zsdatable

#!/bin/bash

##################################################
#      program: zsdatable
#      package: zsdatab
##################################################
#       author: Erik Kai Alain Zscheile
#        email: erik.zscheile.ytrizja@gmail.com
##################################################
# organisation: Ytrizja
#     org unit: Zscheile IT
#     location: Chemnitz, Saxony
##################################################
#
# Copyright (c) 2019 Erik Kai Alain Zscheile
#
# Permission is hereby granted, free of charge, to any person obtaining a copy of this software
# and associated documentation files (the "Software"),
# to deal in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
# and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
# INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
# IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
# WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
#
##################################################

if [[ -z $1 || -z $2 ]]; then
  cat <<EOF
USAGE: zsdatable TABLE CMD ARGS...

Commands:
  mk  SEPERATOR COLUMNS...  make table
  mmk METAFILE              make table from metafile
  rm                        delete table
  chmod MODE                chmod table
  mv  DESTINATION           move table to DESTINATION

zsdatab v0.3.1 by Erik Zscheile <erik.zscheile.ytrizja@gmail.com>
released under X11-License
EOF
  exit 1
fi

zerror() {
  echo "zsdatable: ERROR: $*" 1>&2
  exit 1
}

readonly TABLE=$1
shift

case "$1" in
  (mk|mmk)
    [[ -f $TABLE ]] && zerror "$TABLE: file already exists"
    ;;

  (*)
    [[ -f $TABLE ]] || zerror "$TABLE: file not found"
    ;;
esac

if [[ mk == $1 ]]; then
  (
    SEP="$2"
    echo -n "$SEP"
    shift 2
    echo "$*" | tr '; ' "_$SEP"
  ) > "$TABLE.meta"
elif [[ mmk == $1 ]]; then
  [[ -f $2 ]] || zerror "$2: file not found"
  cp "$2" "$TABLE.meta"
fi

case "$1" in
  (mk|mmk)
    touch "$TABLE"
    chmod a-w "$TABLE.meta"
    ;;

  (rm)
    rm -f "$TABLE" "$TABLE.meta"
    ;;

  (chmod)
    "$@" "$TABLE" "$TABLE.meta"
    ;;

  (mv)
    if [ -d "$2" ]; then
      mv -f -t "$2" "$TABLE" "$TABLE.meta"
    else
      SUC=1
      for i in '' .meta; do
        cp -f "$TABLE$i" "$2$i" || { SUC=0; break; }
      done
      if (( $SUC == 0 )); then
        rm -f "$2" "$2.meta"
        zerror "cp failed"
      fi
      rm -f "$TABLE" "$TABLE.meta"
    fi
    ;;

  (*)
    zerror "unknown command '$1'"
    ;;
esac