update-katex-version.sh

#!/bin/bash

NEW_VERSION=$(curl -s 'https://registry.npmjs.org/katex' | jq '.["dist-tags"]["latest"]')
CURRENT_VERSION=$(awk '/katex_version =/{print $3}' sphinxcontrib/katex.py)

# Remove "" and '' around version
NEW_VERSION=${NEW_VERSION//\"/}
CURRENT_VERSION=${CURRENT_VERSION//\'/}

echo "Current KaTeX version: ${CURRENT_VERSION}"
echo "New KaTeX version: ${NEW_VERSION}"

# Function to compare version numbers,
# https://www.baeldung.com/linux/compare-dot-separated-version-string
function version { printf "%03d%03d%03d" $(echo "$1" | tr '.' ' '); }

if [ $(version ${NEW_VERSION}) -lt $(version ${CURRENT_VERSION}) ]; then
    echo "Something went wrong as current version is newer"
    exit 1
fi

if [ $(version ${NEW_VERSION}) -eq $(version ${CURRENT_VERSION}) ]; then
    echo "Versions are the same."
    exit 0
fi

KATEX_URL="https://cdn.jsdelivr.net/npm/katex@${NEW_VERSION}/dist"

# Download JS files
echo "Updating katex.min.js"
curl -s ${KATEX_URL}/katex.min.js --output sphinxcontrib/katex.min.js
echo "Updating auto-render.min.js"
curl -s ${KATEX_URL}/contrib/auto-render.min.js --output sphinxcontrib/auto-render.min.js

# Update Python file
echo "Updating katex.py"
sed -i "/katex_version = '${CURRENT_VERSION}'/c\\katex_version = '${NEW_VERSION}'" sphinxcontrib/katex.py

# Update README
echo "Updating README.rst"
sed -i "s/${CURRENT_VERSION}/${NEW_VERSION}/" README.rst

# Update Read The Docs configuration
echo "Updating .readthedocs.yaml"
sed -i "s/katex@${CURRENT_VERSION}/katex@${NEW_VERSION}/" .readthedocs.yaml