unitproc/bkmvln

   1 #!/bin/bash
   2 # Desc: Moves sybolic link
   3 # Usage: bkmvln
   4 # Input: arg1: path of existing symbolic link
   5 #        arg2: path where link should be moved
   6 # Output: None
   7 # Depends: gnucoreutils 8.30
   8 # Ref/Attrib:
   9 #  1. Christopher Neylan. https://stackoverflow.com/questions/8523159/how-do-i-move-a-relative-symbolic-link#8523293
  10 #  2. Tomáš Pospíšek. https://stackoverflow.com/a/30508868
  11
  12 help() {
  13    echo 'usage: mv_ln src_ln dest_dir'
  14    echo '       mv_ln --help'
  15    echo
  16    echo '  Move the symbolic link src_ln into dest_dir while'
  17    echo '  keeping it relative'
  18    exit 1
  19 }
  20
  21 # Show help if `--help` flag given, if arg1 isn't a symbolic link, or
  22 #   if arg2 isn't a directory.
  23 [ "$1" == "--help" ] || [ ! -L "$1" ] || [ ! -d "$2" ] && help
  24
  25 set -e # exit on error
  26
  27 orig_link="$1"
  28 orig_name=$( basename    "$orig_link" )
  29 orig_dest=$( readlink -f "$orig_link" )
  30 dest_dir="$2"
  31
  32 ln -r -s "$orig_dest" "$dest_dir/$orig_name"
  33 rm "$orig_link"