[arch-general] Remove duplicate packages from /var/cache/pacman/pkg script updated

[David C. Rankin]

In case anyone uses it, I updated my fduppkg script that scans 
/var/cache/pacman/pkg and moves duplicate packages to a separate directory so 
you can either keep the current + last package sets or just delete the dups. 
This update just cleans up the output and adds an -s | --silent option that 
suppresses all screen output and simply writes to the log file. Additionally the 
screen output has been cleaned up so it looks like this now:

[14:18 alchemy:/home/david] # fduparch

fduppkg /var/cache/pacman/pkg -d /home/backup/pkg-old -l /home/backup/pkgdups.log

Total packages to screen:  2858
Removing duplicates from:  /var/cache/pacman/pkg
Duplicates directory:      /home/backup/pkg-old
Log file location:         /home/backup/pkgdups.log
Verbose mode set:          [use -q to stop pkg output | -s to stop all output]

pkg [ 434] feh                         dup => feh-1.8-1-x86_64.pkg.tar.xz
pkg [ 727] gstreamer0                  dup => 
gstreamer0.10-ugly-0.10.15-4-x86_64.pkg.tar.xz
pkg [ 785] gtranslator                 dup => gtranslator-1.9.7-1-x86_64.pkg.tar.gz
pkg [1446] kernel26-docs               dup => 
kernel26-docs-2.6.35.3-1-x86_64.pkg.tar.xz
pkg [1869] lpsolve                     dup => lpsolve-5.5.0.15-1-x86_64.pkg.tar.gz
pkg [1895] madwifi                     dup => madwifi-0.9.4.4119-2-x86_64.pkg.tar.xz
pkg [2043] obexd-client                dup => obexd-client-0.29-3-x86_64.pkg.tar.xz
pkg [2070] openssh                     dup => openssh-5.5p1-1-x86_64.pkg.tar.xz
pkg [2263] pulseaudio                  dup => pulseaudio-0.9.21-8-x86_64.pkg.tar.xz
pkg [2399] ruby                        dup => ruby-1.9.1_p429-1-x86_64.pkg.tar.xz
pkg [2537] timidity++                  dup => timidity++-2.13.2-9-x86_64.pkg.tar.xz

11  duplicates moved to /home/backup/pkg-old

     I've set the package name field width to 26 as a compromise to handle most 
package names. (You wouldn't have any screen left if it was wide enough for all 
the screwy kde4 50+ char package names). If the output above wraps -- you get 
the drift. In verbose mode (default) you get a summary showing the total number 
of packages to be screened, being moved from /var/cache/pacman/pkg to the dupdir 
you specify and the files moved are logged in the logfile you specify.

     The package listing just shows the array index for the current package and 
any dups found are shown on the right. I find it handy, YMMV. The way I use it 
is to set up a 'wrapper script' to call fduppkg twice.

Once to move dups from /var/cache/pacman/pkg => /home/backup/pkg-old

Then again to move dups from /home/backup/pkg-old => /home/backup/pkg-older

That way I have the current set in /var/cache/pacman/pkg and a clean last 
installed set in /home/backup/pkg-old. Plus moving to /home/backup will offload 
the storage from / to /home partitions on most installs.

The main fduppkg scrip is here:

http://www.3111skyline.com/dl/Archlinux/scripts/fduppkg

The wrapper script I use to call fduppkg is here:

http://www.3111skyline.com/dl/Archlinux/scripts/fduparch.sh

I just link the scripts to /usr/local/bin as follows and then make sure 
/usr/local/bin is in your path:

lrwxrwxrwx  1 root  root      32 Apr 18 19:17 fduparch -> 
/home/david/scr/arch/fduparch.sh
lrwxrwxrwx  1 root  root      28 Apr 18 19:18 fduppkg -> 
/home/david/scr/arch/fduppkg

Then once you have edited fduparch.sh and set the directories and options the 
way you like it, just call fduparch as root or 'sudo fduparch' and all dups will 
be moved to the directory you specify.

(NOTE: this script uses the package DATE to determine which is the newest 
package, so if you have somehow reset all the ctime or mtime info on your files 
by block copying them without preserving the file attributes, it won't work)

(Yes I know I have left comments and commented out stuff in the scripts, they 
are still works in progress :-)


-- 
David C. Rankin, J.D.,P.E.
Rankin Law Firm, PLLC
510 Ochiltree Street
Nacogdoches, Texas 75961
Telephone: (936) 715-9333
Facsimile: (936) 715-9339
www.rankinlawfirm.com