(fix): getReferencedMarkdownFiles should ignore http/https links (#3169)

packages/cli/yaml/docs-validator/src/__test__/valid-markdown-link.test.ts

@@ -0,0 +1,49 @@
+import { AbsoluteFilePath } from "@fern-api/fs-utils";
+import { getReferencedMarkdownFiles } from "../rules/valid-markdown-link/valid-markdown-link";
+
+describe("getReferencedMarkdownFiles", () => {
+    it("should match on .md and .mdx", () => {
+        const content = `
+        [Link to a markdown file](./file1.md)
+        [Link to an mdx file](./file2.mdx)
+        `;
+
+        const links = getReferencedMarkdownFiles({
+            content,
+            absoluteFilepath: AbsoluteFilePath.of("/path/to/fern/file0.md")
+        });
+
+        expect(links).toEqual([
+            { path: "./file1.md", absolutePath: AbsoluteFilePath.of("/path/to/fern/file1.md") },
+            { path: "./file2.mdx", absolutePath: AbsoluteFilePath.of("/path/to/fern/file2.mdx") }
+        ]);
+    });
+
+    it("should not match on non-markdown files", () => {
+        const content = `
+        [Link to a non-markdown file](./file1.txt)
+        [Link to a non-markdown file](./file2.js)
+        `;
+
+        const links = getReferencedMarkdownFiles({
+            content,
+            absoluteFilepath: AbsoluteFilePath.of("/path/to/fern/file0.md")
+        });
+
+        expect(links).toEqual([]);
+    });
+
+    it("should not match on http or https links", () => {
+        const content = `
+        [Link to a http file](http://example.com/file1.md)
+        [Link to a https file](https://example.com/file2.md)
+        `;
+
+        const links = getReferencedMarkdownFiles({
+            content,
+            absoluteFilepath: AbsoluteFilePath.of("/path/to/fern/file0.md")
+        });
+
+        expect(links).toEqual([]);
+    });
+});

packages/cli/yaml/docs-validator/src/rules/valid-markdown-link/valid-markdown-link.ts

@@ -1,7 +1,7 @@
 import { AbsoluteFilePath, dirname, doesPathExist, join, RelativeFilePath } from "@fern-api/fs-utils";
 import { Rule, RuleViolation } from "../../Rule";
 
-const LINK_PATTERN = /\[([^\]]+)\]\((.*?)\)/g;
+const LINK_PATTERN = /\[([^\]]+)\]\(((?!http:\/\/|https:\/\/).*?)\)/gi;
 
 export const ValidMarkdownLinks: Rule = {
     name: "valid-markdown-links",