[arch-general] scripts to analyze and manage /var/cache/pacman/pkg for installed/uninstalled & gen install scr for uninstalled

[Crouse]

In the event of a sudden termination event for the program, it would
be nice to have a check there.
Look into "trap" and make sure no matter what your IFS gets set back
to it's original value
even if someone does a CTRL+ALT+DEL.  ;)

Dave Crouse



On Mon, Dec 7, 2009 at 7:02 PM, David C. Rankin
<drankinatty at suddenlinkmail.com> wrote:
> Guys,
>
> With a number of arch boxes now, I routinely rsync the package cache from box to box for updates, etc. Today what started out as a "1-liner" to show what scripts in /var/cache/pacman/pkg were installed, uninstalled (what I called orphaned) and then to create summary files and create a script to install the orphans -- well -- turned into somewhat of a longer script that I thought I would pass along.
>
> The script 'chkinstpkgs.sh' does just that. Check the installed packages and give you a summary of what is going on with your package cache. I'm sure I just reinvented the wheel, but it was fun nonetheless. The script is at:
>
> http://www.3111skyline.com/download/Archlinux/scripts/chkinstpkgs.sh
>
> I left all my development commented out at the end of the file -- there were some neat parse parameter substitutions, etc.. that I ultimately didn't use that might be helpful for anyone wanting to mess with managing their package cache, or at least provide a "go-by" for anyone interested in learning a bit more bash.
>
> The -h | --help option displays a short help:
>
> 18:30 alchemy:~/scr/arch> sh chkinstpkgs.sh -h
>
>  Usage:  chkinstpkgs.sh [package-dir] [orphans-file] [installed-file] [install-orphans-file]
>
>  chkinstpkgs.sh checks all packages in 'package-dir' to see whether the file is
>  installed or whether the package is an orphan (exists in 'package-dir' but
>  isn't installed). Results are printed to the screen and saved in the users
>  home directory as shown below:
>
>  Where the defaults are:
>                 package-dir=/var/cache/pacman/pkg/
>                orphans-file=~/pkgs-orphans.txt
>              installed-file=~/pkgs-installed.txt
>        install-orphans-file=~/pkgs-install-orphans.sh
>
>  Options:
>  -h | --help      display usage help and exit
>  -s | --summary   display packages totals, installed, orphaned and exit
>
> The -s | --summary just gives a numeric summary of the installed/orphaned:
>
> 18:30 alchemy:~/scr/arch> sh chkinstpkgs.sh -s
>
>  Determining installed/orphaned packages in /var/cache/pacman/pkg...
>
>    Initializing the package-information arrays
>    Checking installed packages
>
>    Total Number of Packages : 2072
>    Total Number Installed   : 1626
>    Total Number Orphaned    : 446
>
> Just running the whole script produces a complete summary on the screen and also creates the summary files shown above under the defaults:
>
> 18:31 alchemy:~/scr/arch> head ~/pkgs-orphans.txt
> error: package "a2ps" not found
> error: package "acct" not found
> error: package "acpi" not found
> error: package "acpid" not found
> <snip>
>
> 18:42 alchemy:~/scr/arch> head ~/pkgs-installed.txt
>
> Installed Packages - 12/07/09
>
> a2ps-4.14-1-x86_64.pkg.tar.gz
> a52dec-0.7.4-4-x86_64.pkg.tar.gz
> aalib-1.4rc5-6-x86_64.pkg.tar.gz
> abs-2.3.3-1-x86_64.pkg.tar.gz
> acct-6.3.2-2-x86_64.pkg.tar.gz
> <snip>
>
> 18:42 alchemy:~/scr/arch> head ~/pkgs-install-orphans.sh
> pacman -Sy a2ps acct acpi acpid acpitool acpitool agg archlinux-menus archlinux-menus b43-fwcutter bc bind blas bridge-utils capi4k-utils cyrus-sasl cyrus-sasl-plugins db4.5 dbus-qt3 ddcxinfo-arch dhcp dmapi dmraid dovecot dvd-slideshow filelight flashplugin font-bitstream-speedo font-bitstream-speedo foomatic-db foomatic-db-nonfree <snip>
>
> Just delete the ones you don't want to install (beats creating the list from scratch)
>
> The script takes ~ 30 seconds per 1000 packages to run. It took about a minute to complete on my laptop. Enjoy.
>
> Other package cache scripts available:
>
> http://www.3111skyline.com/download/Archlinux/scripts/fduparchpkg
> http://www.3111skyline.com/download/Archlinux/scripts/fduppkg
>
> The above scripts remove duplicate packages from the package cache and move them to /home/backup/pkg-old and /home/backup/pkg-older. The workhorse is fduppkg and fduparchpkg is just a wrapper that calls fduppkg. I just create links to the files in /usr/local/bin:
>
> lrwxrwxrwx  1 root root     30 Dec  7 18:22 fduparch -> /home/david/scr/pm/fduparchpkg
> lrwxrwxrwx  1 root root     26 Nov  5 02:21 fduppkg -> /home/david/scr/pm/fduppkg
>
> then just call fduparch and it will move all duplicates from /var/cache/pacman/pkg to /home/backup/pkg-old and then remove all duplicates (newly created) from /home/backup/pkg-old and move them to /home/backup/pkg-older. That way you always have current packages in /var/cache/pacman/pkg, a clean set of the next most recent packages in /home/backup/pkg-old and the package dump of /home/backup/pkg-older where you can keep as many as you want.
>
> One primary benefit of moving the packages to /home/backup is it frees up space on your / partition as well as cleaning up /var/cache/pacman. I have posted the dup scripts before, but these have a few updates that optimize things better to cut down on runtime. Even with several thousand packages, the scripts run in about a minute as well.
>
> Last note: for any Archers who would like to dig into bash scripting a little more. I like to think these scripts have a lot of cool stuff in them (at least I think so...) and provide a good reference for loops, arrays, array and loop index manipulation for optimizations, redirection, subshells, functions, parameter substitution and substring extraction that are fairly good tools to put in your *nx toolbox. Believe it or not, I actually take some time to comment the scripts with that purpose in mind. (and so I can remember what the hell I was thinking a year from now...)
>
> For all you gurus out there, if you happen to look at the scripts and see things I could do better, I welcome the feedback because I'm always open to adding new tools to my toolbox as well ;-)
>
> --
> 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
>