Optimizing Gentoo: Vacuum Portage Configurations

Alex Brandt Comments

All systems collect dust but with the configurability of Gentoo, we tend to collect a bit more dust in our world than other distributions. This will be a quick walkthrough of helpful one-liners that assist with keeping /etc/portage/package.* clean.

In all of the examples presented, replace /etc/portage/package.use with the file you are currently cleaning.

Check for Multiple Occurences of an Atom

for atom in $(gawk '{ print $1 }' /etc/portage/package.use)
do
  [ "${grep ${atom} /etc/portage/package.use | wc -l)" -gt "1" ] && echo ${atom}
done

Check for N Uses of a USE Flag

for flag in ${gawk '{ print $2 }' /etc/portage/package.use)
do
  [ "${grep "${flag}" /etc/portage/package.use | wc -l)" -gt "2" ] && echo ${flag}
done

This can be used to find frequently used USE flags that might be better placed in /etc/make.conf.

Check for Removed Atoms

for atom in $(gawk '{ print $1 }' /etc/portage/package.use)
do
  [ "$(portageq match / ${atom} | wc -l)" -lt "1" ] && echo ${atom}
done

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