Remove latex cog and matplotlib

matplotlib, and its sub dependencies, caused a fresh install of an environment to take multiple minutes. As the latex cog is the only one that used it, and that is currently disabled, we have decided to remove it entirely.

Git gives us the benefit of being able to see deleted files. So whoever decides to implement latex again can use that for reference.

1 files changed, 0 insertions, 101 deletions

diff --git a/bot/exts/utilities/latex.py b/bot/exts/utilities/latex.py
deleted file mode 100644
index 36c7e0ab..00000000
--- a/bot/exts/utilities/latex.py
+++ /dev/null
@@ -1,101 +0,0 @@
-import asyncio
-import hashlib
-import pathlib
-import re
-from concurrent.futures import ThreadPoolExecutor
-from io import BytesIO
-
-import discord
-import matplotlib.pyplot as plt
-from discord.ext import commands
-
-from bot.bot import Bot
-
-# configure fonts and colors for matplotlib
-plt.rcParams.update(
-    {
-        "font.size": 16,
-        "mathtext.fontset": "cm",  # Computer Modern font set
-        "mathtext.rm": "serif",
-        "figure.facecolor": "36393F",  # matches Discord's dark mode background color
-        "text.color": "white",
-    }
-)
-
-FORMATTED_CODE_REGEX = re.compile(
-    r"(?P<delim>(?P<block>```)|``?)"        # code delimiter: 1-3 backticks; (?P=block) only matches if it's a block
-    r"(?(block)(?:(?P<lang>[a-z]+)\n)?)"    # if we're in a block, match optional language (only letters plus newline)
-    r"(?:[ \t]*\n)*"                        # any blank (empty or tabs/spaces only) lines before the code
-    r"(?P<code>.*?)"                        # extract all code inside the markup
-    r"\s*"                                  # any more whitespace before the end of the code markup
-    r"(?P=delim)",                          # match the exact same delimiter from the start again
-    re.DOTALL | re.IGNORECASE,              # "." also matches newlines, case insensitive
-)
-
-CACHE_DIRECTORY = pathlib.Path("_latex_cache")
-CACHE_DIRECTORY.mkdir(exist_ok=True)
-
-
-class Latex(commands.Cog):
-    """Renders latex."""
-
-    @staticmethod
-    def _render(text: str, filepath: pathlib.Path) -> BytesIO:
-        """
-        Return the rendered image if latex compiles without errors, otherwise raise a BadArgument Exception.
-
-        Saves rendered image to cache.
-        """
-        fig = plt.figure()
-        rendered_image = BytesIO()
-        fig.text(0, 1, text, horizontalalignment="left", verticalalignment="top")
-
-        try:
-            plt.savefig(rendered_image, bbox_inches="tight", dpi=600)
-        except ValueError as e:
-            raise commands.BadArgument(str(e))
-
-        rendered_image.seek(0)
-
-        with open(filepath, "wb") as f:
-            f.write(rendered_image.getbuffer())
-
-        return rendered_image
-
-    @staticmethod
-    def _prepare_input(text: str) -> str:
-        text = text.replace(r"\\", "$\n$")  # matplotlib uses \n for newlines, not \\
-
-        if match := FORMATTED_CODE_REGEX.match(text):
-            return match.group("code")
-        else:
-            return text
-
-    @commands.command()
-    @commands.max_concurrency(1, commands.BucketType.guild, wait=True)
-    async def latex(self, ctx: commands.Context, *, text: str) -> None:
-        """Renders the text in latex and sends the image."""
-        text = self._prepare_input(text)
-        query_hash = hashlib.md5(text.encode()).hexdigest()
-        image_path = CACHE_DIRECTORY.joinpath(f"{query_hash}.png")
-        async with ctx.typing():
-            if image_path.exists():
-                await ctx.send(file=discord.File(image_path))
-                return
-
-            with ThreadPoolExecutor() as pool:
-                image = await asyncio.get_running_loop().run_in_executor(
-                    pool, self._render, text, image_path
-                )
-
-            await ctx.send(file=discord.File(image, "latex.png"))
-
-
-def setup(bot: Bot) -> None:
-    """Load the Latex Cog."""
-    # As we have resource issues on this cog,
-    # we have it currently disabled while we fix it.
-    import logging
-    logging.info("Latex cog is currently disabled. It won't be loaded.")
-    return
-    bot.add_cog(Latex())