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#!/usr/bin/env python3
# Copyright 2020 Louis Paternault
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <https://www.gnu.org/licenses/>.
"""Compile a `.tex` file, executing commands that are set inside the file itself."""
import argparse
import logging
import os
import pathlib
import re
import subprocess
import sys
NAME = "SpiX"
VERSION = "1.1.0"
RE_EMPTY = re.compile("^ *$")
RE_COMMENT = re.compile("^ *%")
RE_COMMAND = re.compile(r"^%\$ ?(.*)$")
class SpixError(Exception):
"""Exception that should be catched and nicely displayed to user."""
def parse_lines(lines):
"""Parse line to find code snippets.
:param iterable lines: Lines to parte (typically ``open("foo.tex").readlines()``.
:return: Iterator over snippets (as strings).
"""
snippet = None
for line in lines:
line = line.rstrip("\n")
if RE_COMMAND.match(line):
match = RE_COMMAND.match(line)
if snippet is None:
snippet = ""
else:
snippet += "\n"
snippet += match.groups()[0]
elif RE_EMPTY.match(line) or RE_COMMENT.match(line):
if snippet is not None:
yield snippet
snippet = None
else:
break
if snippet is not None:
yield snippet
def compiletex(filename, *, dryrun=False):
"""Read commands from file, and execute them.
:param str filename: File to process.
:param bool dryrun: If ``True``, print commands to run, but do not execute them.
"""
env = os.environ
filename = pathlib.Path(filename)
env["texname"] = filename.name
env["basename"] = filename.stem
try:
with open(filename, errors="ignore") as file:
for snippet in parse_lines(file.readlines()):
print(snippet)
if dryrun:
continue
subprocess.check_call(
["sh", "-c", snippet, NAME, filename.name],
cwd=(pathlib.Path.cwd() / filename).parent,
env=env,
)
except subprocess.CalledProcessError:
raise SpixError()
except IsADirectoryError as error:
raise SpixError(str(error))
def commandline_parser():
"""Return a command line parser.
:rtype: argparse.ArgumentParser
"""
parser = argparse.ArgumentParser(
prog="spix",
description=(
"Compile a `.tex` file, "
"executing commands that are set inside the file itself."
),
)
parser.add_argument(
"-n",
"--dry-run",
action="store_true",
help="Print the commands that would be executed, but do not execute them.",
)
parser.add_argument(
"--version",
help="Show version and exit.",
action="version",
version=f"{NAME} {VERSION}",
)
parser.add_argument("FILE", nargs=1, help="File to process.")
return parser
def main():
"""Main function."""
arguments = commandline_parser().parse_args()
if os.path.exists(arguments.FILE[0]):
arguments.FILE = arguments.FILE[0]
elif os.path.exists(f"{arguments.FILE[0]}.tex"):
arguments.FILE = f"{arguments.FILE[0]}.tex"
else:
logging.error("""File not found: "%s".""", arguments.FILE[0])
sys.exit(1)
try:
compiletex(arguments.FILE, dryrun=arguments.dry_run)
except SpixError as error:
if str(error):
logging.error(error)
sys.exit(1)
if __name__ == "__main__":
main()
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