Redis Quickstart

redis-quickstart.sh

#!/bin/bash

echo "$(tput setaf 6)$(tput bold)○ Checking Redis...$(tput sgr0)"
# Check if Redis CLI is present
if ! [ -x "$(command -v redis-cli)" ]; then
  # If not, provide users an option to download
  echo " $(tput setaf 3)$(tput bold)• Redis is not installed or on the path$(tput sgr0)"
  read -p " Do you want to install it? $(tput dim)(Y/N)$(tput sgr 0) " prompt
  if [[ $prompt =~ [yY] ]]; then
    # Check if tools required to download and install redis are present
    if ! [ -x "$(command -v make)" -a -x "$(command -v wget)" -a -x "$(command -v tar)" ]; then
      # If not, we cannot do anything unless user installs the tools
      echo " $(tput setaf 1)$(tput bold)Please make sure you have these packages installed: make, wget, tar$(tput sgr0)"
      exit 1
    fi
    # Check if .redis directory exists, helps in resuming the installation process
    # by not downloading redis again
    if [ -e ~/.redis ]; then
      # Redis is already downloaded and present in preconfigured location
      echo " $(tput setaf 6)$(tput bold)• Picked up Redis location...$(tput sgr0)"
      # Saving current location to return to after installation
      contextdir=$(pwd)
      echo " $(tput setaf 5)$(tput bold)• Checking Redis Build Status...$(tput sgr0)"
      cd ~/.redis
      # Checking if redis is built
      if [ -e src/redis-cli -a -e src/redis-server ]; then
        echo " $(tput setaf 6)$(tput bold)• Redis is built!$(tput sgr0)"
      else
        # Build redis
        echo " $(tput setaf 5)$(tput bold)• Building Redis...$(tput sgr0)"
        make -j 4
        # Move back to the folder we came from
        cd $contextdir
      fi
    else
      # Redis folder not present, we will now download it
      echo " $(tput setaf 5)$(tput bold)• Downloading Redis...$(tput sgr0)"
      wget -c 'http://download.redis.io/redis-stable.tar.gz'
      echo " $(tput setaf 5)$(tput bold)• Unpacking Redis...$(tput sgr0)"
      tar xzf redis-stable.tar.gz
      echo " $(tput setaf 5)$(tput bold)• Building Redis...$(tput sgr0)"
      # Build redis
      cd redis-stable
      make -j 4
      cd ..
      # Move redis installation to preconfigured location
      echo " $(tput setaf 5)$(tput bold)• Moving Redis to ~/.redis...$(tput sgr0)"
      mv redis-stable ~/.redis
      echo " $(tput setaf 5)$(tput bold)• Removing Redis tar...$(tput sgr0)"
      rm redis-stable.tar.gz
    fi
    # Redis is both present and built, add to PATH
    echo " $(tput setaf 5)$(tput bold)• Adding Redis to PATH...$(tput sgr0)"
    path='export PATH=~/.redis/src:$PATH'
    echo $path >> ~/.profile
    # To allow PATH change to register in this terminal session, we source the updated profile
    source ~/.profile
    echo " $(tput setaf 2)$(tput bold)• PATH Set!$(tput sgr0)"
  else
    # User declined the download, not much we can do
    echo " $(tput setaf 1)$(tput bold)Skipping the download. Please download it yourself. Bye!$(tput sgr0)"
    exit 1
  fi
fi

# Redis is found in PATH, checking instance
echo " $(tput setaf 2)$(tput bold)• Redis found!$(tput sgr0)"
echo " $(tput setaf 6)$(tput bold)○ Checking Redis Instance...$(tput sgr0)"
if [ $(redis-cli ping) ]; then
  echo " $(tput setaf 2)$(tput bold)• Redis already running!$(tput sgr0)"
else
  echo " $(tput setaf 5)$(tput bold)• Starting Redis...$(tput sgr0)"
  redis-server &
  echo " $(tput setaf 2)$(tput bold)• Redis started - $(redis-cli ping)!$(tput sgr0)"
fi