tex4ht.py

import pathlib
import sys
import tempfile
import re
import subprocess
import shutil
import css_inline

if len(sys.argv) < 3:
    print("Usage: tex4ht.py [in_file] [template_file] [out_file]")
    exit(1)

in_file = pathlib.Path(sys.argv[1])
template_file = pathlib.Path(sys.argv[2])
out_file = pathlib.Path(sys.argv[3])

if out_file.exists():
    exit(0)

with tempfile.TemporaryDirectory(prefix="tex4ht") as work_dir:
    work_dir = pathlib.Path(work_dir)

    with in_file.open() as f:
        input_tex = f.read()

    with template_file.open() as f:
        template_str = f.read()
        template_str = re.sub(r"\${{\s*\.Equation\s*}}\$", "[[REPLACE]]", template_str)
        template_str = template_str.replace("[[REPLACE]]", input_tex)
        template_str = template_str.replace(r"\strut{}", "")

    with (work_dir / "in.tex").open("w") as f:
        f.write(template_str)

    with (work_dir / "conf.cfg").open("w") as f:
        f.write(r"""\Preamble{xhtml}
\Configure{Gin-dim}{}
\Css{img {
    max-width: 100\%;
    height: auto;
}}
\begin{document}
\EndPreamble
""")

    subprocess.run(
        [
            "/sbin/docker",
            "run",
            "--rm",
            "-v",
            f"{work_dir}:/workdir",
            "danteev/texlive",
            "/usr/bin/make4ht",
            "-x",
            "-c",
            "conf",
            "in.tex",
            "mathml",
        ],
        check=True,
        cwd=work_dir,
    )
    html_file = work_dir / "in.html"

    inliner = css_inline.CSSInliner(base_url="file://" + str(html_file.absolute()))
    with html_file.open() as f:
        inlined = inliner.inline(f.read())

    inlined = re.sub(r'class="[^"]*"', "", inlined)
    m = re.search(r"<body[^>]*>(.*)</body>", inlined, re.DOTALL)
    with out_file.open("w") as f:
        f.write(m.group(1).strip())