[Docs] Enable relative links in examples to function when rendered in the docs (vllm-project#24041)

Signed-off-by: Harry Mellor <[email protected]>

Author: hmellor

docs/mkdocs/hooks/generate_examples.py

@@ -114,21 +114,50 @@ def determine_title(self) -> str:
                 return match.group('title')
         return fix_case(self.path.stem.replace("_", " ").title())
 
+    def fix_relative_links(self, content: str) -> str:
+        """
+        Fix relative links in markdown content by converting them to gh-file
+        format.
+        
+        Args:
+            content (str): The markdown content to process
+            
+        Returns:
+            str: Content with relative links converted to gh-file format
+        """
+        # Regex to match markdown links [text](relative_path)
+        # This matches links that don't start with http, https, ftp, or #
+        link_pattern = r'\[([^\]]*)\]\((?!(?:https?|ftp)://|#)([^)]+)\)'
+
+        def replace_link(match):
+            link_text = match.group(1)
+            relative_path = match.group(2)
+
+            # Make relative to repo root
+            gh_file = (self.main_file.parent / relative_path).resolve()
+            gh_file = gh_file.relative_to(ROOT_DIR)
+
+            return f'[{link_text}](gh-file:{gh_file})'
+
+        return re.sub(link_pattern, replace_link, content)
+
     def generate(self) -> str:
         content = f"# {self.title}\n\n"
         content += f"Source <gh-file:{self.path.relative_to(ROOT_DIR)}>.\n\n"
 
         # Use long code fence to avoid issues with
         # included files containing code fences too
         code_fence = "``````"
-        # Skip the title from md snippets as it's been included above
-        start_line = 2
-        if self.is_code:
-            content += f"{code_fence}{self.main_file.suffix[1:]}\n"
-            start_line = 1
-        content += f'--8<-- "{self.main_file}:{start_line}"\n'
+
         if self.is_code:
-            content += f"{code_fence}\n"
+            content += (f"{code_fence}{self.main_file.suffix[1:]}\n"
+                        f'--8<-- "{self.main_file}"\n'
+                        f"{code_fence}\n")
+        else:
+            with open(self.main_file) as f:
+                # Skip the title from md snippets as it's been included above
+                main_content = f.readlines()[1:]
+            content += self.fix_relative_links("".join(main_content))
         content += "\n"
 
         if not self.other_files: