depot/third_party/home-manager/modules/files/check-link-targets.sh

60 lines
2 KiB
Bash
Raw Normal View History

# -*- mode: sh; sh-shell: bash -*-
@initHomeManagerLib@
# A symbolic link whose target path matches this pattern will be
# considered part of a Home Manager generation.
homeFilePattern="$(readlink -e @storeDir@)/*-home-manager-files/*"
forcedPaths=(@forcedPaths@)
newGenFiles="$1"
shift
for sourcePath in "$@" ; do
relativePath="${sourcePath#$newGenFiles/}"
targetPath="$HOME/$relativePath"
forced=""
for forcedPath in "${forcedPaths[@]}"; do
if [[ $targetPath == $forcedPath* ]]; then
forced="yeah"
break
fi
done
if [[ -n $forced ]]; then
verboseEcho "Skipping collision check for $targetPath"
elif [[ -e "$targetPath" \
&& ! "$(readlink "$targetPath")" == $homeFilePattern ]] ; then
# The target file already exists and it isn't a symlink owned by Home Manager.
if cmp -s "$sourcePath" "$targetPath"; then
# First compare the files' content. If they're equal, we're fine.
warnEcho "Existing file '$targetPath' is in the way of '$sourcePath', will be skipped since they are the same"
elif [[ ! -L "$targetPath" && -n "$HOME_MANAGER_BACKUP_EXT" ]] ; then
# Next, try to move the file to a backup location if configured and possible
backup="$targetPath.$HOME_MANAGER_BACKUP_EXT"
if [[ -e "$backup" ]]; then
errorEcho "Existing file '$backup' would be clobbered by backing up '$targetPath'"
collision=1
else
warnEcho "Existing file '$targetPath' is in the way of '$sourcePath', will be moved to '$backup'"
fi
else
# Fail if nothing else works
errorEcho "Existing file '$targetPath' is in the way of '$sourcePath'"
collision=1
fi
fi
done
if [[ -v collision ]] ; then
errorEcho "Please do one of the following:
- Move or remove the above files and try again.
- In standalone mode, use 'home-manager switch -b backup' to back up
files automatically.
- When used as a NixOS or nix-darwin module, set
'home-manager.backupFileExtension'
to, for example, 'backup' and rebuild."
exit 1
fi