Download luarocks dependencies for offline usage

offline-luarocks-dependencies.sh

#!/usr/bin/env bash

set -Eeuo pipefail

if [ -z "$1" ]; then
  echo "No argument supplied"
fi

DEPENDENCIES_DIR="${PWD}/luarocks-dependencies"

mkdir -p "${DEPENDENCIES_DIR}"

# Pin the dependencies
luarocks build --only-deps --pin "$1"
mv luarocks.lock "${DEPENDENCIES_DIR}"/luarocks_lock.lua

cd "${DEPENDENCIES_DIR}"
echo "Dependencies in ${DEPENDENCIES_DIR}:"

while read -r line; do
  if [ -z "$line" ]; then
    continue
  fi
  IFS=" " read -r name version <<<"$line"

  # If name is lua skip it
  if [ "$name" = "lua" ]; then
    continue
  fi
  echo "Downloading ${name} ${version}"
  if ! luarocks search "${name}" "${version}" --porcelain | cut -f1,2,3 --output-delimiter " " | grep -q -F "${name} ${version} src"; then
    luarocks download --rockspec "${name}" "${version}"
    luarocks pack "${name}-${version}.rockspec"
  else
    luarocks download --source "${name}" "${version}"
  fi
done <<<"$(lua -e "for name, version in pairs(require('luarocks_lock').dependencies) do print(name .. ' ' .. version) end")"

luarocks-admin make_manifest --local-tree "${PWD}"

cp manifest manifest-5.1
cp manifest manifest-5.2
cp manifest manifest-5.4

# luarocks install --only-deps <name>.rockspec --only-server ./luarocks-dependencies