Umineko Project installer for macOS/Linux

umineko_installer.sh

#!/usr/bin/env bash
#
# Umineko Project installer for macOS/Linux
#
# note1: "7z" cli tool is required (on mac, install with: `brew install p7zip`)
# note2: all 7z files (.001, .002, etc.) must be in the current folder
#

if [[ $# -eq 0 ]]; then
  echo "usage: umineko_installer extraction_password [install_path]"
  exit 1
fi

extraction_password="$1"
echo "info: using extraction password '$extraction_password'"

install_path=$(pwd)
if [[ ! -z $2 ]]; then
  install_path="$2"
fi
echo "info: installing game to $install_path"

files=(
  "umiproj_31.12.19.7z.001"
  "extra_31.12.19.7z"
  "umineko-main-scripts_r3520.zip"
)

mkdir -p "$install_path"

for file in "${files[@]}"
do
  if [ ! -e "$file" ]; then
    echo "warning: file '$file' does not exist"
    continue
  fi

  echo "extracting $file..."
  7z x $file -p"$extraction_password" -o"$install_path" -y
done

There might be problems with installation. Umineko project no longer contains these files:
extra_31.12.19.7z
umineko-main-scripts_r3520.zip

Files has been updated so it's necessary to rename them to match script names or to update script