create JSON objects from bash functions

bash-to-json.sh

#!/bin/bash -

PROGRAM="${0##*/}"

if [ $# -eq 0 ]; then
	echo "$PROGRAM: create JSON objects from bash functions"
	echo "Usage: $PROGRAM file1.sh file2.sh [> file.json]"
	exit 1
fi

in_file="$1"

if [ ! -e "$in_file" ]; then
	echo "$in_file does not exist"
	exit 1
elif [ -d "$in_file" ]; then
	echo "$in_file is a directory"
	exit 1
fi

egrep -on '[A-Za-z0-9_]+[(]+[)]' "$in_file" >/dev/null
if [ $? -eq 1 ]; then
	echo "$in_file doesn't have functions"
	exit 1
fi

lineno=()
fname=()

for i in $(egrep -on '[A-Za-z0-9_]+[(]+[)]' "$in_file"  | awk -F ":" '{print $1}')
do
	lineno+=( "$i" )
done

for i in $(egrep -on '[A-Za-z0-9_]+[(]+[)]' "$in_file"  | awk -F ":" '{print $2}')
do
	fname+=( "$i" )
done

for ((i=0; i<${#fname[@]}; i++))
do
	echo "{\"${in_file}\":[\"$(echo ${fname[i]}\" | tr -d '()'), ${lineno[i]}]}"
done