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|
#!/bin/sh
usage () {
printf "Usage $0 "
echo << "EOF"
OPTIONS... [FILTER]
Print the parsed config file filtering by the keys
Arguments:
-f file read configuration from a file, uses /dev/sdtin otherwise
-v only print values
-c n print the last [n]
EOF
}
# parse a single config file line
#
parse_line() {
[ $# = "0" ] && return
local line="$@"
local key=$1
shift
local value="$@"
[ "$key" = "include" ] && cat $value | parse && return
[ "$key" = "]" ] && unset list=${list%.*} && printf "\n" && return
[ "$key" = "}" ] && unset level=${level%.*} && return
case ${value##* } in
"{")
level="${level}${key}."
;;
"[")
list="${list}${list:+.}${key}"
printf "$level$key:"
;;
*)
[ "${#list}" = "0" ] &&
printf "$level$key:$value\n" ||
printf "$line "
;;
esac
}
# print the parsed values from the config file in key:value format
#
parse () {
local file="$1"
export level=""
export list=""
while IFS= read -r line; do
parse_line $line
done < "/dev/stdin"
}
# Use the env variable if exists
[ -z ${CONF_FILE} ] && CONF_FILE="/dev/stdin"
# initialise options
print_keys=true
count=
while getopts ":f:c:v" opt; do
case "${opt}" in
f)
[ "${OPTARG}" = "-" ] &&
CONF_FILE="/dev/stdin" ||
CONF_FILE="${OPTARG}"
;;
v)
print_keys=false
;;
c)
count="${OPTARG}q"
;;
*)
esac
done
shift $((OPTIND-1))
[ $# = 0 ] &&
pattern=".*" ||
pattern=$(echo $@ | sed "s/\*/[^:]*/g")
$print_keys &&
pattern="s/^($pattern:.+)/\1/p;${count}" ||
pattern="s/^$pattern:(.+)/\1/p;${count}"
# strip whitespace
sed "s/^#.*$\|\s(\s\+)\|^\s\|\s^\|;*$//g" $CONF_FILE |
parse $@ |
sed -rn $pattern
|
