Yell Die Try functions for bash...

README.md

Explanation

• yell: print the script name and all arguments to stderr:
  • $0 is the path to the script
  • $* are all arguments.
  • >&2 means > redirect stdout to & pipe 2. pipe 1 would be stdout itself.
• die does the same as yell, but exits with a non-0 exit status, which means "fail".
• try uses the || (boolean OR), which only evaluates the right side if the left one didn’t fail.
  • $@ is all arguments again, but different.

ydt.sh

#!/usr/bin/env bash -xe

function yell () 
{ 
  echo "$0: $*" >&2
}

function die () 
{ 
  yell "$*"; exit 111
}

function try () 
{ 
  "$@" || die "cannot $*" 
}