feat(u/bktemp-checkAppFileDir):Fix zero-length string bug
[BK-2020-03.git] / unitproc / bkmvln
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bed7eb8f 1#!/bin/bash
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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
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11
12help() {
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
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21# Show help if `--help` flag given, if arg1 isn't a symbolic link, or
22# if arg2 isn't a directory.
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23[ "$1" == "--help" ] || [ ! -L "$1" ] || [ ! -d "$2" ] && help
24
25set -e # exit on error
26
27orig_link="$1"
28orig_name=$( basename "$orig_link" )
29orig_dest=$( readlink -f "$orig_link" )
30dest_dir="$2"
31
32ln -r -s "$orig_dest" "$dest_dir/$orig_name"
33rm "$orig_link"