Jakpak - compare your local packages with ARM packages.

Question

I have decided to write this script for myself after I have recently upgraded my system and (foolishly) removed pacman.log in the meantime. The system crashed and I had no real idea which package upgrade might have been the cause. Thus, this software.
The main idea is to allow the user to quickly check what changes were made to local packages since a given day. Usage:
jakpak -d 05-07-2014 -r core
will provide the user with the list of packages (with their respective versions) that differ between the local system and the particular date specified by the user.
Apparently, the code needs some tuning, therefore if anyone would be interested in using this piece of software, this will follow up in due course. The same applies to a PKGBUILD.
Github link with installation instructions.
Please let me know whether you find it useful!

Answer 1

The listing is alphabetical:
$ ./foo Thu Jul 09 21:29:43 CEST 2014
shaman-git
$ ./foo Thu Jul 09 11:29:43 CEST 2014
flashplugin
imagemagick
intel-dri
libsystemd
mesa
mesa-libgl
shaman-git
systemd
systemd-sysvcompat
xorg-xkbcomp
You may want to sort it e.g. from the oldest to the most recent:
$ cat bar
#!/bin/bash
datesec=$(date -d "$*" +%s)
expac --timefmt=%s '%l %n' | sort -n | awk -v a=$datesec '$1>=a {print $2}'
(just added 'sort -n' before the awk part)
Date has to be in a certain format for the script to work:
$ ./foo 11/07/2014
$ ./foo Jul 11
shaman-git