Bash script file for updating phpMyAdmin

pma-update.sh

#!/bin/bash
# <Config>
backuppath="/path/to/backups"
pmapath="/path/to/phpMyAdmin"
# </Config>

# Colors
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
RESET='\033[0m'

echo "phpMyAdmin updater sh script - by @DJDavid98"

# Check paths
if ! [ -d "${backuppath}" ]; then
  echo -e "${RED}Backup path is not a folder${RESET}";
  exit 1;
fi
if ! [ -d "${pmapath}" ]; then
  echo -e "${RED}phpMyAdmin path is not a folder${RESET}";
  exit 1;
fi

# Check if first command line parameter is empty
if [ -z "$1" ]
  then
    # If yes, try getting latest version
    echo -e "${YELLOW}ZIP file URL missing, looking for latest version...${RESET}"
    url=$(curl -sL https://www.phpmyadmin.net/downloads/ | grep -Po '(?<=href=")https://files\.phpmyadmin\.net/phpMyAdmin/[\d\.]+/phpMyAdmin-[\d\.]+-english\.zip(?=")' -m 1)
    if [ -z "$url" ]
      then
        echo -e "${RED}Couldn't find latest version${RESET}"
        exit 1
      else
        echo -e "${GREEN}Found latest version${RESET}"
    fi
  else
    # otherwise, use speciied URL
    url=$1
fi

# Check if URL appears to be vaid
if ! [[ "$url" =~ ^https://files\.phpmyadmin\.net/phpMyAdmin/[0-9\.]+/phpMyAdmin-[0-9\.]+-(english|all-languages)\.zip$ ]];
  then
    echo -e "${RED}Invalid ZIP file URL${RESET}"
    exit 1
fi

# Go to phpMyAdmin folder
cd ${pmapath}

# Backup user configuration
if [ -f config.inc.php ];
  then
    echo "Backing up configuration..."
    cp config.inc.php ${backuppath}/config.inc.php
fi

# Get ZIP file
echo "Downloading ZIP file..."
wget -O ${backuppath}/_pma.zip ${url}
if [ ! -f "${backuppath}/_pma.zip" ]
  then
    echo -e "${RED}File download failed, aborting${RESET}"
    exit 1
fi

# Empty folder and decompress ZIP
echo "Emptying folder..."
rm -R *
echo "Decompressing ZIP file..."
unzip -o ${backuppath}/_pma.zip -d . > /dev/null
rm ${backuppath}/_pma.zip
mv * _tmp
if [ -d "_tmp" ]; then
  mv _tmp/* .
  rm -R _tmp > /dev/null
fi

# Restore backed up configuration, if any
if [ -f "${backuppath}/config.inc.php" ];
  then
    echo "Restoring configuration..."
    cp ${backuppath}/config.inc.php config.inc.php
fi

# Finish
echo -e "${GREEN}phpMyAdmin updated${RESET}"