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home-environment: fix activation on new style profiles

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When using the new style profiles we get conflicts when trying to
replace the old `home-path` derivation. To avoid this conflict we
delete the old `home-path` before the install.

Unfortunately, `nix profile` does not yet have a equivalent for
`nix-env --set` and we have to do this hackish workaround. See

  https://github.com/NixOS/nix/issues/6349

for the associated issue in Nix.

Fixes #2848
This commit is contained in:
Ronny Pfannschmidt 2022-09-08 13:08:57 +02:00 committed by Robert Helgesson
parent c728307482
commit ccc9164b76
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1 changed files with 17 additions and 2 deletions
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19
modules/home-environment.nix
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@ -592,22 +592,37 @@ in
''
else
''
function nixReplaceProfile() {
local oldNix="$(which nix)"
nix profile list \
| { grep 'home-manager-path$' || test $? = 1; } \
| awk -F ' ' '{ print $4 }' \
| cut -d ' ' -f 4 \
| xargs -t $DRY_RUN_CMD nix profile remove $VERBOSE_ARG
$DRY_RUN_CMD $oldNix profile install $1
}
if [[ -e "$nixProfilePath"/manifest.json ]] ; then
INSTALL_CMD="nix profile install"
INSTALL_CMD_ACTUAL="nixReplaceProfile"
LIST_CMD="nix profile list"
REMOVE_CMD_SYNTAX='nix profile remove {number | store path}'
else
INSTALL_CMD="nix-env -i"
INSTALL_CMD_ACTUAL="$DRY_RUN_CMD nix-env -i"
LIST_CMD="nix-env -q"
REMOVE_CMD_SYNTAX='nix-env -e {package name}'
fi
if ! $DRY_RUN_CMD $INSTALL_CMD ${cfg.path} ; then
if ! $INSTALL_CMD_ACTUAL ${cfg.path} ; then
echo
_iError $'Oops, Nix failed to install your new Home Manager profile!\n\nPerhaps there is a conflict with a package that was installed using\n"%s"? Try running\n\n %s\n\nand if there is a conflicting package you can remove it with\n\n %s\n\nThen try activating your Home Manager configuration again.' "$INSTALL_CMD" "$LIST_CMD" "$REMOVE_CMD_SYNTAX"
exit 1
fi
unset INSTALL_CMD LIST_CMD REMOVE_CMD_SYNTAX
unset -f nixReplaceProfile
unset INSTALL_CMD INSTALL_CMD_ACTUAL LIST_CMD REMOVE_CMD_SYNTAX
''
);