beautysh $FILE

#!/usr/bin/env bash

# @(#) s1       Demonstrate beautysh.

# Utility functions: print-as-echo, print-line-with-visual-space, debug.
# export PATH="/usr/local/bin:/usr/bin:/bin"
LC_ALL=C ; LANG=C ; export LC_ALL LANG
pe() { for _i;do printf "%s" "$_i";done; printf "\n"; }
pl() { pe;pe "-----" ;pe "$*"; }
em() { pe "$*" >&2 ; }
db() { ( printf " db, ";for _i;do printf "%s" "$_i";done;printf "\n" ) >&2 ; }
db() { : ; }
C=$HOME/bin/context && [ -f $C ] && $C beautysh

FILE=${1-s1.sh}
cp sacred.sh $FILE

pl " Input data file $FILE:"
cat $FILE

pl " Results:"
beautysh $FILE
cat $FILE

exit 0

$ ./s1 

Environment: LC_ALL = C, LANG = C
(Versions displayed with local utility "version")
OS, ker|rel, machine: Linux, 3.16.0-4-amd64, x86_64
Distribution        : Debian 8.6 (jessie) 
bash GNU bash 4.3.30
beautysh - ( local: RepRev 1.4, ~/bin/beautysh, 2016-03-31 )

-----
 Input data file s1.sh:
#!/usr/bin/env bash

# @(#) s1.sh    Demonstrate tidy scripts, beautysh.

# Functions.

pe() { for _i;do printf "%s" "$_i";done; printf "\n"; }
pl() { pe;pe "-----" ;pe "$*"; }

echo " Hello, world."
if [ $# -gt 0 ]
then
echo " Argument 1 is $1"
fi

        if [ $# -ge 2 ] ; then
                echo " Argument 2 is $2"
                if [[ $2 =~ b ]]
                then
                  echo " Hit!, arg 2 was a b."
                  fi
                        fi

case $0 in
run)    ./run ;;

        xxx)    ./exit
        ;;

        *)      echo " Error -- unknown keyword: $0." >&2 ; exit 1 ;;

             esac

exit 0

-----
 Results:
#!/usr/bin/env bash

# @(#) s1.sh    Demonstrate tidy scripts, beautysh.

# Functions.

pe() { for _i;do printf "%s" "$_i";done; printf "\n"; }
pl() { pe;pe "-----" ;pe "$*"; }

echo " Hello, world."
if [ $# -gt 0 ]
then
  echo " Argument 1 is $1"
fi

if [ $# -ge 2 ] ; then
  echo " Argument 2 is $2"
  if [[ $2 =~ b ]]
  then
    echo " Hit!, arg 2 was a b."
  fi
fi

case $0 in
  run)  ./run ;;
  
  xxx)  ./exit
  ;;
  
  *)    echo " Error -- unknown keyword: $0." >&2 ; exit 1 ;;
  
esac

exit 0