feat: support ReferenceLink

.gitignore

@@ -1,3 +1,4 @@
 .DS_Store
 node_modules
 lib
+*.log

.mocharc.json

@@ -0,0 +1,6 @@
+{
+  "require": [
+    "textlint-scripts/register"
+  ],
+  "timeout": "20000"
+}

package.json

@@ -4,7 +4,9 @@
   "description": "A textlint rule to check if all links are alive",
   "keywords": [
     "rule",
-    "textlint"
+    "textlint",
+    "textlintrule",
+    "link-checker"
   ],
   "homepage": "https://github.com/textlint-rule/textlint-rule-no-dead-link",
   "bugs": "https://github.com/textlint-rule/textlint-rule-no-dead-link/issues",
@@ -18,10 +20,8 @@
   "main": "lib/no-dead-link.js",
   "scripts": {
     "build": "textlint-scripts build",
-    "lint": "eslint --fix src test",
-    "unittest": "textlint-scripts test",
     "prepublish": "yarn run --if-present build",
-    "test": "npm-run-all lint unittest",
+    "test": "textlint-scripts test",
     "watch": "textlint-scripts build --watch",
     "format": "prettier --write \"**/*.{js,jsx,ts,tsx,css}\"",
     "prepare": "git config --local core.hooksPath .githooks"
@@ -38,16 +38,10 @@
     "node-fetch": "^2.6.0",
     "p-memoize": "^3.1.0",
     "p-queue": "^6.2.0",
-    "textlint-rule-helper": "^2.1.1"
+    "textlint-rule-helper": "^2.2.2"
   },
   "devDependencies": {
-    "eslint": "^8.25.0",
-    "eslint-config-airbnb-base": "^15.0.0",
-    "eslint-config-prettier": "^8.5.0",
-    "eslint-plugin-immutable": "^1.0.0",
-    "eslint-plugin-import": "^2.26.0",
     "lint-staged": "^13.0.3",
-    "npm-run-all": "^4.1.5",
     "prettier": "^2.7.1",
     "textlint": "^12.2.2",
     "textlint-scripts": "^12.2.2",

src/no-dead-link.js

@@ -287,7 +287,7 @@ function reporter(context, options = {}) {
             ? await isAliveLocalFile(uri)
             : await memorizedIsAliveURI(uri, method, maxRetryCount);
         const { ok, redirected, redirectTo, message } = result;
-        // When ignoreRedirects is true, redirected should be ignore
+        // When ignoreRedirects is true, redirected should be ignored
         if (redirected && ruleOptions.ignoreRedirects) {
             return;
         }
@@ -349,7 +349,26 @@ function reporter(context, options = {}) {
             });
         },
 
-        [`${context.Syntax.Document}:exit`]() {
+        // Reference links is markdown specific
+        Definition: function (node) {
+            if (!node.url) {
+                return;
+            }
+
+            // Some link text[1]
+            //
+            // [1]: https://foo.bar
+            //      ^
+            const indexOfUrl = node.raw.indexOf(node.url);
+            const index = indexOfUrl !== -1 ? indexOfUrl : 0;
+            URIs.push({
+                node,
+                uri: node.url,
+                index
+            });
+        },
+
+        [Syntax.DocumentExit]() {
             const queue = new PQueue({
                 concurrency: ruleOptions.concurrency,
                 intervalCap: ruleOptions.intervalCap,

test/no-dead-link.js

@@ -209,6 +209,18 @@ tester.run("no-dead-link", rule, {
                     column: 47
                 }
             ]
+        },
+        {
+            text: `Support Reference link[^1] in Markdown.
+
+[^1] https://httpstat.us/404`,
+            errors: [
+                {
+                    message: "https://httpstat.us/404 is dead. (404 Not Found)",
+                    line: 3,
+                    column: 6
+                }
+            ]
         }
     ]
 });