nerd-fonts/bin/scripts/update-gitignore.sh

#!/usr/bin/env bash
# Nerd Fonts Version: 3.1.1
# Script Version: 1.0.0
#
# Edits the repo's .gitignore to prevent patched font artifacts
# to be included, if that font is set to be not repo-released.
# to be included, if that font is set to be not repo-released.
#
# Example run
#   update-gitignore.sh

# set -x
set -e

# Get script directory to set source and target dirs relative to it
sd="$( cd -- "$(dirname "$0")" >/dev/null 2>&1 || exit ; pwd -P )"
repo_root_dir=$(dirname "$(dirname "${sd}")") # two levels up (i.e. ../../)

gitignore=${repo_root_dir}/.gitignore
gitignore_tmp=${gitignore}~

delimiter="# AUTOGENERATED"

num_comments=$(grep -c "^${delimiter}" "${gitignore}")
if [ "${num_comments}" -ne 2 ]; then
    echo "Fatal: Unexpected number of delimiting lines in gitignore file"
    exit 1
fi
if [ -f "${gitignore_tmp}" ]; then
    echo "Fatal: Temporary file ${gitignore_tmp} already exists"
    exit 1
fi

while IFS=$'\n' read -r line; do
    if [[ "${line}" =~ ^"${delimiter}" ]]; then
        if [ -z "${remove}" ]; then
            remove=1
        else
            unset remove
        fi
        continue
    fi
    if [ -z "${remove}" ]; then
        printf '%s\n' "$line" >> "${gitignore_tmp}"
    fi
done < "$gitignore"

i=0
{
    echo "${delimiter} lines follow, do not change or remove the comments"
    echo "# Non-Repo-Released fonts, see fonts.json:"
    while IFS=$'\n' read -r dir; do
        echo "patched-fonts/${dir// /\\ }/*"
        echo "!patched-fonts/${dir// /\\ }/README.md"
        i=$((i + 1))
    done < <(jq -r '.fonts[] | select(.repoRelease == false) | .folderName' lib/fonts.json)
    echo "${delimiter} lines end"
} >> "${gitignore_tmp}"

echo "Created entries for ${i} fonts in ${gitignore_tmp}"
mv -v -- "${gitignore_tmp}" "${gitignore}"