cyghome - Cygwin HOME directory utility

cyghome.sh

#!/usr/bin/env bash
#
# cyghome - Cygwin HOME directory utility
# Copyright (c) 2017 Koichi OKADA. All rights reserved.
# This script is distributed under the MIT license.
#

(( 5 <= DEBUG )) && set -x

function help ()
{
  cat<<-EOD
	Usage: ${SCRIPT_NAME} [options] COMMAND
	Options:
	  -h, --help
	  -t TARGET     default: "${TARGET}"
	Commands:
	  setup         Move HOME to TARGET and link TARGET to HOME
	  resetup       Link TARGET to HOME
	  restore       Move TARGET to HOME
	  ln FILES ...  Link FILES to HOME/
	EOD
}

SCRIPT_FILE="${0##*/}"
SCRIPT_NAME="${SCRIPT_FILE%.*}"

USERPROFILE="$(cygpath -u "$USERPROFILE")"
TARGET="$USERPROFILE/HOME"
PWD="$(realpath .)"
ARGS=()
while (( 0 < $# )); do
  case "$1" in
    -h|--help)
      OPT_H="$1"
      shift
      ;;
    -t)
      TARGET="$2"
      shift 2
      ;;
    *)
      ARGS+=( "$1" )
      shift
      ;;
  esac
done
set -- "${ARGS[@]}"

if [ -n "$OPT_H" ] || (( $# < 1 )); then
  help
  exit
fi



TARGET="$(cygpath -u "$TARGET")"



function mtime ()
{
  find "$1" -type f -or -type l -exec date -r {} +"%Y%m%d_%H%M%S" \; \
  | sort | tail -n1
}

function cyghome_setup ()
{
  if [ -e "$TARGET" ]; then
    cat<<-EOD >&2
	Error: TARGET already exists.
	EOD
    exit 1
  fi
  
  if [ -e "$HOME/USERPROFILE" -a ! -L "$HOME/USERPROFILE" ]; then
    cat<<-EOD >&2
	Error: "$HOME/USERPROFILE" exists but it is not symbolic link.
	EOD
    exit 1
  fi
  
  cat<<-EOD
	mv -v "$HOME" "$TARGET"
	ln -v -s "$TARGET" "$HOME"
	[ ! -e "$HOME/USERPROFILE" ] && ln -v -s "$USERPROFILE" "$HOME/USERPROFILE"
	EOD
}

function cyghome_resetup ()
{
  if [ ! -e "$TARGET" ]; then
    cat<<-EOD >&2
	Error: TARGET does not exist.
	EOD
    exit 1
  fi
  
  cat<<-EOD
	mv -v "$HOME" "${HOME},$(mtime "$HOME")"
	ln -v -s "$TARGET" "$HOME"
	EOD
}

function cyghome_restore ()
{
  if [ "${PWD:0:${#TARGET}}" = "$TARGET" ]; then
    cat<<-EOD >&2
	Error: Current directry is on TARGET.
	Move to out of "$TARGET", before execute "${SCRIPT_FILE}".
	EOD
    exit 1
  fi
  
  if [ ! -e "$TARGET" ]; then
    cat<<-EOD >&2
	Error: TARGET does not exist.
	EOD
    exit 1
  fi
  
  cat<<-EOD
	mv -v "$HOME" "${HOME},$(mtime "$HOME")"
	mv -v "$TARGET" "$HOME"
	EOD
}

function cyghome_ln ()
{
  local i name
  for i; do
    if [ ! -e "$i" ]; then
      cat<<-EOD >&2
	Warning: "$i" does not exist. Skip.
	EOD
      continue
    fi
    name="${i##*/}"
    cat<<-EOD
	[ ! -e "$HOME/$name" ] && ln -v -s "$(realpath "$i")" "$HOME/$name"
	EOD
  done
}

if [ "${PWD:0:${#HOME}}" = "$HOME" ]; then
  cat<<-EOD >&2
	Error: Current directry is on HOME.
	Move to out of "$HOME", before execute "${SCRIPT_FILE}".
	EOD
  exit 1
fi



SUBCMD="$1"
shift
CMD="${SCRIPT_NAME}_${SUBCMD}"

if ! type "$CMD" >& /dev/null; then
  cat<<-EOD >&2
	Error: "$SUBCMD" is not valid subcommand.
	EOD
  exit 1
fi

"$CMD" "$@"