# functions for working with ini/cfg files

#

# This file is part of the EESSI software layer, see

# https://github.com/EESSI/software-layer.git

#

# author: Thomas Roeblitz (@trz42)

#

# license: GPLv2

#

# global variables

# -a -> indexed array

# -A -> associative array

declare -A cfg_repos

declare -A cfg_file_map

# functions

function cfg_get_section {

if [[ "$1" =~ ^(\[)(.*)(\])$ ]]; then

echo ${BASH_REMATCH[2]}

else

echo ""

fi

}

function cfg_get_key_value {

if [[ "$1" =~ ^([^=]+)=([^=]+)$ ]]; then

echo "${BASH_REMATCH[1]}=${BASH_REMATCH[2]}"

else

echo ""

fi

}

function cfg_load {

local cur_section=""

local cur_key=""

local cur_val=""

IFS=

while read -r line; do

new_section=$(cfg_get_section $line)

# got a new section

if [[ -n "$new_section" ]]; then

cur_section=$new_section

# not a section, try a key value

else

val=$(cfg_get_key_value $line)

# trim leading and trailing spaces as well

cur_key=$(echo $val | cut -f1 -d'=' | cfg_trim_spaces)

cur_val=$(echo $val | cut -f2 -d'=' | cfg_trim_spaces)

if [[ -n "$cur_key" ]]; then

# section + key is the associative in bash array, the field separator is space

cfg_repos[${cur_section} ${cur_key}]=$cur_val

fi

fi

done <$1

}

function cfg_print {

for index in "${!cfg_repos[@]}"

do

# split the associative key in to section and key

echo -n "section : $(echo $index | cut -f1 -d ' ');"

echo -n "key : $(echo $index | cut -f2 -d ' ');"

echo "value: ${cfg_repos[$index]}"

done

}

function cfg_sections {

declare -A sections

for key in "${!cfg_repos[@]}"

do

# extract section from the associative key

section=$(echo $key | cut -f1 -d ' ')

sections[${section}]=1

done

for repo in "${!sections[@]}"

do

echo "${repo}"

done

}

function cfg_get_value {

section=$1

key=$2

echo "${cfg_repos[$section $key]}"

}

function cfg_trim_spaces {

# reads from argument $1 or stdin

if [[ $# -gt 0 ]]; then

sed -e 's/^[[:space:]]*//' -e 's/[[:space:]]*$//' <<< ${1}

else

sed -e 's/^[[:space:]]*//' -e 's/[[:space:]]*$//' < /dev/stdin

fi

}

function cfg_trim_quotes {

# reads from argument $1 or stdin

if [[ $# -gt 0 ]]; then

sed -e 's/^"*//' -e 's/"*$//' <<< ${1}

else

sed -e 's/^"*//' -e 's/"*$//' < /dev/stdin

fi

}

function cfg_trim_curly_brackets {

# reads from argument $1 or stdin

if [[ $# -gt 0 ]]; then

sed -e 's/^{*//' -e 's/}*$//' <<< ${1}

else

sed -e 's/^{*//' -e 's/}*$//' < /dev/stdin

fi

}

function cfg_get_all_sections {

# first field in keys

# 1. get first field in all keys, 2. filter duplicates, 3. return them as string

declare -A all_sections

for key in "${!cfg_repos[@]}"

do

section=$(echo "$key" | cut -f1 -d' ')

all_sections[${section}]=1

done

sections=

for sec_key in "${!all_sections[@]}"

do

sections="${sections} ${sec_key}"

done

echo "${sections}" | cfg_trim_spaces

}

function cfg_init_file_map {

# strip '{' and '}' from config_map

# split config_map at ','

# for each item: split at ':' use first as key, second as value

# reset global variable

cfg_file_map=()

# expects a string containing the config_map from the cfg file

# trim leading and trailing curly brackets

cm_trimmed=$(cfg_trim_curly_brackets "$1")

# split into elements along ','

declare -a cm_mappings

IFS=',' read -r -a cm_mappings <<< "${cm_trimmed}"

for index in "${!cm_mappings[@]}"

do

# split mapping into key and value

map_key=$(echo ${cm_mappings[index]} | cut -f1 -d':')

map_value=$(echo ${cm_mappings[index]} | cut -f2 -d':')

# trim spaces and double quotes at start and end

tr_key=$(cfg_trim_spaces "${map_key}" | cfg_trim_quotes)

tr_value=$(cfg_trim_spaces "${map_value}" | cfg_trim_quotes)

cfg_file_map[${tr_key}]=${tr_value}

done

}

function cfg_print_map {

for index in "${!cfg_file_map[@]}"

do

echo "${index} --> ${cfg_file_map[${index}]}"

done

}