, and tags; the footer.
+"""
+
+# importing required libraries
+import sys
+import re
+import html
+
+# A dictionary that maps regex to match at the beginning of gmi lines
+# to their corresponding HTML tag names. Used by
+# convert_single_line().
+tags_dict = {
+ r"^# (.*)": "h1",
+ r"^## (.*)": "h2",
+ r"^### (.*)": "h3",
+ r"^\* (.*)": "li",
+ r"^> (.*)": "blockquote",
+ r"^=>\s*(\S+)(\s+.*)?": "a"
+}
+
+
+# This function takes a string of gemtext as input and returns a
+# string of HTML
+def convert_single_line(gmi_line):
+ for pattern in tags_dict.keys():
+ match = re.match(pattern, gmi_line)
+ if match:
+ tag = tags_dict[pattern]
+ groups = match.groups()
+ if tag == "a":
+ href = re.sub("^gemini://", "https://", groups[0])
+ href = re.sub(r"\.gmi$", ".html", href)
+ if len(groups) > 1 and groups[1] is not None:
+ inner_text = groups[1].strip()
+ else:
+ inner_text = href
+ return f"<{tag} href='{href}'>{inner_text}
"
+ else:
+ inner_text = html.escape(groups[0].strip())
+ return f"<{tag}>{inner_text}"
+ gmi_line = html.escape(gmi_line)
+ return f"{gmi_line}
"
+
+
+# Reads the contents of the input file line by line and outputs HTML.
+# Renders text in preformat blocks (toggled by ```) as multiline
+# tags.
+def main(args):
+ with open(args[3]) as gmi, open(args[4], "w") as output:
+ # Write header
+ header = open(args[1])
+ output.write(header.read())
+ header.close()
+ # Parse gmitext
+ pre = False
+ listing = False
+ for line in gmi:
+ if line.startswith("```"):
+ pre = not pre
+ if pre:
+ line = line.rstrip()
+ if len(line) > 3:
+ line = html.escape(line[3:])
+ output.write(f"\n")
+ else:
+ output.write("\n")
+ else:
+ output.write("\n")
+ elif pre:
+ output.write(html.escape(line))
+ else:
+ line = line.rstrip()
+ if line.startswith("*") and not listing:
+ listing = True
+ output.write("\n")
+ if not line.startswith("*") and listing:
+ listing = False
+ output.write("
\n")
+ output_line = convert_single_line(line)
+ output.write(output_line+"\n")
+ # Write footer
+ footer = open(args[2])
+ output.write(footer.read())
+ footer.close()
+
+# Main guard
+if __name__ == "__main__":
+ main(sys.argv)
--
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