Fix index out of bounds

python-markdown-extension/src/python_markdown_document_offsets_injection_extension/extension.py

@@ -236,6 +236,9 @@ def run(self, parent: etree.Element, blocks: list[str]) -> bool:
             # append MARK_PREVENT_RECURSION to tail of the block to prevent recursion, we don't use a handled
             # flaglist because we don't know if there's some same block in the document
             self.parser.parseBlocks(parent, [block + MARK_PREVENT_RECURSION])
+            # fix offset index out of range
+            if len(parent) == 0:
+                return True
             # fix multi blocks in same parents
             if self.meta["last_parent"] == parent[-1]:
                 parent[-1].set("data-original-document-end", str(end))

python-markdown-extension/test/cli.py

@@ -0,0 +1,77 @@
+import argparse
+from argparse import FileType
+import markdown
+
+from pymdownx.emoji import to_svg
+from pymdownx.slugs import uslugify
+from pymdownx.arithmatex import fence_mathjax_format
+
+parser = argparse.ArgumentParser("cli")
+parser.add_argument(
+    "file", help="Markdown file to be rendered", type=FileType(encoding="utf-8")
+)
+args = parser.parse_args()
+
+result = markdown.markdown(
+    args.file.read(),
+    extensions=[
+        "document-offsets-injection",
+        "admonition",
+        "def_list",
+        "footnotes",
+        "meta",
+        "toc",
+        "pymdownx.arithmatex",
+        "pymdownx.caret",
+        "pymdownx.critic",
+        "pymdownx.details",
+        "pymdownx.emoji",
+        "pymdownx.highlight",
+        "pymdownx.inlinehilite",
+        "pymdownx.keys",
+        "pymdownx.magiclink",
+        "pymdownx.mark",
+        "pymdownx.snippets",
+        "pymdownx.progressbar",
+        "pymdownx.smartsymbols",
+        "pymdownx.superfences",
+        "pymdownx.tasklist",
+        "pymdownx.tilde",
+        "pymdownx.tabbed",
+    ],
+    extension_configs={
+        "toc": {
+            "permalink": "",
+            "slugify": uslugify,
+        },
+        "pymdownx.arithmatex": {
+            "generic": True,
+        },
+        "pymdownx.emoji": {
+            "emoji_generator": to_svg,
+        },
+        "pymdownx.highlight": {
+            "linenums": True,
+        },
+        "pymdownx.snippets": {
+            "check_paths": True,
+        },
+        "pymdownx.superfences": {
+            "custom_fences": [
+                {
+                    "name": "math",
+                    "class": "arithmatex",
+                    "format": fence_mathjax_format,
+                },
+            ],
+        },
+        "pymdownx.tasklist": {
+            "custom_checkbox": True,
+        },
+        "pymdownx.tabbed": {
+            "alternate_style": True,
+        },
+    },
+)
+
+print(result)