Error("Could not find a package.json file. Run 'npm init' to create one.");
     }
 
-    try {
-        fileJson = JSON.parse(fs.readFileSync(pkgJson, "utf8"));
-    } catch (e) {
-        const error = new Error(e);
-
-        error.messageTemplate = "failed-to-read-json";
-        error.messageData = {
-            path: pkgJson,
-            message: e.message
-        };
-        throw error;
-    }
+    const fileJson = JSON.parse(fs.readFileSync(pkgJson, "utf8"));
 
     ["dependencies", "devDependencies"].forEach(key => {
         if (opt[key] && typeof fileJson[key] === "object") {

package.json

@@ -62,7 +62,6 @@
         "eslint-release": "^3.2.0",
         "esmock": "^1.8.8",
         "espree": "^9.0.0",
-        "fs-teardown": "^0.3.0",
         "lint-staged": "^12.1.2",
         "memfs": "^3.4.0",
         "mocha": "^9.1.3",

tests/init/config-initializer.js

@@ -16,7 +16,7 @@ import sh from "shelljs";
 import esmock from "esmock";
 import { fileURLToPath } from "url";
 import * as npmUtils from "../../lib/init/npm-utils.js";
-import { defineInMemoryFs } from "../_utils/index.js";
+import { defineInMemoryFs } from "../_utils/in-memory-fs.js";
 
 const originalDir = process.cwd();
 const { assert } = chai;

tests/init/npm-utils.js

@@ -17,7 +17,7 @@ import {
     checkDeps,
     checkDevDeps
 } from "../../lib/init/npm-utils.js";
-import { defineInMemoryFs } from "../_utils/index.js";
+import { defineInMemoryFs } from "../_utils/in-memory-fs.js";
 import esmock from "esmock";
 
 const { assert } = chai;
@@ -89,13 +89,8 @@ describe("npmUtils", () => {
             });
 
             assert.throws(() => {
-                try {
-                    stubcheckDevDeps(["some-package"]);
-                } catch (error) {
-                    assert.strictEqual(error.messageTemplate, "failed-to-read-json");
-                    throw error;
-                }
-            }, "SyntaxError: Unexpected token v");
+                stubcheckDevDeps(["some-package"]);
+            }, /Unexpected token v/u);
         });
     });
 
@@ -148,13 +143,8 @@ describe("npmUtils", () => {
             });
 
             assert.throws(() => {
-                try {
-                    stubbedcheckDeps(["some-package"]);
-                } catch (error) {
-                    assert.strictEqual(error.messageTemplate, "failed-to-read-json");
-                    throw error;
-                }
-            }, "SyntaxError: Unexpected token v");
+                stubbedcheckDeps(["some-package"]);
+            }, /Unexpected token v/u);
         });
     });