auto-package-installation.sh

#!/bin/bash -

clear
echo "This script will automate the process of installing packages."
echo "These packages are must for any debian based distro."

# Creating a log file
log="installation-log.txt"
d=`date`
echo "This log file created during installation on $d" > "$log"

# Updating all the package lists
printf "Updating all the package lists" | tee -a "$log"
apt-get update >> "$log"

# Retriving package list from https://gist.githubusercontent.com/CryptoSingh1337/d45723380f1e997d1955e983e3fde03b/raw/f30a2e692c2ac4487e5051e6e31209ee1eedf0cd/recommended-ubuntu-packages.txt
printf "Do you want to install packages that are listed in https://gist.github.com/CryptoSingh1337/d45723380f1e997d1955e983e3fde03b (y/n): " | tee -a "$log"
read -r r

# Defining the package list name
f="packages.txt"
q=0 # defining flag for encounter the condition when user choose 'y' or 'Y' then script should not accept package name from user.
if  [ ! -z $r ]; then
	if [ $r == "y" ] || [ $r == "Y" ]; then
		q=1
		printf "%s\n" "Retriving package list from https://gist.github.com/CryptoSingh1337/d45723380f1e997d1955e983e3fde03b" | tee -a "$log"
		curl -o packages.txt https://gist.githubusercontent.com/CryptoSingh1337/d45723380f1e997d1955e983e3fde03b/raw/f30a2e692c2ac4487e5051e6e31209ee1eedf0cd/recommended-ubuntu-packages.txt | tee -a "$log"
	fi
fi

if [ $q -ne 1 ]; then
	printf "Enter the name of custom package-name list (default - packages.txt): "
	read -r f
	if [ -z $f ]; then
		f="packages.txt"
	fi
fi

if [ ! -f $f ]; then
	printf "$f not exists\n" | tee -a "$log"
	exit 1
fi

# checking whether file is empty or not
if [ ! -s $f ]; then
	printf "$f is empty\n" | tee -a "$log"
	exit 1
fi

# check for specific package
# Return values:
#  0 - package is installed
#  1 - package is not installed, it is available in package repository
#  2 - package is not installed, it is not available in package repository

check_for_package() {
  	if dpkg-query -s "$1" 1>/dev/null 2>&1; then
    	return 0
  	else
    	if apt-cache show "$1" 1>/dev/null 2>&1; then
      		return 1
    	else
      		return 2
    	fi
  	fi
}

# Taking file name as input (by default file name is: packages.txt)

printf "Reading packages from %s\n" "$f" | tee -a "$log"

i=0	# installed packages
j=0	# total packages
k=0 # not installed packages
while IFS= read -r line; do
   	if check_for_package "$line"; then
   		d=`date +"%r"`
    	printf "[ %s ] %-30s - package is already installed\n" "$d" "$line" | tee -a "$log"
  	else
    	if test "$?" -eq 1; then
    		d=`date +"%r"`
    		printf "[ %s ] %-30s - installing\n" "$d" "$line" | tee -a installation-log.txt
    		# apt-get install $line >> installation-log.txt
    		if check_for_package "$line"; then
    			d=`date +%r`
				printf "[ %s ] %-30s - successfully installed\n" "$d" "$line" | tee -a "$log"
				i=$((i+1))
    		else
    			d=`date +"%r"`
				printf "[ %s ] %-30s - unable to install\n" "$d" "$line" | tee -a "$log"
    			printf "%s\n" "please check log file: installation-log.txt"
				k=$((k+1))
      		fi
    	else
    		d=`date +"%r"`
      		printf "[ %s ] %-30s - package is not installed, it is not available in package repository\n" "$d" "$line" | tee -a "$log"
			k=$((k+1))
    	fi
  	fi
	j=$((j+1))
done < $f

# Finishing the script
printf "%s packages are already installed, %s packages are installed and %s not installed\n" "$((j-i-k))" "$i" "$k" | tee -a "$log"