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home-manager/modules/activation-init.sh
Robert Helgesson f35b9a9970
Add initial section of activation script
The initial section creates some useful variables for use by later
activation sections.
2017-01-16 20:33:53 +01:00

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function setupVars() {
local profilesPath="/nix/var/nix/profiles/per-user/$USER"
local gcPath="/nix/var/nix/gcroots/per-user/$USER"
local greatestGenNum
greatestGenNum=$( \
find "$profilesPath" -name 'home-manager-*-link' \
| sed 's/^.*-\([0-9]*\)-link$/\1/' \
| sort -rn \
| head -1)
if [[ -n "$greatestGenNum" ]] ; then
oldGenNum=$greatestGenNum
newGenNum=$((oldGenNum + 1))
else
newGenNum=1
fi
if [[ -e "$gcPath/current-home" ]] ; then
oldGenPath="$(readlink -e "$gcPath/current-home")"
fi
newGenPath="@GENERATION_DIR@";
newGenProfilePath="$profilesPath/home-manager-$newGenNum-link"
newGenGcPath="$gcPath/current-home"
}
setupVars
echo "Starting home manager activation"
if [[ $DRY_RUN ]] ; then
echo "This is a dry run"
export DRY_RUN_CMD=echo
else
echo "This is a live run"
unset DRY_RUN_CMD
fi
echo "Activation variables:"
echo " oldGenNum=$oldGenNum"
echo " newGenNum=$newGenNum"
echo " oldGenPath=$oldGenPath"
echo " newGenPath=$newGenPath"
echo " newGenProfilePath=$newGenProfilePath"
echo " newGenGcPath=$newGenGcPath"