fileRestore.sh

#!/usr/bin/env bash
## delete regular files only depending on structure of dotfiles
## example: if $1 is a path leading to $HOME/back/FOLDER, we restore
## restoring only works, if there is currently no file

# The following script assumes filenames do not contain
# control characters and dont contain leading dashes(-).
set -o errexit         # abort on nonzero exitstatus
set -o nounset         # abort on unbound variable
set -o pipefail        # don't hide errors within pipes
IFS="$(printf '\n\t')" # change IFS to just newline and tab

FAIL="TRUE" # will be filled with defaults
cd "${HOME}/dotfiles"
dotfilePaths="$(fd -uu --type f --ignore-file "$HOME/dotfiles/ignorefiles" --ignore-file "$HOME/dotfiles/.gitignore")"

if test -z "$1"; then
  echo "no path to restore folder"
  echo "usage: ./fileRestore.sh $HOME/back/FOLDER"
fi

ROOT_BACK_FOLDER="$1"
rootbackupFolderPath=$(dirname "$ROOT_BACK_FOLDER")
if test "$rootbackupFolderPath" != "${HOME}/back"; then
  echo "$1 (backup folder) is not in $HOME/back"
  echo "usage: ./fileRestore.sh $HOME/back/FOLDER"
fi
if ! test -d "$rootbackupFolderPath"; then
  echo "$1 (backup folder) is no folder"
  echo "usage: ./fileRestore.sh $HOME/back/FOLDER"
fi

while IFS= read -r dfPath; do
  printf '%-40s' "$dfPath"
  dfabsPath="${HOME}/dotfiles/${dfPath}"
  backupAbsPath="${ROOT_BACK_FOLDER}/${dfPath}"
  # backupFolderPath=$(dirname "$backupAbsPath")
  sysAbsPath="${HOME}/${dfPath}"
  # sysFolderPath=$(dirname "$sysAbsPath")
  if test -e "$dfabsPath"; then
    if test -f "$backupAbsPath"; then
      if ! test -e "$sysAbsPath"; then
        cp "$backupAbsPath" "$sysAbsPath"
        printf '%-20s' "did restore"
        FAIL="FALSE"
      else
        printf '%-20s' "file in user profile"
      fi
    else
      printf '%-20s' "backup: no such regular file"
    fi
  else
    printf '%-20s' "FATAL: fix fd or ignorefiles"
  fi
  echo -en "\n"
done <<<"$dotfilePaths"
if test "$FAIL" = "FALSE"; then
  echo "restored from ${ROOT_BACK_FOLDER}"
else
  echo "could not restore from ${ROOT_BACK_FOLDER}"
fi