1#!/usr/bin/env python3
2
3import subprocess
4import sys
5import shutil
6import os
7
8if len(sys.argv) < 2:
9    print("Must pass a filename argument")
10    sys.exit(1)
11
12in_filename = sys.argv[1]
13out_filename = in_filename.replace(".in.md", ".md")
14out_dir = in_filename.replace(".in.md", "")
15
16if in_filename == out_filename:
17    print("File must end in .in.md")
18    sys.exit(1)
19
20if os.path.isdir(out_dir):
21    shutil.rmtree(out_dir)
22
23os.mkdir(out_dir)
24file_num = 1
25
26with open(out_filename, "wb") as out_file, open(in_filename, "rb") as in_file:
27    for line in in_file:
28        if line.startswith(b"```dot"):
29            dot_lines = []
30            while True:
31                dot_line = next(in_file)
32                if dot_line == b"```\n":
33                    break
34                dot_lines.append(dot_line)
35            dot_input = b"".join(dot_lines)
36            svg_filename = out_dir + "/" + str(file_num) + ".svg"
37            svg = subprocess.check_output(['dot', '-Tsvg', '-o', svg_filename], input=dot_input)
38            out_file.write(b"<div align=center>\n")
39            out_file.write(b"<img src='%s'/>\n" % (svg_filename.encode('utf-8')))
40            out_file.write(b"</div>\n")
41            file_num += 1
42        else:
43            out_file.write(line)
44