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activation-init: sanity check oldGenNum and oldGenPath

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Something is terribly wrong if one is set but not the other so error
out with a message if that happens.
This commit is contained in:
Robert Helgesson 2018-03-13 20:49:45 +01:00
parent fa7d63d9d1
commit 567b21b1d6
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GPG Key ID: C3DB11069E65DC86
1 changed files with 21 additions and 6 deletions
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27
modules/lib-bash/activation-init.sh
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@ -11,27 +11,38 @@ function setupVars() {
| sort -rn \
| head -1)
if [[ -n "$greatestGenNum" ]] ; then
if [[ -n $greatestGenNum ]] ; then
oldGenNum=$greatestGenNum
newGenNum=$((oldGenNum + 1))
else
newGenNum=1
fi
if [[ -e "$gcPath/current-home" ]] ; then
if [[ -e $gcPath/current-home ]] ; then
oldGenPath="$(readlink -e "$gcPath/current-home")"
fi
$VERBOSE_ECHO "Sanity checking oldGenNum and oldGenPath"
if [[ -v oldGenNum && ! -v oldGenPath
|| ! -v oldGenNum && -v oldGenPath ]]; then
errorEcho "Invalid profile number and GC root values! These must be"
errorEcho "either both empty or both set but are now set to"
errorEcho " '${oldGenNum:-}' and '${oldGenPath:-}'"
errorEcho "If you don't mind losing previous profile generations then"
errorEcho "the easiest solution is probably to run"
errorEcho " rm $profilesPath/home-manager*"
errorEcho " rm $gcPath/current-home"
errorEcho "and trying home-manager switch again. Good luck!"
exit 1
fi
genProfilePath="$profilesPath/home-manager"
newGenPath="@GENERATION_DIR@";
newGenProfilePath="$profilesPath/home-manager-$newGenNum-link"
newGenGcPath="$gcPath/current-home"
}
setupVars
echo "Starting home manager activation"
if [[ -v VERBOSE ]]; then
export VERBOSE_ECHO=echo
export VERBOSE_ARG="--verbose"
@ -40,6 +51,10 @@ else
export VERBOSE_ARG=""
fi
echo "Starting home manager activation"
setupVars
if [[ -v DRY_RUN ]] ; then
echo "This is a dry run"
export DRY_RUN_CMD=echo