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resume.py
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#!/usr/bin/env python3
import argparse
import base64
import itertools
import logging
import os
import shutil
import subprocess
import sys
import tempfile
import markdown
preamble = """\
<html lang="en">
<head>
<meta charset="UTF-8">
<title>{title}</title>
<style>
{css}
</style>
</head>
<body>
<div id="resume">
"""
postamble = """\
</div>
</body>
</html>
"""
CHROME_GUESSES_MACOS = (
"/Applications/Chromium.app/Contents/MacOS/Chromium",
"/Applications/Google Chrome Canary.app/Contents/MacOS/Google Chrome Canary",
"/Applications/Google Chrome.app/Contents/MacOS/Google Chrome",
)
# https://stackoverflow.com/a/40674915/409879
CHROME_GUESSES_WINDOWS = (
# Windows 10
os.path.expandvars(r"%ProgramFiles(x86)%\Google\Chrome\Application\chrome.exe"),
os.path.expandvars(r"%ProgramFiles%\Google\Chrome\Application\chrome.exe"),
os.path.expandvars(r"%LocalAppData%\Google\Chrome\Application\chrome.exe"),
# Windows 7
r"C:\Program Files (x86)\Google\Chrome\Application\chrome.exe",
r"C:\Program Files\Google\Chrome\Application\chrome.exe",
# Vista
r"C:\Users\UserName\AppDataLocal\Google\Chrome",
# XP
r"C:\Documents and Settings\UserName\Local Settings\Application Data\Google\Chrome",
)
# https://unix.stackexchange.com/a/439956/20079
CHROME_GUESSES_LINUX = [
"/".join((path, executable))
for path, executable in itertools.product(
(
"/usr/local/sbin",
"/usr/local/bin",
"/usr/sbin",
"/usr/bin",
"/sbin",
"/bin",
"/opt/google/chrome",
),
("google-chrome", "chrome", "chromium", "chromium-browser"),
)
]
def guess_chrome_path() -> str:
if sys.platform == "darwin":
guesses = CHROME_GUESSES_MACOS
elif sys.platform == "win32":
guesses = CHROME_GUESSES_WINDOWS
else:
guesses = CHROME_GUESSES_LINUX
for guess in guesses:
if os.path.exists(guess):
logging.info("Found Chrome or Chromium at " + guess)
return guess
raise ValueError("Could not find Chrome. Please set CHROME_PATH.")
def title(md: str) -> str:
"""
Return the contents of the first markdown heading in md, which we
assume to be the title of the document.
"""
for line in md.splitlines():
if line[0] == "#":
return line.strip("#").strip()
raise ValueError("Cannot find any lines that look like markdown headings")
def make_html(md: str, prefix: str = "resume") -> str:
"""
Compile md to HTML and prepend/append preamble/postamble.
Insert <prefix>.css if it exists.
"""
try:
with open(prefix + ".css") as cssfp:
css = cssfp.read()
except FileNotFoundError:
print(prefix + ".css not found. Output will by unstyled.")
css = ""
return "".join(
(
preamble.format(title=title(md), css=css),
markdown.markdown(md, extensions=["smarty"]),
postamble,
)
)
def write_pdf(html: str, prefix: str = "resume", chrome: str = "") -> None:
"""
Write html to prefix.pdf
"""
chrome = chrome or guess_chrome_path()
html64 = base64.b64encode(html.encode("utf-8"))
options = [
"--headless",
"--print-to-pdf-no-header",
"--enable-logging=stderr",
"--log-level=2",
]
# https://bugs.chromium.org/p/chromium/issues/detail?id=737678
if sys.platform == "win32":
options.append("--disable-gpu")
tmpdir = tempfile.TemporaryDirectory(prefix="resume.md_")
options.append(f"--crash-dumps-dir={tmpdir.name}")
options.append(f"--user-data-dir={tmpdir.name}")
try:
subprocess.run(
[
chrome,
*options,
f"--print-to-pdf={prefix}.pdf",
"data:text/html;base64," + html64.decode("utf-8"),
],
check=True,
)
logging.info(f"Wrote {prefix}.pdf")
except subprocess.CalledProcessError as exc:
if exc.returncode == -6:
logging.warning(
"Chrome died with <Signals.SIGABRT: 6> "
f"but you may find {prefix}.pdf was created successfully."
)
else:
raise exc
finally:
# We use this try-finally rather than TemporaryDirectory's context
# manager to be able to catch the exception caused by
# https://bugs.python.org/issue26660 on Windows
try:
shutil.rmtree(tmpdir.name)
except PermissionError as exc:
logging.warning(f"Could not delete {tmpdir.name}")
logging.info(exc)
if __name__ == "__main__":
parser = argparse.ArgumentParser()
parser.add_argument(
"file",
help="markdown input file [resume.md]",
default="resume.md",
nargs="?",
)
parser.add_argument(
"--no-html",
help="Do not write html output",
action="store_true",
)
parser.add_argument(
"--no-pdf",
help="Do not write pdf output",
action="store_true",
)
parser.add_argument(
"--chrome-path",
help="Path to Chrome or Chromium executable",
)
parser.add_argument("-q", "--quiet", action="store_true")
args = parser.parse_args()
if args.quiet:
logging.basicConfig(level=logging.WARN, format="%(message)s")
else:
logging.basicConfig(level=logging.INFO, format="%(message)s")
prefix, _ = os.path.splitext(args.file)
with open(args.file, encoding="utf-8") as mdfp:
md = mdfp.read()
html = make_html(md, prefix=prefix)
if not args.no_html:
with open(prefix + ".html", "w", encoding="utf-8") as htmlfp:
htmlfp.write(html)
logging.info(f"Wrote {htmlfp.name}")
if not args.no_pdf:
write_pdf(html, prefix=prefix, chrome=args.chrome_path)