pac-installed

#!/bin/bash

### This script lists the log messages for recently explicitly installed pacman packages

final_logs=90				# Configure total number of messages displayed in total
initial_logs=$(($final_logs * 2)) 	# Extra logs as some are for dependency (non-explicit) packages 

# create array of 
# most recent pacman log messages that include "installed" (or "reinstalled")
mapfile -t log_messages < <(grep installed /var/log/pacman.log | tail -n $initial_logs)

# create array of 
# currently, explicitly installed packages from pacman, with --quiet option to exclude version
mapfile -t package_list < <(pacman -Qeq)

# iterate through the pacman log messages
for msg in "${log_messages[@]}"
do
	# only echo the log message if it involves a currently, explicitly installed package 
	for pkg in "${package_list[@]}"	
	do
		if [[ "$msg" =~ "$pkg" ]]	# if message string includes package
		then echo "$msg"; break		# then echo the message
		fi
	done
done \
| tail -n $final_logs \
| grep installed --color=always