refactor: refactor the code base and update linting rules

.eslintrc.json

@@ -39,6 +39,7 @@
     "@typescript-eslint/no-unsafe-member-access": "off",
     "@typescript-eslint/no-unsafe-return": "off",
     "import/no-relative-parent-imports": "error",
+    "functional/prefer-readonly-type": "off",
     "node/no-unsupported-features/es-builtins": "off",
     "node/no-unsupported-features/es-syntax": "off",
     "promise/prefer-await-to-callbacks": "off",
@@ -57,7 +58,37 @@
     {
       "files": ["./src/**/*"],
       "extends": ["plugin:eslint-plugin/recommended"],
-      "rules": {}
+      "rules": {
+        "functional/no-expression-statement": "error"
+      }
+    },
+    // Rule util file.
+    {
+      "files": ["./src/util/rule.ts"],
+      "rules": {
+        "@typescript-eslint/prefer-readonly-parameter-types": "warn"
+      }
+    },
+    // Typeguard files.
+    {
+      "files": ["./src/util/typeguard.ts"],
+      "rules": {
+        "jsdoc/require-jsdoc": "off"
+      }
+    },
+    // Test files.
+    {
+      "files": ["./tests/**/*"],
+      "rules": {
+        "jsdoc/require-jsdoc": "off"
+      }
+    },
+    // CZ Adapter files.
+    {
+      "files": ["./cz-adapter/**/*"],
+      "rules": {
+        "jsdoc/require-jsdoc": "off"
+      }
     },
     // FIXME: This override is defined in the upsteam; it shouldn't need to be redefined here. Why?
     {

cz-adapter/engine.ts

@@ -5,16 +5,16 @@ import { rules } from "~/rules";
 
 import type { Options } from "./options";
 
-type Answers = {
-  readonly type: string;
-  readonly scope?: string;
-  readonly scopeRules?: string;
-  readonly subject: string;
-  readonly body?: string;
-  readonly isBreaking: boolean;
-  readonly isIssueAffected: boolean;
-  readonly issues?: string;
-};
+type Answers = Readonly<{
+  type: string;
+  scope?: string;
+  scopeRules?: string;
+  subject: string;
+  body?: string;
+  isBreaking: boolean;
+  isIssueAffected: boolean;
+  issues?: string;
+}>;
 
 type CZ = any;
 

cz-adapter/options.ts

@@ -1,4 +1,5 @@
 import { types as conventionalCommitTypes } from "conventional-commit-types";
+import type { ReadonlyDeep } from "type-fest";
 
 // Override the descriptions of some of the types.
 const types = {
@@ -48,13 +49,13 @@ const types = {
   },
 };
 
-const defaults: {
-  readonly defaultType: string | undefined;
-  readonly defaultScope: string | undefined;
-  readonly defaultSubject: string | undefined;
-  readonly defaultBody: string | undefined;
-  readonly defaultIssues: string | undefined;
-} = {
+const defaults: Readonly<{
+  defaultType: string | undefined;
+  defaultScope: string | undefined;
+  defaultSubject: string | undefined;
+  defaultBody: string | undefined;
+  defaultIssues: string | undefined;
+}> = {
   defaultType: process.env.CZ_TYPE,
   defaultScope: process.env.CZ_SCOPE,
   defaultSubject: process.env.CZ_SUBJECT,
@@ -71,6 +72,6 @@ const options = {
   maxLineWidth: 100,
 };
 
-export type Options = typeof options;
+export type Options = ReadonlyDeep<typeof options>;
 
 export default options;

docs/rules/functional-parameters.md

@@ -112,7 +112,7 @@ Any function that take takes multiple parameter can be rewritten as a higher-ord
 
 Example:
 
-<!-- eslint-disable no-redeclare -->
+<!-- eslint-disable @typescript-eslint/no-redeclare -->
 
 ```js
 // This function

package.json

@@ -62,7 +62,7 @@
     "verify": "yarn build && yarn lint && yarn build-tests && yarn test-compiled && rimraf build"
   },
   "dependencies": {
-    "@typescript-eslint/experimental-utils": "^5.0.0",
+    "@typescript-eslint/utils": "^5.10.0",
     "deepmerge-ts": "^2.0.1",
     "escape-string-regexp": "^4.0.0"
   },
@@ -71,7 +71,7 @@
     "@commitlint/config-conventional": "^14.1.0",
     "@google/semantic-release-replace-plugin": "^1.1.0",
     "@istanbuljs/nyc-config-typescript": "^1.0.1",
-    "@rebeccastevens/eslint-config": "^1.1.5",
+    "@rebeccastevens/eslint-config": "^1.2.1",
     "@rollup/plugin-commonjs": "^21.0.0",
     "@rollup/plugin-json": "^4.1.0",
     "@rollup/plugin-node-resolve": "^13.0.5",
@@ -87,8 +87,8 @@
     "@types/estree": "^0.0.50",
     "@types/node": "16.11.0",
     "@types/rollup-plugin-auto-external": "^2.0.2",
-    "@typescript-eslint/eslint-plugin": "^5.0.0",
-    "@typescript-eslint/parser": "^5.0.0",
+    "@typescript-eslint/eslint-plugin": "^5.10.0",
+    "@typescript-eslint/parser": "^5.10.0",
     "ava": "^3.15.0",
     "babel-eslint": "^10.1.0",
     "chalk": "^4.1.2",
@@ -131,6 +131,7 @@
     "tsconfig-paths": "^3.10.1",
     "tslib": "^2.0.3",
     "tsutils": "^3.21.0",
+    "type-fest": "^2.9.0",
     "typescript": "^4.4.4",
     "word-wrap": "^1.2.3"
   },