docs: detect and fix broken links

.github/workflows/ci.yml

@@ -33,6 +33,12 @@ jobs:
       run: npm run lint:scss
     - name: Lint Docs JS Files
       run: node Makefile lintDocsJS
+    - name: Build Docs Website
+      working-directory: docs
+      run: npm run build
+    - name: Validate internal links
+      working-directory: docs
+      run: npm run lint:links
 
   test_on_node:
     name: Test

conf/rule-type-list.json

@@ -6,12 +6,12 @@
     ],
     "deprecated": {
         "name": "Deprecated",
-        "description": "These rules have been deprecated in accordance with the <a href=\"/docs/use/rule-deprecation\">deprecation policy</a>, and replaced by newer rules:",
+        "description": "These rules have been deprecated in accordance with the <a href=\"{{ '/use/rule-deprecation' | url }}\">deprecation policy</a>, and replaced by newer rules:",
         "rules": []
     },
     "removed": {
         "name": "Removed",
-        "description": "These rules from older versions of ESLint (before the <a href=\"/docs/use/rule-deprecation\">deprecation policy</a> existed) have been replaced by newer rules:",
+        "description": "These rules from older versions of ESLint (before the <a href=\"{{ '/use/rule-deprecation' | url }}\">deprecation policy</a> existed) have been replaced by newer rules:",
         "rules": [
             { "removed": "generator-star", "replacedBy": ["generator-star-spacing"] },
             { "removed": "global-strict", "replacedBy": ["strict"] },

docs/package.json

@@ -19,6 +19,7 @@
         "start": "npm-run-all build:sass build:postcss --parallel watch:*",
         "build": "npm-run-all build:sass build:postcss build:eleventy images",
         "lint:scss": "stylelint \"**/*.{scss,html}\"",
+        "lint:links": "cross-env NODE_OPTIONS=--max-old-space-size=4096 node tools/validate-links.js",
         "lint:fix:scss": "npm run lint:scss -- --fix"
     },
     "devDependencies": {
@@ -27,15 +28,18 @@
         "@11ty/eleventy-navigation": "^0.3.2",
         "@11ty/eleventy-plugin-rss": "^1.1.1",
         "@11ty/eleventy-plugin-syntaxhighlight": "^3.1.2",
+        "@munter/tap-render": "^0.2.0",
         "@types/markdown-it": "^12.2.3",
         "algoliasearch": "^4.12.1",
         "autoprefixer": "^10.4.13",
+        "cross-env": "^7.0.3",
         "cssnano": "^5.1.14",
         "dom-parser": "^0.1.6",
         "eleventy-plugin-nesting-toc": "^1.3.0",
         "eleventy-plugin-page-assets": "^0.3.0",
         "eleventy-plugin-reading-time": "^0.0.1",
         "github-slugger": "^1.5.0",
+        "hyperlink": "^5.0.4",
         "imagemin": "^8.0.1",
         "imagemin-cli": "^7.0.0",
         "js-yaml": "^3.14.1",
@@ -53,7 +57,8 @@
         "stylelint": "^14.13.0",
         "stylelint-config-html": "^1.1.0",
         "stylelint-config-standard": "^29.0.0",
-        "stylelint-config-standard-scss": "^5.0.0"
+        "stylelint-config-standard-scss": "^5.0.0",
+        "tap-spot": "^1.1.2"
     },
     "engines": {
         "node": ">=14.0.0"

docs/src/_data/rules.json

@@ -1893,7 +1893,7 @@
     ],
     "deprecated": {
         "name": "Deprecated",
-        "description": "These rules have been deprecated in accordance with the <a href=\"/docs/use/rule-deprecation\">deprecation policy</a>, and replaced by newer rules:",
+        "description": "These rules have been deprecated in accordance with the <a href=\"{{ '/use/rule-deprecation' | url }}\">deprecation policy</a>, and replaced by newer rules:",
         "rules": [
             {
                 "name": "callback-return",
@@ -2009,7 +2009,7 @@
     },
     "removed": {
         "name": "Removed",
-        "description": "These rules from older versions of ESLint (before the <a href=\"/docs/use/rule-deprecation\">deprecation policy</a> existed) have been replaced by newer rules:",
+        "description": "These rules from older versions of ESLint (before the <a href=\"{{ '/use/rule-deprecation' | url }}\">deprecation policy</a> existed) have been replaced by newer rules:",
         "rules": [
             {
                 "removed": "generator-star",

docs/src/extend/custom-rules-deprecated.md

@@ -37,7 +37,7 @@ module.exports.schema = []; // no options
 
 ## Rule Basics
 
-`schema` (array) specifies the [options](#options-schemas) so ESLint can prevent invalid [rule configurations](../use/configure/rules#configuring-rules)
+`schema` (array) specifies the [options](#options-schemas) so ESLint can prevent invalid [rule configurations](../use/configure/rules)
 
 `create` (function) returns an object with methods that ESLint calls to "visit" nodes while traversing the abstract syntax tree (AST as defined by [ESTree](https://github.com/estree/estree)) of JavaScript code:
 

docs/src/extend/custom-rules.md

@@ -61,7 +61,7 @@ The source file for a rule exports an object with the following properties.
 
      **Important:** the `hasSuggestions` property is mandatory for rules that provide suggestions. If this property isn't set to `true`, ESLint will throw an error whenever the rule attempts to produce a suggestion. Omit the `hasSuggestions` property if the rule does not provide suggestions.
 
-* `schema` (array) specifies the [options](#options-schemas) so ESLint can prevent invalid [rule configurations](../use/configure/rules#configuring-rules)
+* `schema` (array) specifies the [options](#options-schemas) so ESLint can prevent invalid [rule configurations](../use/configure/rules)
 
 * `deprecated` (boolean) indicates whether the rule has been deprecated.  You may omit the `deprecated` property if the rule has not been deprecated.
 
@@ -110,7 +110,7 @@ The `context` object contains additional functionality that is helpful for rules
 
 * `parserOptions` - the parser options configured for this run (more details [here](../use/configure/language-options#specifying-parser-options)).
 * `id` - the rule ID.
-* `options` - an array of the [configured options](../use/configure/rules#configuring-rules) for this rule. This array does not include the rule severity. For more information, see [here](#contextoptions).
+* `options` - an array of the [configured options](../use/configure/rules) for this rule. This array does not include the rule severity. For more information, see [here](#contextoptions).
 * `settings` - the [shared settings](../use/configure/configuration-files#adding-shared-settings) from configuration.
 * `parserPath` - the name of the `parser` from configuration.
 * `parserServices` - an object containing parser-provided services for rules. The default parser does not provide any services. However, if a rule is intended to be used with a custom parser, it could use `parserServices` to access anything provided by that parser. (For example, a TypeScript parser could provide the ability to get the computed type of a given node.)

docs/src/use/configure/index.md

@@ -42,7 +42,7 @@ All of these options give you fine-grained control over how ESLint treats your c
 
 [**Configure Rules**](rules)
 
-* [Configuring Rules](./rules#configuring-rules)
+* [Configuring Rules](./rules)
 * [Disabling Rules](./rules#disabling-rules)
 
 [**Configure Plugins**](plugins)

docs/tools/validate-links.js

@@ -0,0 +1,49 @@
+const path = require("path");
+const TapRender = require("@munter/tap-render");
+const spot = require("tap-spot");
+const hyperlink = require("hyperlink");
+
+const tapRenderInstance = new TapRender();
+
+tapRenderInstance.pipe(spot()).pipe(process.stdout);
+
+const skipPatterns = [
+    "https://",
+    "fragment-redirect",
+    "migrating-to",
+    "/blog",
+    "/play",
+    "/team",
+    "/donate",
+    "/docs/latest",
+    `src="null"`,
+];
+
+const skipFilter = (report) =>
+    Object.values(report).some((value) =>
+        skipPatterns.some((pattern) => String(value).includes(pattern))
+    );
+
+(async () => {
+    try {
+        await hyperlink(
+            {
+                inputUrls: ["../_site/index.html"],
+                root: path.resolve(__dirname, "../_site"),
+                canonicalRoot: "https://eslint.org/docs/head/",
+                recursive: true,
+                internalOnly: true,
+                pretty: true,
+                concurrency: 25,
+                skipFilter,
+            },
+            tapRenderInstance
+        );
+    } catch (err) {
+        console.log(err.stack);
+        process.exit(1);
+    }
+    const results = tapRenderInstance.close();
+
+    process.exit(results.fail ? 1 : 0);
+})();