Talk:Downgrading packages

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Revision as of 16:00, 5 December 2013 by Lahwaacz (Talk | contribs) (ARM downgrade helpers: new section)

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Parallel Programs Dependency Issue

There is another problem you haven't considered: When there are already vital packages installed (like xorg) that require the newer version of the programm (like gcc-4.x).

Is there a way to tell pacman to install the older version (in my case gcc-3.x) parallel to the newer version, thus not hurting any dependencies?

Answer

Sometimes the only way to make something work is to make sure that the dependency's version is downward compatible. If it isn't, then the older version of the program itself needs to be adjusted to work, and that is something that programmers are obviously not likely to do.

Keeping two or more versions of a particular program installed is possible in many cases.

In any case, it appears that the only accurate information we have on pacman is found at "man pacman" and "man pacman.conf" from the command line. Perhaps you will find the proper procedure there. KitchM 13:09, 6 August 2009 (EDT)

Not sure how to add this...

#zsh

#use a simple var during downgrade process
downgrade="exact-package-package-name"

#make sure to remove the package and its configs
sudo pacman -Rn $downgrade

#OPTIONALLY search for config files in the common places
ls -ah ~/ | grep $downgrade
#and remove them
rm -R ./$downgrade

#build directory
mkdir /tmp/$downgrade && cd /tmp/$downgrade

#make your way to http://pkgbuild.com/git/aur-mirror.git
#using the web interface locate the version of the package you would like to install
#copy the link of the tree view of the package directory (eg http://pkgbuild.com/git/aur-mirror.git/tree/dropbox?id=b19a54c808554c796f310747725ad2ff4291e44a) 

#scrape the link for files and output them to 'files'
wget -q -O - 'http://pkgbuild.com/git/aur-mirror.git/tree/dropbox?id=b19a54c808554c796f310747725ad2ff4291e44a' | grep -o "/git/aur-mirror.git/plain/[^']*" | sed -e 's/^/http:\/\/pkgbuild.com/' > files

#download the files
wget -qi files

#clean file names (will generate errors, so just ignore them)
ls | sed -n 's/\([^?]*\)\(.*\)/mv "\1\2" "\1"/p' | sh

#build the package
makepkg -s

#install
pacman -U $downgrade*.pkg.tar.xz

#optionally clean up environment
cd && rm /tmp/$downgrade
unset downgrade
You can add it to a seperate file. Look into Category:Scripts for examples. And then add a link to your new page. -- Fengchao (talk) 04:45, 20 September 2012 (UTC)

ARM doesn't support searching [multilib]

ARM is a regular server (although one that doesn't remove the old versions), so multilib packages are available but they're not shown if you use the search interface. Should we mention this in the article?

$ armh --arch x86_64 --search lib32-glib2 works on my 32-bit Arch, so maybe we should suggest using the helper scripts?

-- Karol (talk) 13:07, 26 May 2013 (UTC)

I'd say yes to both proposals, it could be helpful to know for somebody. -- Kynikos (talk) 06:52, 29 May 2013 (UTC)
The new ARM does not have search interface, closing. -- Lahwaacz (talk) 15:55, 5 December 2013 (UTC)

ARM downgrade helpers

Does downgradeAUR support the new ARM? It seems to use http://repo-arm.archlinuxcn.org/ by default, perhaps that should be mentioned along with downgradeAUR... -- Lahwaacz (talk) 16:00, 5 December 2013 (UTC)