#!/usr/bin/env nix-shell
#!nix-shell -i bash -p curl gnused gawk nix-prefetch common-updater-scripts jq

set -euo pipefail

ROOT="$(dirname "$(readlink -f "$0")")"
NIX_DRV="$ROOT/package.nix"
if [ ! -f "$NIX_DRV" ]; then
    echo "ERROR: cannot find package.nix in $ROOT"
    exit 1
fi

fetch_arch() {
    VER="$1"
    ARCH="$2"
    URL="https://github.com/envoyproxy/envoy/releases/download/v${VER}/envoy-${VER}-linux-${ARCH}"
    nix hash convert --to sri --hash-algo sha256 "$(nix-prefetch-url --type sha256 "$URL")"
}

replace_hash() {
    sed -i "s#$1 = \"sha256-.\{44\}\"#$1 = \"$2\"#" "$NIX_DRV"
}

VER=$(list-git-tags --url=https://github.com/envoyproxy/envoy | rg 'v1\.34\.[0-9]*$' | sed -e 's/^v//' | sort -V | tail -n 1)

LINUX_X64_HASH=$(fetch_arch "$VER" "x86_64")
LINUX_AARCH64_HASH=$(fetch_arch "$VER" "aarch_64")

sed -i "s/version = \".*\"/version = \"$VER\"/" "$NIX_DRV"

replace_hash "x86_64-linux" "$LINUX_X64_HASH"
replace_hash "aarch64-linux" "$LINUX_AARCH64_HASH"
