markdown_to_htmlをsubtree merge

.gitmodules

@@ -1,6 +1,3 @@
-[submodule "markdown_to_html"]
-	path = markdown_to_html
-	url = https://github.com/cpprefjp/markdown_to_html.git
 [submodule "crsearch"]
 	path = crsearch
 	url = git@github.com:cpprefjp/crsearch.git

markdown_to_html/.gitignore

@@ -0,0 +1 @@
+*.pyc

markdown_to_html/commit.py

@@ -0,0 +1,61 @@
+# -*- coding: utf-8 -*-
+"""
+コミット構文
+=========================================
+
+コミットIDをリンクに変換する
+[commit REPOSITORY_NAME, commit-id0, commit-id-2...]
+
+    >>> text = "[commit REPOSITORY_NAME, 1234567, abcdefg]"
+    >>> md = markdown.Markdown(['commit'])
+    >>> print md.convert(text)
+    <a href="https://github.com/REPOSITORY_NAME/commit/1234567">1234567</a> <a href="https://github.com/REPOSITORY_NAME/commit/abcdefg">abcdefg</a>
+"""
+
+import re
+
+from markdown.extensions import Extension
+from markdown.preprocessors import Preprocessor
+
+
+def replace_commit_line(line: str) -> str:
+    new_line: str = line
+    for m in re.finditer(r'\[commit (.*?)\]', line.strip()):
+        c = m[1].split(", ")
+        repo = c[0]
+        links: list[str] = []
+        for id in c[1:]:
+            id = id.strip()
+            if len(id) == 0:
+                continue
+            links.append("<a href=\"https://github.com/{0}/commit/{1}\">{1}</a>".format(repo, id))
+        commits: str = " ".join(links)
+        new_line = new_line.replace(m[0], commits)
+    return new_line
+
+class CommitExtension(Extension):
+
+    def extendMarkdown(self, md):
+        pre = CommitPreprocessor(md)
+
+        md.registerExtension(self)
+        md.preprocessors.register(pre, 'commit', 25)
+
+
+class CommitPreprocessor(Preprocessor):
+
+    def __init__(self, md):
+        Preprocessor.__init__(self, md)
+
+    def run(self, lines):
+        new_lines = []
+
+        for line in lines:
+            new_line = replace_commit_line(line)
+            new_lines.append(new_line)
+
+        return new_lines
+
+
+def makeExtension(**kwargs):
+    return CommitExtension(**kwargs)