zigford.org/downgrade-gentoo-from-testing-to-stable.md
2020-07-21 06:49:32 +10:00

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Downgrade Gentoo from testing to stable
At some point in my main Gentoo boxes life I added the ~amd64 keyword into
my make.conf. I don't remeber why I did this, but I can't think of a reason
I need my entire install to be bleeding edge.
---
I did some googling around on the best approach to achieve this and from
what I read on forums, having a bunch of testing packages downgrade to
stable is not such a good idea.
One reason might be that per app config files are usually only designed to
be backward compatible, not forward compatible.
At any rate, the idea is to gather a list of currently installed testing
packages and add them to package.keywords for their current version.
With this method, eventually those packages will become stable.
The method I used is basically from the [sabayon wiki](https://wiki.sabayon.org/index.php?title=HOWTO:_Switch_from_Test_to_Stable_Packages) with a few
tweaks.
1. First, edit make.conf ACCEPT_KEYWORDS to:
ACCEPT_KEYWORDS=amd64
2. Now use equery, sed and grep to construct a new packge.keywords
equery -C -N list -F '=$cpv $mask2' '*' | \
grep \~ | sed 's/\[~amd64 keyword\]/~amd64/' > \
/etc/portage/package.keywords/testpackages
_Basically I added '-C' to remove colours and grep_
3. Examine testpackages for sanity, and then test with a world upgrade.
emerge --ask --update --newuse --deep --with-bdeps=y @world
These are the packages that would be merged, in order:
Calculating dependencies... done!
Nothing to merge; quitting.
Update
------
18 months since making this change I thought I'd see how many of the original
testing packages are still on my system. This little shell snippit uses equery
to check if a package listed in the `testpackages` portage file made earlier is
still installed on the system, and if not, update the file with a `#` in front.
for i in $(awk '/=/ {print $1}' testpackages)
do
if ! equery l "$i" > /dev/null;
then
sudo sed -ie "s/\(${i/\//\\/}\)/#\1/" \
testpackages
fi
done
After running this `grep -c '^#' testpackages` shows 368 packages no longer
needed in here and conversely 118 are still required.
Tags: gentoo, portage