Installer for PiCrate on Manjaro ARM

manjaro_install.sh

#!/usr/bin/env bash
# Bash Script to install PiCrate and dependencies on Manjaro Arm
# anticipating JRuby-9.3.0.0 which will match MRI ruby-2.6
MRI_RUBY="2.6.0"
GEM_RC="${HOME}/.gemrc"
GEM="${HOME}/.gem/ruby/${MRI_RUBY}"

function gem_rc {
  if [[ (-f ${GEM_RC}) ]]
  then
    cat "$GEM_RC"
  else
    touch "$GEM_RC"
    echo "---" >> "$GEM_RC"
    echo "gem: \"--no-document\"" >> "$GEM_RC"
  fi
}

gem_rc

function install_java {
  if [ -x "$(command -v java)" ]
    then
      java -version
  else
    sudo pacman -S jdk-openjdk
    echo "Installed OpenJDK"
  fi
}

install_java

function java_home {
  if [[ (-n ${JAVA_HOME}) ]]
  then
    echo "${JAVA_HOME}"
  else
    sudo touch "$JDK_PROFILE"
    echo "${JDK_STRING}" | sudo tee -a "${JDK_PROFILE}"
  fi
}

function install_jruby {
  if [ -x "$(command -v jruby)" ]
  then
      jruby --version
  else
  sudo pacman -S jruby
  echo "Installed JRuby"
  fi
}

install_jruby

function create_gem_home {
  if [[ (-n ${GEM_HOME}) ]]
  then
    echo "GEM_HOME=${GEM_HOME}"
  else
    mkdir -p "${GEM}"
    commands=(
    "GEM_HOME=${GEM}"
    "GEM_PATH=${GEM}"
    "PATH=\"\${GEM_PATH}/bin:\${PATH}\""
    )
    for cmd in "${commands[@]}"
    do
      echo "export ${cmd}" >> ~/.bashrc
    done
  fi
}

create_gem_home

function install_picrate {
  export GEM_HOME="${GEM}"
  export PATH="${GEM}"/bin:"${PATH}"
  jgem install picrate
}

install_picrate

function install_geany {
    if [ -x "$(command -v geany)" ]
    then
      geany --version
  else
    sudo pacman -S geany
    echo "Installed geany"
  fi
}

install_geany