hidesyncdf

#!/usr/bin/env bash
#
# copy hidden files from this repository into the HOME directory if the copy in
# the repository is newer--after backing up the version in the HOME directory.
#

function dgst {
  openssl dgst "$1" | cut -d " " -f2

  return $?
}

mkdir home-backup repo-backup 2>/dev/null
chmod -v -- 0700 home-backup repo-backup 2>/dev/null

## TODO: same thing for find ~/.* -type f
for adot in $(find ./ -type f -mindepth 1 -maxdepth 1 -name 'dot*' -exec basename {} \; 2>/dev/null); do
  df=`echo "$adot" | sed 's!^dot!.!'`
  ho="${HOME}/${df}"
  dgst_df=`dgst "$df"` dgst_ho=`dgst "$ho"`

  if [ ! "$dgst_df" -a "$dgst_ho" ]; then
    echo '*** Backing up ' $df ' to repo-backup'

    cp -av -- "$df" repo-backup 

    echo '*** Overwriting ' $df ' with ' $ho

    cp -av -- "$ho" .

    continue
  else
    if [ ! "$dgst_ho" -a "$dgst_df" ]; then 
      echo '*** Backing up ' $ho ' to home-backup'
    
      cp -av -- "$ho" home-backup 

      echo '*** Overwriting ' $df ' with ' $ho

      cp -av -- "$df" "$ho" 
    
      continue
    else
      if [ "$dgst_df" == "$dgst_ho" ]; then
        echo '*** Contents of files are equal: ' $df ' and ' $ho

        continue
      else
        if [ "$df" -nt "$ho" ]; then 
          echo '*** ' $df ' has a newer modification time than ' $ho
          echo '*** Backing up ' $ho ' to home-backup'

          cp -av -- "$ho" home-backup 
          cp -av -- "$df" "$ho"

          echo '*** Wrote over ' $ho ' with ' $df
        else
          if [ "$ho" -nt "$df" ]; then
            echo '*** ' $ho ' has a newer modification time than ' $df
            echo '*** Backing up ' $ho ' to repo-backup'

            cp -av -- "$df" repo-backup 
            cp -av -- "$ho" "$df"

            echo '*** Wrote over ' $df ' with ' $ho
          fi
        fi
      fi
    fi
  fi
done

exit 0