ui: render markdown in release notes (#22754)

* convert release notes from markdown to html

* fall back to previous behavior if utf8 decoding or markdown parsing throws

* make simple markdown parser to avoid needing a library

* add unit test

* move markdown parser to common. add unit test

use `markdown-it-py` instead of `markdown` dependency for test comparison since it's already in Pipfile.lock

* test (almost) all release notes and add some extra html encoding

* update lock

Co-authored-by: Willem Melching <willem.melching@gmail.com>

Pipfile

@@ -42,6 +42,7 @@ jupyterlab = "*"
 jupyterlab-vim = "*"
 keras_applications = "*"
 lru-dict = "*"
+markdown-it-py = "*"
 matplotlib = "*"
 mock = "*"
 mpld3 = "*"

Pipfile.lock

@@ -1,7 +1,7 @@
 {
     "_meta": {
         "hash": {
-            "sha256": "7d947b4ec704dbcb974423ac826df3222d956ffd608b989a3ab607e8d25df484"
+            "sha256": "bda9b34e8525624fd39ac3a78476942df82d79dd1e06555cbd1e38a6c8574976"
         },
         "pipfile-spec": 6,
         "requires": {
@@ -2287,7 +2287,7 @@
                 "sha256:36be6bb3ad987bfdb839f5ba78ddf094552ca38ccbd784ae4f74a4e1419fc6e3",
                 "sha256:98080fc0bc34c4f2bcf0846a096a9429acbd9d5d8e67ed34026c03c61c464389"
             ],
-            "markers": "python_version ~= '3.6'",
+            "index": "pypi",
             "version": "==1.1.0"
         },
         "markupsafe": {

common/markdown.py

@@ -0,0 +1,48 @@
+from typing import List
+
+HTML_REPLACEMENTS = [
+  (r'&', r'&'),
+  (r'"', r'"'),
+]
+
+
+def parse_markdown(text: str, tab_length: int = 2) -> str:
+  lines = text.split("\n")
+  output: List[str] = []
+  list_level = 0
+
+  def end_outstanding_lists(level: int, end_level: int) -> int:
+    while level > end_level:
+      level -= 1
+      output.append("</ul>")
+      if level > 0:
+        output.append("</li>")
+    return end_level
+
+  for i, line in enumerate(lines):
+    if i + 1 < len(lines) and lines[i + 1].startswith("==="):  # heading
+      output.append(f"<h1>{line}</h1>")
+    elif line.startswith("==="):
+      pass
+    elif line.lstrip().startswith("* "):  # list
+      line_level = 1 + line.count(" " * tab_length, 0, line.index("*"))
+      if list_level >= line_level:
+        list_level = end_outstanding_lists(list_level, line_level)
+      else:
+        list_level += 1
+        if list_level > 1:
+          output[-1] = output[-1].replace("</li>", "")
+        output.append("<ul>")
+      output.append(f"<li>{line.replace('*', '', 1).lstrip()}</li>")
+    else:
+      list_level = end_outstanding_lists(list_level, 0)
+      if len(line) > 0:
+        output.append(line)
+
+  end_outstanding_lists(list_level, 0)
+  output_str = "\n".join(output) + "\n"
+
+  for (fr, to) in HTML_REPLACEMENTS:
+    output_str = output_str.replace(fr, to)
+
+  return output_str

common/tests/test_markdown.py

@@ -0,0 +1,26 @@
+#!/usr/bin/env python3
+from markdown_it import MarkdownIt
+import os
+import unittest
+
+from common.basedir import BASEDIR
+from common.markdown import parse_markdown
+
+
+class TestMarkdown(unittest.TestCase):
+  # validate that our simple markdown parser produces the same output as `markdown_it` from pip
+  def test_current_release_notes(self):
+    self.maxDiff = None
+
+    with open(os.path.join(BASEDIR, "RELEASES.md")) as f:
+      for r in f.read().split("\n\n"):
+
+        # No hyperlink support is ok
+        if '[' in r:
+          continue
+
+        self.assertEqual(MarkdownIt().render(r), parse_markdown(r))
+
+
+if __name__ == "__main__":
+  unittest.main()

selfdrive/test/test_updated.py

@@ -53,7 +53,7 @@ class TestUpdated(unittest.TestCase):
       f"cd {self.basedir} && scons -j{os.cpu_count()} cereal/ common/"
     ])
 
-    self.params = Params(db=os.path.join(self.basedir, "persist/params"))
+    self.params = Params(os.path.join(self.basedir, "persist/params"))
     self.params.clear_all()
     os.sync()
 

selfdrive/updated.py

@@ -35,6 +35,7 @@ from pathlib import Path
 from typing import List, Tuple, Optional
 
 from common.basedir import BASEDIR
+from common.markdown import parse_markdown
 from common.params import Params
 from selfdrive.hardware import EON, TICI, HARDWARE
 from selfdrive.swaglog import cloudlog
@@ -113,8 +114,10 @@ def set_params(new_version: bool, failed_count: int, exception: Optional[str]) -
   if new_version:
     try:
       with open(os.path.join(FINALIZED, "RELEASES.md"), "rb") as f:
-        r = f.read()
-      r = r[:r.find(b'\n\n')]  # Slice latest release notes
+        r = f.read().split(b'\n\n', 1)[0]  # Slice latest release notes
+      try:
+        params.put("ReleaseNotes", parse_markdown(r.decode("utf-8")))
+      except Exception:
         params.put("ReleaseNotes", r + b"\n")
     except Exception:
       params.put("ReleaseNotes", "")