/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

0 vote243 views1 answer
Libodbc1 2.3.7 ubuntu
Shell/Bash
0 vote266 views2 answers
How to restore a non booting grub bootloader
Shell/Bash
5 votes271 views1 answer
Update visual stadio code
Shell/Bash
3 votes306 views2 answers
Add local project to bitbucket
Shell/Bash
0 vote277 views1 answer
Open ssl change pkcs1 to pkcs8
Shell/Bash
1 vote246 views1 answer
How to uninstall unity termanl command
Shell/Bash
1 vote247 views1 answer
Cli generate random string
Shell/Bash
0 vote232 views1 answer
Linux show message box from terminal
Shell/Bash
0 vote200 views1 answer
Git checkout filename
Shell/Bash
1 vote248 views1 answer
Command to deploy on github page
Shell/Bash