#! /usr/bin/env nix-shell
#! nix-shell -i bash -p curl jq

set -e

release=$(curl -s https://api.github.com/repos/be5invis/Iosevka/releases/latest)

oldVersion=$(nix-instantiate --eval -E 'with import ./. {}; lib.getVersion iosevka-bin' | tr -d '"')
version=$(echo "$release" | jq -r .tag_name | tr -d v)

if test "$oldVersion" = "$version"; then
	echo "New version same as old version, nothing to do." >&2
	exit 0
fi

file=$(nix-instantiate --eval -A iosevka-bin.meta.position | sed -r 's/^"(.*):[0-9]+"$/\1/')
sed -i "s/$oldVersion/$version/" "$file"

{
	echo '# This file was autogenerated. DO NOT EDIT!'
	echo '{'
	for asset in $(echo "$release" | jq -r '.assets[].name | select(startswith("ttc"))'); do
		printf '  %s = "%s";\n' \
			$(echo "$asset" | sed -r "s/^ttc-(.*)-$version.zip$/\1/") \
			$(nix-prefetch-url "https://github.com/be5invis/Iosevka/releases/download/v$version/$asset")
	done
	echo '}'
} >$(dirname "$file")/variants.nix