/Shell/Bash/Remove white space from file and display result

Remove white space from file and display result

#!/usr/bin/env bash

function show_help()
{
  ME=$(basename "$0")
  IT=$(cat <<EOF

  usage: $ME {REPLACE_WITH}
  
  NOTE: If you pass in TAB, then multiple spaces are replaced with a TAB character

  no args -> multiple spaces replaced with a single space
  TAB     -> multiple spaces replaced with a single tab character
  TEST    -> multiple spaces replaced with the phrase "TEST"

  $ME 
EOF
)
  echo "$IT"
  echo
  exit
}


if [ "$1" == "help" ]
then
  show_help
fi

# Show help if we're not getting data from stdin
if [ -t 0 ]; then
  show_help
fi

REPLACE_WITH=${1:-' '}

if [ "$REPLACE_WITH" == "tab" ]
then
  REPLACE_WITH=$'\t'
fi
if [ "$REPLACE_WITH" == "TAB" ]
then
  REPLACE_WITH=$'\t'
fi

sed "s/ \{1,\}/$REPLACE_WITH/gp"

Source: unix.stackexchange.com

Similar codes

7 votes160 views3 answers
Install pygame on mac
Shell/Bash
0 vote202 views1 answer
Run c64 in docker
Shell/Bash
1 vote155 views2 answers
Docker machine ip
Shell/Bash
-1 vote189 views1 answer
How to download Gnome Screensaver on linux
Shell/Bash
2 votes134 views1 answer
Clear temp files in ubuntu
Shell/Bash
1 vote154 views1 answer
Mac bash_profile file not being sourced
Shell/Bash
0 vote182 views3 answers
Regex match two characters
Shell/Bash
5 votes151 views2 answers
How to completely uninstall android studio mac
Shell/Bash
0 vote189 views1 answer
Umount: /mnt: target is busy.
Shell/Bash
3 votes169 views1 answer
Ubuntu install sfml
Shell/Bash