mirror of
https://github.com/nix-community/home-manager
synced 2024-11-14 15:19:45 +01:00
d6b1d42682
This is not a standalone script, it's only meant to be included from the activation script.
81 lines
2.7 KiB
Bash
81 lines
2.7 KiB
Bash
function setupVars() {
|
|
local nixStateDir="${NIX_STATE_DIR:-/nix/var/nix}"
|
|
local profilesPath="$nixStateDir/profiles/per-user/$USER"
|
|
local gcPath="$nixStateDir/gcroots/per-user/$USER"
|
|
|
|
declare -gr nixProfilePath="$profilesPath/profile"
|
|
declare -gr genProfilePath="$profilesPath/home-manager"
|
|
declare -gr newGenPath="@GENERATION_DIR@";
|
|
declare -gr newGenGcPath="$gcPath/current-home"
|
|
|
|
local greatestGenNum
|
|
greatestGenNum=$( \
|
|
nix-env --list-generations --profile "$genProfilePath" \
|
|
| tail -1 \
|
|
| sed -E 's/ *([[:digit:]]+) .*/\1/')
|
|
|
|
if [[ -n $greatestGenNum ]] ; then
|
|
declare -gr oldGenNum=$greatestGenNum
|
|
declare -gr newGenNum=$((oldGenNum + 1))
|
|
else
|
|
declare -gr newGenNum=1
|
|
fi
|
|
|
|
if [[ -e $profilesPath/home-manager ]] ; then
|
|
oldGenPath="$(readlink -e "$profilesPath/home-manager")"
|
|
declare -gr oldGenPath
|
|
fi
|
|
|
|
$VERBOSE_RUN _i "Sanity checking oldGenNum and oldGenPath"
|
|
if [[ -v oldGenNum && ! -v oldGenPath
|
|
|| ! -v oldGenNum && -v oldGenPath ]]; then
|
|
_i $'The previous generation number and path are in conflict! These\nmust be either both empty or both set but are now set to\n\n \'%s\' and \'%s\'\n\nIf you don\'t mind losing previous profile generations then\nthe easiest solution is probably to run\n\n rm %s/home-manager*\n rm %s/current-home\n\nand trying home-manager switch again. Good luck!' \
|
|
"${oldGenNum:-}" "${oldGenPath:-}" \
|
|
"$profilesPath" "$gcPath"
|
|
exit 1
|
|
fi
|
|
}
|
|
|
|
if [[ -v VERBOSE ]]; then
|
|
export VERBOSE_ECHO=echo
|
|
export VERBOSE_ARG="--verbose"
|
|
export VERBOSE_RUN=""
|
|
else
|
|
export VERBOSE_ECHO=true
|
|
export VERBOSE_ARG=""
|
|
export VERBOSE_RUN=true
|
|
fi
|
|
|
|
_i "Starting Home Manager activation"
|
|
|
|
# Verify that we can connect to the Nix store and/or daemon. This will
|
|
# also create the necessary directories in profiles and gcroots.
|
|
$VERBOSE_RUN _i "Sanity checking Nix"
|
|
nix-build --expr '{}' --no-out-link
|
|
|
|
setupVars
|
|
|
|
if [[ -v DRY_RUN ]] ; then
|
|
_i "This is a dry run"
|
|
export DRY_RUN_CMD=echo
|
|
else
|
|
$VERBOSE_RUN _i "This is a live run"
|
|
export DRY_RUN_CMD=""
|
|
fi
|
|
|
|
if [[ -v VERBOSE ]]; then
|
|
_i 'Using Nix version: %s' "$(nix-env --version)"
|
|
fi
|
|
|
|
$VERBOSE_RUN _i "Activation variables:"
|
|
if [[ -v oldGenNum ]] ; then
|
|
$VERBOSE_ECHO " oldGenNum=$oldGenNum"
|
|
$VERBOSE_ECHO " oldGenPath=$oldGenPath"
|
|
else
|
|
$VERBOSE_ECHO " oldGenNum undefined (first run?)"
|
|
$VERBOSE_ECHO " oldGenPath undefined (first run?)"
|
|
fi
|
|
$VERBOSE_ECHO " newGenPath=$newGenPath"
|
|
$VERBOSE_ECHO " newGenNum=$newGenNum"
|
|
$VERBOSE_ECHO " newGenGcPath=$newGenGcPath"
|
|
$VERBOSE_ECHO " genProfilePath=$genProfilePath"
|